diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/via/cn400/Kconfig | 11 | ||||
| -rw-r--r-- | src/northbridge/via/cn400/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/northbridge/via/cn400/vga.c | 68 | ||||
| -rw-r--r-- | src/northbridge/via/cn400/vgabios.c | 839 | ||||
| -rw-r--r-- | src/northbridge/via/cn400/vgachip.h | 35 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/Kconfig | 11 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/vga.c | 59 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/vgabios.c | 832 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/vgachip.h | 35 | ||||
| -rw-r--r-- | src/northbridge/via/cx700/Kconfig | 35 | ||||
| -rw-r--r-- | src/northbridge/via/cx700/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/northbridge/via/cx700/cx700_vga.c | 56 | ||||
| -rw-r--r-- | src/northbridge/via/cx700/vgabios.c | 782 | ||||
| -rw-r--r-- | src/northbridge/via/vx800/Kconfig | 11 | ||||
| -rw-r--r-- | src/northbridge/via/vx800/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/northbridge/via/vx800/vga.c | 129 | ||||
| -rw-r--r-- | src/northbridge/via/vx800/vgabios.c | 839 | ||||
| -rw-r--r-- | src/northbridge/via/vx800/vgachip.h | 34 |
19 files changed, 275 insertions, 3508 deletions
diff --git a/src/northbridge/via/cn400/Kconfig b/src/northbridge/via/cn400/Kconfig index 67703c9ebe..8a27af42f2 100644 --- a/src/northbridge/via/cn400/Kconfig +++ b/src/northbridge/via/cn400/Kconfig @@ -6,17 +6,6 @@ config FALLBACK_SIZE default 0 depends on NORTHBRIDGE_VIA_CN400 -# this is done by the northbridge's vgabios.c already -config VGA_ROM_RUN - bool - default n - depends on NORTHBRIDGE_VIA_CN400 - -config PCI_ROM_RUN - bool - default n - depends on NORTHBRIDGE_VIA_CN400 - # TODO: Values are from the CX700 datasheet, not sure if this matches CN400. # TODO: What should be the per-chipset default value here? choice diff --git a/src/northbridge/via/cn400/Makefile.inc b/src/northbridge/via/cn400/Makefile.inc index 032f4b74e2..89bff39862 100644 --- a/src/northbridge/via/cn400/Makefile.inc +++ b/src/northbridge/via/cn400/Makefile.inc @@ -18,8 +18,6 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## -obj-y += vgabios.o - driver-y += northbridge.o driver-y += agp.o driver-y += vga.o diff --git a/src/northbridge/via/cn400/vga.c b/src/northbridge/via/cn400/vga.c index c71431c7c4..01227f6f9a 100644 --- a/src/northbridge/via/cn400/vga.c +++ b/src/northbridge/via/cn400/vga.c @@ -33,24 +33,63 @@ #include <string.h> #include <bitops.h> #include <cpu/cpu.h> +#include <arch/interrupt.h> #include "chip.h" #include "northbridge.h" #include "cn400.h" -#include "vgachip.h" -void write_protect_vgabios(void) +static int via_cn400_int15_handler(struct eregs *regs) { - /* Don't bother for now. */ + int res=-1; + printk(BIOS_DEBUG, "via_cn400_int15_handler\n"); + switch(regs->eax & 0xffff) { + case 0x5f19: + break; + case 0x5f18: + regs->eax=0x5f; + regs->ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory + regs->ecx=0x060; + res=0; + break; + case 0x5f00: + regs->eax = 0x8600; + break; + case 0x5f01: + regs->eax = 0x5f; + regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 + res = 0; + break; + case 0x5f02: + regs->eax=0x5f; + regs->ebx= (regs->ebx & 0xffff0000) | 2; + regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only + regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default + res=0; + break; + case 0x5f0f: + regs->eax=0x860f; + break; + default: + printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", + regs->eax & 0xffff); + break; + } + return res; } static void vga_init(device_t dev) { u8 reg8; u32 temp; -#ifdef DEBUG_CN400 - int i, j; -#endif + mainboard_interrupt_handlers(0x15, &via_cn400_int15_handler); + +#undef OLD_BOCHS_METHOD +#ifdef OLD_BOCHS_METHOD + // XXX We might need more bios hooks in the f segment, but + // this way of copying the BOCHS BIOS does not work anymore. + // As soon as someone verifies that CN400 can init VGA, the + // code should be removed. temp = (0xffffffff - CONFIG_FALLBACK_SIZE - 0xffff); printk(BIOS_DEBUG, "Copying BOCHS BIOS from 0x%08X to 0xf000\n", temp); /* @@ -59,7 +98,7 @@ static void vga_init(device_t dev) */ //memcpy(0xf0000, (0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000); memcpy((void *)0xf0000, (void *)temp, 0x10000); - printk(BIOS_DEBUG, "Initializing VGA\n"); +#endif /* Set memory rate to 200 MHz. */ outb(0x3d, CRTM_INDEX); @@ -79,16 +118,13 @@ static void vga_init(device_t dev) pci_write_config32(dev, 0x10, 0xf0000008); pci_write_config32(dev, 0x14, 0xf4000000); - printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n"); - setup_realmode_idt(); - printk(BIOS_DEBUG, "DO THE VGA BIOS\n"); - do_vgabios(); - /* VGA seems to work without this, but crash & burn with it. */ - // printk(BIOS_DEBUG, "Enable VGA console\n"); - // vga_enable_console(); + printk(BIOS_DEBUG, "Initializing VGA...\n"); + + pci_dev_init(dev); /* It's not clear if these need to be programmed before or after * the VGA BIOS runs. Try both, clean up later. */ + /* Set memory rate to 200 MHz (again). */ outb(0x3d, CRTM_INDEX); reg8 = inb(CRTM_DATA); @@ -102,10 +138,14 @@ static void vga_init(device_t dev) outb(0x39, SR_INDEX); outb(reg8, SR_DATA); +#ifdef OLD_BOCHS_METHOD /* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */ memset((void *)0xf0000, 0, 0x10000); +#endif #ifdef DEBUG_CN400 + int i, j; + printk(BIOS_SPEW, "%s PCI Header Regs::\n", dev_path(dev)); for (i = 0 ; i < 16; i++) diff --git a/src/northbridge/via/cn400/vgabios.c b/src/northbridge/via/cn400/vgabios.c deleted file mode 100644 index 5519b309cd..0000000000 --- a/src/northbridge/via/cn400/vgabios.c +++ /dev/null @@ -1,839 +0,0 @@ -#include <console/console.h> -#include <device/pci.h> -#include <device/pci_ids.h> -#include <device/pci_ops.h> -#undef __KERNEL__ -#include <arch/io.h> -//#include <printk.h> -#include <string.h> -#include "vgachip.h" -#include <cbfs.h> - -/* vgabios.c. Derived from: */ - -/*------------------------------------------------------------ -*- C -*- - * 2 Kernel Monte a.k.a. Linux loading Linux on x86 - * - * Erik Arjan Hendriks <hendriks@lanl.gov> - * - * This version is a derivative of the original two kernel monte - * which is (C) 2000 Scyld. - * - * Copyright (C) 2000 Scyld Computing Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. - * - * Portions related to the alpha architecture are: - * - * Copyright(C) 2001 University of California. LA-CC Number 01-67. - * This software has been authored by an employee or employees of the - * University of California, operator of the Los Alamos National - * Laboratory under Contract No. W-7405-ENG-36 with the U.S. - * Department of Energy. The U.S. Government has rights to use, - * reproduce, and distribute this software. If the software is - * modified to produce derivative works, such modified software should - * be clearly marked, so as not to confuse it with the version - * available from LANL. - * - * This software may be used and distributed according to the terms - * of the GNU General Public License, incorporated herein by - * reference to http://www.gnu.org/licenses/gpl.html. - * - * This software is provided by the author(s) "as is" and any express - * or implied warranties, including, but not limited to, the implied - * warranties of merchantability and fitness for a particular purpose - * are disclaimed. In no event shall the author(s) be liable for any - * direct, indirect, incidental, special, exemplary, or consequential - * damages (including, but not limited to, procurement of substitute - * goods or services; loss of use, data, or profits; or business - * interruption) however caused and on any theory of liability, - * whether in contract, strict liability, or tort (including - * negligence or otherwise) arising in any way out of the use of this - * software, even if advised of the possibility of such damage. - * - * $Id: vgabios.c,v 1.5 2004/10/06 17:33:52 rminnich Exp $ - *--------------------------------------------------------------------*/ - -/* Modified to be a self sufficient plug in so that it can be used - without reliance on other parts of coreboot's core - (C) 2005 Nick.Barker9@btinternet.com - - Used initially for epia-m where there are problems getting the bios - emulator to successfully run this bios. -*/ - -/* Declare a temporary global descriptor table - necessary because the - Core part of the bios no longer sets up any 16 bit segments */ -__asm__ ( - /* pointer to original gdt */ - "gdtarg: \n" - " .word gdt_limit \n" - " .long gdt \n" - - /* compute the table limit */ - "__mygdt_limit = __mygdt_end - __mygdt - 1 \n" - - "__mygdtaddr: \n" - " .word __mygdt_limit \n" - " .long __mygdt \n" - - "__mygdt: \n" - /* selgdt 0, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - - /* selgdt 8, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - - /* selgdt 0x10, flat code segment */ - " .word 0xffff, 0x0000 \n" - " .byte 0x00, 0x9b, 0xcf, 0x00 \n" - - /* selgdt 0x18, flat data segment */ - " .word 0xffff, 0x0000 \n" - " .byte 0x00, 0x93, 0xcf, 0x00 \n" - - /* selgdt 0x20, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - - /* selgdt 0x28 16-bit 64k code at 0x00000000 */ - " .word 0xffff, 0x0000 \n" - " .byte 0, 0x9a, 0, 0 \n" - - /* selgdt 0x30 16-bit 64k data at 0x00000000 */ - " .word 0xffff, 0x0000 \n" - " .byte 0, 0x92, 0, 0 \n" - - "__mygdt_end: \n" -); - -/* Declare a pointer to where our idt is going to be i.e. at mem zero */ -__asm__ ("__myidt: \n" - /* 16-bit limit */ - " .word 1023 \n" - /* 24-bit base */ - " .long 0 \n" - " .word 0 \n" -); - -/* The address arguments to this function are PHYSICAL ADDRESSES */ -static void real_mode_switch_call_vga(unsigned long devfn) -{ - __asm__ __volatile__ ( - // paranoia -- does ecx get saved? not sure. This is - // the easiest safe thing to do. - " pushal \n" - /* save the stack */ - " mov %esp, __stack \n" - " jmp 1f \n" - "__stack: .long 0 \n" - "1:\n" - /* get devfn into %ecx */ - " movl %esp, %ebp \n" - " movl 8(%ebp), %ecx \n" - /* load 'our' gdt */ - " lgdt %cs:__mygdtaddr \n" - - /* This configures CS properly for real mode. */ - " ljmp $0x28, $__rms_16bit\n" - "__rms_16bit: \n" - " .code16 \n" - /* 16 bit code from here on... */ - - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax \n" - " movl %eax, %cr0 \n" - - /* Now really going into real mode */ - " ljmp $0, $__rms_real\n" - "__rms_real: \n" - - /* put the stack at the end of page zero. - * that way we can easily share it between real and protected, - * since the 16-bit ESP at segment 0 will work for any case. - /* Setup a stack */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - " movl $0x1000, %eax \n" - " movl %eax, %esp \n" - - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - - /* Dump zeros in the other segregs */ - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov $0x40, %ax \n" - " mov %ax, %ds \n" - " mov %cx, %ax \n" - - /* run VGA BIOS at 0xc000:0003 */ - " lcall $0xc000, $0x0003\n" - - /* if we got here, just about done. - * Need to get back to protected mode */ - " movl %cr0, %eax \n" - " orl $0x0000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0 \n" - - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $vgarestart\n" - "vgarestart:\n" - " .code32\n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* restore proper gdt and idt */ - " lgdt %cs:gdtarg \n" - " lidt idtarg \n" - - ".globl vga_exit \n" - "vga_exit: \n" - " mov __stack, %esp \n" - " popal \n" - ); -} - -__asm__ (".text\n""real_mode_switch_end:\n"); -extern char real_mode_switch_end[]; - -/* call vga bios int 10 function 0x4f14 to enable main console - epia-m does not always autosence the main console so forcing it on is good !! */ -void vga_enable_console() -{ - __asm__ __volatile__ ( - /* paranoia -- does ecx get saved? not sure. This is - * the easiest safe thing to do. */ - " pushal \n" - /* save the stack */ - " mov %esp, __stack \n" - - /* load 'our' gdt */ - " lgdt %cs:__mygdtaddr \n" - - /* This configures CS properly for real mode. */ - " ljmp $0x28, $__vga_ec_16bit\n" - "__vga_ec_16bit: \n" - " .code16 \n" - /* 16 bit code from here on... */ - - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax\n" - " movl %eax, %cr0 \n" - - /* Now really going into real mode */ - " ljmp $0, $__vga_ec_real \n" - "__vga_ec_real: \n" - - /* put the stack at the end of page zero. - * that way we can easily share it between real and protected, - * since the 16-bit ESP at segment 0 will work for any case. - /* Setup a stack */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - " movl $0x1000, %eax \n" - " movl %eax, %esp \n" - - /* debugging for RGM */ - " mov $0x11, %al \n" - " outb %al, $0x80 \n" - - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - - /* Dump zeros in the other segregs */ - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - - /* ask bios to enable main console */ - /* set up for int 10 call - values found from X server - * bios call routines */ - " movw $0x4f14,%ax \n" - " movw $0x8003,%bx \n" - " movw $1, %cx \n" - " movw $0, %dx \n" - " movw $0, %di \n" - " int $0x10 \n" - - " movb $0x55, %al \n" - " outb %al, $0x80 \n" - - /* if we got here, just about done. - * Need to get back to protected mode */ - " movl %cr0, %eax \n" - " orl $0x0000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0 \n" - - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $vga_ec_restart\n" - "vga_ec_restart:\n" - " .code32\n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* restore proper gdt and idt */ - " lgdt %cs:gdtarg \n" - " lidt idtarg \n" - " .globl vga__ec_exit \n" - "vga_ec_exit:\n" - " mov __stack, %esp \n" - " popal\n" - ); -} - -void do_vgabios(void) -{ - device_t dev; - unsigned long busdevfn; - u32 rom; - unsigned char *buf; - unsigned int size = 64*1024; - int i; - - /* clear vga bios data area */ - for (i = 0x400; i < 0x500; i++) { - *(unsigned char *) i = 0; - } - - dev = dev_find_class(PCI_CLASS_DISPLAY_VGA<<8 , 0); - - if (!dev) { - printk(BIOS_DEBUG, "NO VGA FOUND\n"); - return; - } - printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device); - - /* declare rom address here - keep any config data out of the way - * of core LXB stuff */ - - rom = (u32)cbfs_load_optionrom(dev->vendor, dev->device, 0); - pci_write_config32(dev, PCI_ROM_ADDRESS, rom|1); - printk(BIOS_DEBUG, "VGA BIOS ROM base address: %x\n", rom); - - buf = (unsigned char *) rom; - if ((buf[0] == 0x55) && (buf[1] == 0xaa)) { - memcpy((void *) 0xc0000, buf, size); - - write_protect_vgabios(); // in northbridge - - // check signature again - buf = (unsigned char *) 0xc0000; - if (buf[0]==0x55 && buf[1]==0xAA) { - busdevfn = (dev->bus->secondary << 8) | dev->path.pci.devfn; - printk(BIOS_DEBUG, "bus/devfn = %#lx\n", busdevfn); - - real_mode_switch_call_vga(busdevfn); - } else - printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n"); - } else - printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]); - - pci_write_config32(dev, PCI_ROM_ADDRESS, 0); -} - - -// we had hoped to avoid this. -// this is a stub IDT only. It's main purpose is to ignore calls -// to the BIOS. -// no longer. Dammit. We have to respond to these. -struct realidt { - unsigned short offset, cs; -}; - -// from a handy writeup that andrey found. - -// handler. -// There are some assumptions we can make here. -// First, the Top Of Stack (TOS) is located on the top of page zero. -// we can share this stack between real and protected mode. -// that simplifies a lot of things ... -// we'll just push all the registers on the stack as longwords, -// and pop to protected mode. -// second, since this only ever runs as part of coreboot, -// we know all the segment register values -- so we don't save any. -// keep the handler that calls things small. It can do a call to -// more complex code in coreboot itself. This helps a lot as we don't -// have to do address fixup in this little stub, and calls are absolute -// so the handler is relocatable. -void handler(void) -{ - __asm__ __volatile__ ( - " .code16 \n" - "idthandle: \n" - " pushal \n" - " movb $0, %al \n" - " ljmp $0, $callbiosint16\n" - "end_idthandle: \n" - " .code32 \n" - ); -} - -void debughandler(void) -{ - __asm__ __volatile__ ( - " .code16 \n" - "debughandle: \n" - " pushw %cx \n" - " movw $250, %cx \n" - "dbh1: \n" - " loop dbh1 \n" - " popw %cx \n" - " iret \n" - "end_debughandle: \n" - ".code32 \n" - ); -} - -// Calling conventions. The first C function is called with this stuff -// on the stack. They look like value parameters, but note that if you -// modify them they will go back to the INTx function modified. -// the C function will call the biosint function with these as -// REFERENCE parameters. In this way, we can easily get -// returns back to the INTx caller (i.e. vgabios) -void callbiosint(void) -{ - __asm__ __volatile__ ( - " .code16 \n" - "callbiosint16: \n" - " push %ds \n" - " push %es \n" - " push %fs \n" - " push %gs \n" - // clean up the int #. To save space we put it in the lower - // byte. But the top 24 bits are junk. - " andl $0xff, %eax\n" - // this push does two things: - // - put the INT # on the stack as a parameter - // - provides us with a temp for the %cr0 mods. - " pushl %eax \n" - " movl %cr0, %eax\n" - " orl $0x00000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0\n" - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $biosprotect\n" - "biosprotect: \n" - " .code32 \n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - " lidt idtarg \n" - " call biosint \n" - // back to real mode ... - " ljmp $0x28, $__rms_16bit2\n" - "__rms_16bit2: \n" - " .code16 \n" - /* 16 bit code from here on... */ - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax \n" - " movl %eax, %cr0 \n" - - /* Now really going into real mode */ - " ljmp $0, $__rms_real2 \n" - "__rms_real2: \n" - - /* Setup a stack - * FixME: where is esp? */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - - /* ebugging for RGM */ - " mov $0x11, %al \n" - " outb %al, $0x80 \n" - - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - - /* Dump zeros in the other segregs */ - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov $0x40, %ax \n" - " mov %ax, %ds \n" - - /* pop the INT # that you pushed earlier */ - " popl %eax \n" - " pop %gs \n" - " pop %fs \n" - " pop %es \n" - " pop %ds \n" - " popal \n" - " iret \n" - " .code32 \n" - ); -} - -enum { - PCIBIOS = 0x1a, - MEMSIZE = 0x12 -}; - -int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags); - -int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags - ); - -extern void vga_exit(void); - -int biosint(unsigned long intnumber, - unsigned long gsfs, unsigned long dses, - unsigned long edi, unsigned long esi, - unsigned long ebp, unsigned long esp, - unsigned long ebx, unsigned long edx, - unsigned long ecx, unsigned long eax, - unsigned long cs_ip, unsigned short stackflags) -{ - unsigned long ip; - unsigned long cs; - unsigned long flags; - int ret = -1; - - ip = cs_ip & 0xffff; - cs = cs_ip >> 16; - flags = stackflags; - - printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber); - printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", - eax, ebx, ecx, edx); - printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", - ebp, esp, edi, esi); - printk(BIOS_DEBUG, "biosint: ip 0x%lx cs 0x%lx flags 0x%lx\n", - ip, cs, flags); - - // cases in a good compiler are just as good as your own tables. - switch (intnumber) { - case 0 ... 15: - // These are not BIOS service, but the CPU-generated exceptions - printk(BIOS_INFO, "biosint: Oops, exception %lu\n", intnumber); - if (esp < 0x1000) { - printk(BIOS_DEBUG, "Stack contents: "); - while (esp < 0x1000) { - printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *) esp); - esp += 2; - } - printk(BIOS_DEBUG, "\n"); - } - printk(BIOS_DEBUG, "biosint: Bailing out\n"); - // "longjmp" - vga_exit(); - break; - - case PCIBIOS: - ret = pcibios( &edi, &esi, &ebp, &esp, - &ebx, &edx, &ecx, &eax, &flags); - break; - case MEMSIZE: - // who cares. - eax = 64 * 1024; - ret = 0; - break; - case 0x15: - ret=handleint21( &edi, &esi, &ebp, &esp, - &ebx, &edx, &ecx, &eax, &flags); - break; - default: - printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%lx\n", intnumber); - break; - } - if (ret) - flags |= 1; // carry flags - else - flags &= ~1; - stackflags = flags; - return ret; -} - - -void setup_realmode_idt(void) -{ - extern unsigned char idthandle, end_idthandle; - extern unsigned char debughandle, end_debughandle; - - int i; - struct realidt *idts = (struct realidt *) 0; - int codesize = &end_idthandle - &idthandle; - unsigned char *intbyte, *codeptr; - - // for each int, we create a customized little handler - // that just pushes %ax, puts the int # in %al, - // then calls the common interrupt handler. - // this necessitated because intel didn't know much about - // architecture when they did the 8086 (it shows) - // (hmm do they know anymore even now :-) - // obviously you can see I don't really care about memory - // efficiency. If I did I would probe back through the stack - // and get it that way. But that's really disgusting. - for (i = 0; i < 256; i++) { - idts[i].cs = 0; - codeptr = (char*) 4096 + i * codesize; - idts[i].offset = (unsigned) codeptr; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = i; - } - - // fixed entry points - - // VGA BIOSes tend to hardcode f000:f065 as the previous handler of - // int10. - // calling convention here is the same as INTs, we can reuse - // the int entry code. - codeptr = (char*) 0xff065; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = 0x42; /* int42 is the relocated int10 */ - - /* debug handler - useful to set a programmable delay between instructions if the - TF bit is set upon call to real mode */ - idts[1].cs = 0; - idts[1].offset = 16384; - memcpy(16384, &debughandle, &end_debughandle - &debughandle); - - -} - - - -enum { - CHECK = 0xb001, - FINDDEV = 0xb102, - READCONFBYTE = 0xb108, - READCONFWORD = 0xb109, - READCONFDWORD = 0xb10a, - WRITECONFBYTE = 0xb10b, - WRITECONFWORD = 0xb10c, - WRITECONFDWORD = 0xb10d -}; - -// errors go in AH. Just set these up so that word assigns -// will work. KISS. -enum { - PCIBIOS_NODEV = 0x8600, - PCIBIOS_BADREG = 0x8700 -}; - -int -pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags) -{ - unsigned long edi = *pedi; - unsigned long esi = *pesi; - unsigned long ebp = *pebp; - unsigned long esp = *pesp; - unsigned long ebx = *pebx; - unsigned long edx = *pedx; - unsigned long ecx = *pecx; - unsigned long eax = *peax; - unsigned long flags = *pflags; - unsigned short func = (unsigned short) eax; - int retval = 0; - unsigned short devid, vendorid, devfn; - short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */ - unsigned char bus; - device_t dev; - - switch(func) { - case CHECK: - *pedx = 0x4350; - *pecx = 0x2049; - retval = 0; - break; - case FINDDEV: - { - devid = *pecx; - vendorid = *pedx; - devindex = *pesi; - dev = 0; - while ((dev = dev_find_device(vendorid, devid, dev))) { - if (devindex <= 0) - break; - devindex--; - } - if (dev) { - unsigned short busdevfn; - *peax = 0; - // busnum is an unsigned char; - // devfn is an int, so we mask it off. - busdevfn = (dev->bus->secondary << 8) - | (dev->path.pci.devfn & 0xff); - printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func, busdevfn); - *pebx = busdevfn; - retval = 0; - } else { - *peax = PCIBIOS_NODEV; - retval = -1; - } - } - break; - case READCONFDWORD: - case READCONFWORD: - case READCONFBYTE: - case WRITECONFDWORD: - case WRITECONFWORD: - case WRITECONFBYTE: - { - unsigned long dword; - unsigned short word; - unsigned char byte; - unsigned char reg; - - devfn = *pebx & 0xff; - bus = *pebx >> 8; - reg = *pedi; - dev = dev_find_slot(bus, devfn); - if (! dev) { - printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn); - // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn! - *peax = PCIBIOS_BADREG; - retval = -1; - } - switch(func) { - case READCONFBYTE: - byte = pci_read_config8(dev, reg); - *pecx = byte; - break; - case READCONFWORD: - word = pci_read_config16(dev, reg); - *pecx = word; - break; - case READCONFDWORD: - dword = pci_read_config32(dev, reg); - *pecx = dword; - break; - case WRITECONFBYTE: - byte = *pecx; - pci_write_config8(dev, reg, byte); - break; - case WRITECONFWORD: - word = *pecx; - pci_write_config16(dev, reg, word); - break; - case WRITECONFDWORD: - dword = *pecx; - pci_write_config32(dev, reg, dword); - break; - } - - if (retval) - retval = PCIBIOS_BADREG; - printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n", - func, bus, devfn, reg, *pecx); - *peax = 0; - retval = 0; - } - break; - default: - printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func); - break; - } - - return retval; -} - -int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp, - unsigned long *esp, unsigned long *ebx, unsigned long *edx, - unsigned long *ecx, unsigned long *eax, unsigned long *flags) -{ - int res=-1; - switch(*eax&0xffff) - { - case 0x5f19: - break; - case 0x5f18: - *eax=0x5f; - *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory - *ecx=0x060; - res=0; - break; - case 0x5f00: - *eax = 0x8600; - break; - case 0x5f01: - *eax = 0x5f; - *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 - res = 0; - break; - case 0x5f02: - *eax=0x5f; - *ebx= (*ebx & 0xffff0000) | 2; - *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only - *edx= (*edx & 0xffff0000) | 0; // TV Layout - default - res=0; - break; - case 0x5f0f: - *eax=0x860f; - break; - } - return res; -} diff --git a/src/northbridge/via/cn400/vgachip.h b/src/northbridge/via/cn400/vgachip.h deleted file mode 100644 index 038ffec3ec..0000000000 --- a/src/northbridge/via/cn400/vgachip.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef _PC80_VGABIOS -#define _PC80_VGABIOS - -extern struct chip_control pc80_vgabios_control; - -struct pc80_vgabios_config { - int nothing; -}; - -void vga_enable_console(void); -void do_vgabios(void); -void setup_realmode_idt(void); -void write_protect_vgabios(void); - -#endif /* _PC80_VGABIOS */ diff --git a/src/northbridge/via/cn700/Kconfig b/src/northbridge/via/cn700/Kconfig index 8795d770b2..3fd9e8f67e 100644 --- a/src/northbridge/via/cn700/Kconfig +++ b/src/northbridge/via/cn700/Kconfig @@ -7,17 +7,6 @@ config FALLBACK_SIZE default 0 depends on NORTHBRIDGE_VIA_CN700 -# this is done by the northbridge's vgabios.c already -config VGA_ROM_RUN - bool - default n - depends on NORTHBRIDGE_VIA_CN700 - -config PCI_ROM_RUN - bool - default n - depends on NORTHBRIDGE_VIA_CN700 - # TODO: Values are from the CX700 datasheet, not sure if this matches CN700. # TODO: What should be the per-chipset default value here? choice diff --git a/src/northbridge/via/cn700/Makefile.inc b/src/northbridge/via/cn700/Makefile.inc index b63847d858..c0aa7b9e43 100644 --- a/src/northbridge/via/cn700/Makefile.inc +++ b/src/northbridge/via/cn700/Makefile.inc @@ -18,8 +18,6 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## -obj-y += vgabios.o - driver-y += northbridge.o driver-y += agp.o driver-y += vga.o diff --git a/src/northbridge/via/cn700/vga.c b/src/northbridge/via/cn700/vga.c index 789dbfb480..69f188b01e 100644 --- a/src/northbridge/via/cn700/vga.c +++ b/src/northbridge/via/cn700/vga.c @@ -33,28 +33,65 @@ #include <string.h> #include <bitops.h> #include <cpu/cpu.h> +#include <arch/interrupt.h> #include "chip.h" #include "northbridge.h" #include "cn700.h" -#include "vgachip.h" -void write_protect_vgabios(void) +static int via_cn700_int15_handler(struct eregs *regs) { - /* Don't bother for now. */ + int res=-1; + printk(BIOS_DEBUG, "via_cn700_int15_handler\n"); + switch(regs->eax & 0xffff) { + case 0x5f19: + break; + case 0x5f18: + regs->eax=0x5f; + regs->ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory + regs->ecx=0x060; + res=0; + break; + case 0x5f00: + regs->eax = 0x8600; + break; + case 0x5f01: + regs->eax = 0x5f; + regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 + res = 0; + break; + case 0x5f02: + regs->eax=0x5f; + regs->ebx= (regs->ebx & 0xffff0000) | 2; + regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only + regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default + res=0; + break; + case 0x5f0f: + regs->eax=0x860f; + break; + default: + printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", + regs->eax & 0xffff); + break; + } + return res; } static void vga_init(device_t dev) { u8 reg8; + mainboard_interrupt_handlers(0x15, &via_cn700_int15_handler); + +#undef OLD_BOCHS_METHOD +#ifdef OLD_BOCHS_METHOD print_debug("Copying BOCHS BIOS to 0xf000\n"); /* * Copy BOCHS BIOS from 4G-CONFIG_ROM_SIZE-64k (in flash) to 0xf0000 (in RAM) * This is for compatibility with the VGA ROM's BIOS callbacks. */ memcpy((void *)0xf0000, (const void *)(0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000); - - printk(BIOS_DEBUG, "Initializing VGA\n"); +#endif /* Set memory rate to 200 MHz. */ outb(0x3d, CRTM_INDEX); @@ -74,13 +111,9 @@ static void vga_init(device_t dev) pci_write_config32(dev, 0x10, 0xf4000008); pci_write_config32(dev, 0x14, 0xfb000000); - printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n"); - setup_realmode_idt(); - printk(BIOS_DEBUG, "DO THE VGA BIOS\n"); - do_vgabios(); - /* VGA seems to work without this, but crash & burn with it. */ - // printk(BIOS_DEBUG, "Enable VGA console\n"); - // vga_enable_console(); + printk(BIOS_DEBUG, "Initializing VGA...\n"); + + pci_dev_init(dev); /* It's not clear if these need to be programmed before or after * the VGA BIOS runs. Try both, clean up later. */ @@ -97,8 +130,10 @@ static void vga_init(device_t dev) outb(0x39, SR_INDEX); outb(reg8, SR_DATA); +#ifdef OLD_BOCHS_METHOD /* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */ memset((void *)0xf0000, 0, 0x10000); +#endif } static const struct device_operations vga_operations = { diff --git a/src/northbridge/via/cn700/vgabios.c b/src/northbridge/via/cn700/vgabios.c deleted file mode 100644 index 83ca814eeb..0000000000 --- a/src/northbridge/via/cn700/vgabios.c +++ /dev/null @@ -1,832 +0,0 @@ -#include <console/console.h> -#include <device/pci.h> -#include <device/pci_ids.h> -#include <device/pci_ops.h> -#undef __KERNEL__ -#include <arch/io.h> -#include <stddef.h> -#include <string.h> -#include "vgachip.h" -#include <cbfs.h> - -/* vgabios.c. Derived from: */ - -/*------------------------------------------------------------ -*- C -*- - * 2 Kernel Monte a.k.a. Linux loading Linux on x86 - * - * Erik Arjan Hendriks <hendriks@lanl.gov> - * - * This version is a derivative of the original two kernel monte - * which is (C) 2000 Scyld. - * - * Copyright (C) 2000 Scyld Computing Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. - * - * Portions related to the alpha architecture are: - * - * Copyright(C) 2001 University of California. LA-CC Number 01-67. - * This software has been authored by an employee or employees of the - * University of California, operator of the Los Alamos National - * Laboratory under Contract No. W-7405-ENG-36 with the U.S. - * Department of Energy. The U.S. Government has rights to use, - * reproduce, and distribute this software. If the software is - * modified to produce derivative works, such modified software should - * be clearly marked, so as not to confuse it with the version - * available from LANL. - * - * This software may be used and distributed according to the terms - * of the GNU General Public License, incorporated herein by - * reference to http://www.gnu.org/licenses/gpl.html. - * - * This software is provided by the author(s) "as is" and any express - * or implied warranties, including, but not limited to, the implied - * warranties of merchantability and fitness for a particular purpose - * are disclaimed. In no event shall the author(s) be liable for any - * direct, indirect, incidental, special, exemplary, or consequential - * damages (including, but not limited to, procurement of substitute - * goods or services; loss of use, data, or profits; or business - * interruption) however caused and on any theory of liability, - * whether in contract, strict liability, or tort (including - * negligence or otherwise) arising in any way out of the use of this - * software, even if advised of the possibility of such damage. - * - * $Id: vgabios.c,v 1.5 2004/10/06 17:33:52 rminnich Exp $ - *--------------------------------------------------------------------*/ - -/* Modified to be a self sufficient plug in so that it can be used - without reliance on other parts of coreboot's core - (C) 2005 Nick.Barker9@btinternet.com - - Used initially for epia-m where there are problems getting the bios - emulator to successfully run this bios. -*/ - -/* Declare a temporary global descriptor table - necessary because the - Core part of the bios no longer sets up any 16 bit segments */ -__asm__ ( - /* pointer to original gdt */ - "gdtarg: \n" - " .word gdt_limit \n" - " .long gdt \n" - - /* compute the table limit */ - "__mygdt_limit = __mygdt_end - __mygdt - 1 \n" - - "__mygdtaddr: \n" - " .word __mygdt_limit \n" - " .long __mygdt \n" - - "__mygdt: \n" - /* selgdt 0, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - - /* selgdt 8, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - - /* selgdt 0x10, flat code segment */ - " .word 0xffff, 0x0000 \n" - " .byte 0x00, 0x9b, 0xcf, 0x00 \n" - - /* selgdt 0x18, flat data segment */ - " .word 0xffff, 0x0000 \n" - " .byte 0x00, 0x93, 0xcf, 0x00 \n" - - /* selgdt 0x20, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - - /* selgdt 0x28 16-bit 64k code at 0x00000000 */ - " .word 0xffff, 0x0000 \n" - " .byte 0, 0x9a, 0, 0 \n" - - /* selgdt 0x30 16-bit 64k data at 0x00000000 */ - " .word 0xffff, 0x0000 \n" - " .byte 0, 0x92, 0, 0 \n" - - "__mygdt_end: \n" -); - -/* Declare a pointer to where our idt is going to be i.e. at mem zero */ -__asm__ ("__myidt: \n" - /* 16-bit limit */ - " .word 1023 \n" - /* 24-bit base */ - " .long 0 \n" - " .word 0 \n" -); - -/* The address arguments to this function are PHYSICAL ADDRESSES */ -static void real_mode_switch_call_vga(unsigned long devfn) -{ - __asm__ __volatile__ ( - // paranoia -- does ecx get saved? not sure. This is - // the easiest safe thing to do. - " pushal \n" - /* save the stack */ - " mov %esp, __stack \n" - " jmp 1f \n" - "__stack: .long 0 \n" - "1:\n" - /* get devfn into %ecx */ - " movl %esp, %ebp \n" - " movl 8(%ebp), %ecx \n" - /* load 'our' gdt */ - " lgdt %cs:__mygdtaddr \n" - - /* This configures CS properly for real mode. */ - " ljmp $0x28, $__rms_16bit\n" - "__rms_16bit: \n" - " .code16 \n" - /* 16 bit code from here on... */ - - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax \n" - " movl %eax, %cr0 \n" - - /* Now really going into real mode */ - " ljmp $0, $__rms_real\n" - "__rms_real: \n" - - /* put the stack at the end of page zero. - * that way we can easily share it between real and protected, - * since the 16-bit ESP at segment 0 will work for any case. - */ - /* Setup a stack */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - " movl $0x1000, %eax \n" - " movl %eax, %esp \n" - - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - - /* Dump zeros in the other segregs */ - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov $0x40, %ax \n" - " mov %ax, %ds \n" - " mov %cx, %ax \n" - - /* run VGA BIOS at 0xc000:0003 */ - " lcall $0xc000, $0x0003\n" - - /* if we got here, just about done. - * Need to get back to protected mode */ - " movl %cr0, %eax \n" - " orl $0x0000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0 \n" - - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $vgarestart\n" - "vgarestart:\n" - " .code32\n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* restore proper gdt and idt */ - " lgdt %cs:gdtarg \n" - " lidt idtarg \n" - - ".globl vga_exit \n" - "vga_exit: \n" - " mov __stack, %esp \n" - " popal \n" - ); -} - -__asm__ (".text\n""real_mode_switch_end:\n"); -extern char real_mode_switch_end[]; - -/* call vga bios int 10 function 0x4f14 to enable main console - epia-m does not always autosence the main console so forcing it on is good !! */ -void vga_enable_console() -{ - __asm__ __volatile__ ( - /* paranoia -- does ecx get saved? not sure. This is - * the easiest safe thing to do. */ - " pushal \n" - /* save the stack */ - " mov %esp, __stack \n" - - /* load 'our' gdt */ - " lgdt %cs:__mygdtaddr \n" - - /* This configures CS properly for real mode. */ - " ljmp $0x28, $__vga_ec_16bit\n" - "__vga_ec_16bit: \n" - " .code16 \n" - /* 16 bit code from here on... */ - - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax\n" - " movl %eax, %cr0 \n" - - /* Now really going into real mode */ - " ljmp $0, $__vga_ec_real \n" - "__vga_ec_real: \n" - - /* put the stack at the end of page zero. - * that way we can easily share it between real and protected, - * since the 16-bit ESP at segment 0 will work for any case. - */ - /* Setup a stack */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - " movl $0x1000, %eax \n" - " movl %eax, %esp \n" - - /* debugging for RGM */ - " mov $0x11, %al \n" - " outb %al, $0x80 \n" - - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - - /* Dump zeros in the other segregs */ - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - - /* ask bios to enable main console */ - /* set up for int 10 call - values found from X server - * bios call routines */ - " movw $0x4f14,%ax \n" - " movw $0x8003,%bx \n" - " movw $1, %cx \n" - " movw $0, %dx \n" - " movw $0, %di \n" - " int $0x10 \n" - - " movb $0x55, %al \n" - " outb %al, $0x80 \n" - - /* if we got here, just about done. - * Need to get back to protected mode */ - " movl %cr0, %eax \n" - " orl $0x0000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0 \n" - - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $vga_ec_restart\n" - "vga_ec_restart:\n" - " .code32\n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* restore proper gdt and idt */ - " lgdt %cs:gdtarg \n" - " lidt idtarg \n" - " .globl vga__ec_exit \n" - "vga_ec_exit:\n" - " mov __stack, %esp \n" - " popal\n" - ); -} - -void do_vgabios(void) -{ - device_t dev; - unsigned long busdevfn; - unsigned char *rom; - unsigned char *buf; - unsigned int size = 64*1024; - int i; - - /* clear vga bios data area */ - for (i = 0x400; i < 0x500; i++) { - *(unsigned char *) i = 0; - } - - dev = dev_find_class(PCI_CLASS_DISPLAY_VGA<<8 , 0); - - if (!dev) { - printk(BIOS_DEBUG, "NO VGA FOUND\n"); - return; - } - printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device); - - /* declare rom address here - keep any config data out of the way - * of core LXB stuff */ - - rom = cbfs_load_optionrom(dev->vendor, dev->device, NULL); - pci_write_config32(dev, PCI_ROM_ADDRESS, (u32)rom | 1); - printk(BIOS_DEBUG, "rom base: %p\n", rom); - - buf = (unsigned char *) rom; - if ((buf[0] == 0x55) && (buf[1] == 0xaa)) { - memcpy((void *) 0xc0000, buf, size); - - write_protect_vgabios(); // in northbridge - - // check signature again - buf = (unsigned char *) 0xc0000; - if (buf[0]==0x55 && buf[1]==0xAA) { - busdevfn = (dev->bus->secondary << 8) | dev->path.pci.devfn; - printk(BIOS_DEBUG, "bus/devfn = %#lx\n", busdevfn); - - real_mode_switch_call_vga(busdevfn); - } else - printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n"); - } else - printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]); - - pci_write_config32(dev, PCI_ROM_ADDRESS, 0); -} - - -// we had hoped to avoid this. -// this is a stub IDT only. It's main purpose is to ignore calls -// to the BIOS. -// no longer. Dammit. We have to respond to these. -struct realidt { - unsigned short offset, cs; -}; - -// from a handy writeup that andrey found. - -// handler. -// There are some assumptions we can make here. -// First, the Top Of Stack (TOS) is located on the top of page zero. -// we can share this stack between real and protected mode. -// that simplifies a lot of things ... -// we'll just push all the registers on the stack as longwords, -// and pop to protected mode. -// second, since this only ever runs as part of coreboot, -// we know all the segment register values -- so we don't save any. -// keep the handler that calls things small. It can do a call to -// more complex code in coreboot itself. This helps a lot as we don't -// have to do address fixup in this little stub, and calls are absolute -// so the handler is relocatable. -void handler(void) -{ - __asm__ __volatile__ ( - " .code16 \n" - "idthandle: \n" - " pushal \n" - " movb $0, %al \n" - " ljmp $0, $callbiosint16\n" - "end_idthandle: \n" - " .code32 \n" - ); -} - -void debughandler(void) -{ - __asm__ __volatile__ ( - " .code16 \n" - "debughandle: \n" - " pushw %cx \n" - " movw $250, %cx \n" - "dbh1: \n" - " loop dbh1 \n" - " popw %cx \n" - " iret \n" - "end_debughandle: \n" - ".code32 \n" - ); -} - -// Calling conventions. The first C function is called with this stuff -// on the stack. They look like value parameters, but note that if you -// modify them they will go back to the INTx function modified. -// the C function will call the biosint function with these as -// REFERENCE parameters. In this way, we can easily get -// returns back to the INTx caller (i.e. vgabios) -void callbiosint(void) -{ - __asm__ __volatile__ ( - " .code16 \n" - "callbiosint16: \n" - " push %ds \n" - " push %es \n" - " push %fs \n" - " push %gs \n" - // clean up the int #. To save space we put it in the lower - // byte. But the top 24 bits are junk. - " andl $0xff, %eax\n" - // this push does two things: - // - put the INT # on the stack as a parameter - // - provides us with a temp for the %cr0 mods. - " pushl %eax \n" - " movl %cr0, %eax\n" - " orl $0x00000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0\n" - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $biosprotect\n" - "biosprotect: \n" - " .code32 \n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - " lidt idtarg \n" - " call biosint \n" - // back to real mode ... - " ljmp $0x28, $__rms_16bit2\n" - "__rms_16bit2: \n" - " .code16 \n" - /* 16 bit code from here on... */ - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax \n" - " movl %eax, %cr0 \n" - - /* Now really going into real mode */ - " ljmp $0, $__rms_real2 \n" - "__rms_real2: \n" - - /* Setup a stack - * FixME: where is esp? */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - - /* ebugging for RGM */ - " mov $0x11, %al \n" - " outb %al, $0x80 \n" - - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - - /* Dump zeros in the other segregs */ - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov $0x40, %ax \n" - " mov %ax, %ds \n" - - /* pop the INT # that you pushed earlier */ - " popl %eax \n" - " pop %gs \n" - " pop %fs \n" - " pop %es \n" - " pop %ds \n" - " popal \n" - " iret \n" - " .code32 \n" - ); -} - -enum { - PCIBIOS = 0x1a, - MEMSIZE = 0x12 -}; - -int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags); - -int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags - ); - -extern void vga_exit(void); - -int biosint(unsigned long intnumber, - unsigned long gsfs, unsigned long dses, - unsigned long edi, unsigned long esi, - unsigned long ebp, unsigned long esp, - unsigned long ebx, unsigned long edx, - unsigned long ecx, unsigned long eax, - unsigned long cs_ip, unsigned short stackflags) -{ - unsigned long ip; - unsigned long cs; - unsigned long flags; - int ret = -1; - - ip = cs_ip & 0xffff; - cs = cs_ip >> 16; - flags = stackflags; - - printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber); - printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", - eax, ebx, ecx, edx); - printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", - ebp, esp, edi, esi); - printk(BIOS_DEBUG, "biosint: ip 0x%lx cs 0x%lx flags 0x%lx\n", - ip, cs, flags); - - // cases in a good compiler are just as good as your own tables. - switch (intnumber) { - case 0 ... 15: - // These are not BIOS service, but the CPU-generated exceptions - printk(BIOS_INFO, "biosint: Oops, exception %lu\n", intnumber); - if (esp < 0x1000) { - printk(BIOS_DEBUG, "Stack contents: "); - while (esp < 0x1000) { - printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *) esp); - esp += 2; - } - printk(BIOS_DEBUG, "\n"); - } - printk(BIOS_DEBUG, "biosint: Bailing out\n"); - // "longjmp" - vga_exit(); - break; - - case PCIBIOS: - ret = pcibios( &edi, &esi, &ebp, &esp, - &ebx, &edx, &ecx, &eax, &flags); - break; - case MEMSIZE: - // who cares. - eax = 64 * 1024; - ret = 0; - break; - case 0x15: - ret=handleint21( &edi, &esi, &ebp, &esp, - &ebx, &edx, &ecx, &eax, &flags); - break; - default: - printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%lx\n", intnumber); - break; - } - if (ret) - flags |= 1; // carry flags - else - flags &= ~1; - stackflags = flags; - return ret; -} - - -void setup_realmode_idt(void) -{ - extern unsigned char idthandle, end_idthandle; - extern unsigned char debughandle, end_debughandle; - - int i; - struct realidt *idts = (struct realidt *) 0; - int codesize = &end_idthandle - &idthandle; - unsigned char *intbyte, *codeptr; - - // for each int, we create a customized little handler - // that just pushes %ax, puts the int # in %al, - // then calls the common interrupt handler. - // this necessitated because intel didn't know much about - // architecture when they did the 8086 (it shows) - // (hmm do they know anymore even now :-) - // obviously you can see I don't really care about memory - // efficiency. If I did I would probe back through the stack - // and get it that way. But that's really disgusting. - for (i = 0; i < 256; i++) { - idts[i].cs = 0; - codeptr = (unsigned char*) 4096 + i * codesize; - idts[i].offset = (unsigned) codeptr; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = i; - } - - // fixed entry points - - // VGA BIOSes tend to hardcode f000:f065 as the previous handler of - // int10. - // calling convention here is the same as INTs, we can reuse - // the int entry code. - codeptr = (unsigned char*) 0xff065; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = 0x42; /* int42 is the relocated int10 */ - - /* debug handler - useful to set a programmable delay between instructions if the - TF bit is set upon call to real mode */ - idts[1].cs = 0; - idts[1].offset = 16384; - memcpy((void *)16384, &debughandle, &end_debughandle - &debughandle); - - -} - - - -enum { - CHECK = 0xb001, - FINDDEV = 0xb102, - READCONFBYTE = 0xb108, - READCONFWORD = 0xb109, - READCONFDWORD = 0xb10a, - WRITECONFBYTE = 0xb10b, - WRITECONFWORD = 0xb10c, - WRITECONFDWORD = 0xb10d -}; - -// errors go in AH. Just set these up so that word assigns -// will work. KISS. -enum { - PCIBIOS_NODEV = 0x8600, - PCIBIOS_BADREG = 0x8700 -}; - -int -pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags) -{ - unsigned short func = (unsigned short) (*peax); - int retval = 0; - unsigned short devid, vendorid, devfn; - short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */ - unsigned char bus; - device_t dev; - - switch(func) { - case CHECK: - *pedx = 0x4350; - *pecx = 0x2049; - retval = 0; - break; - case FINDDEV: - { - devid = *pecx; - vendorid = *pedx; - devindex = *pesi; - dev = 0; - while ((dev = dev_find_device(vendorid, devid, dev))) { - if (devindex <= 0) - break; - devindex--; - } - if (dev) { - unsigned short busdevfn; - *peax = 0; - // busnum is an unsigned char; - // devfn is an int, so we mask it off. - busdevfn = (dev->bus->secondary << 8) - | (dev->path.pci.devfn & 0xff); - printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func, busdevfn); - *pebx = busdevfn; - retval = 0; - } else { - *peax = PCIBIOS_NODEV; - retval = -1; - } - } - break; - case READCONFDWORD: - case READCONFWORD: - case READCONFBYTE: - case WRITECONFDWORD: - case WRITECONFWORD: - case WRITECONFBYTE: - { - unsigned long dword; - unsigned short word; - unsigned char byte; - unsigned char reg; - - devfn = *pebx & 0xff; - bus = *pebx >> 8; - reg = *pedi; - dev = dev_find_slot(bus, devfn); - if (! dev) { - printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn); - // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn! - *peax = PCIBIOS_BADREG; - retval = -1; - } - switch(func) { - case READCONFBYTE: - byte = pci_read_config8(dev, reg); - *pecx = byte; - break; - case READCONFWORD: - word = pci_read_config16(dev, reg); - *pecx = word; - break; - case READCONFDWORD: - dword = pci_read_config32(dev, reg); - *pecx = dword; - break; - case WRITECONFBYTE: - byte = *pecx; - pci_write_config8(dev, reg, byte); - break; - case WRITECONFWORD: - word = *pecx; - pci_write_config16(dev, reg, word); - break; - case WRITECONFDWORD: - dword = *pecx; - pci_write_config32(dev, reg, dword); - break; - } - - if (retval) - retval = PCIBIOS_BADREG; - printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n", - func, bus, devfn, reg, *pecx); - *peax = 0; - retval = 0; - } - break; - default: - printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func); - break; - } - - return retval; -} - -int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp, - unsigned long *esp, unsigned long *ebx, unsigned long *edx, - unsigned long *ecx, unsigned long *eax, unsigned long *flags) -{ - int res=-1; - switch(*eax&0xffff) - { - case 0x5f19: - break; - case 0x5f18: - *eax=0x5f; - *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory - *ecx=0x060; - res=0; - break; - case 0x5f00: - *eax = 0x8600; - break; - case 0x5f01: - *eax = 0x5f; - *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 - res = 0; - break; - case 0x5f02: - *eax=0x5f; - *ebx= (*ebx & 0xffff0000) | 2; - *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only - *edx= (*edx & 0xffff0000) | 0; // TV Layout - default - res=0; - break; - case 0x5f0f: - *eax=0x860f; - break; - } - return res; -} diff --git a/src/northbridge/via/cn700/vgachip.h b/src/northbridge/via/cn700/vgachip.h deleted file mode 100644 index 038ffec3ec..0000000000 --- a/src/northbridge/via/cn700/vgachip.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef _PC80_VGABIOS -#define _PC80_VGABIOS - -extern struct chip_control pc80_vgabios_control; - -struct pc80_vgabios_config { - int nothing; -}; - -void vga_enable_console(void); -void do_vgabios(void); -void setup_realmode_idt(void); -void write_protect_vgabios(void); - -#endif /* _PC80_VGABIOS */ diff --git a/src/northbridge/via/cx700/Kconfig b/src/northbridge/via/cx700/Kconfig index 58e2047a14..916c4c3dc9 100644 --- a/src/northbridge/via/cx700/Kconfig +++ b/src/northbridge/via/cx700/Kconfig @@ -5,14 +5,35 @@ config NORTHBRIDGE_VIA_CX700 select IOAPIC select SMP -# this is done by the northbridge's vgabios.c already -config VGA_ROM_RUN - bool - default n +# TODO: What should be the per-chipset default value here? +choice + prompt "Onboard graphics" + default CX700_VIDEO_MB_32MB depends on NORTHBRIDGE_VIA_CX700 -config PCI_ROM_RUN - bool - default n +# TODO: Setting the amount of gfx memory is not yet supported in the source code. +config CX700_VIDEO_MB_OFF + bool "Disabled, 0KB" +config CX700_VIDEO_MB_8MB + bool "Enabled, 8MB" +config CX700_VIDEO_MB_16MB + bool "Enabled, 16MB" +config CX700_VIDEO_MB_32MB + bool "Enabled, 32MB" +config CX700_VIDEO_MB_64MB + bool "Enabled, 64MB" +config CX700_VIDEO_MB_128MB + bool "Enabled, 128MB" + +endchoice + +config VIDEO_MB + int + default 0 if CX700_VIDEO_MB_OFF + default 8 if CX700_VIDEO_MB_8MB + default 16 if CX700_VIDEO_MB_16MB + default 32 if CX700_VIDEO_MB_32MB + default 64 if CX700_VIDEO_MB_64MB + default 128 if CX700_VIDEO_MB_128MB depends on NORTHBRIDGE_VIA_CX700 diff --git a/src/northbridge/via/cx700/Makefile.inc b/src/northbridge/via/cx700/Makefile.inc index 85e984a443..1221fd5f8b 100644 --- a/src/northbridge/via/cx700/Makefile.inc +++ b/src/northbridge/via/cx700/Makefile.inc @@ -19,7 +19,6 @@ obj-y += cx700_reset.o obj-y += northbridge.o -obj-y += vgabios.o driver-y += cx700_agp.o driver-y += cx700_lpc.o diff --git a/src/northbridge/via/cx700/cx700_vga.c b/src/northbridge/via/cx700/cx700_vga.c index c259b376ad..88fac179f2 100644 --- a/src/northbridge/via/cx700/cx700_vga.c +++ b/src/northbridge/via/cx700/cx700_vga.c @@ -29,6 +29,7 @@ #include <cpu/cpu.h> #include <cpu/x86/mtrr.h> #include <cpu/x86/msr.h> +#include <arch/interrupt.h> #include "chip.h" #include "northbridge.h" @@ -41,9 +42,44 @@ #define CRTC_INDEX 0x3d4 #define CRTC_DATA 0x3d5 -void setup_realmode_idt(void); -void do_vgabios(void); -void vga_enable_console(void); +static int via_cx700_int15_handler(struct eregs *regs) +{ + int res=-1; + printk(BIOS_DEBUG, "via_cx700_int15_handler\n"); + switch(regs->eax & 0xffff) { + case 0x5f19: + break; + case 0x5f18: + regs->eax=0x5f; + regs->ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory + regs->ecx=0x060; + res=0; + break; + case 0x5f00: + regs->eax = 0x8600; + break; + case 0x5f01: + regs->eax = 0x5f; + regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 + res = 0; + break; + case 0x5f02: + regs->eax=0x5f; + regs->ebx= (regs->ebx & 0xffff0000) | 2; + regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only + regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default + res=0; + break; + case 0x5f0f: + regs->eax=0x860f; + break; + default: + printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", + regs->eax & 0xffff); + break; + } + return res; +} void write_protect_vgabios(void) { @@ -64,7 +100,7 @@ static void vga_init(device_t dev) { u8 reg8; - printk(BIOS_DEBUG, "Initializing VGA...\n"); + mainboard_interrupt_handlers(0x15, &via_cx700_int15_handler); //* pci_write_config8(dev, 0x04, 0x07); @@ -75,12 +111,16 @@ static void vga_init(device_t dev) pci_write_config8(dev, 0x3c, 0x0b); //*/ - printk(BIOS_DEBUG, "Executing VGA option rom in real mode\n"); - setup_realmode_idt(); - do_vgabios(); + printk(BIOS_DEBUG, "Initializing VGA...\n"); + + pci_dev_init(dev); + printk(BIOS_DEBUG, "Enable VGA console\n"); + // this is how it should look: + // call_bios_interrupt(0x10,0x4f1f,0x8003,1,0); + // this is how it looks: vga_enable_console(); - + /* It's not clear if these need to be programmed before or after * the VGA bios runs. Try both, clean up later */ /* Set memory rate to 200MHz */ diff --git a/src/northbridge/via/cx700/vgabios.c b/src/northbridge/via/cx700/vgabios.c deleted file mode 100644 index 59b3239204..0000000000 --- a/src/northbridge/via/cx700/vgabios.c +++ /dev/null @@ -1,782 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * (C) 2007-2009 coresystems GmbH - * (See further copyright notices below) - * - * NOTE: This file is supposed to go away once the generic vm86 handler - * in util/x86emu is able to handle intXX hooks like yabel does. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <console/console.h> -#include <device/pci.h> -#include <device/pci_ids.h> -#include <device/pci_ops.h> -#undef __KERNEL__ -#include <arch/io.h> -#include <string.h> -#include <cbfs.h> - -void write_protect_vgabios(void); - -/* vgabios.c. Derived from: */ - -/*------------------------------------------------------------ -*- C -*- - * 2 Kernel Monte a.k.a. Linux loading Linux on x86 - * - * Erik Arjan Hendriks <hendriks@lanl.gov> - * - * This version is a derivative of the original two kernel monte - * which is (C) 2000 Scyld. - * - * Copyright (C) 2000 Scyld Computing Corporation - * - * Portions related to the alpha architecture are: - * - * Copyright(C) 2001 University of California. LA-CC Number 01-67. - * This software has been authored by an employee or employees of the - * University of California, operator of the Los Alamos National - * Laboratory under Contract No. W-7405-ENG-36 with the U.S. - * Department of Energy. The U.S. Government has rights to use, - * reproduce, and distribute this software. If the software is - * modified to produce derivative works, such modified software should - * be clearly marked, so as not to confuse it with the version - * available from LANL. - * - * This software may be used and distributed according to the terms - * of the GNU General Public License, incorporated herein by - * reference to http://www.gnu.org/licenses/gpl.html. - * - * This software is provided by the author(s) "as is" and any express - * or implied warranties, including, but not limited to, the implied - * warranties of merchantability and fitness for a particular purpose - * are disclaimed. In no event shall the author(s) be liable for any - * direct, indirect, incidental, special, exemplary, or consequential - * damages (including, but not limited to, procurement of substitute - * goods or services; loss of use, data, or profits; or business - * interruption) however caused and on any theory of liability, - * whether in contract, strict liability, or tort (including - * negligence or otherwise) arising in any way out of the use of this - * software, even if advised of the possibility of such damage. - * - *--------------------------------------------------------------------*/ - -/* Modified to be a self sufficient plug in so that it can be used - without reliance on other parts of core Linuxbios - (C) 2005 Nick.Barker9@btinternet.com - - Used initially for epia-m where there are problems getting the bios - emulator to successfully run this bios. -*/ - -/* Declare a temporary global descriptor table - necessary because the - Core part of the bios no longer sets up any 16 bit segments */ -__asm__( - /* pointer to original gdt */ - "gdtarg: \n" - " .word gdt_limit \n" - " .long gdt \n" - /* compute the table limit */ - "__mygdt_limit = __mygdt_end - __mygdt - 1 \n" - "__mygdtaddr: \n" - " .word __mygdt_limit \n" - " .long __mygdt \n" - "__mygdt: \n" - /* selgdt 0, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - /* selgdt 8, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - /* selgdt 0x10, flat code segment */ - " .word 0xffff, 0x0000 \n" - " .byte 0x00, 0x9b, 0xcf, 0x00 \n" - /* selgdt 0x18, flat data segment */ - " .word 0xffff, 0x0000 \n" - " .byte 0x00, 0x93, 0xcf, 0x00 \n" - /* selgdt 0x20, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - /* selgdt 0x28 16-bit 64k code at 0x00000000 */ - " .word 0xffff, 0x0000 \n" - " .byte 0, 0x9a, 0, 0 \n" - /* selgdt 0x30 16-bit 64k data at 0x00000000 */ - " .word 0xffff, 0x0000 \n" - " .byte 0, 0x92, 0, 0 \n" - "__mygdt_end: \n"); - -/* Declare a pointer to where our idt is going to be i.e. at mem zero */ -__asm__("__myidt: \n" - /* 16-bit limit */ - " .word 1023 \n" - /* 24-bit base */ - " .long 0 \n" " .word 0 \n"); - -/* The address arguments to this function are PHYSICAL ADDRESSES */ -static void real_mode_switch_call_vga(unsigned long devfn) -{ - __asm__ __volatile__( - // paranoia -- does ecx get saved? not sure. This is - // the easiest safe thing to do. - " pushal \n" - /* save the stack */ - " mov %esp, __stack \n" - " jmp 1f \n" - "__stack: .long 0 \n" "1:\n" - /* get devfn into %ecx */ - " movl %esp, %ebp \n" - " movl 8(%ebp), %ecx \n" - /* load 'our' gdt */ - " lgdt %cs:__mygdtaddr \n" - /* This configures CS properly for real mode. */ - " ljmp $0x28, $__rms_16bit\n" - "__rms_16bit: \n" - " .code16 \n" - /* 16 bit code from here on... */ - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax \n" - " movl %eax, %cr0 \n" - /* Now really going into real mode */ - " ljmp $0, $__rms_real\n" - "__rms_real: \n" - /* put the stack at the end of page zero. - * that way we can easily share it between real and protected, - * since the 16-bit ESP at segment 0 will work for any case. - */ - /* Setup a stack */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - " movl $0x1000, %eax \n" - " movl %eax, %esp \n" - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - /* Dump zeros in the other segregs */ - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov $0x40, %ax \n" - " mov %ax, %ds \n" - " mov %cx, %ax \n" - /* run VGA BIOS at 0xc000:0003 */ - " lcall $0xc000, $0x0003\n" - /* if we got here, just about done. - * Need to get back to protected mode */ - " movl %cr0, %eax \n" " orl $0x0000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0 \n" - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $vgarestart\n" - "vgarestart:\n" - " .code32\n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* restore proper gdt and idt */ - " lgdt %cs:gdtarg \n" - " lidt idtarg \n" - ".globl vga_exit \n" - "vga_exit: \n" - " mov __stack, %esp \n" - " popal \n"); -} - -__asm__(".text\n" "real_mode_switch_end:\n"); -extern char real_mode_switch_end[]; - -/* call vga bios int 10 function 0x4f14 to enable main console - epia-m does not always autosence the main console so forcing it on is good !! */ -void vga_enable_console(void) -{ - __asm__ __volatile__( - /* paranoia -- does ecx get saved? not sure. This is - * the easiest safe thing to do. */ - " pushal \n" - /* save the stack */ - " mov %esp, __stack \n" - /* load 'our' gdt */ - " lgdt %cs:__mygdtaddr \n" - /* This configures CS properly for real mode. */ - " ljmp $0x28, $__vga_ec_16bit\n" - "__vga_ec_16bit: \n" - " .code16 \n" - /* 16 bit code from here on... */ - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax\n" - " movl %eax, %cr0 \n" - /* Now really going into real mode */ - " ljmp $0, $__vga_ec_real \n" - "__vga_ec_real: \n" - /* put the stack at the end of page zero. - * that way we can easily share it between real and protected, - * since the 16-bit ESP at segment 0 will work for any case. - */ - /* Setup a stack */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - " movl $0x1000, %eax \n" - " movl %eax, %esp \n" - /* debugging for RGM */ - " mov $0x11, %al \n" - " outb %al, $0x80 \n" - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - /* Dump zeros in the other segregs */ - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - /* ask bios to enable main console */ - /* set up for int 10 call - values found from X server - * bios call routines */ - " movw $0x4f14,%ax \n" - " movw $0x8003,%bx \n" - " movw $1, %cx \n" - " movw $0, %dx \n" - " movw $0, %di \n" - " int $0x10 \n" - " movb $0x55, %al \n" - " outb %al, $0x80 \n" - /* if we got here, just about done. - * Need to get back to protected mode */ - " movl %cr0, %eax \n" " orl $0x0000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0 \n" - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $vga_ec_restart\n" - "vga_ec_restart:\n" - " .code32\n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* restore proper gdt and idt */ - " lgdt %cs:gdtarg \n" - " lidt idtarg \n" - " .globl vga__ec_exit \n" - "vga_ec_exit:\n" - " mov __stack, %esp \n" - " popal\n"); -} - -void do_vgabios(void) -{ - device_t dev; - unsigned long busdevfn; - unsigned int rom = 0; - unsigned char *buf; - unsigned int size = 64 * 1024; - int i; - - /* clear vga bios data area */ - for (i = 0x400; i < 0x500; i++) { - *(unsigned char *)i = 0; - } - - dev = dev_find_class(PCI_CLASS_DISPLAY_VGA << 8, 0); - - if (!dev) { - printk(BIOS_DEBUG, "NO VGA FOUND\n"); - return; - } - printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device); - - /* declare rom address here - keep any config data out of the way - * of core LXB stuff */ - -#warning ROM address hardcoded to 512K - rom = (unsigned int)cbfs_load_optionrom(dev->vendor, dev->device, 0); - pci_write_config32(dev, PCI_ROM_ADDRESS, rom | 1); - printk(BIOS_DEBUG, "rom base, size: %x\n", rom); - - buf = (unsigned char *)rom; - if ((buf[0] == 0x55) && (buf[1] == 0xaa)) { - memcpy((void *)0xc0000, buf, size); - - write_protect_vgabios(); // in northbridge - - // check signature again - buf = (unsigned char *)0xc0000; - if (buf[0] == 0x55 && buf[1] == 0xAA) { - busdevfn = - (dev->bus->secondary << 8) | dev->path.pci.devfn; - printk(BIOS_DEBUG, "bus/devfn = %#lx\n", busdevfn); - - real_mode_switch_call_vga(busdevfn); - } else - printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n"); - } else - printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]); - - pci_write_config32(dev, PCI_ROM_ADDRESS, 0); -} - -// we had hoped to avoid this. -// this is a stub IDT only. It's main purpose is to ignore calls -// to the BIOS. -// no longer. Dammit. We have to respond to these. -struct realidt { - unsigned short offset, cs; -}; - -// from a handy writeup that andrey found. - -// handler. -// There are some assumptions we can make here. -// First, the Top Of Stack (TOS) is located on the top of page zero. -// we can share this stack between real and protected mode. -// that simplifies a lot of things ... -// we'll just push all the registers on the stack as longwords, -// and pop to protected mode. -// second, since this only ever runs as part of linuxbios, -// we know all the segment register values -- so we don't save any. -// keep the handler that calls things small. It can do a call to -// more complex code in linuxbios itself. This helps a lot as we don't -// have to do address fixup in this little stub, and calls are absolute -// so the handler is relocatable. -void handler(void) -{ - __asm__ __volatile__(" .code16 \n" - "idthandle: \n" - " pushal \n" - " movb $0, %al \n" - " ljmp $0, $callbiosint16\n" - "end_idthandle: \n" - " .code32 \n"); -} - -void debughandler(void) -{ - __asm__ __volatile__(" .code16 \n" - "debughandle: \n" - " pushw %cx \n" - " movw $250, %cx \n" - "dbh1: \n" - " loop dbh1 \n" - " popw %cx \n" - " iret \n" - "end_debughandle: \n" ".code32 \n"); -} - -// Calling conventions. The first C function is called with this stuff -// on the stack. They look like value parameters, but note that if you -// modify them they will go back to the INTx function modified. -// the C function will call the biosint function with these as -// REFERENCE parameters. In this way, we can easily get -// returns back to the INTx caller (i.e. vgabios) -void callbiosint(void) -{ - __asm__ __volatile__(" .code16 \n" - "callbiosint16: \n" - " push %ds \n" - " push %es \n" - " push %fs \n" " push %gs \n" - // clean up the int #. To save space we put it in the lower - // byte. But the top 24 bits are junk. - " andl $0xff, %eax\n" - // this push does two things: - // - put the INT # on the stack as a parameter - // - provides us with a temp for the %cr0 mods. - " pushl %eax \n" " movl %cr0, %eax\n" " orl $0x00000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0\n" - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $biosprotect\n" - "biosprotect: \n" - " .code32 \n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - " lidt idtarg \n" - " call biosint \n" - // back to real mode ... - " ljmp $0x28, $__rms_16bit2\n" - "__rms_16bit2: \n" - " .code16 \n" - /* 16 bit code from here on... */ - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax \n" - " movl %eax, %cr0 \n" - /* Now really going into real mode */ - " ljmp $0, $__rms_real2 \n" - "__rms_real2: \n" - /* Setup a stack - * FixME: where is esp? */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - /* ebugging for RGM */ - " mov $0x11, %al \n" - " outb %al, $0x80 \n" - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - /* Dump zeros in the other segregs */ - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov $0x40, %ax \n" - " mov %ax, %ds \n" - /* pop the INT # that you pushed earlier */ - " popl %eax \n" - " pop %gs \n" - " pop %fs \n" - " pop %es \n" - " pop %ds \n" - " popal \n" - " iret \n" - " .code32 \n"); -} - -enum { - PCIBIOS = 0x1a, - MEMSIZE = 0x12 -}; - -int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags); - -int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, - unsigned long *pflags); - -extern void vga_exit(void); - -int biosint(unsigned long intnumber, - unsigned long gsfs, unsigned long dses, - unsigned long edi, unsigned long esi, - unsigned long ebp, unsigned long esp, - unsigned long ebx, unsigned long edx, - unsigned long ecx, unsigned long eax, - unsigned long cs_ip, unsigned short stackflags) -{ - unsigned long ip; - unsigned long cs; - unsigned long flags; - int ret = -1; - - ip = cs_ip & 0xffff; - cs = cs_ip >> 16; - flags = stackflags; - - printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber); - printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", - eax, ebx, ecx, edx); - printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", - ebp, esp, edi, esi); - printk(BIOS_DEBUG, "biosint: ip 0x%lx cs 0x%lx flags 0x%lx\n", - ip, cs, flags); - - // cases in a good compiler are just as good as your own tables. - switch (intnumber) { - case 0 ... 15: - // These are not BIOS service, but the CPU-generated exceptions - printk(BIOS_INFO, "biosint: Oops, exception %lu\n", intnumber); - if (esp < 0x1000) { - printk(BIOS_DEBUG, "Stack contents: "); - while (esp < 0x1000) { - printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *)esp); - esp += 2; - } - printk(BIOS_DEBUG, "\n"); - } - printk(BIOS_DEBUG, "biosint: Bailing out\n"); - // "longjmp" - vga_exit(); - break; - - case PCIBIOS: - ret = pcibios(&edi, &esi, &ebp, &esp, - &ebx, &edx, &ecx, &eax, &flags); - break; - case MEMSIZE: - // who cares. - eax = 64 * 1024; - ret = 0; - break; - case 0x15: - ret = handleint21(&edi, &esi, &ebp, &esp, - &ebx, &edx, &ecx, &eax, &flags); - break; - default: - printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%lx\n", intnumber); - break; - } - if (ret) - flags |= 1; // carry flags - else - flags &= ~1; - stackflags = flags; - return ret; -} - -void setup_realmode_idt(void) -{ - extern unsigned char idthandle, end_idthandle; - extern unsigned char debughandle, end_debughandle; - - int i; - struct realidt *idts = (struct realidt *)0; - int codesize = &end_idthandle - &idthandle; - unsigned char *intbyte, *codeptr; - - // for each int, we create a customized little handler - // that just pushes %ax, puts the int # in %al, - // then calls the common interrupt handler. - // this necessitated because intel didn't know much about - // architecture when they did the 8086 (it shows) - // (hmm do they know anymore even now :-) - // obviously you can see I don't really care about memory - // efficiency. If I did I would probe back through the stack - // and get it that way. But that's really disgusting. - for (i = 0; i < 256; i++) { - idts[i].cs = 0; - codeptr = (unsigned char *)4096 + i * codesize; - idts[i].offset = (unsigned)codeptr; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = i; - } - - // fixed entry points - - // VGA BIOSes tend to hardcode f000:f065 as the previous handler of - // int10. - // calling convention here is the same as INTs, we can reuse - // the int entry code. - codeptr = (unsigned char *)0xff065; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = 0x42; /* int42 is the relocated int10 */ - - // VIA's VBIOS will call f000:f859 instead of sending int15. - codeptr = (unsigned char *)0xff859; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = 0x15; - - /* debug handler - useful to set a programmable delay between instructions if the - TF bit is set upon call to real mode */ - idts[1].cs = 0; - idts[1].offset = 16384; - memcpy((void *)16384UL, &debughandle, &end_debughandle - &debughandle); -} - -enum { - CHECK = 0xb001, - FINDDEV = 0xb102, - READCONFBYTE = 0xb108, - READCONFWORD = 0xb109, - READCONFDWORD = 0xb10a, - WRITECONFBYTE = 0xb10b, - WRITECONFWORD = 0xb10c, - WRITECONFDWORD = 0xb10d -}; - -// errors go in AH. Just set these up so that word assigns -// will work. KISS. -enum { - PCIBIOS_NODEV = 0x8600, - PCIBIOS_BADREG = 0x8700 -}; - -int -pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags) -{ - unsigned short func = (unsigned short)(*peax); - int retval = 0; - unsigned short devid, vendorid, devfn; - short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */ - unsigned char bus; - device_t dev; - - switch (func) { - case CHECK: - *pedx = 0x4350; - *pecx = 0x2049; - retval = 0; - break; - case FINDDEV: - { - devid = *pecx; - vendorid = *pedx; - devindex = *pesi; - dev = 0; - while ((dev = dev_find_device(vendorid, devid, dev))) { - if (devindex <= 0) - break; - devindex--; - } - if (dev) { - unsigned short busdevfn; - *peax = 0; - // busnum is an unsigned char; - // devfn is an int, so we mask it off. - busdevfn = (dev->bus->secondary << 8) - | (dev->path.pci.devfn & 0xff); - printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func, - busdevfn); - *pebx = busdevfn; - retval = 0; - } else { - *peax = PCIBIOS_NODEV; - retval = -1; - } - } - break; - case READCONFDWORD: - case READCONFWORD: - case READCONFBYTE: - case WRITECONFDWORD: - case WRITECONFWORD: - case WRITECONFBYTE: - { - unsigned long dword; - unsigned short word; - unsigned char byte; - unsigned char reg; - - devfn = *pebx & 0xff; - bus = *pebx >> 8; - reg = *pedi; - dev = dev_find_slot(bus, devfn); - if (!dev) { - printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n", - func, bus, devfn); - // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn! - *peax = PCIBIOS_BADREG; - retval = -1; - } - switch (func) { - case READCONFBYTE: - byte = pci_read_config8(dev, reg); - *pecx = byte; - break; - case READCONFWORD: - word = pci_read_config16(dev, reg); - *pecx = word; - break; - case READCONFDWORD: - dword = pci_read_config32(dev, reg); - *pecx = dword; - break; - case WRITECONFBYTE: - byte = *pecx; - pci_write_config8(dev, reg, byte); - break; - case WRITECONFWORD: - word = *pecx; - pci_write_config16(dev, reg, word); - break; - case WRITECONFDWORD: - dword = *pecx; - pci_write_config32(dev, reg, dword); - break; - } - - if (retval) - retval = PCIBIOS_BADREG; - printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n", - func, bus, devfn, reg, *pecx); - *peax = 0; - retval = 0; - } - break; - default: - printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func); - break; - } - - return retval; -} - -int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp, - unsigned long *esp, unsigned long *ebx, unsigned long *edx, - unsigned long *ecx, unsigned long *eax, unsigned long *flags) -{ - int res = -1; - switch (*eax & 0xffff) { - case 0x5f19: - break; - case 0x5f18: - *eax = 0x5f; - *ebx = 0x545; // MCLK = 133, 32M frame buffer, 256 M main memory - *ecx = 0x060; - res = 0; - break; - case 0x5f00: - *eax = 0x8600; - break; - case 0x5f01: - *eax = 0x5f; - *ecx = (*ecx & 0xffffff00) | 2; // panel type = 2 = 1024 * 768 - res = 0; - break; - case 0x5f02: - *eax = 0x5f; - *ebx = (*ebx & 0xffff0000) | 2; - *ecx = (*ecx & 0xffff0000) | 0x401; // PAL + crt only - *edx = (*edx & 0xffff0000) | 0; // TV Layout - default - res = 0; - break; - case 0x5f0f: - *eax = 0x860f; - break; - } - return res; -} diff --git a/src/northbridge/via/vx800/Kconfig b/src/northbridge/via/vx800/Kconfig index 12502074fa..e4234b9556 100644 --- a/src/northbridge/via/vx800/Kconfig +++ b/src/northbridge/via/vx800/Kconfig @@ -6,14 +6,3 @@ config FALLBACK_SIZE default 0 depends on NORTHBRIDGE_VIA_VX800 -# this is done by the northbridge's vgabios.c already -config VGA_ROM_RUN - bool - default n - depends on NORTHBRIDGE_VIA_VX800 - -config PCI_ROM_RUN - bool - default n - depends on NORTHBRIDGE_VIA_VX800 - diff --git a/src/northbridge/via/vx800/Makefile.inc b/src/northbridge/via/vx800/Makefile.inc index 30bfb7c59a..c44266d0c3 100644 --- a/src/northbridge/via/vx800/Makefile.inc +++ b/src/northbridge/via/vx800/Makefile.inc @@ -18,8 +18,6 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## -obj-y += vgabios.o - driver-y += northbridge.o driver-y += vga.o driver-y += vx800_lpc.o diff --git a/src/northbridge/via/vx800/vga.c b/src/northbridge/via/vx800/vga.c index ee010a0c8b..3897e010b5 100644 --- a/src/northbridge/via/vx800/vga.c +++ b/src/northbridge/via/vx800/vga.c @@ -32,9 +32,9 @@ #include <cpu/cpu.h> #include <cpu/x86/mtrr.h> #include <cpu/x86/msr.h> +#include <arch/interrupt.h> #include "chip.h" #include "northbridge.h" -#include "vgachip.h" /* PCI Domain 1 Device 0 Function 0 */ @@ -49,6 +49,83 @@ #define VIACONFIG_VGA_PCI_10 0xf8000008 #define VIACONFIG_VGA_PCI_14 0xfc000000 +static int via_vx800_int15_handler(struct eregs *regs) +{ + int res=-1; + printk(BIOS_DEBUG, "via_vx800_int15_handler\n"); + switch(regs->eax & 0xffff) { + case 0x5f19: + regs->eax=0x5f; + regs->ecx=0x03; + res=0; + break; + case 0x5f18: + { + /* + * BL Bit[7:4] + * Memory Data Rate + * 0000: 66MHz + * 0001: 100MHz + * 0010: 133MHz + * 0011: 200MHz ( DDR200 ) + * 0100: 266MHz ( DDR266 ) + * 0101: 333MHz ( DDR333 ) + * 0110: 400MHz ( DDR400 ) + * 0111: 533MHz ( DDR I/II 533 + * 1000: 667MHz ( DDR I/II 667) + * Bit[3:0] + * N: Frame Buffer Size 2^N MB + */ + u8 i; + device_t dev; + dev = dev_find_slot(0, PCI_DEVFN(0, 3)); + i = pci_read_config8(dev, 0xa1); + i = (i & 0x70); + i = i >> 4; + if (i == 0) { + regs->eax = 0x00; //not support 5f18 + break; + } + i = i + 2; + regs->ebx = (u32) i; + i = pci_read_config8(dev, 0x90); + i = (i & 0x07); + i = i + 3; + i = i << 4; + regs->ebx = regs->ebx + ((u32) i); + regs->eax = 0x5f; + res = 0; + break; + } + case 0x5f00: + regs->eax = 0x005f; + res = 0; + break; + case 0x5f01: + regs->eax = 0x5f; + regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 + res = 0; + break; + case 0x5f02: + regs->eax=0x5f; + regs->ebx= (regs->ebx & 0xffff0000) | 2; + regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only + regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default + res=0; + break; + case 0x5f0f: + regs->eax = 0x005f; + res = 0; + break; + default: + printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", + regs->eax & 0xffff); + regs->eax = 0; + break; + } + return res; +} + void write_protect_vgabios(void) { device_t dev; @@ -70,12 +147,12 @@ static void vga_init(device_t dev) { uint8_t reg8; - print_debug("Initiailizing VGA...\n"); - u8 tmp8; -//A20 OPEN - tmp8 = inb(0x92); - tmp8 = tmp8 | 2; - outb(tmp8, 0x92); + mainboard_interrupt_handlers(0x15, &via_vx800_int15_handler); + + //A20 OPEN + reg8 = inb(0x92); + reg8 = reg8 | 2; + outb(reg8, 0x92); //* //pci_write_config8(dev, 0x04, 0x07); @@ -85,27 +162,17 @@ static void vga_init(device_t dev) pci_write_config32(dev, 0x14, VIACONFIG_VGA_PCI_14); pci_write_config8(dev, 0x3c, 0x0a); //same with vx855_lpc.c //*/ - printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__); -#if 1 - printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n"); - setup_realmode_idt(); - printk(BIOS_DEBUG, "DO THE VGA BIOS\n"); + printk(BIOS_DEBUG, "Initializing VGA...\n"); + + pci_dev_init(dev); + + printk(BIOS_DEBUG, "Enable VGA console\n"); + // this is how it should look: + // call_bios_interrupt(0x10,0x4f1f,0x8003,1,0); + // this is how it looks: + vga_enable_console(); - do_vgabios(); - if ((acpi_sleep_type == 3)/* || (PAYLOAD_IS_SEABIOS == 0)*/) { - printk(BIOS_DEBUG, "Enable VGA console\n"); - // remove this function since in cn700 it is said "VGA seems to work without this, but crash & burn with it" - //but the existense of vga_enable_console() seems do not hurt my coreboot. XP+ubuntu s3 can resume with and without this function. - //and remove it also do not help my s3 problem: desktop screen have some thin black line, after resuming back to win. - vga_enable_console(); - } -#else -/* Attempt to manually force the rom to load */ - printk(BIOS_DEBUG, "Forcing rom load\n"); - pci_rom_load(dev, 0xfff80000); - run_bios(dev, 0xc0000); -#endif if ((acpi_sleep_type == 3)/* || (PAYLOAD_IS_SEABIOS == 0)*/) { /* It's not clear if these need to be programmed before or after * the VGA bios runs. Try both, clean up later */ @@ -117,13 +184,13 @@ static void vga_init(device_t dev) outb(0x3d, CRTM_INDEX); outb(reg8, CRTM_DATA); +#if 0 /* Set framebuffer size to CONFIG_VIDEO_MB mb */ - /*reg8 = (CONFIG_VIDEO_MB/4); - outb(0x39, SR_INDEX); - outb(reg8, SR_DATA); */ + reg8 = (CONFIG_VIDEO_MB/4); + outb(0x39, SR_INDEX); + outb(reg8, SR_DATA); +#endif } - printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__); - } static struct device_operations vga_operations = { diff --git a/src/northbridge/via/vx800/vgabios.c b/src/northbridge/via/vx800/vgabios.c deleted file mode 100644 index 9425403afd..0000000000 --- a/src/northbridge/via/vx800/vgabios.c +++ /dev/null @@ -1,839 +0,0 @@ -#include <console/console.h> -#include <device/pci.h> -#include <device/pci_ids.h> -#include <device/pci_ops.h> -#undef __KERNEL__ -#include <arch/io.h> -#include <string.h> -#include "vgachip.h" -#include <cbfs.h> - -/* vgabios.c. Derived from: */ - -/*------------------------------------------------------------ -*- C -*- - * 2 Kernel Monte a.k.a. Linux loading Linux on x86 - * - * Erik Arjan Hendriks <hendriks@lanl.gov> - * - * This version is a derivative of the original two kernel monte - * which is (C) 2000 Scyld. - * - * Copyright (C) 2000 Scyld Computing Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. - * - * Portions related to the alpha architecture are: - * - * Copyright(C) 2001 University of California. LA-CC Number 01-67. - * This software has been authored by an employee or employees of the - * University of California, operator of the Los Alamos National - * Laboratory under Contract No. W-7405-ENG-36 with the U.S. - * Department of Energy. The U.S. Government has rights to use, - * reproduce, and distribute this software. If the software is - * modified to produce derivative works, such modified software should - * be clearly marked, so as not to confuse it with the version - * available from LANL. - * - * This software may be used and distributed according to the terms - * of the GNU General Public License, incorporated herein by - * reference to http://www.gnu.org/licenses/gpl.html. - * - * This software is provided by the author(s) "as is" and any express - * or implied warranties, including, but not limited to, the implied - * warranties of merchantability and fitness for a particular purpose - * are disclaimed. In no event shall the author(s) be liable for any - * direct, indirect, incidental, special, exemplary, or consequential - * damages (including, but not limited to, procurement of substitute - * goods or services; loss of use, data, or profits; or business - * interruption) however caused and on any theory of liability, - * whether in contract, strict liability, or tort (including - * negligence or otherwise) arising in any way out of the use of this - * software, even if advised of the possibility of such damage. - * - * $Id: vgabios.c,v 1.5 2004/10/06 17:33:52 rminnich Exp $ - *--------------------------------------------------------------------*/ - -/* Modified to be a self sufficient plug in so that it can be used - without reliance on other parts of coreboot's core - (C) 2005 Nick.Barker9@btinternet.com - - Used initially for epia-m where there are problems getting the bios - emulator to successfully run this bios. -*/ -/* Declare a temporary global descriptor table - necessary because the - Core part of the bios no longer sets up any 16 bit segments */ -__asm__( - /* pointer to original gdt */ - "gdtarg: \n" - " .word gdt_limit \n" - " .long gdt \n" - /* compute the table limit */ - "__mygdt_limit = __mygdt_end - __mygdt - 1 \n" - "__mygdtaddr: \n" - " .word __mygdt_limit \n" - " .long __mygdt \n" - "__mygdt: \n" - /* selgdt 0, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - /* selgdt 8, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - /* selgdt 0x10, flat code segment */ - " .word 0xffff, 0x0000 \n" - " .byte 0x00, 0x9b, 0xcf, 0x00 \n" - /* selgdt 0x18, flat data segment */ - " .word 0xffff, 0x0000 \n" - " .byte 0x00, 0x93, 0xcf, 0x00 \n" - /* selgdt 0x20, unused */ - " .word 0x0000, 0x0000 \n" - " .byte 0x00, 0x00, 0x00, 0x00 \n" - /* selgdt 0x28 16-bit 64k code at 0x00000000 */ - " .word 0xffff, 0x0000 \n" - " .byte 0, 0x9a, 0, 0 \n" - /* selgdt 0x30 16-bit 64k data at 0x00000000 */ - " .word 0xffff, 0x0000 \n" - " .byte 0, 0x92, 0, 0 \n" - "__mygdt_end: \n"); - -/* Declare a pointer to where our idt is going to be i.e. at mem zero */ -__asm__("__myidt: \n" - /* 16-bit limit */ - " .word 1023 \n" - /* 24-bit base */ - " .long 0 \n" " .word 0 \n"); - -/* The address arguments to this function are PHYSICAL ADDRESSES */ -extern u8 acpi_sleep_type; - -static void real_mode_switch_call_vga(unsigned long devfn) -{ - if ((acpi_sleep_type == 0)/* && (PAYLOAD_IS_SEABIOS == 1)*/) - return; - __asm__ __volatile__( - // paranoia -- does ecx get saved? not sure. This is - // the easiest safe thing to do. - " pushal \n" - /* save the stack */ - " mov %esp, __stack \n" - " jmp 1f \n" - "__stack: .long 0 \n" "1:\n" - /* get devfn into %ecx */ - " movl %esp, %ebp \n" - " movl 8(%ebp), %ecx \n" - /* load 'our' gdt */ - " lgdt %cs:__mygdtaddr \n" - /* This configures CS properly for real mode. */ - " ljmp $0x28, $__rms_16bit\n" - "__rms_16bit: \n" - " .code16 \n" - /* 16 bit code from here on... */ - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax \n" - " movl %eax, %cr0 \n" - /* Now really going into real mode */ - " ljmp $0, $__rms_real\n" - "__rms_real: \n" - /* put the stack at the end of page zero. - * that way we can easily share it between real and protected, - * since the 16-bit ESP at segment 0 will work for any case. - */ - /* Setup a stack */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - " movl $0x1000, %eax \n" - " movl %eax, %esp \n" - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - /* Dump zeros in the other segregs */ - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov $0x40, %ax \n" - " mov %ax, %ds \n" - " mov %cx, %ax \n" - /* run VGA BIOS at 0xc000:0003 */ - " lcall $0xc000, $0x0003\n" - /* if we got here, just about done. - * Need to get back to protected mode */ - " movl %cr0, %eax \n" " orl $0x0000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0 \n" - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $vgarestart\n" - "vgarestart:\n" - " .code32\n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* restore proper gdt and idt */ - " lgdt %cs:gdtarg \n" - " lidt idtarg \n" - ".globl vga_exit \n" - "vga_exit: \n" - " mov __stack, %esp \n" - " popal \n"); -} - -__asm__(".text\n" "real_mode_switch_end:\n"); -extern char real_mode_switch_end[]; - -/* call vga bios int 10 function 0x4f14 to enable main console - epia-m does not always autosence the main console so forcing it on is good !! */ -void vga_enable_console() -{ - if ((acpi_sleep_type == 0)/* && (PAYLOAD_IS_SEABIOS == 1)*/) - return; - __asm__ __volatile__( - /* paranoia -- does ecx get saved? not sure. This is - * the easiest safe thing to do. */ - " pushal \n" - /* save the stack */ - " mov %esp, __stack \n" - /* load 'our' gdt */ - " lgdt %cs:__mygdtaddr \n" - /* This configures CS properly for real mode. */ - " ljmp $0x28, $__vga_ec_16bit\n" - "__vga_ec_16bit: \n" - " .code16 \n" - /* 16 bit code from here on... */ - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax\n" - " movl %eax, %cr0 \n" - /* Now really going into real mode */ - " ljmp $0, $__vga_ec_real \n" - "__vga_ec_real: \n" - /* put the stack at the end of page zero. - * that way we can easily share it between real and protected, - * since the 16-bit ESP at segment 0 will work for any case. - */ - /* Setup a stack */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - " movl $0x1000, %eax \n" - " movl %eax, %esp \n" - /* debugging for RGM */ - " mov $0x11, %al \n" - " outb %al, $0x80 \n" - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - /* Dump zeros in the other segregs */ - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - /* ask bios to enable main console */ - /* set up for int 10 call - values found from X server - * bios call routines */ - " movw $0x4f14,%ax \n" - " movw $0x8003,%bx \n" - " movw $1, %cx \n" - " movw $0, %dx \n" - " movw $0, %di \n" - " int $0x10 \n" - " movb $0x55, %al \n" - " outb %al, $0x80 \n" - /* if we got here, just about done. - * Need to get back to protected mode */ - " movl %cr0, %eax \n" " orl $0x0000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0 \n" - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $vga_ec_restart\n" - "vga_ec_restart:\n" - " .code32\n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* restore proper gdt and idt */ - " lgdt %cs:gdtarg \n" - " lidt idtarg \n" - " .globl vga__ec_exit \n" - "vga_ec_exit:\n" - " mov __stack, %esp \n" - " popal\n"); -} - -void do_vgabios(void) -{ - device_t dev; - unsigned long busdevfn; - u32 rom; - unsigned char *buf; - unsigned int size = 64 * 1024; - int i; - - printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__); - - /* clear vga bios data area */ - for (i = 0x400; i < 0x500; i++) { - *(unsigned char *)i = 0; - } - - dev = dev_find_class(PCI_CLASS_DISPLAY_VGA << 8, 0); - - if (!dev) { - printk(BIOS_DEBUG, "NO VGA FOUND\n"); - return; - } - printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device); - - /* declare rom address here - keep any config data out of the way - * of core LXB stuff */ - - rom = (u32)cbfs_load_optionrom(dev->vendor, dev->device, 0); - pci_write_config32(dev, PCI_ROM_ADDRESS, rom | 1); - printk(BIOS_DEBUG, "rom base: %x\n", rom); - buf = (unsigned char *)rom; - printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__); - - if ((buf[0] == 0x55) && (buf[1] == 0xaa)) { - memcpy((void *)0xc0000, buf, size); - - printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__); - - write_protect_vgabios(); // in northbridge - - // check signature again - buf = (unsigned char *)0xc0000; - if (buf[0] == 0x55 && buf[1] == 0xAA) { - busdevfn = - (dev->bus->secondary << 8) | dev->path.pci.devfn; - printk(BIOS_DEBUG, "bus/devfn = %#lx\n", busdevfn); - real_mode_switch_call_vga(busdevfn); - } else - printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n"); - } else - printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]); - - printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__); - - pci_write_config32(dev, PCI_ROM_ADDRESS, 0); -} - -// we had hoped to avoid this. -// this is a stub IDT only. It's main purpose is to ignore calls -// to the BIOS. -// no longer. Dammit. We have to respond to these. -struct realidt { - unsigned short offset, cs; -}; - -// from a handy writeup that andrey found. - -// handler. -// There are some assumptions we can make here. -// First, the Top Of Stack (TOS) is located on the top of page zero. -// we can share this stack between real and protected mode. -// that simplifies a lot of things ... -// we'll just push all the registers on the stack as longwords, -// and pop to protected mode. -// second, since this only ever runs as part of coreboot, -// we know all the segment register values -- so we don't save any. -// keep the handler that calls things small. It can do a call to -// more complex code in coreboot itself. This helps a lot as we don't -// have to do address fixup in this little stub, and calls are absolute -// so the handler is relocatable. -void handler(void) -{ - __asm__ __volatile__(" .code16 \n" - "idthandle: \n" - " pushal \n" - " movb $0, %al \n" - " ljmp $0, $callbiosint16\n" - "end_idthandle: \n" - " .code32 \n"); -} - -void debughandler(void) -{ - __asm__ __volatile__(" .code16 \n" - "debughandle: \n" - " pushw %cx \n" - " movw $250, %cx \n" - "dbh1: \n" - " loop dbh1 \n" - " popw %cx \n" - " iret \n" - "end_debughandle: \n" ".code32 \n"); -} - -// Calling conventions. The first C function is called with this stuff -// on the stack. They look like value parameters, but note that if you -// modify them they will go back to the INTx function modified. -// the C function will call the biosint function with these as -// REFERENCE parameters. In this way, we can easily get -// returns back to the INTx caller (i.e. vgabios) -void callbiosint(void) -{ - __asm__ __volatile__(" .code16 \n" - "callbiosint16: \n" - " push %ds \n" - " push %es \n" - " push %fs \n" " push %gs \n" - // clean up the int #. To save space we put it in the lower - // byte. But the top 24 bits are junk. - " andl $0xff, %eax\n" - // this push does two things: - // - put the INT # on the stack as a parameter - // - provides us with a temp for the %cr0 mods. - " pushl %eax \n" " movl %cr0, %eax\n" " orl $0x00000001, %eax\n" /* PE = 1 */ - " movl %eax, %cr0\n" - /* Now that we are in protected mode jump to a 32 bit code segment. */ - " data32 ljmp $0x10, $biosprotect\n" - "biosprotect: \n" - " .code32 \n" - " movw $0x18, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - " lidt idtarg \n" - " call biosint \n" - // back to real mode ... - " ljmp $0x28, $__rms_16bit2\n" - "__rms_16bit2: \n" - " .code16 \n" - /* 16 bit code from here on... */ - /* Load the segment registers w/ properly configured segment - * descriptors. They will retain these configurations (limits, - * writability, etc.) once protected mode is turned off. */ - " mov $0x30, %ax \n" - " mov %ax, %ds \n" - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov %ax, %ss \n" - /* Turn off protection (bit 0 in CR0) */ - " movl %cr0, %eax \n" - " andl $0xFFFFFFFE, %eax \n" - " movl %eax, %cr0 \n" - /* Now really going into real mode */ - " ljmp $0, $__rms_real2 \n" - "__rms_real2: \n" - /* Setup a stack - * FixME: where is esp? */ - " mov $0x0, %ax \n" - " mov %ax, %ss \n" - /* ebugging for RGM */ - " mov $0x11, %al \n" - " outb %al, $0x80 \n" - /* Load our 16 it idt */ - " xor %ax, %ax \n" - " mov %ax, %ds \n" - " lidt __myidt \n" - /* Dump zeros in the other segregs */ - " mov %ax, %es \n" - " mov %ax, %fs \n" - " mov %ax, %gs \n" - " mov $0x40, %ax \n" - " mov %ax, %ds \n" - /* pop the INT # that you pushed earlier */ - " popl %eax \n" - " pop %gs \n" - " pop %fs \n" - " pop %es \n" - " pop %ds \n" - " popal \n" - " iret \n" - " .code32 \n"); -} - -enum { - PCIBIOS = 0x1a, - MEMSIZE = 0x12 -}; - -int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags); - -int handleint21(unsigned long *pedi, unsigned long *pesi, - unsigned long *pebp, unsigned long *pesp, - unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, - unsigned long *pflags); - -extern void vga_exit(void); - -int biosint(unsigned long intnumber, - unsigned long gsfs, unsigned long dses, - unsigned long edi, unsigned long esi, - unsigned long ebp, unsigned long esp, - unsigned long ebx, unsigned long edx, - unsigned long ecx, unsigned long eax, - unsigned long cs_ip, unsigned short stackflags) -{ - unsigned long ip; - unsigned long cs; - unsigned long flags; - int ret = -1; - - ip = cs_ip & 0xffff; - cs = cs_ip >> 16; - flags = stackflags; - - printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber); - printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", - eax, ebx, ecx, edx); - printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", - ebp, esp, edi, esi); - printk(BIOS_DEBUG, "biosint: ip 0x%lx cs 0x%lx flags 0x%lx\n", - ip, cs, flags); - - // cases in a good compiler are just as good as your own tables. - switch (intnumber) { - case 0: case 1: case 2: case 3: case 4: case 5: - case 6: case 7: case 8: case 9: case 10: - case 11: case 12: case 13: case 14: case 15: - // These are not BIOS service, but the CPU-generated exceptions - printk(BIOS_INFO, "biosint: Oops, exception %lu\n", intnumber); - if (esp < 0x1000) { - printk(BIOS_DEBUG, "Stack contents: "); - while (esp < 0x1000) { - printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *)esp); - esp += 2; - } - printk(BIOS_DEBUG, "\n"); - } - printk(BIOS_DEBUG, "biosint: Bailing out\n"); - // "longjmp" - if ((acpi_sleep_type == 3)/* || (PAYLOAD_IS_SEABIOS == 0)*/) // add this to keep same with kevin's seabios patch in 2008-9-8 - vga_exit(); - break; - - case PCIBIOS: - ret = pcibios(&edi, &esi, &ebp, &esp, - &ebx, &edx, &ecx, &eax, &flags); - break; - case MEMSIZE: - // who cares. - eax = 64 * 1024; - ret = 0; - break; - case 0x15: - ret = handleint21(&edi, &esi, &ebp, &esp, - &ebx, &edx, &ecx, &eax, &flags); - break; - default: - printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%lx\n", intnumber); - break; - } - if (ret) - flags |= 1; // carry flags - else - flags &= ~1; - stackflags = flags; - return ret; -} - -void setup_realmode_idt(void) -{ - extern unsigned char idthandle, end_idthandle; - extern unsigned char debughandle, end_debughandle; - - int i; - struct realidt *idts = (struct realidt *)0; - int codesize = &end_idthandle - &idthandle; - unsigned char *intbyte, *codeptr; - - // for each int, we create a customized little handler - // that just pushes %ax, puts the int # in %al, - // then calls the common interrupt handler. - // this necessitated because intel didn't know much about - // architecture when they did the 8086 (it shows) - // (hmm do they know anymore even now :-) - // obviously you can see I don't really care about memory - // efficiency. If I did I would probe back through the stack - // and get it that way. But that's really disgusting. - for (i = 0; i < 256; i++) { - idts[i].cs = 0; - codeptr = (char *)4096 + i * codesize; - idts[i].offset = (unsigned)codeptr; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = i; - } - - // fixed entry points - - // VGA BIOSes tend to hardcode f000:f065 as the previous handler of - // int10. - // calling convention here is the same as INTs, we can reuse - // the int entry code. - codeptr = (char *)0xff065; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = 0x42; /* int42 is the relocated int10 */ -/* - Fixed entry points - VBIOS will call f000:f859 instead of sending int15. - calling convertion here is the same as INTs, we can reuse the int entry code. -*/ - codeptr = (char *)0xff859; - memcpy(codeptr, &idthandle, codesize); - intbyte = codeptr + 3; - *intbyte = 0x15; - - /* debug handler - useful to set a programmable delay between instructions if the - TF bit is set upon call to real mode */ - idts[1].cs = 0; - idts[1].offset = 16384; - memcpy((void *)16384, &debughandle, &end_debughandle - &debughandle); - -} - -enum { - CHECK = 0xb001, - FINDDEV = 0xb102, - READCONFBYTE = 0xb108, - READCONFWORD = 0xb109, - READCONFDWORD = 0xb10a, - WRITECONFBYTE = 0xb10b, - WRITECONFWORD = 0xb10c, - WRITECONFDWORD = 0xb10d -}; - -// errors go in AH. Just set these up so that word assigns -// will work. KISS. -enum { - PCIBIOS_NODEV = 0x8600, - PCIBIOS_BADREG = 0x8700 -}; - -int -pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, - unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, - unsigned long *pecx, unsigned long *peax, unsigned long *pflags) -{ - unsigned long eax = *peax; - unsigned short func = (unsigned short)eax; - int retval = 0; - unsigned short devid, vendorid, devfn; - short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */ - unsigned char bus; - device_t dev; - - switch (func) { - case CHECK: - *pedx = 0x4350; - *pecx = 0x2049; - retval = 0; - break; - case FINDDEV: - { - devid = *pecx; - vendorid = *pedx; - devindex = *pesi; - dev = 0; - while ((dev = dev_find_device(vendorid, devid, dev))) { - if (devindex <= 0) - break; - devindex--; - } - if (dev) { - unsigned short busdevfn; - *peax = 0; - // busnum is an unsigned char; - // devfn is an int, so we mask it off. - busdevfn = (dev->bus->secondary << 8) - | (dev->path.pci.devfn & 0xff); - printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func, - busdevfn); - *pebx = busdevfn; - retval = 0; - } else { - *peax = PCIBIOS_NODEV; - retval = -1; - } - } - break; - case READCONFDWORD: - case READCONFWORD: - case READCONFBYTE: - case WRITECONFDWORD: - case WRITECONFWORD: - case WRITECONFBYTE: - { - unsigned long dword; - unsigned short word; - unsigned char byte; - unsigned char reg; - - devfn = *pebx & 0xff; - bus = *pebx >> 8; - reg = *pedi; - dev = dev_find_slot(bus, devfn); - if (!dev) { - printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n", - func, bus, devfn); - // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn! - *peax = PCIBIOS_BADREG; - retval = -1; - } - switch (func) { - case READCONFBYTE: - byte = pci_read_config8(dev, reg); - *pecx = byte; - break; - case READCONFWORD: - word = pci_read_config16(dev, reg); - *pecx = word; - break; - case READCONFDWORD: - dword = pci_read_config32(dev, reg); - *pecx = dword; - break; - case WRITECONFBYTE: - byte = *pecx; - pci_write_config8(dev, reg, byte); - break; - case WRITECONFWORD: - word = *pecx; - pci_write_config16(dev, reg, word); - break; - case WRITECONFDWORD: - dword = *pecx; - pci_write_config32(dev, reg, dword); - break; - } - - if (retval) - retval = PCIBIOS_BADREG; - printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n", - func, bus, devfn, reg, *pecx); - *peax = 0; - retval = 0; - } - break; - default: - printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func); - break; - } - - return retval; -} - -/* return value of int0x15(int21) -AH AL Completion status -?? 5Fh Function call supported -?? !=5Fh Function not supported -00 5Fh Function call successful -01 5Fh Function call failed -*/ -int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp, - unsigned long *esp, unsigned long *ebx, unsigned long *edx, - unsigned long *ecx, unsigned long *eax, unsigned long *flags) -{ - int res = -1; - switch (*eax & 0xffff) { - case 0x5f19: - *eax = 0x5f; - *ecx = 0x3; - res = 0; - break; - case 0x5f18: - { - /* - BL - Bit[7:4] - Memory Data Rate - 0000: 66MHz - 0001: 100MHz - 0010: 133MHz - 0011: 200MHz ( DDR200 ) - 0100: 266MHz ( DDR266 ) - 0101: 333MHz ( DDR333 ) - 0110: 400MHz ( DDR400 ) - 0111: 533MHz ( DDR I/II 533 - 1000: 667MHz ( DDR I/II 667) - Bit[3:0] - N: Frame Buffer Size 2^N MB - */ - u8 i; - device_t dev; - dev = dev_find_slot(0, PCI_DEVFN(0, 3)); - i = pci_read_config8(dev, 0xa1); - i = (i & 0x70); - i = i >> 4; - if (i == 0) { - *eax = 0x00; //not support 5f18 - break; - } - i = i + 2; - *ebx = (u32) i; - i = pci_read_config8(dev, 0x90); - i = (i & 0x07); - i = i + 3; - i = i << 4; - *ebx = (*ebx) + ((u32) i); - *eax = 0x5f; - res = 0; - break; - } - case 0x5f00: - *eax = 0x005f; - res = 0; - break; - case 0x5f01: - *eax = 0x5f; - *ecx = (*ecx & 0xffffff00) | 2; // panel type = 2 = 1024 * 768 - res = 0; - break; - case 0x5f02: - *eax = 0x5f; - *ebx = (*ebx & 0xffff0000) | 2; - *ecx = (*ecx & 0xffff0000) | 0x401; // PAL + crt only - *edx = (*edx & 0xffff0000) | 0; // TV Layout - default - res = 0; - break; - case 0x5f0f: - *eax = 0x005f; - res = 0; - break; - default: - *eax = 0; - break; - } - return res; -} diff --git a/src/northbridge/via/vx800/vgachip.h b/src/northbridge/via/vx800/vgachip.h deleted file mode 100644 index 1e17d90f66..0000000000 --- a/src/northbridge/via/vx800/vgachip.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef _PC80_VGABIOS -#define _PC80_VGABIOS - -extern struct chip_control pc80_vgabios_control; - -struct pc80_vgabios_config { - int nothing; -}; - -void vga_enable_console(void); -void do_vgabios(void); -void setup_realmode_idt(void); -void write_protect_vgabios(void); - -#endif /* _PC80_VGABIOS */ |