diff options
| -rw-r--r-- | src/mainboard/emulation/qemu-i386/Config.lb | 1 | ||||
| -rw-r--r-- | src/mainboard/emulation/qemu-i386/mainboard.c | 32 | ||||
| -rw-r--r-- | src/mainboard/emulation/qemu-i386/vgabios.c | 838 | ||||
| -rw-r--r-- | targets/emulation/qemu-i386/Config.lb | 4 |
4 files changed, 873 insertions, 2 deletions
diff --git a/src/mainboard/emulation/qemu-i386/Config.lb b/src/mainboard/emulation/qemu-i386/Config.lb index ff8fb705ab..72253f7763 100644 --- a/src/mainboard/emulation/qemu-i386/Config.lb +++ b/src/mainboard/emulation/qemu-i386/Config.lb @@ -39,6 +39,7 @@ arch i386 end ## driver mainboard.o +object vgabios.o if HAVE_PIRQ_TABLE object irq_tables.o end #object reset.o diff --git a/src/mainboard/emulation/qemu-i386/mainboard.c b/src/mainboard/emulation/qemu-i386/mainboard.c index 497f66eaa4..50ddee1988 100644 --- a/src/mainboard/emulation/qemu-i386/mainboard.c +++ b/src/mainboard/emulation/qemu-i386/mainboard.c @@ -1,6 +1,38 @@ +#include <console/console.h> #include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#include <arch/io.h> #include "chip.h" +void vga_enable_console(); + +static void vga_init(device_t dev) +{ + /* code to make vga init run in real mode - does work but against the current Linuxbios philosophy */ + printk_debug("INSTALL REAL-MODE IDT\n"); + setup_realmode_idt(); + printk_debug("DO THE VGA BIOS\n"); + do_vgabios(); + + vga_enable_console(); +} + +static struct device_operations vga_operations = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = vga_init, + .ops_pci = 0, +}; + +static struct pci_driver vga_driver __pci_driver = { + .ops = &vga_operations, + .vendor = 0x1013, + .device = 0x00b8, +}; + struct chip_operations mainboard_emulation_qemu_i386_ops = { CHIP_NAME("QEMU Mainboard") }; diff --git a/src/mainboard/emulation/qemu-i386/vgabios.c b/src/mainboard/emulation/qemu-i386/vgabios.c new file mode 100644 index 0000000000..072cb7f21c --- /dev/null +++ b/src/mainboard/emulation/qemu-i386/vgabios.c @@ -0,0 +1,838 @@ +#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> + +/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 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() +{ + __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 $0x0002,%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_debug("NO VGA FOUND\n"); + return; + } + printk_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 = 0xc0000; + // pci_write_config32(dev, PCI_ROM_ADDRESS, rom|1); + printk_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.u.pci.devfn; + printk_debug("bus/devfn = %#x\n", busdevfn); + + real_mode_switch_call_vga(busdevfn); + } else + printk_debug("Failed to copy VGA BIOS to 0xc0000\n"); + } else + printk_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_debug("biosint: INT# 0x%lx\n", intnumber); + printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", + eax, ebx, ecx, edx); + printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", + ebp, esp, edi, esi); + printk_debug("biosint: ip 0x%x cs 0x%x flags 0x%x\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_info("biosint: Oops, exception %u\n", intnumber); + if (esp < 0x1000) { + printk_debug("Stack contents: "); + while (esp < 0x1000) { + printk_debug("0x%04x ", *(unsigned short *) esp); + esp += 2; + } + printk_debug("\n"); + } + printk_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_info("BIOSINT: Unsupport int #0x%x\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 gabage 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.u.pci.devfn & 0xff); + printk_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_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_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_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/targets/emulation/qemu-i386/Config.lb b/targets/emulation/qemu-i386/Config.lb index 23e831cc78..cf4e773252 100644 --- a/targets/emulation/qemu-i386/Config.lb +++ b/targets/emulation/qemu-i386/Config.lb @@ -12,8 +12,8 @@ option IRQ_SLOT_COUNT=6 romimage "image" option ROM_IMAGE_SIZE=0x10000 - option LINUXBIOS_EXTRA_VERSION="-OpenBIOS" - payload /home/stepan/openbios.elf + option LINUXBIOS_EXTRA_VERSION="-GRUB2" + payload /home/stepan/core.img end buildrom ./qemu-bios.rom ROM_SIZE "image" |