summaryrefslogtreecommitdiff
path: root/util/x86emu/x86.c
diff options
context:
space:
mode:
Diffstat (limited to 'util/x86emu/x86.c')
-rw-r--r--util/x86emu/x86.c244
1 files changed, 0 insertions, 244 deletions
diff --git a/util/x86emu/x86.c b/util/x86emu/x86.c
deleted file mode 100644
index 2ce5b4534d..0000000000
--- a/util/x86emu/x86.c
+++ /dev/null
@@ -1,244 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2009 coresystems GmbH
- *
- * 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 <device/pci.h>
-#include <string.h>
-
-#include <arch/io.h>
-#include <arch/registers.h>
-#include <console/console.h>
-#include <arch/interrupt.h>
-
-#define REALMODE_BASE ((void *)0x600)
-
-struct realmode_idt {
- u16 offset, cs;
-};
-
-void x86_exception(struct eregs *info);
-
-extern unsigned char __idt_handler, __idt_handler_size;
-extern unsigned char __realmode_code, __realmode_code_size;
-extern unsigned char __run_optionrom, __run_interrupt;
-
-void (*run_optionrom)(u32 devfn) __attribute__((regparm(0))) = (void *)&__run_optionrom;
-void (*vga_enable_console)(void) __attribute__((regparm(0))) = (void *)&__run_interrupt;
-
-int (*intXX_handler[256])(struct eregs *regs) = { NULL };
-
-static int intXX_exception_handler(struct eregs *regs)
-{
- printk(BIOS_INFO, "Oops, exception %d while executing option rom\n",
- regs->vector);
- x86_exception(regs); // Call coreboot exception handler
-
- return 0; // Never returns?
-}
-
-static int intXX_unknown_handler(struct eregs *regs)
-{
- printk(BIOS_INFO, "Unsupported software interrupt #0x%x\n",
- regs->vector);
-
- return -1;
-}
-
-/* setup interrupt handlers for mainboard */
-void mainboard_interrupt_handlers(int intXX, void *intXX_func)
-{
- intXX_handler[intXX] = intXX_func;
-}
-
-int int12_handler(struct eregs *regs);
-int int15_handler(struct eregs *regs);
-int int1a_handler(struct eregs *regs);
-
-static void setup_interrupt_handlers(void)
-{
- int i;
-
- /* The first 16 intXX functions are not BIOS services,
- * but the CPU-generated exceptions ("hardware interrupts")
- */
- for (i = 0; i < 0x10; i++)
- intXX_handler[i] = &intXX_exception_handler;
-
- /* Mark all other intXX calls as unknown first */
- for (i = 0x10; i < 0x100; i++)
- {
- /* If the mainboard_interrupt_handler isn't called first.
- */
- if(!intXX_handler[i])
- {
- /* Now set the default functions that are actually
- * needed to initialize the option roms. This is very
- * slick, as it allows us to implement mainboard specific
- * interrupt handlers, such as the int15
- */
- switch (i) {
- case 0x12:
- intXX_handler[0x12] = &int12_handler;
- break;
- case 0x15:
- intXX_handler[0x15] = &int15_handler;
- break;
- case 0x1a:
- intXX_handler[0x1a] = &int1a_handler;
- break;
- default:
- intXX_handler[i] = &intXX_unknown_handler;
- break;
- }
- }
- }
-}
-
-static void write_idt_stub(void *target, u8 intnum)
-{
- unsigned char *codeptr;
- codeptr = (unsigned char *) target;
- memcpy(codeptr, &__idt_handler, (size_t)&__idt_handler_size);
- codeptr[3] = intnum; /* modify int# in the code stub. */
-}
-
-static void setup_realmode_idt(void)
-{
- struct realmode_idt *idts = (struct realmode_idt *) 0;
- int i;
-
- /* Copy IDT stub code for each interrupt. This might seem wasteful
- * but it is really simple
- */
- for (i = 0; i < 256; i++) {
- idts[i].cs = 0;
- idts[i].offset = 0x1000 + (i * (u32)&__idt_handler_size);
- write_idt_stub((void *)((u32 )idts[i].offset), i);
- }
-
- /* Many option ROMs use the hard coded interrupt entry points in the
- * system bios. So install them at the known locations.
- * Only need int10 so far.
- */
-
- /* int42 is the relocated int10 */
- write_idt_stub((void *)0xff065, 0x42);
-}
-
-void run_bios(struct device *dev, unsigned long addr)
-{
- /* clear vga bios data area */
- memset((void *)0x400, 0, 0x200);
-
- /* Set up C interrupt handlers */
- setup_interrupt_handlers();
-
- /* Setting up realmode IDT */
- setup_realmode_idt();
-
- memcpy(REALMODE_BASE, &__realmode_code, (size_t)&__realmode_code_size);
- printk(BIOS_SPEW, "Real mode stub @%p: %d bytes\n", REALMODE_BASE,
- (u32)&__realmode_code_size);
-
- printk(BIOS_DEBUG, "Calling Option ROM...\n");
- run_optionrom((dev->bus->secondary << 8) | dev->path.pci.devfn);
- printk(BIOS_DEBUG, "... Option ROM returned.\n");
-}
-
-int __attribute__((regparm(0))) interrupt_handler(u32 intnumber,
- u32 gsfs, u32 dses,
- u32 edi, u32 esi,
- u32 ebp, u32 esp,
- u32 ebx, u32 edx,
- u32 ecx, u32 eax,
- u32 cs_ip, u16 stackflags);
-
-int __attribute__((regparm(0))) interrupt_handler(u32 intnumber,
- u32 gsfs, u32 dses,
- u32 edi, u32 esi,
- u32 ebp, u32 esp,
- u32 ebx, u32 edx,
- u32 ecx, u32 eax,
- u32 cs_ip, u16 stackflags)
-{
- u32 ip;
- u32 cs;
- u32 flags;
- int ret = -1;
- struct eregs reg_info;
-
- ip = cs_ip & 0xffff;
- cs = cs_ip >> 16;
- flags = stackflags;
-
- printk(BIOS_DEBUG, "oprom: INT# 0x%x\n", intnumber);
- printk(BIOS_DEBUG, "oprom: eax: %08x ebx: %08x ecx: %08x edx: %08x\n",
- eax, ebx, ecx, edx);
- printk(BIOS_DEBUG, "oprom: ebp: %08x esp: %08x edi: %08x esi: %08x\n",
- ebp, esp, edi, esi);
- printk(BIOS_DEBUG, "oprom: ip: %04x cs: %04x flags: %08x\n",
- ip, cs, flags);
-
- // Fetch arguments from the stack and put them into
- // a structure that we want to pass on to our sub interrupt
- // handlers.
- reg_info = (struct eregs) {
- .eax=eax,
- .ecx=ecx,
- .edx=edx,
- .ebx=ebx,
- .esp=esp,
- .ebp=ebp,
- .esi=esi,
- .edi=edi,
- .vector=intnumber,
- .error_code=0, // ??
- .eip=ip,
- .cs=cs,
- .eflags=flags // ??
- };
-
- // Call the interrupt handler for this int#
- ret = intXX_handler[intnumber](&reg_info);
-
- // Put registers back on the stack. The assembler code
- // will later pop them.
- // What happens here is that we force (volatile!) changing
- // the values of the parameters of this function. We do this
- // because we know that they stay alive on the stack after
- // we leave this function. Don't say this is bollocks.
- *(volatile u32 *)&eax = reg_info.eax;
- *(volatile u32 *)&ecx = reg_info.ecx;
- *(volatile u32 *)&edx = reg_info.edx;
- *(volatile u32 *)&ebx = reg_info.ebx;
- *(volatile u32 *)&esi = reg_info.esi;
- *(volatile u32 *)&edi = reg_info.edi;
- flags = reg_info.eflags;
-
- /* Pass errors back to our caller via the CARRY flag */
- if (ret) {
- printk(BIOS_DEBUG,"error!\n");
- flags |= 1; // error: set carry
- }else{
- flags &= ~1; // no error: clear carry
- }
- *(volatile u16 *)&stackflags = flags;
-
- return ret;
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 20:49:44 +0000