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Option ROM init x86/x86emu update

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- use default display in int 15 5f35
- move REALMODE_BASE to 0x600, 0x500 can be BDA
- add regparm for assembler functions
- use memset instead of own implementation
- YABEL: copy back the IVT, BDA and VBIOS. Some Xorg drivers require this.
- YABEL: use hardware timer instead of emulated timer, because the emulated
  timer's base is never initialized (leading to division by zero if the 
  timer is really used)

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4852 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer
2009-10-25 19:50:47 +00:00
committed by Stefan Reinauer
parent 46a895e633
commit 074356ec81
5 changed files with 17 additions and 10 deletions
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10
util/x86emu/x86.c
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@@ -29,7 +29,7 @@
#include <console.h>
#endif
#define REALMODE_BASE ((void *)0x500)
#define REALMODE_BASE ((void *)0x600)
struct realmode_idt {
u16 offset, cs;
@@ -41,8 +41,8 @@ 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) = (void *)&__run_optionrom;
void (*vga_enable_console)(void) = (void *)&__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 };
@@ -127,9 +127,7 @@ void run_bios(struct device *dev, unsigned long addr)
int i;
/* clear vga bios data area */
for (i = 0x400; i < 0x500; i++) {
*(unsigned char *) i = 0;
}
memset(0x400, 0, 0x200);
/* Set up C interrupt handlers */
setup_interrupt_handlers();