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This patch makes the vm86 call succeed. It

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1. moves the run_bios function down so it can call setup_realmode_idt
2. adds the __attribute__((regnum(0))) to biosint because it is called from assembly

Signed-off-by: Myles Watson <mylesgw@gmail.com>
Acked-by: Stefan Reinauer <stepan@coresystems.de>


git-svn-id: svn://coreboot.org/repository/coreboot-v3@964 f3766cd6-281f-0410-b1cd-43a5c92072e9
This commit is contained in:
Myles Watson 2008-10-29 20:39:32 +00:00
commit eece345b2c
1 changed files with 12 additions and 18 deletions
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30
util/x86emu/vm86.c
View file

@ -29,7 +29,6 @@
#include <string.h>
#include <io.h>
/* The address arguments to this function are PHYSICAL ADDRESSES */
static void real_mode_switch_call_vga(unsigned long devfn)
{
@ -240,19 +239,6 @@ void vga_enable_console(void)
);
}
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;
}
real_mode_switch_call_vga((dev->bus->secondary << 8) | dev->path.pci.devfn);
}
// we had hoped to avoid this.
// this is a stub IDT only. It's main purpose is to ignore calls
// to the BIOS.
@ -415,7 +401,7 @@ int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
extern void vga_exit(void);
int biosint(unsigned long intnumber,
int __attribute__((regparm(0))) biosint(unsigned long intnumber,
unsigned long gsfs, unsigned long dses,
unsigned long edi, unsigned long esi,
unsigned long ebp, unsigned long esp,
@ -484,7 +470,6 @@ int biosint(unsigned long intnumber,
return ret;
}
void setup_realmode_idt(void)
{
extern unsigned char idthandle, end_idthandle;
@ -543,11 +528,20 @@ void setup_realmode_idt(void)
idts[1].offset = 16384;
memcpy((void *)16384, &debughandle, &end_debughandle - &debughandle);
#endif
}
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;
}
setup_realmode_idt();
real_mode_switch_call_vga((dev->bus->secondary << 8) | dev->path.pci.devfn);
}
enum {
CHECK = 0xb001,