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kvm tools, bios: Convert int15 code to C

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This patch convert the int15 interrupt handler code into C.

Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Pekka Enberg
2011-08-12 13:55:45 +03:00
committed by Will Deacon
parent 92748de477
commit 677a2bf1ac
5 changed files with 24 additions and 9 deletions
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Makefile
+4 -2
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@@ -199,15 +199,17 @@ BIOS_CFLAGS += -mregparm=3
bios.o: bios/bios.bin bios/bios-rom.h
bios/bios.bin.elf: bios/bios.S bios/e820.c bios/int10.c bios/rom.ld.S
bios/bios.bin.elf: bios/bios.S bios/e820.c bios/int10.c bios/int15.c bios/rom.ld.S
$(E) " CC bios/e820.o"
$(Q) $(CC) -include code16gcc.h $(CFLAGS) $(BIOS_CFLAGS) -c -s bios/e820.c -o bios/e820.o
$(E) " CC bios/int10.o"
$(Q) $(CC) -include code16gcc.h $(CFLAGS) $(BIOS_CFLAGS) -c -s bios/int10.c -o bios/int10.o
$(E) " CC bios/int15.o"
$(Q) $(CC) -include code16gcc.h $(CFLAGS) $(BIOS_CFLAGS) -c -s bios/int15.c -o bios/int15.o
$(E) " CC bios/bios.o"
$(Q) $(CC) $(CFLAGS) $(BIOS_CFLAGS) -c -s bios/bios.S -o bios/bios.o
$(E) " LD " $@
$(Q) ld -T bios/rom.ld.S -o bios/bios.bin.elf bios/bios.o bios/e820.o bios/int10.o
$(Q) ld -T bios/rom.ld.S -o bios/bios.bin.elf bios/bios.o bios/e820.o bios/int10.o bios/int15.o
bios/bios.bin: bios/bios.bin.elf
$(E) " OBJCOPY " $@
bios/bios.S
+3 -6
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@@ -73,16 +73,13 @@ ENTRY(bios_int10)
ENTRY_END(bios_int10)
ENTRY(bios_int15)
cmp $0xE820, %eax
jne 1f
SAVE_BIOSREGS
movl %esp, %eax # it's bioscall case
call e820_query_map
movl %esp, %eax
call int15_handler
RESTORE_BIOSREGS
1:
IRET
ENTRY_END(bios_int15)
bios/int15.c
+12
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@@ -0,0 +1,12 @@
#include "kvm/bios.h"
#include "kvm/e820.h"
bioscall void int15_handler(struct biosregs *regs)
{
switch (regs->eax) {
case 0xe820:
e820_query_map(regs);
break;
}
}
include/kvm/bios.h
+5
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@@ -58,6 +58,8 @@
#ifndef __ASSEMBLER__
#include <linux/types.h>
struct biosregs {
u32 eax;
u32 ebx;
@@ -73,6 +75,9 @@ struct biosregs {
u32 eflags;
};
void int10_handler(struct biosregs *regs);
void int15_handler(struct biosregs *regs);
#endif
#endif /* BIOS_H_ */
include/kvm/vesa.h
-1
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@@ -14,6 +14,5 @@ struct kvm;
struct biosregs;
struct framebuffer *vesa__init(struct kvm *self);
void int10_handler(struct biosregs *args);
#endif