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intwrapped halt

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-04-04 18:42:48 +02:00
parent 1b8cb8573b
commit 42c4f00016
3 changed files with 65 additions and 61 deletions
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60
kern/i386/pc/startup.S
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@ -450,16 +450,6 @@ gate_a20_check_state:
*/
. = _start + GRUB_KERNEL_MACHINE_RAW_SIZE
/*
* This next part is sort of evil. It takes advantage of the
* byte ordering on the x86 to work in either 16-bit or 32-bit
* mode, so think about it before changing it.
*/
FUNCTION(grub_hard_stop)
hlt
jmp EXT_C(grub_hard_stop)
/*
* grub_stop_floppy()
@ -486,56 +476,6 @@ FUNCTION(grub_exit)
jmp cold_reboot
.code32
/*
* grub_halt(int no_apm)
*
* Halt the system, using APM if possible. If NO_APM is true, don't use
* APM even if it is available.
*/
FUNCTION(grub_halt)
/* see if zero */
testl %eax, %eax
jnz EXT_C(grub_stop)
call prot_to_real
.code16
/* detect APM */
movw $0x5300, %ax
xorw %bx, %bx
int $0x15
jc EXT_C(grub_hard_stop)
/* don't check %bx for buggy BIOSes... */
/* disconnect APM first */
movw $0x5304, %ax
xorw %bx, %bx
int $0x15
/* connect APM */
movw $0x5301, %ax
xorw %bx, %bx
int $0x15
jc EXT_C(grub_hard_stop)
/* set APM protocol level - 1.1 or bust. (this covers APM 1.2 also) */
movw $0x530E, %ax
xorw %bx, %bx
movw $0x0101, %cx
int $0x15
jc EXT_C(grub_hard_stop)
/* set the power state to off */
movw $0x5307, %ax
movw $1, %bx
movw $3, %cx
int $0x15
/* shouldn't reach here */
jmp EXT_C(grub_hard_stop)
.code32
/*
* void grub_chainloader_real_boot (int drive, void *part_addr)
*