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path: root/lib_i386/realmode_switch.S
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Diffstat (limited to 'lib_i386/realmode_switch.S')
-rw-r--r--lib_i386/realmode_switch.S60
1 files changed, 30 insertions, 30 deletions
diff --git a/lib_i386/realmode_switch.S b/lib_i386/realmode_switch.S
index 0433cd47c76..d6c74ecd79b 100644
--- a/lib_i386/realmode_switch.S
+++ b/lib_i386/realmode_switch.S
@@ -26,7 +26,7 @@
/*
* Stack frame at 0xe00
- * e00 ebx;
+ * e00 ebx;
* e04 ecx;
* e08 edx;
* e0c esi;
@@ -56,13 +56,13 @@ realmode_enter:
o32 pusha
o32 pushf
cli
- sidt saved_idt
- sgdt saved_gdt
- movl %esp, %eax
- movl %eax, saved_protected_mode_esp
+ sidt saved_idt
+ sgdt saved_gdt
+ movl %esp, %eax
+ movl %eax, saved_protected_mode_esp
movl $0x10, %eax
- movl %eax, %esp
+ movl %eax, %esp
movw $0x28, %ax
movw %ax, %ds
movw %ax, %es
@@ -70,10 +70,10 @@ o32 pushf
movw %ax, %gs
lidt realmode_idt_ptr
- movl %cr0, %eax /* Go back into real mode by */
- andl $0x7ffffffe, %eax /* clearing PE to 0 */
+ movl %cr0, %eax /* Go back into real mode by */
+ andl $0x7ffffffe, %eax /* clearing PE to 0 */
movl %eax, %cr0
- ljmp $0x0,$do_realmode /* switch to real mode */
+ ljmp $0x0,$do_realmode /* switch to real mode */
do_realmode: /* realmode code from here */
movw %cs,%ax
@@ -115,20 +115,20 @@ o32 popf
popw %ss
movl %eax, %esp
cs movl temp_eax, %eax
- wbinvd /* self-modifying code,
+ wbinvd /* self-modifying code,
* better flush the cache */
.byte 0x9a /* lcall */
temp_ip:
- .word 0 /* new ip */
+ .word 0 /* new ip */
temp_cs:
- .word 0 /* new cs */
+ .word 0 /* new cs */
realmode_ret:
/* save eax, esp and ss */
cs movl %eax, saved_eax
movl %esp, %eax
cs movl %eax, saved_esp
- movw %ss, %ax
+ movw %ss, %ax
cs movw %ax, saved_ss
/* restore the stack, note that we set sp to 0x244;
@@ -170,26 +170,26 @@ cs movw temp_ip, %ax
pushl %ebx
o32 cs lidt saved_idt
-o32 cs lgdt saved_gdt /* Set GDTR */
+o32 cs lgdt saved_gdt /* Set GDTR */
- movl %cr0, %eax /* Go back into protected mode */
- orl $1,%eax /* reset PE to 1 */
- movl %eax, %cr0
- jmp next_line /* flush prefetch queue */
+ movl %cr0, %eax /* Go back into protected mode */
+ orl $1,%eax /* reset PE to 1 */
+ movl %eax, %cr0
+ jmp next_line /* flush prefetch queue */
next_line:
movw $return_ptr, %ax
- movw %ax,%bp
+ movw %ax,%bp
o32 cs ljmp *(%bp)
.code32
protected_mode:
- movl $0x18,%eax /* reload GDT[3] */
- movw %ax,%fs /* reset FS */
- movw %ax,%ds /* reset DS */
- movw %ax,%gs /* reset GS */
- movw %ax,%es /* reset ES */
- movw %ax,%ss /* reset SS */
- movl saved_protected_mode_esp, %eax
+ movl $0x18,%eax /* reload GDT[3] */
+ movw %ax,%fs /* reset FS */
+ movw %ax,%ds /* reset DS */
+ movw %ax,%gs /* reset GS */
+ movw %ax,%es /* reset ES */
+ movw %ax,%ss /* reset SS */
+ movl saved_protected_mode_esp, %eax
movl %eax, %esp
popf
popa
@@ -199,7 +199,7 @@ temp_eax:
.long 0
saved_ss:
- .word 0
+ .word 0
saved_esp:
.long 0
saved_eax:
@@ -210,12 +210,12 @@ realmode_idt_ptr:
.word 0x0, 0x0
saved_gdt:
- .word 0, 0, 0, 0
+ .word 0, 0, 0, 0
saved_idt:
- .word 0, 0, 0, 0
+ .word 0, 0, 0, 0
saved_protected_mode_esp:
- .long 0
+ .long 0
return_ptr:
.long protected_mode