Subversion Repositories HelenOS-historic

Rev

Rev 680 | Rev 694 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 680 Rev 685
Line 47... Line 47...
47 
#define START_STACK (BOOTSTRAP_OFFSET-0x400)
 47 
#define START_STACK (BOOTSTRAP_OFFSET-0x400)
48
48
49 
.section K_TEXT_START, "ax"
 49 
.section K_TEXT_START, "ax"
50 
.code16
 50 
.code16
51 
.global kernel_image_start
 51 
.global kernel_image_start
- 
 
 52 
.global multiboot_image_start
52 
kernel_image_start:
 53 
kernel_image_start:
53 
	cli
 54 
	cli
54 
	xorw %ax,%ax
 55 
	xorw %ax,%ax
55 
	movw %ax,%ds
 56 
	movw %ax,%ds
56 
	movw %ax,%es
 57 
	movw %ax,%es
Line 93... Line 94...
93 
	.long 0
 94 
	.long 0
94 
	.long multiboot_image_start + BOOT_OFFSET
 95 
	.long multiboot_image_start + BOOT_OFFSET
95 
 
 96 
 
96 
multiboot_image_start:
 97 
multiboot_image_start:
97 
	movl $START_STACK, %esp				# initialize stack pointer
 98 
	movl $START_STACK, %esp				# initialize stack pointer
- 
 
 99
- 
 
 100 
	lgdt protected_bootstrap_gdtr + BOOT_OFFSET		# initialize Global Descriptor Table register
- 
 
 101 
 
- 
 
 102 
	movw $gdtselector(KDATA_DES), %cx
- 
 
 103 
	movw %cx, %es
- 
 
 104 
	movw %cx, %gs
98 
	# FIXME TODO
 105 
	movw %cx, %fs
- 
 
 106 
	movw %cx, %ds							# kernel data + stack
- 
 
 107 
	movw %cx, %ss
- 
 
 108
- 
 
 109 
	jmpl $gdtselector(KTEXT_DES), $multiboot_meeting_point + BOOT_OFFSET
- 
 
 110 
	multiboot_meeting_point:
- 
 
 111
- 
 
 112 
	hlt
99 
 
 113 
 
100 
# Protected 32-bit. We want to reuse the code-seg descriptor,
 114 
# Protected 32-bit. We want to reuse the code-seg descriptor,
101 
# the Default operand size must not be 1 when entering long mode
 115 
# the Default operand size must not be 1 when entering long mode
102 
now_in_prot:
116 
now_in_prot:
103 
	# Set up stack & data descriptors
 117 
	# Set up stack & data descriptors
Line 206... Line 220...
206 
 
 220 
 
207 
.global real_bootstrap_gdtr_boot
 221 
.global real_bootstrap_gdtr_boot
208 
real_bootstrap_gdtr_boot:
 222 
real_bootstrap_gdtr_boot:
209 
	.word gdtselector(GDT_ITEMS)
 223 
	.word gdtselector(GDT_ITEMS)
210 
	.long KA2PA(gdt)-BOOT_OFFSET
 224 
	.long KA2PA(gdt)-BOOT_OFFSET
- 
 
 225 
 
- 
 
 226 
.global protected_bootstrap_gdtr
- 
 
 227 
protected_bootstrap_gdtr:
- 
 
 228 
	.word gdtselector(GDT_ITEMS)
- 
 
 229 
	.long KA2PA(gdt)