34,6 → 34,14 |
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#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) |
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.section K_TEXT_START, "ax" |
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KTEXT=8 |
68,6 → 76,24 |
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pushl %ebx # save parameters from GRUB |
pushl %eax |
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#ifdef CONFIG_FB |
mov $vesa_init,%esi; |
mov $VESA_INIT_SEGMENT<<4,%edi; |
mov $e_vesa_init-vesa_init,%ecx; |
cld; |
rep movsb; |
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mov $VESA_INIT_SEGMENT<<4,%edi; |
call *%edi; |
mov %esi,KA2PA(vesa_ph_addr); |
mov %di,KA2PA(vesa_height); |
shr $16,%edi; |
mov %di,KA2PA(vesa_width); |
mov %bx,KA2PA(vesa_scanline); |
shr $16,%ebx; |
mov %bx,KA2PA(vesa_bpp); |
#endif |
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call map_kernel # map kernel and turn paging on |
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230,9 → 256,191 |
movl %ebx, %cr0 |
ret |
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#ifdef CONFIG_FB |
vesa_init: |
jmp $selector(VESA_INIT_DES),$vesa_init_real-vesa_init; |
.code16 |
vesa_init_real: |
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mov %cr0,%eax; |
and $~1,%eax; |
mov %eax,%cr0; |
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jmp $VESA_INIT_SEGMENT,$vesa_init_real2-vesa_init; |
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vesa_init_real2: |
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mov %esp,%ebp; |
mov %ss,%cx; |
mov $VESA_INIT_SEGMENT,%bx; |
mov %bx,%ss; |
mov $0x0000fffc,%esp; |
push %ds; |
push %es; |
push %fs; |
push %gs; |
push %ebp; |
push %cx; |
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mov %bx,%ds; |
mov %bx,%es; |
mov %bx,%fs; |
mov %bx,%gs; |
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mov $vesa_idt-vesa_init,%ebx; |
lidtl (%ebx); |
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#define VESA_INFO_SIZE 1024 |
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#define VESA_MODE_LIST_PTR_OFFSET 14 |
#define VESA_MODE_WIDTH_OFFSET 18 |
#define VESA_MODE_HEIGHT_OFFSET 20 |
#define VESA_MODE_BPP_OFFSET 25 |
#define VESA_MODE_SCANLINE_OFFSET 16 |
#define VESA_MODE_PHADDR_OFFSET 40 |
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#define VESA_END_OF_MODES 0xffff |
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#define VESA_OK 0x4f |
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#define VESA_GET_INFO 0x4f00 |
#define VESA_GET_MODE_INFO 0x4f01 |
#define VESA_SET_MODE 0x4f02 |
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#define CONFIG_VESA_BPP_a 255 |
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#if CONFIG_VESA_BPP==24 |
#undef CONFIG_VESA_BPP_a |
#define CONFIG_VESA_BPP_a 32 |
#endif |
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mov $VESA_GET_INFO,%ax; |
mov $e_vesa_init-vesa_init,%di |
push %di; |
int $0x10; |
pop %di; |
cmp $VESA_OK,%al; |
jnz 0f; |
mov 2+VESA_MODE_LIST_PTR_OFFSET(%di),%si; |
mov %si,%gs; |
mov VESA_MODE_LIST_PTR_OFFSET(%di),%si; |
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add $VESA_INFO_SIZE,%di; |
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1:# Try next mode |
mov %gs:(%si),%cx; |
cmp $VESA_END_OF_MODES,%cx; |
jz 0f; |
inc %si; |
inc %si; |
push %cx; |
push %di; |
push %si; |
mov $VESA_GET_MODE_INFO,%ax; |
int $0x10; |
pop %si; |
pop %di; |
pop %cx; |
cmp $VESA_OK,%al; |
jnz 0f; |
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mov $CONFIG_VESA_WIDTH,%ax; |
cmp VESA_MODE_WIDTH_OFFSET(%di),%ax; |
jnz 1b; |
mov $CONFIG_VESA_HEIGHT,%ax; |
cmp VESA_MODE_HEIGHT_OFFSET(%di),%ax; |
jnz 1b; |
mov $CONFIG_VESA_BPP,%al; |
cmp VESA_MODE_BPP_OFFSET(%di),%al; |
jz 2f; |
mov $CONFIG_VESA_BPP_a,%al; |
cmp VESA_MODE_BPP_OFFSET(%di),%al; |
jnz 1b; |
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2: |
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mov %cx,%bx; |
or $0xC000,%bx; |
push %di; |
mov $VESA_SET_MODE,%ax; |
int $0x10; |
pop %di; |
cmp $VESA_OK,%al; |
jnz 0f; |
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mov VESA_MODE_PHADDR_OFFSET(%di),%esi; |
mov VESA_MODE_WIDTH_OFFSET(%di),%ax; |
shl $16,%eax; |
mov VESA_MODE_HEIGHT_OFFSET(%di),%ax; |
mov VESA_MODE_BPP_OFFSET(%di),%bl; |
xor %bh,%bh; |
shl $16,%ebx; |
mov VESA_MODE_SCANLINE_OFFSET(%di),%bx; |
mov %eax,%edi; |
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8: |
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mov %cr0,%eax; |
or $1,%eax; |
mov %eax,%cr0; |
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jmp 9f; |
9: |
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pop %cx; |
pop %ebp; |
pop %gs; |
pop %fs; |
pop %es; |
pop %ds; |
mov %cx,%ss; |
mov %ebp,%esp; |
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ljmpl $KTEXT,$(vesa_init_protect-vesa_init+VESA_INIT_SEGMENT<<4); |
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vesa_init_protect: |
.code32 |
ret; |
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0: #Error no Prefered mode found |
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mov $0x111,%cx; |
push %di; |
push %cx; |
mov $VESA_GET_MODE_INFO,%ax; |
int $0x10; |
pop %cx; |
pop %di; |
cmp $VESA_OK,%al; |
jnz 1f; |
jmp 2b; |
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1:mov $0x0003,%ax; |
int $0x10; |
mov $0xffffffff,%edi; /* EGA text mode used, because of problems with VESA */ |
jmp 8; |
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vesa_idt: |
.word 0x03ff |
.long 0 |
.align 4 |
e_vesa_init: |
#endif |
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.section K_DATA_START, "aw", @progbits |
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.align 4096 |
page_directory: |
.space 4096, 0 |