58,8 → 58,8 |
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movw $KDATA, %cx |
movw %cx, %es |
movw %cx, %fs |
movw %cx, %gs |
movw %cx, %fs |
movw %cx, %ds # kernel data + stack |
movw %cx, %ss |
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68,23 → 68,26 |
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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; |
mov $vesa_init, %esi |
mov $VESA_INIT_SEGMENT << 4, %edi |
mov $e_vesa_init - vesa_init, %ecx |
cld |
rep movsb |
|
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); |
mov $VESA_INIT_SEGMENT << 4, %edi |
jmpl %edi |
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vesa_meeting_point: |
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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 |
250,44 → 253,35 |
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#ifdef CONFIG_FB |
vesa_init: |
jmp $selector(VESA_INIT_DES),$vesa_init_real-vesa_init; |
jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init |
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.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; |
|
mov %bx,%ds; |
mov %bx,%es; |
mov %bx,%fs; |
mov %bx,%gs; |
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vesa_init_real: |
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mov $vesa_idt-vesa_init,%ebx; |
lidtl (%ebx); |
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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 $VESA_INIT_SEGMENT, %bx |
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mov %bx, %es |
mov %bx, %fs |
mov %bx, %gs |
mov %bx, %ds |
mov %bx, %ss |
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movl %esp, %eax |
movl $0x0000fffc, %esp |
movl $0x0000fffc, %ebp |
pushl %eax |
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#define VESA_INFO_SIZE 1024 |
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#define VESA_MODE_LIST_PTR_OFFSET 14 |
#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 |
294,135 → 288,138 |
#define VESA_MODE_SCANLINE_OFFSET 16 |
#define VESA_MODE_PHADDR_OFFSET 40 |
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#define VESA_END_OF_MODES 0xffff |
#define VESA_END_OF_MODES 0xffff |
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#define VESA_OK 0x4f |
#define VESA_OK 0x4f |
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#define VESA_GET_INFO 0x4f00 |
#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 |
#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 |
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pop %di |
cmp $VESA_OK, %al |
jnz 0f |
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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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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; |
|
|
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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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 |
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mov $CONFIG_VESA_HEIGHT,%ax |
cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax |
jnz 1b |
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mov $CONFIG_VESA_BPP, %al |
cmp VESA_MODE_BPP_OFFSET(%di), %al |
jz 2f |
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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; |
mov %cx, %bx |
or $0xc000, %bx |
push %di |
mov $VESA_SET_MODE, %ax |
int $0x10 |
|
pop %di |
cmp $VESA_OK, %al |
jnz 0f |
|
|
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; |
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mov %cr0, %eax |
or $1, %eax |
mov %eax,%cr0 |
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jmp 9f |
9: |
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ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4) |
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pop %cx; |
pop %ebp; |
pop %gs; |
pop %fs; |
pop %es; |
pop %ds; |
mov %cx,%ss; |
mov %ebp,%esp; |
0:# No prefered mode found |
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 |
jz 2b # Force relative jump |
|
1: |
mov $0x0003, %ax |
int $0x10 |
mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA |
xor %ax, %ax |
jz 8b # Force relative jump |
|
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ljmpl $KTEXT,$(vesa_init_protect-vesa_init+VESA_INIT_SEGMENT<<4); |
.code32 |
vesa_init_protect: |
popl %esp |
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movw $KDATA, %cx |
movw %cx, %es |
movw %cx, %fs |
movw %cx, %gs |
movw %cx, %ds # kernel data + stack |
movw %cx, %ss |
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jmpl $KTEXT, $vesa_meeting_point |
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0: #Error no Prefered mode found |
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; |
jz 2b; /* Force relative jump */ |
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1:mov $0x0003,%ax; |
int $0x10; |
mov $0xffffffff,%edi; /* EGA text mode used, because of problems with VESA */ |
xor %ax,%ax |
jz 8b; /* Force relative jump */ |
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vesa_init_protect: |
.code32 |
ret; |
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vesa_idt: |
.word 0x03ff |
.long 0 |
.align 4 |
e_vesa_init: |
#endif |