303,11 → 303,12 |
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#define VESA_INFO_SIZE 1024 |
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#define VESA_MODE_ATTRIBUTES_OFFSET 0 |
#define VESA_MODE_LIST_PTR_OFFSET 14 |
#define VESA_MODE_SCANLINE_OFFSET 16 |
#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 |
317,14 → 318,14 |
#define VESA_GET_INFO 0x4f00 |
#define VESA_GET_MODE_INFO 0x4f01 |
#define VESA_SET_MODE 0x4f02 |
#define VESA_SET_PALETTE 0x4f09 |
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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 |
#define CONFIG_VESA_BPP_VARIANT 32 |
#endif |
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mov $VESA_GET_INFO, %ax |
mov $e_vesa_init - vesa_init, %di |
push %di |
339,7 → 340,7 |
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 |
369,10 → 370,13 |
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mov $CONFIG_VESA_BPP, %al |
cmp VESA_MODE_BPP_OFFSET(%di), %al |
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#ifdef CONFIG_VESA_BPP_VARIANT |
jz 2f |
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mov $CONFIG_VESA_BPP_a, %al |
mov $CONFIG_VESA_BPP_VARIANT, %al |
cmp VESA_MODE_BPP_OFFSET(%di), %al |
#endif |
jnz 1b |
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2: |
386,7 → 390,60 |
pop %di |
cmp $VESA_OK, %al |
jnz 0f |
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#if CONFIG_VESA_BPP == 8 |
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# Set 3:2:3 VGA palette |
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mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax |
push %di |
mov $vga323 - vesa_init, %di |
mov $0x100, %ecx |
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bt $5, %ax # Test if VGA compatible registers are present |
jnc vga_compat |
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# Try VESA routine to set palette |
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mov $VESA_SET_PALETTE, %ax |
xor %bl, %bl |
xor %dx, %dx |
int $0x10 |
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jmp vga_not_compat |
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vga_compat: |
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# Try VGA registers to set palette |
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movw $0x3c6, %dx # Set palette mask |
movb $0xff, %al |
outb %al, %dx |
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movw $0x3c8, %dx # First index to set |
xor %al, %al |
outb %al, %dx |
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movw $0x3c9, %dx # Data port |
vga_loop: |
movb %es:2(%di), %al |
outb %al, %dx |
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movb %es:1(%di), %al |
outb %al, %dx |
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movb %es:(%di), %al |
outb %al, %dx |
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addw $4, %di |
loop vga_loop |
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vga_not_compat: |
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pop %di |
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#endif |
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mov VESA_MODE_PHADDR_OFFSET(%di), %esi |
mov VESA_MODE_WIDTH_OFFSET(%di), %ax |
shl $16, %eax |
427,8 → 484,10 |
mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA |
xor %ax, %ax |
jz 8b # Force relative jump |
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vga323: |
#include "vga323.pal" |
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.code32 |
vesa_init_protect: |
movw $gdtselector(KDATA_DES), %cx |
577,4 → 636,4 |
.long 0 |
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long_mode_msg: |
.ascii "64 bit long mode not supported. System halted.\0" |
.asciz "64 bit long mode not supported. System halted." |