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Ignore whitespace Rev 1286 → Rev 1287

/kernel/trunk/arch/ia32/src/boot/boot.S
34,6 → 34,14
 
#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
 
 
 
 
 
 
 
 
 
.section K_TEXT_START, "ax"
 
KTEXT=8
68,6 → 76,24
pushl %ebx # save parameters from GRUB
pushl %eax
 
#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_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
call map_kernel # map kernel and turn paging on
230,9 → 256,191
movl %ebx, %cr0
ret
 
#ifdef CONFIG_FB
vesa_init:
jmp $selector(VESA_INIT_DES),$vesa_init_real-vesa_init;
.code16
vesa_init_real:
 
mov %cr0,%eax;
and $~1,%eax;
mov %eax,%cr0;
 
 
jmp $VESA_INIT_SEGMENT,$vesa_init_real2-vesa_init;
 
vesa_init_real2:
 
 
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;
 
mov $vesa_idt-vesa_init,%ebx;
lidtl (%ebx);
 
#define VESA_INFO_SIZE 1024
 
#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
 
#define VESA_END_OF_MODES 0xffff
 
#define VESA_OK 0x4f
 
#define VESA_GET_INFO 0x4f00
#define VESA_GET_MODE_INFO 0x4f01
#define VESA_SET_MODE 0x4f02
 
#define CONFIG_VESA_BPP_a 255
 
#if CONFIG_VESA_BPP==24
#undef CONFIG_VESA_BPP_a
#define CONFIG_VESA_BPP_a 32
#endif
 
 
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;
 
add $VESA_INFO_SIZE,%di;
 
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;
 
2:
 
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;
 
8:
 
mov %cr0,%eax;
or $1,%eax;
mov %eax,%cr0;
 
jmp 9f;
9:
 
pop %cx;
pop %ebp;
pop %gs;
pop %fs;
pop %es;
pop %ds;
mov %cx,%ss;
mov %ebp,%esp;
 
ljmpl $KTEXT,$(vesa_init_protect-vesa_init+VESA_INIT_SEGMENT<<4);
 
vesa_init_protect:
.code32
ret;
 
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;
jmp 2b;
 
1:mov $0x0003,%ax;
int $0x10;
mov $0xffffffff,%edi; /* EGA text mode used, because of problems with VESA */
jmp 8;
 
 
vesa_idt:
.word 0x03ff
.long 0
.align 4
e_vesa_init:
#endif
 
 
 
.section K_DATA_START, "aw", @progbits
 
 
 
.align 4096
page_directory:
.space 4096, 0