Subversion Repositories HelenOS

Rev

Rev 4127 | Rev 4149 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 4127 Rev 4128
Line 1... Line 1...
1 
#ifdef CONFIG_FB
 1 
#ifdef CONFIG_FB
- 
 
 2 
 
- 
 
 3 
#define MULTIBOOT_LOADER_MAGIC  0x2BADB002
- 
 
 4 
#define MBINFO_BIT_CMDLINE      2
- 
 
 5 
#define MBINFO_OFFSET_CMDLINE   16
- 
 
 6 
 
- 
 
 7 
	# copy real mode VESA initialization code
- 
 
 8
2 
	mov $vesa_init, %esi
 9 
	mov $vesa_init, %esi
3 
	mov $VESA_INIT_SEGMENT << 4, %edi
 10 
	mov $VESA_INIT_SEGMENT << 4, %edi
4 
	mov $e_vesa_init - vesa_init, %ecx
 11 
	mov $e_vesa_init - vesa_init, %ecx
5 
	rep movsb
 12 
	rep movsb
6
13
- 
 
 14 
	# check for GRUB command line
- 
 
 15
- 
 
 16 
	mov grub_eax, %eax
- 
 
 17 
	cmp $MULTIBOOT_LOADER_MAGIC, %eax
- 
 
 18 
	jne no_cmdline
- 
 
 19
- 
 
 20 
	mov grub_ebx, %ebx
- 
 
 21 
	mov (%ebx), %eax
- 
 
 22 
	bt $MBINFO_BIT_CMDLINE, %eax
- 
 
 23 
	jnc no_cmdline
- 
 
 24
- 
 
 25 
	# skip the kernel path in command line
- 
 
 26
- 
 
 27 
	mov MBINFO_OFFSET_CMDLINE(%ebx), %esi
- 
 
 28
- 
 
 29 
	skip_loop:
- 
 
 30 
		lodsb
- 
 
 31
- 
 
 32 
		cmp $0, %al
- 
 
 33 
		je no_cmdline
- 
 
 34
- 
 
 35 
		cmp $' ', %al
- 
 
 36 
		je skip_loop_done
- 
 
 37
- 
 
 38 
		jmp skip_loop
- 
 
 39 
	skip_loop_done:
- 
 
 40
- 
 
 41 
	mov (%esi), %al
- 
 
 42 
	cmp $0, %al
- 
 
 43 
	je no_cmdline
- 
 
 44
- 
 
 45 
	# copy at most 23 characters from command line
- 
 
 46
- 
 
 47 
	mov $VESA_INIT_SEGMENT << 4, %edi
- 
 
 48 
	add $default_mode - vesa_init, %edi
- 
 
 49 
	mov $23, %ecx
- 
 
 50
- 
 
 51 
	cmd_loop:
- 
 
 52 
		lodsb
- 
 
 53 
		stosb
- 
 
 54
- 
 
 55 
		cmp $0, %al
- 
 
 56 
		je cmd_loop_done
- 
 
 57
- 
 
 58 
		loop cmd_loop
- 
 
 59 
	cmd_loop_done:
- 
 
 60
- 
 
 61 
	# zero termination
- 
 
 62
- 
 
 63 
	xor %eax, %eax
- 
 
 64 
	stosb
- 
 
 65
- 
 
 66 
	no_cmdline:
- 
 
 67
- 
 
 68 
	# jump to the real mode
- 
 
 69
7 
	mov $VESA_INIT_SEGMENT << 4, %edi
 70 
	mov $VESA_INIT_SEGMENT << 4, %edi
8 
	jmpl *%edi
 71 
	jmpl *%edi
9
72
10 
	vesa_meeting_point:
 73 
	vesa_meeting_point:
- 
 
 74 
		# returned back to protected mode
- 
 
 75
11 
		mov %esi, KA2PA(vesa_ph_addr)
 76 
		mov %esi, KA2PA(vesa_ph_addr)
12 
		mov %di, KA2PA(vesa_height)
 77 
		mov %di, KA2PA(vesa_height)
13 
		shr $16, %edi
 78 
		shr $16, %edi
14 
		mov %di, KA2PA(vesa_width)
 79 
		mov %di, KA2PA(vesa_width)
15 
		mov %bx, KA2PA(vesa_scanline)
 80 
		mov %bx, KA2PA(vesa_scanline)