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Rev 2071 Rev 2219
Line 70... Line 70...
70 
	multiboot_meeting_point:
 70 
	multiboot_meeting_point:
71
71
72 
	movl %eax, grub_eax							# save parameters from GRUB
 72 
	movl %eax, grub_eax							# save parameters from GRUB
73 
	movl %ebx, grub_ebx
 73 
	movl %ebx, grub_ebx
74
74
- 
 
 75 
	# Protected 32-bit. We want to reuse the code-seg descriptor,
- 
 
 76 
	# the Default operand size must not be 1 when entering long mode
- 
 
 77
- 
 
 78 
	movl $0x80000000, %eax
- 
 
 79 
 	cpuid
- 
 
 80 
 	cmp $0x80000000, %eax						# any function > 80000000h?
- 
 
 81 
	jbe long_mode_unsupported
- 
 
 82 
	movl $(AMD_CPUID_EXTENDED), %eax			# Extended function code 80000001
- 
 
 83 
	cpuid
- 
 
 84 
	bt $29, %edx								# Test if long mode is supported.
- 
 
 85 
 	jc long_mode_supported
- 
 
 86 
 
- 
 
 87 
	long_mode_unsupported:
- 
 
 88 
		movl $long_mode_msg, %esi
- 
 
 89 
		jmp error_halt
- 
 
 90
- 
 
 91 
	long_mode_supported:
- 
 
 92
75 
#ifdef CONFIG_FB
 93 
#ifdef CONFIG_FB
76 
	mov $vesa_init, %esi;
 94 
	mov $vesa_init, %esi
77 
	mov $VESA_INIT_SEGMENT << 4, %edi
 95 
	mov $VESA_INIT_SEGMENT << 4, %edi
78 
	mov $e_vesa_init - vesa_init, %ecx
 96 
	mov $e_vesa_init - vesa_init, %ecx
79 
	cld
 97 
	cld
80 
	rep movsb
 98 
	rep movsb
81 
 
 99 
 
Line 90... Line 108...
90 
	mov %di, KA2PA(vesa_width)
 108 
	mov %di, KA2PA(vesa_width)
91 
	mov %bx, KA2PA(vesa_scanline)
 109 
	mov %bx, KA2PA(vesa_scanline)
92 
	shr $16, %ebx
 110 
	shr $16, %ebx
93 
	mov %bx, KA2PA(vesa_bpp)
 111 
	mov %bx, KA2PA(vesa_bpp)
94 
#endif
112 
#endif
95 
 
 - 
 
96 
	# Protected 32-bit. We want to reuse the code-seg descriptor,
 - 
 
97 
	# the Default operand size must not be 1 when entering long mode
 - 
 
98
- 
 
99 
	movl $0x80000000, %eax
- 
 
100 
 	cpuid
 - 
 
101 
 	cmp $0x80000000, %eax						# any function > 80000000h?
 - 
 
102 
	jbe long_mode_unsupported
 - 
 
103 
	movl $(AMD_CPUID_EXTENDED), %eax			# Extended function code 80000001
 - 
 
104 
	cpuid
 - 
 
105 
	bt $29, %edx								# Test if long mode is supported.
 - 
 
106 
 	jc long_mode_supported
 - 
 
107 
 
 - 
 
108 
	long_mode_unsupported:
 - 
 
109 
		cli
 - 
 
110 
		hlt
 - 
 
111
- 
 
112 
	long_mode_supported:
 - 
 
113
113
114 
	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
 114 
	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
115 
	# Paging is not enabled until after long mode is enabled
 115 
	# Paging is not enabled until after long mode is enabled
116
116
117 
	movl %cr4, %eax
 117 
	movl %cr4, %eax
Line 443... Line 443...
443
443
444 
	jmpl $gdtselector(KTEXT32_DES), $vesa_meeting_point
 444 
	jmpl $gdtselector(KTEXT32_DES), $vesa_meeting_point
445
445
446 
.align 4
 446 
.align 4
447 
e_vesa_init:
 447 
e_vesa_init:
448 
#endif
448 
#endif
- 
 
 449 
 
- 
 
 450 
# Print string from %esi to EGA display (in red) and halt
- 
 
 451 
error_halt:
- 
 
 452 
	movl $0xb8000, %edi						# base of EGA text mode memory
- 
 
 453 
	xorl %eax, %eax
- 
 
 454
- 
 
 455 
	movw $0x3d4, %dx						# read bits 8 - 15 of the cursor address
- 
 
 456 
	movb $0xe, %al
- 
 
 457 
	outb %al, %dx
- 
 
 458
- 
 
 459 
	movw $0x3d5, %dx
- 
 
 460 
	inb %dx, %al
- 
 
 461 
	shl $8, %ax
- 
 
 462
- 
 
 463 
	movw $0x3d4, %dx						# read bits 0 - 7 of the cursor address
- 
 
 464 
	movb $0xf, %al
- 
 
 465 
	outb %al, %dx
- 
 
 466
- 
 
 467 
	movw $0x3d5, %dx
- 
 
 468 
	inb %dx, %al
- 
 
 469
- 
 
 470 
	cmp $1920, %ax
- 
 
 471 
	jbe cursor_ok
- 
 
 472 
		movw $1920, %ax						# sanity check for the cursor on the last line
- 
 
 473 
	cursor_ok:
- 
 
 474
- 
 
 475 
	movw %ax, %bx
- 
 
 476 
	shl $1, %eax
- 
 
 477 
	addl %eax, %edi
- 
 
 478
- 
 
 479 
	movw $0x0c00, %ax						# black background, light red foreground
- 
 
 480 
	cld
- 
 
 481
- 
 
 482 
	ploop:
- 
 
 483 
		lodsb
- 
 
 484 
		cmp $0, %al
- 
 
 485 
		je ploop_end
- 
 
 486 
		stosw
- 
 
 487 
		inc %bx
- 
 
 488 
		jmp ploop
- 
 
 489 
	ploop_end:
- 
 
 490
- 
 
 491 
	movw $0x3d4, %dx						# write bits 8 - 15 of the cursor address
- 
 
 492 
	movb $0xe, %al
- 
 
 493 
	outb %al, %dx
- 
 
 494
- 
 
 495 
	movw $0x3d5, %dx
- 
 
 496 
	movb %bh, %al
- 
 
 497 
	outb %al, %dx
- 
 
 498
- 
 
 499 
	movw $0x3d4, %dx						# write bits 0 - 7 of the cursor address
- 
 
 500 
	movb $0xf, %al
- 
 
 501 
	outb %al, %dx
- 
 
 502
- 
 
 503 
	movw $0x3d5, %dx
- 
 
 504 
	movb %bl, %al
- 
 
 505 
	outb %al, %dx
- 
 
 506
- 
 
 507 
	cli
- 
 
 508 
	hlt
449
509
450 
.section K_DATA_START, "aw", @progbits
 510 
.section K_DATA_START, "aw", @progbits
451 
.align 4096
 511 
.align 4096
452 
 
 512 
 
453 
# Identical mapping of first 64MB and the same of -2GB -> 0
513 
# Identical mapping of first 64MB and the same of -2GB -> 0
Line 511... Line 571...
511 
grub_eax:
 571 
grub_eax:
512 
	.long 0
 572 
	.long 0
513 
 
 573 
 
514 
grub_ebx:
 574 
grub_ebx:
515 
	.long 0
 575 
	.long 0
- 
 
 576 
 
- 
 
 577 
long_mode_msg:
- 
 
 578 
	.ascii "64 bit long mode not supported. System halted.\0"