WebSVN – HelenOS – Diff – /trunk/kernel/arch/amd64/src/boot/boot.S


 
# Copyright (c) 2005 Ondrej Palkovsky
# Copyright (c) 2006 Martin Decky
# Copyright (c) 2008 Jakub Jermar
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
 
#include <arch/boot/boot.h>
#include <arch/boot/memmap.h>
#include <arch/mm/page.h>	
#include <arch/mm/ptl.h>
#include <arch/pm.h>
#include <arch/cpu.h>
#include <arch/cpuid.h>
 
#define START_STACK	(BOOT_OFFSET - BOOT_STACK_SIZE)
	
.section K_TEXT_START, "ax"
 
.code32
.align 4
.global multiboot_image_start
multiboot_header:
	.long MULTIBOOT_HEADER_MAGIC
	.long MULTIBOOT_HEADER_FLAGS
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
	.long multiboot_header
	.long unmapped_ktext_start
	.long 0
	.long 0
	.long multiboot_image_start
 
multiboot_image_start:
	movl $START_STACK, %esp			# initialize stack pointer
	lgdtl bootstrap_gdtr			# initialize Global Descriptor Table register
 
	movw $gdtselector(KDATA_DES), %cx
	movw %cx, %es
	movw %cx, %ds							# kernel data + stack
	movw %cx, %ss
	# Simics seems to remove hidden part of GS on entering user mode
	#  when _visible_ part of GS does not point to user-mode segment
	movw $gdtselector(UDATA_DES), %cx
	movw %cx, %fs
	movw %cx, %gs
	
	jmpl $gdtselector(KTEXT32_DES), $multiboot_meeting_point
	multiboot_meeting_point:
	
	movl %eax, grub_eax						# save parameters from GRUB
	movl %ebx, grub_ebx
	
	# Protected 32-bit. We want to reuse the code-seg descriptor,
	# the Default operand size must not be 1 when entering long mode
	
	movl $(INTEL_CPUID_EXTENDED), %eax  
 	cpuid
 	cmp $(INTEL_CPUID_EXTENDED), %eax
	ja extended_cpuid_supported
		
		movl $extended_cpuid_msg, %esi
		jmp error_halt
	
	extended_cpuid_supported:
	
	movl $(AMD_CPUID_EXTENDED), %eax
	cpuid
	bt $(AMD_EXT_LONG_MODE), %edx
 	jc long_mode_supported
		
		movl $long_mode_msg, %esi
		jmp error_halt
 
	long_mode_supported:
	
	bt $(AMD_EXT_NOEXECUTE), %edx
	jc noexecute_supported
	
		movl $noexecute_msg, %esi
		jmp error_halt
	
	noexecute_supported:
	
	movl $(INTEL_CPUID_STANDARD), %eax
	cpuid
	bt $(INTEL_FXSAVE), %edx
 	jc fx_supported
	
		movl $fx_msg, %esi
		jmp error_halt
	
	fx_supported:
	
	bt $(INTEL_SSE2), %edx
 	jc sse2_supported
	
		movl $sse2_msg, %esi
		jmp error_halt
	
	sse2_supported:
	
#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
	jmpl *%edi
	
	vesa_meeting_point:
	
	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	
	
	# Enable 64-bit page translation entries - CR4.PAE = 1.
	# Paging is not enabled until after long mode is enabled
	
	movl %cr4, %eax
	btsl $5, %eax
	movl %eax, %cr4
 
	# Set up paging tables
	
	leal ptl_0, %eax
	movl %eax, %cr3
	
	# Enable long mode
	
	movl $EFER_MSR_NUM, %ecx			# EFER MSR number
	rdmsr						# Read EFER
	btsl $AMD_LME_FLAG, %eax			# Set LME = 1
	wrmsr						# Write EFER
	
	# Enable paging to activate long mode (set CR0.PG = 1)
	
	movl %cr0, %eax
	btsl $31, %eax
	movl %eax, %cr0
	
	# At this point we are in compatibility mode
	
	jmpl $gdtselector(KTEXT_DES), $start64
 
.code64
start64:
	movq $(PA2KA(START_STACK)), %rsp
	movl grub_eax, %eax
	movl grub_ebx, %ebx
	
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax			# compare GRUB signature
	je valid_boot
		
		xorl %ecx, %ecx					# no memory size or map available
		movl %ecx, e801memorysize
		movl %ecx, e820counter
		
		jmp invalid_boot
		
	valid_boot:
		
		movl (%ebx), %eax				# ebx = physical address of struct multiboot_info
		
		bt $0, %eax					# mbi->flags[0] (mem_lower, mem_upper valid)
		jc mem_valid
			
			xorl %ecx, %ecx
			jmp mem_invalid
			
		mem_valid:
		movl 4(%ebx), %ecx				# mbi->mem_lower
		addl 8(%ebx), %ecx				# mbi->mem_upper
		
		mem_invalid:
		movl %ecx, e801memorysize
		
		bt $3, %eax					# mbi->flags[3] (mods_count, mods_addr valid)
		jc mods_valid
			
			xorq %rcx, %rcx
			movq %rcx, init
			jmp mods_end
		
		mods_valid:
		
		xorq %rcx, %rcx
		movl 20(%ebx), %ecx				# mbi->mods_count
		movq %rcx, init
		
		cmpl $0, %ecx
		je mods_end
		
		movl 24(%ebx), %esi				# mbi->mods_addr
		movq $init, %rdi
		
		mods_loop:
			
			xorq %rdx, %rdx
			movl 0(%esi), %edx			# mods->mod_start
			movq $0xffff800000000000, %r10
			addq %r10, %rdx
			movq %rdx, 8(%rdi)
			
			xorq %rdx, %rdx
			movl 4(%esi), %edx
			subl 0(%esi), %edx			# mods->mod_end - mods->mod_start
			movq %rdx, 16(%rdi)
			
			addl $16, %esi
			addq $16, %rdi
			
			loop mods_loop
			
		mods_end:
		
		bt $6, %eax					# mbi->flags[6] (mmap_length, mmap_addr valid)	
		jc mmap_valid
			
			xorl %edx, %edx
			jmp mmap_invalid
			
		mmap_valid:
		movl 44(%ebx), %ecx				# mbi->mmap_length
		movl 48(%ebx), %esi				# mbi->mmap_addr
		movq $e820table, %rdi
		xorl %edx, %edx
		
		mmap_loop:
			cmpl $0, %ecx
			jle mmap_end
			
			movl 4(%esi), %eax			# mmap->base_addr_low
			movl %eax, (%rdi)
			
			movl 8(%esi), %eax			# mmap->base_addr_high
			movl %eax, 4(%rdi)
			
			movl 12(%esi), %eax			# mmap->length_low
			movl %eax, 8(%rdi)
			
			movl 16(%esi), %eax			# mmap->length_high
			movl %eax, 12(%rdi)
			
			movl 20(%esi), %eax			# mmap->type
			movl %eax, 16(%rdi)
			
			movl (%esi), %eax			# mmap->size
			addl $0x4, %eax
			addl %eax, %esi
			subl %eax, %ecx
			addq $MEMMAP_E820_RECORD_SIZE, %rdi
			incl %edx
			jmp mmap_loop
		
		mmap_end:
		
		mmap_invalid:
		movl %edx, e820counter
		
	invalid_boot:
	
#ifdef CONFIG_SMP
	
	# copy AP bootstrap routines below 1 MB
	
	movq $BOOT_OFFSET, %rsi
	movq $AP_BOOT_OFFSET, %rdi
	movq $_hardcoded_unmapped_size, %rcx
	cld
	rep movsb
	
#endif
	
	call main_bsp   # never returns
	
	cli
	hlt
 
#ifdef CONFIG_FB
.code32
vesa_init:
	jmp $gdtselector(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 $VESA_INIT_SEGMENT, %bx
	
	mov %bx, %es
	mov %bx, %fs
	mov %bx, %gs
	mov %bx, %ds
	mov %bx, %ss
	
	movl $0x0000fffc, %esp
    movl $0x0000fffc, %ebp
	
#define VESA_INFO_SIZE 1024
 
#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_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 VESA_SET_PALETTE 0x4f09
 
#define CONFIG_VESA_BPP_a 255
 
#if CONFIG_VESA_BPP == 24
#define CONFIG_VESA_BPP_VARIANT 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
 
#ifdef CONFIG_VESA_BPP_VARIANT
	jz 2f
	
	mov $CONFIG_VESA_BPP_VARIANT, %al
	cmp VESA_MODE_BPP_OFFSET(%di), %al
#endif
	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
 
#if CONFIG_VESA_BPP == 8
	
	# Set 3:2:3 VGA palette
	
	mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax
	push %di
	mov $vga323 - vesa_init, %di
	mov $0x100, %ecx
	
	bt $5, %ax						# Test if VGA compatible registers are present
	jnc vga_compat
		
		# Try VESA routine to set palette
		
		mov $VESA_SET_PALETTE, %ax
		xor %bl, %bl
		xor %dx, %dx
		int $0x10
		
		jmp vga_not_compat
	
	vga_compat:
		
		# Try VGA registers to set palette
		
		movw $0x3c6, %dx				# Set palette mask
		movb $0xff, %al
		outb %al, %dx
		
		movw $0x3c8, %dx				# First index to set
		xor %al, %al
		outb %al, %dx
		
		movw $0x3c9, %dx				# Data port
		vga_loop:
			movb %es:2(%di), %al
			outb %al, %dx
			
			movb %es:1(%di), %al
			outb %al, %dx
			
			movb %es:(%di), %al
			outb %al, %dx
			
			addw $4, %di
			loop vga_loop
		
	vga_not_compat:
	
	pop %di
	
#endif
	
	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:
	
	ljmpl $gdtselector(KTEXT32_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
	
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
 
vga323:
#include "vga323.pal"	
	
.code32
vesa_init_protect:
	movw $gdtselector(KDATA_DES), %cx
	movw %cx, %es
	movw %cx, %ds					# kernel data + stack
	movw %cx, %ss
	# Simics seems to remove hidden part of GS on entering user mode
	#  when _visible_ part of GS does not point to user-mode segment
	movw $gdtselector(UDATA_DES), %cx
	movw %cx, %fs
	movw %cx, %gs
	
	movl $START_STACK, %esp				# initialize stack pointer
	
	jmpl $gdtselector(KTEXT32_DES), $vesa_meeting_point
	
.align 4
e_vesa_init:
#endif
 
# Print string from %esi to EGA display (in red) and halt
error_halt:
	movl $0xb8000, %edi				# base of EGA text mode memory
	xorl %eax, %eax
	
	movw $0x3d4, %dx				# read bits 8 - 15 of the cursor address
	movb $0xe, %al
	outb %al, %dx
	
	movw $0x3d5, %dx
	inb %dx, %al
	shl $8, %ax
	
	movw $0x3d4, %dx				# read bits 0 - 7 of the cursor address
	movb $0xf, %al
	outb %al, %dx
	
	movw $0x3d5, %dx
	inb %dx, %al
	
	cmp $1920, %ax
	jbe cursor_ok
		movw $1920, %ax				# sanity check for the cursor on the last line
	cursor_ok:
	
	movw %ax, %bx
	shl $1, %eax
	addl %eax, %edi
	
	movw $0x0c00, %ax				# black background, light red foreground
	cld
	
	ploop:
		lodsb
		cmp $0, %al
		je ploop_end
		stosw
		inc %bx	
		jmp ploop
	ploop_end:
	
	movw $0x3d4, %dx				# write bits 8 - 15 of the cursor address
	movb $0xe, %al
	outb %al, %dx
	
	movw $0x3d5, %dx
	movb %bh, %al
	outb %al, %dx
	
	movw $0x3d4, %dx				# write bits 0 - 7 of the cursor address
	movb $0xf, %al
	outb %al, %dx
	
	movw $0x3d5, %dx
	movb %bl, %al
	outb %al, %dx
		
	cli
	hlt
				
 
.section K_INI_PTLS, "aw", @progbits
 
#
# Macro for generating initial page table contents.
# @param cnt	Number of entries to generat. Must be multiple of 8.
# @param g	Number of GB that will be added to the mapping.
#
.macro ptl2gen cnt g 
.if \cnt
	ptl2gen "\cnt - 8" \g 
	.quad ((\cnt - 8) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad ((\cnt - 7) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad ((\cnt - 6) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad ((\cnt - 5) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad ((\cnt - 4) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad ((\cnt - 3) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad ((\cnt - 2) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad ((\cnt - 1) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
.endif
.endm
 
# Page table for pages in the first gigabyte.
.align 4096
.global ptl_2_0g
ptl_2_0g:	
	ptl2gen 512 0
 
# Page table for pages in the second gigabyte.
.align 4096
.global ptl_2_1g
ptl_2_1g:
	ptl2gen 512 1
 
# Page table for pages in the third gigabyte.
.align 4096
.global ptl_2_2g
ptl_2_2g:
	ptl2gen 512 2
 
# Page table for pages in the fourth gigabyte.
.align 4096
.global ptl_2_3g
ptl_2_3g:
	ptl2gen 512 3
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
.align 4096
.global ptl_1
ptl_1:
	# Identity mapping for [0; 4G)
	.quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT)
	.quad ptl_2_1g + (PTL_WRITABLE | PTL_PRESENT) 
	.quad ptl_2_2g + (PTL_WRITABLE | PTL_PRESENT)
	.quad ptl_2_3g + (PTL_WRITABLE | PTL_PRESENT)
	.fill 506, 8, 0
	# Mapping of [0; 1G) at -2G
	.quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT)
	.fill 1, 8, 0
	
.align 4096
.global ptl_0
ptl_0:
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
	.fill 255,8,0
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
	.fill 254,8,0
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
 
.section K_DATA_START, "aw", @progbits
 
.global bootstrap_gdtr
bootstrap_gdtr:
	.word gdtselector(GDT_ITEMS)
	.long KA2PA(gdt)
 
grub_eax:
	.long 0
 
grub_ebx:
	.long 0
 
extended_cpuid_msg:
	.asciz "Extended CPUID not supported. System halted."
long_mode_msg:
	.asciz "64 bit long mode not supported. System halted."
noexecute_msg:
	.asciz "No-execute pages not supported. System halted."
fx_msg:
	.asciz "FXSAVE/FXRESTORE instructions not supported. System halted."
sse2_msg:
	.asciz "SSE2 instructions not supported. System halted."
 

Rev 2692	Rev 2703
1		1
2	# Copyright (c) 2005 Ondrej Palkovsky	2	# Copyright (c) 2005 Ondrej Palkovsky
3	# Copyright (c) 2006 Martin Decky	3	# Copyright (c) 2006 Martin Decky
-		4	# Copyright (c) 2008 Jakub Jermar
4	# All rights reserved.	5	# All rights reserved.
5	#	6	#
6	# Redistribution and use in source and binary forms, with or without	7	# Redistribution and use in source and binary forms, with or without
7	# modification, are permitted provided that the following conditions	8	# modification, are permitted provided that the following conditions
8	# are met:	9	# are met:
9	#	10	#
10	# - Redistributions of source code must retain the above copyright	11	# - Redistributions of source code must retain the above copyright
11	# notice, this list of conditions and the following disclaimer.	12	# notice, this list of conditions and the following disclaimer.
12	# - Redistributions in binary form must reproduce the above copyright	13	# - Redistributions in binary form must reproduce the above copyright
13	# notice, this list of conditions and the following disclaimer in the	14	# notice, this list of conditions and the following disclaimer in the
14	# documentation and/or other materials provided with the distribution.	15	# documentation and/or other materials provided with the distribution.
15	# - The name of the author may not be used to endorse or promote products	16	# - The name of the author may not be used to endorse or promote products
16	# derived from this software without specific prior written permission.	17	# derived from this software without specific prior written permission.
17	#	18	#
18	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	19	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	20	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	21	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	22	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	23	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	24	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	25	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	26	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	27	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	28	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	#	29	#
29		30
30	#include <arch/boot/boot.h>	31	#include <arch/boot/boot.h>
31	#include <arch/boot/memmap.h>	32	#include <arch/boot/memmap.h>
32	#include <arch/mm/page.h>	33	#include <arch/mm/page.h>
33	#include <arch/mm/ptl.h>	34	#include <arch/mm/ptl.h>
34	#include <arch/pm.h>	35	#include <arch/pm.h>
35	#include <arch/cpu.h>	36	#include <arch/cpu.h>
36	#include <arch/cpuid.h>	37	#include <arch/cpuid.h>
37		38
38	#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)	39	#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
39		40
40	.section K_TEXT_START, "ax"	41	.section K_TEXT_START, "ax"
41		42
42	.code32	43	.code32
43	.align 4	44	.align 4
44	.global multiboot_image_start	45	.global multiboot_image_start
45	multiboot_header:	46	multiboot_header:
46	.long MULTIBOOT_HEADER_MAGIC	47	.long MULTIBOOT_HEADER_MAGIC
47	.long MULTIBOOT_HEADER_FLAGS	48	.long MULTIBOOT_HEADER_FLAGS
48	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum	49	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum
49	.long multiboot_header	50	.long multiboot_header
50	.long unmapped_ktext_start	51	.long unmapped_ktext_start
51	.long 0	52	.long 0
52	.long 0	53	.long 0
53	.long multiboot_image_start	54	.long multiboot_image_start
54		55
55	multiboot_image_start:	56	multiboot_image_start:
56	movl $START_STACK, %esp # initialize stack pointer	57	movl $START_STACK, %esp # initialize stack pointer
57	lgdt bootstrap_gdtr # initialize Global Descriptor Table register	58	lgdtl bootstrap_gdtr # initialize Global Descriptor Table register
58		59
59	movw $gdtselector(KDATA_DES), %cx	60	movw $gdtselector(KDATA_DES), %cx
60	movw %cx, %es	61	movw %cx, %es
61	movw %cx, %ds # kernel data + stack	62	movw %cx, %ds # kernel data + stack
62	movw %cx, %ss	63	movw %cx, %ss
63	# Simics seems to remove hidden part of GS on entering user mode	64	# Simics seems to remove hidden part of GS on entering user mode
64	# when _visible_ part of GS does not point to user-mode segment	65	# when _visible_ part of GS does not point to user-mode segment
65	movw $gdtselector(UDATA_DES), %cx	66	movw $gdtselector(UDATA_DES), %cx
66	movw %cx, %fs	67	movw %cx, %fs
67	movw %cx, %gs	68	movw %cx, %gs
68		69
69	jmpl $gdtselector(KTEXT32_DES), $multiboot_meeting_point	70	jmpl $gdtselector(KTEXT32_DES), $multiboot_meeting_point
70	multiboot_meeting_point:	71	multiboot_meeting_point:
71		72
72	movl %eax, grub_eax # save parameters from GRUB	73	movl %eax, grub_eax # save parameters from GRUB
73	movl %ebx, grub_ebx	74	movl %ebx, grub_ebx
74		75
75	# Protected 32-bit. We want to reuse the code-seg descriptor,	76	# 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	# the Default operand size must not be 1 when entering long mode
77		78
78	movl $(INTEL_CPUID_EXTENDED), %eax	79	movl $(INTEL_CPUID_EXTENDED), %eax
79	cpuid	80	cpuid
80	cmp $(INTEL_CPUID_EXTENDED), %eax	81	cmp $(INTEL_CPUID_EXTENDED), %eax
81	ja extended_cpuid_supported	82	ja extended_cpuid_supported
82		83
83	movl $extended_cpuid_msg, %esi	84	movl $extended_cpuid_msg, %esi
84	jmp error_halt	85	jmp error_halt
85		86
86	extended_cpuid_supported:	87	extended_cpuid_supported:
87		88
88	movl $(AMD_CPUID_EXTENDED), %eax	89	movl $(AMD_CPUID_EXTENDED), %eax
89	cpuid	90	cpuid
90	bt $(AMD_EXT_LONG_MODE), %edx	91	bt $(AMD_EXT_LONG_MODE), %edx
91	jc long_mode_supported	92	jc long_mode_supported
92		93
93	movl $long_mode_msg, %esi	94	movl $long_mode_msg, %esi
94	jmp error_halt	95	jmp error_halt
95		96
96	long_mode_supported:	97	long_mode_supported:
97		98
98	bt $(AMD_EXT_NOEXECUTE), %edx	99	bt $(AMD_EXT_NOEXECUTE), %edx
99	jc noexecute_supported	100	jc noexecute_supported
100		101
101	movl $noexecute_msg, %esi	102	movl $noexecute_msg, %esi
102	jmp error_halt	103	jmp error_halt
103		104
104	noexecute_supported:	105	noexecute_supported:
105		106
106	movl $(INTEL_CPUID_STANDARD), %eax	107	movl $(INTEL_CPUID_STANDARD), %eax
107	cpuid	108	cpuid
108	bt $(INTEL_FXSAVE), %edx	109	bt $(INTEL_FXSAVE), %edx
109	jc fx_supported	110	jc fx_supported
110		111
111	movl $fx_msg, %esi	112	movl $fx_msg, %esi
112	jmp error_halt	113	jmp error_halt
113		114
114	fx_supported:	115	fx_supported:
115		116
116	bt $(INTEL_SSE2), %edx	117	bt $(INTEL_SSE2), %edx
117	jc sse2_supported	118	jc sse2_supported
118		119
119	movl $sse2_msg, %esi	120	movl $sse2_msg, %esi
120	jmp error_halt	121	jmp error_halt
121		122
122	sse2_supported:	123	sse2_supported:
123		124
124	#ifdef CONFIG_FB	125	#ifdef CONFIG_FB
125	mov $vesa_init, %esi	126	mov $vesa_init, %esi
126	mov $VESA_INIT_SEGMENT << 4, %edi	127	mov $VESA_INIT_SEGMENT << 4, %edi
127	mov $e_vesa_init - vesa_init, %ecx	128	mov $e_vesa_init - vesa_init, %ecx
128	cld	129	cld
129	rep movsb	130	rep movsb
130		131
131	mov $VESA_INIT_SEGMENT << 4, %edi	132	mov $VESA_INIT_SEGMENT << 4, %edi
132	jmpl *%edi	133	jmpl *%edi
133		134
134	vesa_meeting_point:	135	vesa_meeting_point:
135		136
136	mov %esi, KA2PA(vesa_ph_addr)	137	mov %esi, KA2PA(vesa_ph_addr)
137	mov %di, KA2PA(vesa_height)	138	mov %di, KA2PA(vesa_height)
138	shr $16, %edi	139	shr $16, %edi
139	mov %di, KA2PA(vesa_width)	140	mov %di, KA2PA(vesa_width)
140	mov %bx, KA2PA(vesa_scanline)	141	mov %bx, KA2PA(vesa_scanline)
141	shr $16, %ebx	142	shr $16, %ebx
142	mov %bx, KA2PA(vesa_bpp)	143	mov %bx, KA2PA(vesa_bpp)
143	#endif	144	#endif
144		145
145	# Enable 64-bit page translation entries - CR4.PAE = 1.	146	# Enable 64-bit page translation entries - CR4.PAE = 1.
146	# Paging is not enabled until after long mode is enabled	147	# Paging is not enabled until after long mode is enabled
147		148
148	movl %cr4, %eax	149	movl %cr4, %eax
149	btsl $5, %eax	150	btsl $5, %eax
150	movl %eax, %cr4	151	movl %eax, %cr4
151		152
152	# Set up paging tables	153	# Set up paging tables
153		154
154	leal ptl_0, %eax	155	leal ptl_0, %eax
155	movl %eax, %cr3	156	movl %eax, %cr3
156		157
157	# Enable long mode	158	# Enable long mode
158		159
159	movl $EFER_MSR_NUM, %ecx # EFER MSR number	160	movl $EFER_MSR_NUM, %ecx # EFER MSR number
160	rdmsr # Read EFER	161	rdmsr # Read EFER
161	btsl $AMD_LME_FLAG, %eax # Set LME = 1	162	btsl $AMD_LME_FLAG, %eax # Set LME = 1
162	wrmsr # Write EFER	163	wrmsr # Write EFER
163		164
164	# Enable paging to activate long mode (set CR0.PG = 1)	165	# Enable paging to activate long mode (set CR0.PG = 1)
165		166
166	movl %cr0, %eax	167	movl %cr0, %eax
167	btsl $31, %eax	168	btsl $31, %eax
168	movl %eax, %cr0	169	movl %eax, %cr0
169		170
170	# At this point we are in compatibility mode	171	# At this point we are in compatibility mode
171		172
172	jmpl $gdtselector(KTEXT_DES), $start64	173	jmpl $gdtselector(KTEXT_DES), $start64
173		174
174	.code64	175	.code64
175	start64:	176	start64:
176	movq $(PA2KA(START_STACK)), %rsp	177	movq $(PA2KA(START_STACK)), %rsp
177	movl grub_eax, %eax	178	movl grub_eax, %eax
178	movl grub_ebx, %ebx	179	movl grub_ebx, %ebx
179		180
180	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature	181	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature
181	je valid_boot	182	je valid_boot
182		183
183	xorl %ecx, %ecx # no memory size or map available	184	xorl %ecx, %ecx # no memory size or map available
184	movl %ecx, e801memorysize	185	movl %ecx, e801memorysize
185	movl %ecx, e820counter	186	movl %ecx, e820counter
186		187
187	jmp invalid_boot	188	jmp invalid_boot
188		189
189	valid_boot:	190	valid_boot:
190		191
191	movl (%ebx), %eax # ebx = physical address of struct multiboot_info	192	movl (%ebx), %eax # ebx = physical address of struct multiboot_info
192		193
193	bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)	194	bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)
194	jc mem_valid	195	jc mem_valid
195		196
196	xorl %ecx, %ecx	197	xorl %ecx, %ecx
197	jmp mem_invalid	198	jmp mem_invalid
198		199
199	mem_valid:	200	mem_valid:
200	movl 4(%ebx), %ecx # mbi->mem_lower	201	movl 4(%ebx), %ecx # mbi->mem_lower
201	addl 8(%ebx), %ecx # mbi->mem_upper	202	addl 8(%ebx), %ecx # mbi->mem_upper
202		203
203	mem_invalid:	204	mem_invalid:
204	movl %ecx, e801memorysize	205	movl %ecx, e801memorysize
205		206
206	bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)	207	bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)
207	jc mods_valid	208	jc mods_valid
208		209
209	xorq %rcx, %rcx	210	xorq %rcx, %rcx
210	movq %rcx, init	211	movq %rcx, init
211	jmp mods_end	212	jmp mods_end
212		213
213	mods_valid:	214	mods_valid:
214		215
215	xorq %rcx, %rcx	216	xorq %rcx, %rcx
216	movl 20(%ebx), %ecx # mbi->mods_count	217	movl 20(%ebx), %ecx # mbi->mods_count
217	movq %rcx, init	218	movq %rcx, init
218		219
219	cmpl $0, %ecx	220	cmpl $0, %ecx
220	je mods_end	221	je mods_end
221		222
222	movl 24(%ebx), %esi # mbi->mods_addr	223	movl 24(%ebx), %esi # mbi->mods_addr
223	movq $init, %rdi	224	movq $init, %rdi
224		225
225	mods_loop:	226	mods_loop:
226		227
227	xorq %rdx, %rdx	228	xorq %rdx, %rdx
228	movl 0(%esi), %edx # mods->mod_start	229	movl 0(%esi), %edx # mods->mod_start
229	movq $0xffff800000000000, %r10	230	movq $0xffff800000000000, %r10
230	addq %r10, %rdx	231	addq %r10, %rdx
231	movq %rdx, 8(%rdi)	232	movq %rdx, 8(%rdi)
232		233
233	xorq %rdx, %rdx	234	xorq %rdx, %rdx
234	movl 4(%esi), %edx	235	movl 4(%esi), %edx
235	subl 0(%esi), %edx # mods->mod_end - mods->mod_start	236	subl 0(%esi), %edx # mods->mod_end - mods->mod_start
236	movq %rdx, 16(%rdi)	237	movq %rdx, 16(%rdi)
237		238
238	addl $16, %esi	239	addl $16, %esi
239	addq $16, %rdi	240	addq $16, %rdi
240		241
241	loop mods_loop	242	loop mods_loop
242		243
243	mods_end:	244	mods_end:
244		245
245	bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)	246	bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)
246	jc mmap_valid	247	jc mmap_valid
247		248
248	xorl %edx, %edx	249	xorl %edx, %edx
249	jmp mmap_invalid	250	jmp mmap_invalid
250		251
251	mmap_valid:	252	mmap_valid:
252	movl 44(%ebx), %ecx # mbi->mmap_length	253	movl 44(%ebx), %ecx # mbi->mmap_length
253	movl 48(%ebx), %esi # mbi->mmap_addr	254	movl 48(%ebx), %esi # mbi->mmap_addr
254	movq $e820table, %rdi	255	movq $e820table, %rdi
255	xorl %edx, %edx	256	xorl %edx, %edx
256		257
257	mmap_loop:	258	mmap_loop:
258	cmpl $0, %ecx	259	cmpl $0, %ecx
259	jle mmap_end	260	jle mmap_end
260		261
261	movl 4(%esi), %eax # mmap->base_addr_low	262	movl 4(%esi), %eax # mmap->base_addr_low
262	movl %eax, (%rdi)	263	movl %eax, (%rdi)
263		264
264	movl 8(%esi), %eax # mmap->base_addr_high	265	movl 8(%esi), %eax # mmap->base_addr_high
265	movl %eax, 4(%rdi)	266	movl %eax, 4(%rdi)
266		267
267	movl 12(%esi), %eax # mmap->length_low	268	movl 12(%esi), %eax # mmap->length_low
268	movl %eax, 8(%rdi)	269	movl %eax, 8(%rdi)
269		270
270	movl 16(%esi), %eax # mmap->length_high	271	movl 16(%esi), %eax # mmap->length_high
271	movl %eax, 12(%rdi)	272	movl %eax, 12(%rdi)
272		273
273	movl 20(%esi), %eax # mmap->type	274	movl 20(%esi), %eax # mmap->type
274	movl %eax, 16(%rdi)	275	movl %eax, 16(%rdi)
275		276
276	movl (%esi), %eax # mmap->size	277	movl (%esi), %eax # mmap->size
277	addl $0x4, %eax	278	addl $0x4, %eax
278	addl %eax, %esi	279	addl %eax, %esi
279	subl %eax, %ecx	280	subl %eax, %ecx
280	addq $MEMMAP_E820_RECORD_SIZE, %rdi	281	addq $MEMMAP_E820_RECORD_SIZE, %rdi
281	incl %edx	282	incl %edx
282	jmp mmap_loop	283	jmp mmap_loop
283		284
284	mmap_end:	285	mmap_end:
285		286
286	mmap_invalid:	287	mmap_invalid:
287	movl %edx, e820counter	288	movl %edx, e820counter
288		289
289	invalid_boot:	290	invalid_boot:
290		291
291	#ifdef CONFIG_SMP	292	#ifdef CONFIG_SMP
292		293
293	# copy AP bootstrap routines below 1 MB	294	# copy AP bootstrap routines below 1 MB
294		295
295	movq $BOOT_OFFSET, %rsi	296	movq $BOOT_OFFSET, %rsi
296	movq $AP_BOOT_OFFSET, %rdi	297	movq $AP_BOOT_OFFSET, %rdi
297	movq $_hardcoded_unmapped_size, %rcx	298	movq $_hardcoded_unmapped_size, %rcx
298	cld	299	cld
299	rep movsb	300	rep movsb
300		301
301	#endif	302	#endif
302		303
303	call main_bsp # never returns	304	call main_bsp # never returns
304		305
305	cli	306	cli
306	hlt	307	hlt
307		308
308	#ifdef CONFIG_FB	309	#ifdef CONFIG_FB
309	.code32	310	.code32
310	vesa_init:	311	vesa_init:
311	jmp $gdtselector(VESA_INIT_DES), $vesa_init_real - vesa_init	312	jmp $gdtselector(VESA_INIT_DES), $vesa_init_real - vesa_init
312		313
313	.code16	314	.code16
314	vesa_init_real:	315	vesa_init_real:
315		316
316	mov %cr0, %eax	317	mov %cr0, %eax
317	and $~1, %eax	318	and $~1, %eax
318	mov %eax, %cr0	319	mov %eax, %cr0
319		320
320	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init	321	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
321		322
322	vesa_init_real2:	323	vesa_init_real2:
323		324
324	mov $VESA_INIT_SEGMENT, %bx	325	mov $VESA_INIT_SEGMENT, %bx
325		326
326	mov %bx, %es	327	mov %bx, %es
327	mov %bx, %fs	328	mov %bx, %fs
328	mov %bx, %gs	329	mov %bx, %gs
329	mov %bx, %ds	330	mov %bx, %ds
330	mov %bx, %ss	331	mov %bx, %ss
331		332
332	movl $0x0000fffc, %esp	333	movl $0x0000fffc, %esp
333	movl $0x0000fffc, %ebp	334	movl $0x0000fffc, %ebp
334		335
335	#define VESA_INFO_SIZE 1024	336	#define VESA_INFO_SIZE 1024
336		337
337	#define VESA_MODE_ATTRIBUTES_OFFSET 0	338	#define VESA_MODE_ATTRIBUTES_OFFSET 0
338	#define VESA_MODE_LIST_PTR_OFFSET 14	339	#define VESA_MODE_LIST_PTR_OFFSET 14
339	#define VESA_MODE_SCANLINE_OFFSET 16	340	#define VESA_MODE_SCANLINE_OFFSET 16
340	#define VESA_MODE_WIDTH_OFFSET 18	341	#define VESA_MODE_WIDTH_OFFSET 18
341	#define VESA_MODE_HEIGHT_OFFSET 20	342	#define VESA_MODE_HEIGHT_OFFSET 20
342	#define VESA_MODE_BPP_OFFSET 25	343	#define VESA_MODE_BPP_OFFSET 25
343	#define VESA_MODE_PHADDR_OFFSET 40	344	#define VESA_MODE_PHADDR_OFFSET 40
344		345
345	#define VESA_END_OF_MODES 0xffff	346	#define VESA_END_OF_MODES 0xffff
346		347
347	#define VESA_OK 0x4f	348	#define VESA_OK 0x4f
348		349
349	#define VESA_GET_INFO 0x4f00	350	#define VESA_GET_INFO 0x4f00
350	#define VESA_GET_MODE_INFO 0x4f01	351	#define VESA_GET_MODE_INFO 0x4f01
351	#define VESA_SET_MODE 0x4f02	352	#define VESA_SET_MODE 0x4f02
352	#define VESA_SET_PALETTE 0x4f09	353	#define VESA_SET_PALETTE 0x4f09
353		354
354	#define CONFIG_VESA_BPP_a 255	355	#define CONFIG_VESA_BPP_a 255
355		356
356	#if CONFIG_VESA_BPP == 24	357	#if CONFIG_VESA_BPP == 24
357	#define CONFIG_VESA_BPP_VARIANT 32	358	#define CONFIG_VESA_BPP_VARIANT 32
358	#endif	359	#endif
359		360
360	mov $VESA_GET_INFO, %ax	361	mov $VESA_GET_INFO, %ax
361	mov $e_vesa_init - vesa_init, %di	362	mov $e_vesa_init - vesa_init, %di
362	push %di	363	push %di
363	int $0x10	364	int $0x10
364		365
365	pop %di	366	pop %di
366	cmp $VESA_OK, %al	367	cmp $VESA_OK, %al
367	jnz 0f	368	jnz 0f
368		369
369	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si	370	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
370	mov %si, %gs	371	mov %si, %gs
371	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si	372	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
372		373
373	add $VESA_INFO_SIZE, %di	374	add $VESA_INFO_SIZE, %di
374		375
375	1:# Try next mode	376	1:# Try next mode
376	mov %gs:(%si), %cx	377	mov %gs:(%si), %cx
377	cmp $VESA_END_OF_MODES, %cx	378	cmp $VESA_END_OF_MODES, %cx
378	jz 0f	379	jz 0f
379		380
380	inc %si	381	inc %si
381	inc %si	382	inc %si
382	push %cx	383	push %cx
383	push %di	384	push %di
384	push %si	385	push %si
385	mov $VESA_GET_MODE_INFO, %ax	386	mov $VESA_GET_MODE_INFO, %ax
386	int $0x10	387	int $0x10
387		388
388	pop %si	389	pop %si
389	pop %di	390	pop %di
390	pop %cx	391	pop %cx
391	cmp $VESA_OK, %al	392	cmp $VESA_OK, %al
392	jnz 0f	393	jnz 0f
393		394
394	mov $CONFIG_VESA_WIDTH, %ax	395	mov $CONFIG_VESA_WIDTH, %ax
395	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax	396	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
396	jnz 1b	397	jnz 1b
397		398
398	mov $CONFIG_VESA_HEIGHT, %ax	399	mov $CONFIG_VESA_HEIGHT, %ax
399	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax	400	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
400	jnz 1b	401	jnz 1b
401		402
402	mov $CONFIG_VESA_BPP, %al	403	mov $CONFIG_VESA_BPP, %al
403	cmp VESA_MODE_BPP_OFFSET(%di), %al	404	cmp VESA_MODE_BPP_OFFSET(%di), %al
404		405
405	#ifdef CONFIG_VESA_BPP_VARIANT	406	#ifdef CONFIG_VESA_BPP_VARIANT
406	jz 2f	407	jz 2f
407		408
408	mov $CONFIG_VESA_BPP_VARIANT, %al	409	mov $CONFIG_VESA_BPP_VARIANT, %al
409	cmp VESA_MODE_BPP_OFFSET(%di), %al	410	cmp VESA_MODE_BPP_OFFSET(%di), %al
410	#endif	411	#endif
411	jnz 1b	412	jnz 1b
412		413
413	2:	414	2:
414		415
415	mov %cx, %bx	416	mov %cx, %bx
416	or $0xc000, %bx	417	or $0xc000, %bx
417	push %di	418	push %di
418	mov $VESA_SET_MODE, %ax	419	mov $VESA_SET_MODE, %ax
419	int $0x10	420	int $0x10
420		421
421	pop %di	422	pop %di
422	cmp $VESA_OK, %al	423	cmp $VESA_OK, %al
423	jnz 0f	424	jnz 0f
424		425
425	#if CONFIG_VESA_BPP == 8	426	#if CONFIG_VESA_BPP == 8
426		427
427	# Set 3:2:3 VGA palette	428	# Set 3:2:3 VGA palette
428		429
429	mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax	430	mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax
430	push %di	431	push %di
431	mov $vga323 - vesa_init, %di	432	mov $vga323 - vesa_init, %di
432	mov $0x100, %ecx	433	mov $0x100, %ecx
433		434
434	bt $5, %ax # Test if VGA compatible registers are present	435	bt $5, %ax # Test if VGA compatible registers are present
435	jnc vga_compat	436	jnc vga_compat
436		437
437	# Try VESA routine to set palette	438	# Try VESA routine to set palette
438		439
439	mov $VESA_SET_PALETTE, %ax	440	mov $VESA_SET_PALETTE, %ax
440	xor %bl, %bl	441	xor %bl, %bl
441	xor %dx, %dx	442	xor %dx, %dx
442	int $0x10	443	int $0x10
443		444
444	jmp vga_not_compat	445	jmp vga_not_compat
445		446
446	vga_compat:	447	vga_compat:
447		448
448	# Try VGA registers to set palette	449	# Try VGA registers to set palette
449		450
450	movw $0x3c6, %dx # Set palette mask	451	movw $0x3c6, %dx # Set palette mask
451	movb $0xff, %al	452	movb $0xff, %al
452	outb %al, %dx	453	outb %al, %dx
453		454
454	movw $0x3c8, %dx # First index to set	455	movw $0x3c8, %dx # First index to set
455	xor %al, %al	456	xor %al, %al
456	outb %al, %dx	457	outb %al, %dx
457		458
458	movw $0x3c9, %dx # Data port	459	movw $0x3c9, %dx # Data port
459	vga_loop:	460	vga_loop:
460	movb %es:2(%di), %al	461	movb %es:2(%di), %al
461	outb %al, %dx	462	outb %al, %dx
462		463
463	movb %es:1(%di), %al	464	movb %es:1(%di), %al
464	outb %al, %dx	465	outb %al, %dx
465		466
466	movb %es:(%di), %al	467	movb %es:(%di), %al
467	outb %al, %dx	468	outb %al, %dx
468		469
469	addw $4, %di	470	addw $4, %di
470	loop vga_loop	471	loop vga_loop
471		472
472	vga_not_compat:	473	vga_not_compat:
473		474
474	pop %di	475	pop %di
475		476
476	#endif	477	#endif
477		478
478	mov VESA_MODE_PHADDR_OFFSET(%di), %esi	479	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
479	mov VESA_MODE_WIDTH_OFFSET(%di), %ax	480	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
480	shl $16, %eax	481	shl $16, %eax
481	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax	482	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
482	mov VESA_MODE_BPP_OFFSET(%di), %bl	483	mov VESA_MODE_BPP_OFFSET(%di), %bl
483	xor %bh, %bh	484	xor %bh, %bh
484	shl $16, %ebx	485	shl $16, %ebx
485	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx	486	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
486	mov %eax, %edi	487	mov %eax, %edi
487		488
488	8:	489	8:
489		490
490	mov %cr0, %eax	491	mov %cr0, %eax
491	or $1, %eax	492	or $1, %eax
492	mov %eax, %cr0	493	mov %eax, %cr0
493		494
494	jmp 9f	495	jmp 9f
495	9:	496	9:
496		497
497	ljmpl $gdtselector(KTEXT32_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)	498	ljmpl $gdtselector(KTEXT32_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
498		499
499	0:# No prefered mode found	500	0:# No prefered mode found

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/amd64/src/boot/boot.S – Rev 2692 → 2703