WebSVN – HelenOS – Diff – /branches/network/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.
+#
 #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_MAGIC + MULTIBOOT_HEADER_FLAGS)  # checksum
 	.long multiboot_header
 	.long unmapped_ktext_start
 	.long 0
 	.long 0
 	.long multiboot_image_start
 multiboot_image_start:
 	cld
-	movl $START_STACK, %esp			# initialize stack pointer
+	movl $START_STACK, %esp             # initialize stack pointer
-	lgdtl bootstrap_gdtr			# initialize Global Descriptor Table register
+	lgdtl bootstrap_gdtr                # initialize Global Descriptor Table register
 	movw $gdtselector(KDATA_DES), %cx
 	movw %cx, %es
-	movw %cx, %ds							# kernel data + stack
+	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
+	# 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 %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
+	# the Default operand size must not be 1 when entering long mode.
+	#
 	movl $(INTEL_CPUID_EXTENDED), %eax
- 	cpuid
+	cpuid
- 	cmp $(INTEL_CPUID_EXTENDED), %eax
+	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
+	jc long_mode_supported
 		movl $long_mode_msg, %esi
 		jmp error_halt
 	long_mode_supported:
 	bt $(AMD_EXT_NOEXECUTE), %edx
 	jc noexecute_supported
 	noexecute_supported:
 	movl $(INTEL_CPUID_STANDARD), %eax
 	cpuid
 	bt $(INTEL_FXSAVE), %edx
- 	jc fx_supported
+	jc fx_supported
 		movl $fx_msg, %esi
 		jmp error_halt
 	fx_supported:
 	bt $(INTEL_SSE2), %edx
- 	jc sse2_supported
+	jc sse2_supported
 		movl $sse2_msg, %esi
 		jmp error_halt
 	sse2_supported:
-#ifdef CONFIG_FB
-	mov $vesa_init, %esi
+#include "vesa_prot.inc"
-	mov $VESA_INIT_SEGMENT << 4, %edi
-	mov $e_vesa_init - vesa_init, %ecx
-	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
+	# Paging is not enabled until after long mode is enabled.
+	#
 	movl %cr4, %eax
 	btsl $5, %eax
 	movl %eax, %cr4
-	# Set up paging tables
+	# set up paging tables
 	leal ptl_0, %eax
 	movl %eax, %cr3
-	# Enable long mode
+	# enable long mode
-	movl $EFER_MSR_NUM, %ecx			# EFER MSR number
+	movl $EFER_MSR_NUM, %ecx            # EFER MSR number
-	rdmsr						# Read EFER
+	rdmsr                               # read EFER
-	btsl $AMD_LME_FLAG, %eax			# Set LME = 1
+	btsl $AMD_LME_FLAG, %eax            # set LME = 1
-	wrmsr						# Write EFER
+	wrmsr                               # write EFER
-	# Enable paging to activate long mode (set CR0.PG = 1)
+	# 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
+	# 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, e820counter
-		jmp invalid_boot
-	valid_boot:
-		movl (%ebx), %eax				# ebx = physical address of struct multiboot_info
-		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
+	# call arch_pre_main(grub_eax, grub_ebx)
-		movq $init, %rdi
-		mods_loop:
-			xorq %rdx, %rdx
+	xorq %rdi, %rdi
-			movl 0(%esi), %edx			# mods->mod_start
-			movq $0xffff800000000000, %r10
-			addq %r10, %rdx
-			movq %rdx, 8(%rdi)
+	movl grub_eax, %edi
-			xorq %rdx, %rdx
+	xorq %rsi, %rsi
-			movl 4(%esi), %edx
+	movl grub_ebx, %esi
-			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
+	call arch_pre_main
-			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
-	rep movsb
-#endif
+	call main_bsp
-	call main_bsp   # never returns
+	# not reached
 	cli
-	hlt
+	hlt0:
-#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
-:# 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
-:
-	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
+		hlt
-			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
-:
-	mov %cr0, %eax
-	or $1, %eax
-	mov %eax, %cr0
-	jmp 9f
+		jmp hlt0
-:
-	ljmpl $gdtselector(KTEXT32_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
-:# 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
-:
-	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
+	movl $0xb8000, %edi       # base of EGA text mode memory
 	xorl %eax, %eax
-	movw $0x3d4, %dx				# read bits 8 - 15 of the cursor address
+	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
+	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
+		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
+	movw $0x0c00, %ax         # black background, light red foreground
 	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
+	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
+	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
+	hlt1:
+		hlt
+		jmp hlt1
+#include "vesa_real.inc"
 .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 cnt Number of entries to generat. Must be multiple of 8.
-# @param g	Number of GB that will be added to the mapping.
+# @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 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

Subversion Repositories HelenOS

(root)/branches/network/kernel/arch/amd64/src/boot/boot.S – Rev 3386 → 4153