WebSVN – HelenOS – Diff – /branches/dd/kernel/arch/ia32/src/boot/boot.S

+#
 # Copyright (c) 2001-2004 Jakub Jermar
 # Copyright (c) 2005-2006 Martin Decky
 # 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/pm.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:
 	cld
 	movl $START_STACK, %esp			# initialize stack pointer
 	lgdt KA2PA(bootstrap_gdtr)		# initialize Global Descriptor Table register
 	movw $selector(KDATA_DES), %cx
 	movw %cx, %es
 	movw %cx, %fs
 	movw %cx, %gs
 	movw %cx, %ds					# kernel data + stack
 	movw %cx, %ss
 	jmpl $selector(KTEXT_DES), $multiboot_meeting_point
 	multiboot_meeting_point:
 	movl %eax, grub_eax					# save parameters from GRUB
 	movl %ebx, grub_ebx
 	xorl %eax, %eax
  	cpuid
  	cmp $0x0, %eax						# any function > 0?
 	jbe pse_unsupported
 	movl $0x1, %eax						# Basic function code 1
 	cpuid
 	bt $3, %edx							# Test if PSE is supported
 	jc pse_supported
 	pse_unsupported:
 		movl $pse_msg, %esi
 		jmp error_halt
 	pse_supported:
 #ifdef CONFIG_FB
 	mov $vesa_init, %esi
 	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
 	call map_kernel							# map kernel and turn paging on
+	# arch_pre_main(grub_eax, grub_ebx)
+	pushl grub_ebx
+	pushl grub_eax
+	call arch_pre_main
-	movl grub_eax, %eax
-	movl grub_ebx, %ebx
-	cmpl $MULTIBOOT_LOADER_MAGIC, %eax				# compare GRUB signature
-	je valid_boot
-		xorl %ecx, %ecx							# no memory 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
-			xorl %ecx, %ecx
-			movl %ecx, init
-			jmp mods_end
-		mods_valid:
-		movl 20(%ebx), %ecx						# mbi->mods_count
-		movl %ecx, init
-		cmpl $0, %ecx
-		je mods_end
-		movl 24(%ebx), %esi						# mbi->mods_addr
-		movl $init, %edi
-		mods_loop:
-			movl 0(%esi), %edx					# mods->mod_start
-			addl $0x80000000, %edx
-			movl %edx, 4(%edi)
-			movl 4(%esi), %edx
-			subl 0(%esi), %edx					# mods->mod_end - mods->mod_start
-			movl %edx, 8(%edi)
-			addl $16, %esi
-			addl $8	, %edi
-			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
-		movl $e820table, %edi
-		xorl %edx, %edx
-		mmap_loop:
-			cmpl $0, %ecx
-			jle mmap_end
+	call main_bsp
-			movl 4(%esi), %eax					# mmap->base_addr_low
-			movl %eax, (%edi)
-			movl 8(%esi), %eax					# mmap->base_addr_high
-			movl %eax, 4(%edi)
-			movl 12(%esi), %eax					# mmap->length_low
-			movl %eax, 8(%edi)
-			movl 16(%esi), %eax					# mmap->length_high
-			movl %eax, 12(%edi)
-			movl 20(%esi), %eax					# mmap->type
-			movl %eax, 16(%edi)
-			movl (%esi), %eax					# mmap->size
-			addl $0x4, %eax
-			addl %eax, %esi
-			subl %eax, %ecx
-			addl $MEMMAP_E820_RECORD_SIZE, %edi
-			incl %edx
-			jmp mmap_loop
-		mmap_end:
-		mmap_invalid:
-		movl %edx, e820counter
-	invalid_boot:
-#ifdef CONFIG_SMP
-	# copy AP bootstrap routines below 1 MB
-	movl $BOOT_OFFSET, %esi
-	movl $AP_BOOT_OFFSET, %edi
-	movl $_hardcoded_unmapped_size, %ecx
-	rep movsb
+	# Not reached.
-#endif
-	call main_bsp								# never returns
 	cli
 	hlt
 .global map_kernel
 map_kernel:
+	#
 	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
 	# For simplicity, we map the entire 4G space.
+	#
 	movl %cr4, %ecx
 	orl $(1 << 4), %ecx							# turn PSE on
 	andl $(~(1 << 5)), %ecx						# turn PAE off
 	movl %ecx, %cr4
 	movl $(page_directory + 0), %esi
 	movl $(page_directory + 2048), %edi
 	xorl %ecx, %ecx
 	xorl %ebx, %ebx
 :
 	movl $((1 << 7) | (1 << 1) | (1 << 0)), %eax
 	orl %ebx, %eax
 	movl %eax, (%esi, %ecx, 4)					# mapping 0x00000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
 	movl %eax, (%edi, %ecx, 4)					# mapping 0x80000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
 	addl $(4 * 1024 * 1024), %ebx
 	incl %ecx
 	cmpl $512, %ecx
 	jl 0b
 	movl %esi, %cr3
 	movl %cr0, %ebx
 	orl $(1 << 31), %ebx						# turn paging on
 	movl %ebx, %cr0
 	ret
 # 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
 	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
 #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 $VESA_INIT_SEGMENT, %bx
 	mov %bx, %es
 	mov %bx, %fs
 	mov %bx, %gs
 	mov %bx, %ds
 	mov %bx, %ss
 	movl %esp, %eax
 	movl $0x0000fffc, %esp
 	movl $0x0000fffc, %ebp
 	pushl %eax
 #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
 #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
+		cmp $0x00, %ah
-		jmp vga_not_compat
+		je 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
 :
 	mov %cr0, %eax
 	or $1, %eax
 	mov %eax, %cr0
 	jmp 9f
 :
 	ljmpl $selector(KTEXT_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 $selector(KDATA_DES), %cx
 	movw %cx, %es
 	movw %cx, %fs
 	movw %cx, %gs
 	movw %cx, %ds					# kernel data + stack
 	movw %cx, %ss
 	movl $START_STACK, %esp			# initialize stack pointer
 	jmpl $selector(KTEXT_DES), $vesa_meeting_point
 .align 4
 e_vesa_init:
 #endif
 .section K_DATA_START, "aw", @progbits
 .align 4096
 page_directory:
 	.space 4096, 0
 grub_eax:
 	.long 0
 grub_ebx:
 	.long 0
 pse_msg:
 	.asciz "Page Size Extension not supported. System halted."

Subversion Repositories HelenOS

(root)/branches/dd/kernel/arch/ia32/src/boot/boot.S – Rev 3022 → 4055