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

+#
 # Copyright (c) 2005 Ondrej Palkovsky
 # Copyright (c) 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/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
 	lgdt 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 $0x80000000, %eax
+ 	cpuid
+ 	cmp $0x80000000, %eax						# any function > 80000000h?
+	jbe long_mode_unsupported
+	movl $(AMD_CPUID_EXTENDED), %eax			# Extended function code 80000001
+	cpuid
+	bt $29, %edx								# Test if long mode is supported.
+ 	jc long_mode_supported
+	long_mode_unsupported:
+		movl $long_mode_msg, %esi
+		jmp error_halt
+	long_mode_supported:
 #ifdef CONFIG_FB
-	mov $vesa_init, %esi;
+	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
-	# Protected 32-bit. We want to reuse the code-seg descriptor,
-	# the Default operand size must not be 1 when entering long mode
-	movl $0x80000000, %eax
- 	cpuid
- 	cmp $0x80000000, %eax						# any function > 80000000h?
-	jbe long_mode_unsupported
-	movl $(AMD_CPUID_EXTENDED), %eax			# Extended function code 80000001
-	cpuid
-	bt $29, %edx								# Test if long mode is supported.
- 	jc long_mode_supported
-	long_mode_unsupported:
-		cli
-		hlt
-	long_mode_supported:
 	# Enable 64-bit page transaltion 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_SCANLINE_OFFSET 16
 #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
-#undef CONFIG_VESA_BPP_a
-#define CONFIG_VESA_BPP_a 32
+#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_a, %al
+	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
+			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 $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
+	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_DATA_START, "aw", @progbits
 .align 4096
 # Identical mapping of first 64MB and the same of -2GB -> 0
 .global ptl_2
 ptl_2:
 	.quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x1000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x1200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x1400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x1600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x1800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x1a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x1c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x1e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x2000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x2200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x2400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x2600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x2800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x2a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x2c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x2e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x3000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x3200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x3400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x3600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x3800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x3a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x3c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 	.quad 0x3e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 .align 4096
 .global ptl_1
 ptl_1:
 	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
 	.fill 509,8,0
 	.quad ptl_2 + (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)
 .global bootstrap_gdtr
 bootstrap_gdtr:
 	.word gdtselector(GDT_ITEMS)
 	.long KA2PA(gdt)
 grub_eax:
 	.long 0
 grub_ebx:
 	.long 0
+long_mode_msg:
+	.asciz "64 bit long mode not supported. System halted."

Subversion Repositories HelenOS

(root)/branches/rcu/kernel/arch/amd64/src/boot/boot.S – Rev 2131 → 2307