| 0,0 → 1,434 |
|---|
| # |
| # 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" |
| |
| KTEXT=8 |
| KDATA=16 |
| |
| .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 KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
| |
| movw $KDATA, %cx |
| movw %cx, %es |
| movw %cx, %gs |
| movw %cx, %fs |
| movw %cx, %ds # kernel data + stack |
| movw %cx, %ss |
| |
| jmpl $KTEXT, $multiboot_meeting_point |
| multiboot_meeting_point: |
| |
| pushl %ebx # save parameters from GRUB |
| pushl %eax |
| |
| #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; |
| call *%edi; |
| 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 |
| |
| popl %eax |
| popl %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 |
| |
| 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 |
| |
| 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 |
| cld |
| rep movsb |
| |
| #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 |
| movl %ecx, %cr4 # turn PSE on |
| |
| movl $(page_directory+0), %esi |
| movl $(page_directory+2048), %edi |
| xorl %ecx, %ecx |
| xorl %ebx, %ebx |
| 0: |
| movl $((1<<7)|(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 |
| |
| # turn paging on |
| movl %cr0, %ebx |
| orl $(1<<31), %ebx |
| movl %ebx, %cr0 |
| ret |
| |
| #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 %esp,%ebp; |
| mov %ss,%cx; |
| mov $VESA_INIT_SEGMENT,%bx; |
| mov %bx,%ss; |
| mov $0x0000fffc,%esp; |
| push %ds; |
| push %es; |
| push %fs; |
| push %gs; |
| push %ebp; |
| push %cx; |
| |
| mov %bx,%ds; |
| mov %bx,%es; |
| mov %bx,%fs; |
| mov %bx,%gs; |
| |
| |
| mov $vesa_idt-vesa_init,%ebx; |
| lidtl (%ebx); |
| |
| #define VESA_INFO_SIZE 1024 |
| |
| #define VESA_MODE_LIST_PTR_OFFSET 14 |
| #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 CONFIG_VESA_BPP_a 255 |
| |
| #if CONFIG_VESA_BPP==24 |
| #undef CONFIG_VESA_BPP_a |
| #define CONFIG_VESA_BPP_a 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; |
| jz 2f; |
| mov $CONFIG_VESA_BPP_a,%al; |
| cmp VESA_MODE_BPP_OFFSET(%di),%al; |
| 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; |
| |
| 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: |
| |
| pop %cx; |
| pop %ebp; |
| pop %gs; |
| pop %fs; |
| pop %es; |
| pop %ds; |
| mov %cx,%ss; |
| mov %ebp,%esp; |
| |
| ljmpl $KTEXT,$(vesa_init_protect-vesa_init+VESA_INIT_SEGMENT<<4); |
| |
| |
| 0: #Error 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 */ |
| |
| vesa_init_protect: |
| .code32 |
| ret; |
| |
| vesa_idt: |
| .word 0x03ff |
| .long 0 |
| .align 4 |
| e_vesa_init: |
| #endif |
| |
| .section K_DATA_START, "aw", @progbits |
| |
| .align 4096 |
| page_directory: |
| .space 4096, 0 |