| 66,6 → 66,21 |
|---|
| pushl %ebx # save parameters from GRUB |
| pushl %eax |
| |
| xorl %eax, %eax |
| cpuid |
| cmp $0x0, %eax # any function > 0? |
| jbe pse_unsupported |
| movl $0x1, %eax # Basic function code 80000001 |
| 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 |
| 209,7 → 224,7 |
|---|
| rep movsb |
| |
| #endif |
| |
| |
| call main_bsp # never returns |
| |
| cli |
| 222,19 → 237,20 |
|---|
| # For simplicity, we map the entire 4G space. |
| # |
| movl %cr4, %ecx |
| orl $(1<<4), %ecx |
| movl %ecx, %cr4 # turn PSE on |
| 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 |
| movl $(page_directory + 0), %esi |
| movl $(page_directory + 2048), %edi |
| xorl %ecx, %ecx |
| xorl %ebx, %ebx |
| 0: |
| movl $((1<<7)|(1<<0)), %eax |
| 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 |
| 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 |
| 242,12 → 258,71 |
|---|
| |
| movl %esi, %cr3 |
| |
| # turn paging on |
| movl %cr0, %ebx |
| orl $(1<<31), %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 |
| 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 |
| |
| #ifdef CONFIG_FB |
| vesa_init: |
| jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init |
| 426,3 → 501,6 |
|---|
| .align 4096 |
| page_directory: |
| .space 4096, 0 |
| |
| pse_msg: |
| .ascii "Page Size Extension not supported. System halted.\0" |