| 1,5 → 1,6 |
|---|
| # |
| # Copyright (C) 2005 Ondrej Palkovsky |
| # Copyright (C) 2006 Martin Decky |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| 37,25 → 38,7 |
|---|
| #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) |
| |
| .section K_TEXT_START, "ax" |
| # .code16 |
| # .global kernel_image_start |
| # .global multiboot_image_start |
| # kernel_image_start: |
| |
| # movl $0x80000000, %eax |
| # cpuid |
| # cmp $0x80000000, %eax # any function > 80000000h? |
| # jbe no_long_mode |
| # movl $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001 |
| # cpuid |
| # bt $29, %edx # Test if long mode is supported. |
| # jnc no_long_mode |
| # |
| # |
| # no_long_mode: |
| # 1: |
| # jmp 1b |
| # |
| .code32 |
| .align 4 |
| .global multiboot_image_start |
| 89,6 → 72,21 |
|---|
| # 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 |
| |
| 218,6 → 216,18 |
|---|
| |
| 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 |