| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com> |
| * Copyright (C) 2007-2008 coresystems GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <cpu/x86/stack.h> |
| #include <cpu/x86/mtrr.h> |
| #include <cpu/x86/cache.h> |
| #include <cpu/x86/post_code.h> |
| #include <cbmem.h> |
| |
| #define CACHE_AS_RAM_SIZE 0x10000 |
| #define CACHE_AS_RAM_BASE 0xd0000 |
| |
| #define CPU_PHYSMASK_HI (1 << (CONFIG_CPU_ADDR_BITS - 32) - 1) |
| |
| /* Save the BIST result. */ |
| movl %eax, %ebp |
| |
| cache_as_ram: |
| post_code(0x20) |
| /* Clear the cache memory region. This will also fill up the cache */ |
| movl $CACHE_AS_RAM_BASE, %esi |
| movl %esi, %edi |
| movl $(CACHE_AS_RAM_SIZE / 4), %ecx |
| // movl $0x23322332, %eax |
| xorl %eax, %eax |
| rep stosl |
| |
| post_code(0x21) |
| /* Set up the stack pointer. */ |
| movl $(CACHE_AS_RAM_SIZE + CACHE_AS_RAM_BASE - 4), %eax |
| movl %eax, %esp |
| |
| /* Restore the BIST result. */ |
| movl %ebp, %eax |
| movl %esp, %ebp |
| pushl %eax |
| |
| before_romstage: |
| post_code(0x29) |
| /* Call romstage.c main function. */ |
| call main |
| |
| post_code(0x30) |
| |
| #if CONFIG_HAVE_ACPI_RESUME |
| movl CBMEM_BOOT_MODE, %eax |
| cmpl $0x2, %eax // Resume? |
| jne __acpi_resume_backup_done |
| |
| /* copy 1MB - 64K to high tables ram_base to prevent memory corruption |
| * through stage 2. We could keep stuff like stack and heap in high |
| * tables memory completely, but that's a wonderful clean up task for |
| * another day. |
| */ |
| cld |
| movl $CONFIG_RAMBASE, %esi |
| movl CBMEM_RESUME_BACKUP, %edi |
| movl $HIGH_MEMORY_SAVE / 4, %ecx |
| rep movsl |
| |
| __acpi_resume_backup_done: |
| #endif |
| |
| post_code(0x3d) |
| |
| __main: |
| post_code(POST_PREPARE_RAMSTAGE) |
| cld /* Clear direction flag. */ |
| |
| movl $ROMSTAGE_STACK, %esp |
| movl %esp, %ebp |
| call copy_and_run |
| |
| .Lhlt: |
| post_code(POST_DEAD_CODE) |
| hlt |
| jmp .Lhlt |
| |
