diff options
Diffstat (limited to 'src/cpu/intel/car/p4-netburst/exit_car.S')
| -rw-r--r-- | src/cpu/intel/car/p4-netburst/exit_car.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/cpu/intel/car/p4-netburst/exit_car.S b/src/cpu/intel/car/p4-netburst/exit_car.S new file mode 100644 index 0000000000..3b991288ff --- /dev/null +++ b/src/cpu/intel/car/p4-netburst/exit_car.S @@ -0,0 +1,45 @@ +/* + * 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. + */ + +#include <cpu/x86/mtrr.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/post_code.h> + +.code32 +.global chipset_teardown_car + +chipset_teardown_car: + pop %esp + + post_code(0x30) + + /* Disable cache. */ + movl %cr0, %eax + orl $CR0_CacheDisable, %eax + movl %eax, %cr0 + + post_code(0x31) + + /* Disable MTRR. */ + movl $MTRR_DEF_TYPE_MSR, %ecx + rdmsr + andl $(~MTRR_DEF_TYPE_EN), %eax + wrmsr + + post_code(0x32) + + /* Return to caller. */ + jmp *%esp |