diff options
Diffstat (limited to 'src/cpu/amd/agesa/family14/cache_as_ram.inc')
-rw-r--r-- | src/cpu/amd/agesa/family14/cache_as_ram.inc | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/cpu/amd/agesa/family14/cache_as_ram.inc b/src/cpu/amd/agesa/family14/cache_as_ram.inc new file mode 100644 index 0000000000..98da3cbffb --- /dev/null +++ b/src/cpu/amd/agesa/family14/cache_as_ram.inc @@ -0,0 +1,98 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Advanced Micro Devices, Inc. + * + * 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 + */ + +/****************************************************************************** + * AMD Generic Encapsulated Software Architecture + * + * $Workfile:: cache_as_ram.inc + * + * Description: cache_as_ram.inc - AGESA Module Entry Point for GCC complier + * + ****************************************************************************** + */ + +#include "gcccar.inc" + +/* + * XMM map: + * xmm0: BIST + * xmm1: backup ebx -- cpu_init_detected + */ + +.code32 +.globl cache_as_ram_setup, disable_cache_as_ram, cache_as_ram_setup_out + +cache_as_ram_setup: + + post_code(0xa0) + + /* enable SSE2 128bit instructions */ + /* Turn on OSFXSR [BIT9] and OSXMMEXCPT [BIT10] onto CR4 register */ + + movl %cr4, %eax + orl $(3<<9), %eax + movl %eax, %cr4 + + /* Get the cpu_init_detected */ + mov $1, %eax + cpuid + shr $24, %ebx + + /* Save the BIST result */ + cvtsi2sd %ebp, %xmm0 + + /* for normal part %ebx already contain cpu_init_detected from fallback call */ + + /* Save the cpu_init_detected */ + cvtsi2sd %ebx, %xmm1 + + post_code(0xa1) + AMD_ENABLE_STACK + + post_code(0xa1) + + /* Restore the BIST result */ + cvtsd2si %xmm0, %edx + + /* Restore the cpu_init_detected */ + cvtsd2si %xmm1, %ebx + + pushl %ebx /* init detected */ + pushl %edx /* bist */ + call cache_as_ram_main + + /* Should never see this postcode */ + post_code(0xaf) +stop: + jmp stop + +disable_cache_as_ram: + /* Save return stack */ + cvtsi2sd %esp, %xmm0 + + AMD_DISABLE_STACK + + /* Restore the return stack */ + cvtsd2si %xmm0, %esp + + ret + +cache_as_ram_setup_out: + + |