diff options
Diffstat (limited to 'src/cpu/intel/model_106cx/cache_as_ram.inc')
| -rw-r--r-- | src/cpu/intel/model_106cx/cache_as_ram.inc | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/cpu/intel/model_106cx/cache_as_ram.inc b/src/cpu/intel/model_106cx/cache_as_ram.inc new file mode 100644 index 0000000000..92cf92f0f0 --- /dev/null +++ b/src/cpu/intel/model_106cx/cache_as_ram.inc @@ -0,0 +1,165 @@ +/* + * 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 + */ + +#define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE +#define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE +#define post_code(x) intel_chip_post_macro(x) + +#include <cpu/x86/mtrr.h> +#include <cpu/amd/mtrr.h> + + /* Save the BIST result */ + movl %eax, %ebp + +cache_as_ram: +#if CONFIG_USE_FALLBACK_IMAGE == 1 + + post_code(0x20) + + /* Send INIT IPI to all excluding ourself */ + movl $0x000C4500, %eax + movl $0xFEE00300, %esi + movl %eax, (%esi) + + post_code(0x21) + + /* Zero out all Fixed Range and Variable Range MTRRs */ + movl $mtrr_table, %esi + movl $( (mtrr_table_end - mtrr_table) / 2), %edi + xorl %eax, %eax + xorl %edx, %edx +clear_mtrrs: + movw (%esi), %bx + movzx %bx, %ecx + wrmsr + add $2, %esi + dec %edi + jnz clear_mtrrs + post_code(0x22) + + /* Configure the default memory type to uncacheable */ + movl $MTRRdefType_MSR, %ecx + rdmsr + andl $(~0x00000cff), %eax + wrmsr + + post_code(0x23) + /* Set cache as ram base address */ + movl $(MTRRphysBase_MSR(0)), %ecx + movl $(CACHE_AS_RAM_BASE | MTRR_TYPE_WRBACK), %eax + xorl %edx, %edx + wrmsr + + post_code(0x24) + /* Set cache as ram mask */ + movl $(MTRRphysMask_MSR(0)), %ecx + movl $(~((CACHE_AS_RAM_SIZE-1)) | (1 << 11)), %eax + movl $0x00000000, %edx + wrmsr + + post_code(0x25) + /* Enable MTRR */ + movl $MTRRdefType_MSR, %ecx + rdmsr + orl $(1 << 11), %eax + wrmsr + + post_code(0x26) + /* Enable L2 Cache */ + movl $0x11e, %ecx + rdmsr + orl $(1 << 8), %eax + wrmsr + + post_code(0x27) + /* CR0.CD = 0, CR0.NW = 0 */ + movl %cr0, %eax + andl $( ~( (1 << 30) | (1 << 29) ) ), %eax + invd + movl %eax, %cr0 + + post_code(0x28) + /* Clear the cache memory reagion */ + movl $CACHE_AS_RAM_BASE, %esi + movl %esi, %edi + movl $(CACHE_AS_RAM_SIZE / 4), %ecx + //movl $0x23322332, %eax + xorl %eax, %eax + rep stosl +#endif + + post_code(0x29) + /* Enable Cache As RAM mode by disabling cache */ + movl %cr0, %eax + orl $(1 << 30), %eax + movl %eax, %cr0 + +#if 0 +#if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE) + /* Enable cache for our code in Flash because we do CONFIG_XIP here */ + movl $MTRRphysBase_MSR(1), %ecx + xorl %edx, %edx + movl $(CONFIG_XIP_ROM_BASE | MTRR_TYPE_WRBACK), %eax + wrmsr + + movl $MTRRphysMask_MSR(1), %ecx + movl $0x0000000f, %edx + movl $(~(CONFIG_XIP_ROM_SIZE - 1) | 0x800), %eax + wrmsr +#endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */ +#endif + + post_code(0x2a) + /* enable cache */ + movl %cr0, %eax + andl $( ~( (1 << 30) | (1 << 29) ) ), %eax + movl %eax, %cr0 + + /* Set up stack pointer */ + movl $(CACHE_AS_RAM_BASE + CACHE_AS_RAM_SIZE - 4), %eax + movl %eax, %esp + + /* Restore the BIST result */ + movl %ebp, %eax + movl %esp, %ebp + pushl %eax + + post_code(0x23) + + call stage1_main + + post_code(0x2f) +error: + hlt + jmp error + +mtrr_table: + /* Fixed MTRRs */ + .word 0x250, 0x258, 0x259 + .word 0x268, 0x269, 0x26A + .word 0x26B, 0x26C, 0x26D + .word 0x26E, 0x26F + /* Variable MTRRs */ + .word 0x200, 0x201, 0x202, 0x203 + .word 0x204, 0x205, 0x206, 0x207 + .word 0x208, 0x209, 0x20A, 0x20B + .word 0x20C, 0x20D, 0x20E, 0x20F +mtrr_table_end: + |