/* * This file is part of the coreboot project. * * Copyright (C) 2000,2007 Ronald G. Minnich * Copyright (C) 2005 Eswar Nallusamy, LANL * Copyright (C) 2005 Tyan * (Written by Yinghai Lu for Tyan) * Copyright (C) 2007 coresystems GmbH * (Written by Stefan Reinauer for coresystems GmbH) * Copyright (C) 2007,2008 Carl-Daniel Hailfinger * Copyright (C) 2008 VIA Technologies, Inc. * (Written by Jason Zhao for VIA) * * 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 CacheSize DCACHE_RAM_SIZE #define CacheBase DCACHE_RAM_BASE #include /* Save the BIST result */ movl %eax, %ebp CacheAsRam: /* disable cache */ movl %cr0, %eax orl $(0x1<<30),%eax movl %eax,%cr0 invd /* Set the default memory type and enable fixed and variable MTRRs */ movl $MTRRdefType_MSR, %ecx xorl %edx, %edx /* Enable Variable and Fixed MTRRs */ movl $0x00000c00, %eax wrmsr /* Clear all MTRRs */ xorl %edx, %edx movl $fixed_mtrr_msr, %esi clear_fixed_var_mtrr: lodsl (%esi), %eax testl %eax, %eax jz clear_fixed_var_mtrr_out movl %eax, %ecx xorl %eax, %eax wrmsr jmp clear_fixed_var_mtrr clear_fixed_var_mtrr_out: /* MTRRPhysBase */ movl $0x200, %ecx xorl %edx, %edx movl $(CacheBase|MTRR_TYPE_WRBACK),%eax wrmsr /* MTRRPhysMask */ movl $0x201, %ecx /* This assumes we never access addresses above 2^36 in CAR. */ movl $0x0000000f,%edx movl $(~(CacheSize-1)|0x800),%eax wrmsr /* enable write base caching so we can do execute in place * on the flash rom. */ /* MTRRPhysBase */ movl $0x202, %ecx xorl %edx, %edx movl $(XIP_ROM_BASE|MTRR_TYPE_WRBACK),%eax wrmsr /* MTRRPhysMask */ movl $0x203, %ecx movl $0x0000000f,%edx movl $(~(XIP_ROM_SIZE - 1) | 0x800), %eax wrmsr movl $MTRRdefType_MSR, %ecx xorl %edx, %edx /* Enable Variable and Fixed MTRRs */ movl $0x00000800, %eax wrmsr movl %cr0, %eax andl $0x9fffffff,%eax movl %eax, %cr0 /* Read the range with lodsl*/ cld movl $CacheBase, %esi movl %esi, %edi movl $(CacheSize>>2), %ecx rep lodsl movl $CacheBase, %esi movl %esi, %edi movl $(CacheSize>>2), %ecx /* 0x5c5c5c5c is a memory test pattern. * TODO: Check if everything works with the zero pattern as well. */ /*xorl %eax, %eax*/ xorl $0x5c5c5c5c,%eax rep stosl movl XIP_ROM_BASE, %esi movl %esi, %edi movl $(XIP_ROM_SIZE>>2), %ecx rep lodsl /* The key point of this CAR code is C7 cache does not turn into * "no fill" mode, which is not compatible with general CAR code. */ movl $(CacheBase+CacheSize-4), %eax movl %eax, %esp #ifdef CONFIG_CARTEST testok: movb $0x40,%al outb %al, $0x80 xorl %edx, %edx xorl %eax, %eax movl $0x5c5c,%edx pushl %edx pushl %edx pushl %edx pushl %edx pushl %edx popl %esi popl %esi popl %eax popl %eax popl %eax cmpl %edx,%eax jne stackerr #endif /* Restore the BIST result */ movl %ebp, %eax /* We need to set ebp ? No need */ movl %esp, %ebp pushl %eax /* bist */ call amd64_main /* We will not go back */ fixed_mtrr_msr: .long 0x250, 0x258, 0x259 .long 0x268, 0x269, 0x26A .long 0x26B, 0x26C, 0x26D .long 0x26E, 0x26F var_mtrr_msr: .long 0x200, 0x201, 0x202, 0x203 .long 0x204, 0x205, 0x206, 0x207 .long 0x208, 0x209, 0x20A, 0x20B .long 0x20C, 0x20D, 0x20E, 0x20F .long 0x000 /* NULL, end of table */