2 * This file is part of the coreboot project.
4 * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com>
5 * Copyright (C) 2007-2008 coresystems GmbH
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <cpu/x86/car.h>
22 #include <cpu/x86/stack.h>
23 #include <cpu/x86/mtrr.h>
25 #define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE
26 #define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE
33 /* Send INIT IPI to all excluding ourself. */
34 movl $0x000C4500, %eax
35 movl $0xFEE00300, %esi
38 /* Zero out all fixed range and variable range MTRRs. */
39 movl $mtrr_table, %esi
40 movl $((mtrr_table_end - mtrr_table) / 2), %edi
51 /* Configure the default memory type to uncacheable. */
52 movl $MTRRdefType_MSR, %ecx
54 andl $(~0x00000cff), %eax
57 /* Set Cache-as-RAM base address. */
58 movl $(MTRRphysBase_MSR(0)), %ecx
59 movl $(CACHE_AS_RAM_BASE | MTRR_TYPE_WRBACK), %eax
63 /* Set Cache-as-RAM mask. */
64 movl $(MTRRphysMask_MSR(0)), %ecx
65 movl $(~((CACHE_AS_RAM_SIZE - 1)) | (1 << 11)), %eax
73 /* Enable cache (CR0.CD = 0, CR0.NW = 0). */
74 /* TODO: enable_cache()? But that doesn't have "invd". */
76 andl $(~((1 << 30) | (1 << 29))), %eax
80 /* Clear the cache memory reagion. */
81 movl $CACHE_AS_RAM_BASE, %esi
83 movl $(CACHE_AS_RAM_SIZE / 4), %ecx
84 // movl $0x23322332, %eax
88 /* Enable Cache-as-RAM mode by disabling cache. */
91 #if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
92 /* Enable cache for our code in Flash because we do XIP here */
93 movl $MTRRphysBase_MSR(1), %ecx
95 #if defined(CONFIG_TINY_BOOTBLOCK) && CONFIG_TINY_BOOTBLOCK
96 #define REAL_XIP_ROM_BASE AUTO_XIP_ROM_BASE
98 #define REAL_XIP_ROM_BASE CONFIG_XIP_ROM_BASE
100 movl $REAL_XIP_ROM_BASE, %eax
101 orl $MTRR_TYPE_WRBACK, %eax
104 movl $MTRRphysMask_MSR(1), %ecx
106 movl $(~(CONFIG_XIP_ROM_SIZE - 1) | 0x800), %eax
108 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
112 /* Set up the stack pointer. */
113 #if defined(CONFIG_USBDEBUG) && (CONFIG_USBDEBUG == 1)
114 /* Leave some space for the struct ehci_debug_info. */
115 movl $(CACHE_AS_RAM_BASE + CACHE_AS_RAM_SIZE - 4 - 128), %eax
117 movl $(CACHE_AS_RAM_BASE + CACHE_AS_RAM_SIZE - 4), %eax
121 restore_bist_result()
128 /* Call romstage.c main function. */
147 movl $MTRRphysBase_MSR(0), %ecx
149 movl $MTRRphysMask_MSR(0), %ecx
151 movl $MTRRphysBase_MSR(1), %ecx
153 movl $MTRRphysMask_MSR(1), %ecx
167 /* Enable Write Back and Speculative Reads for the first 1MB. */
168 movl $MTRRphysBase_MSR(0), %ecx
169 movl $(0x00000000 | MTRR_TYPE_WRBACK), %eax
172 movl $MTRRphysMask_MSR(0), %ecx
173 movl $(~(1024 * 1024 - 1) | (1 << 11)), %eax
179 /* And enable cache again after setting MTRRs. */
188 /* Invalidate the cache again. */
193 /* Clear boot_complete flag. */
197 cld /* Clear direction flag. */
201 movl $ROMSTAGE_STACK, %esp
213 .word 0x250, 0x258, 0x259
214 .word 0x268, 0x269, 0x26A
215 .word 0x26B, 0x26C, 0x26D
218 .word 0x200, 0x201, 0x202, 0x203
219 .word 0x204, 0x205, 0x206, 0x207
220 .word 0x208, 0x209, 0x20A, 0x20B
221 .word 0x20C, 0x20D, 0x20E, 0x20F