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authorStefan Reinauer <stepan@coresystems.de>2009-04-17 08:37:18 +0000
committerStefan Reinauer <stepan@openbios.org>2009-04-17 08:37:18 +0000
commitaeba92ab5b0afd1464d6b1a275b5f5b00b351b32 (patch)
tree225fbff67fc05e70507ac6ef7b3af32f00bac6f8 /src/cpu/via/car
parent56c51bd120a935e64cfd96d8ad71c9d1f7aab323 (diff)
downloadcoreboot-aeba92ab5b0afd1464d6b1a275b5f5b00b351b32.tar.xz
Add VIA CX700 support, plus VIA vt8454c reference board support.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Ronald G. Minnich <rminnich@gmail.com> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4126 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu/via/car')
-rw-r--r--src/cpu/via/car/cache_as_ram_post.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/src/cpu/via/car/cache_as_ram_post.c b/src/cpu/via/car/cache_as_ram_post.c
new file mode 100644
index 0000000000..99e0dd89ec
--- /dev/null
+++ b/src/cpu/via/car/cache_as_ram_post.c
@@ -0,0 +1,106 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008 VIA Technologies, Inc.
+ * (Written by Jason Zhao <jasonzhao@viatech.com.cn> 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
+ */
+
+ __asm__ volatile (
+ /*
+ FIXME : backup stack in CACHE_AS_RAM into mmx and sse and after we get STACK up, we restore that.
+ It is only needed if we want to go back
+ */
+
+ /* We don't need cache as ram for now on */
+ /* disable cache */
+ "movl %cr0, %eax\n\t"
+ "orl $(0x1<<30),%eax\n\t"
+ "movl %eax, %cr0\n\t"
+
+
+ /* Set the default memory type and disable fixed and enable variable MTRRs */
+ "movl $0x2ff, %ecx\n\t"
+ //"movl $MTRRdefType_MSR, %ecx\n\t"
+ "xorl %edx, %edx\n\t"
+ /* Enable Variable and Disable Fixed MTRRs */
+ "movl $0x00000800, %eax\n\t"
+ "wrmsr\n\t"
+
+ /* enable caching for first 1M using variable mtrr */
+ "movl $0x200, %ecx\n\t"
+ "xorl %edx, %edx\n\t"
+ "movl $(0 | 6), %eax\n\t"
+ //"movl $(0 | MTRR_TYPE_WRBACK), %eax\n\t"
+ "wrmsr\n\t"
+
+/*Jasonzhao@viatech.com.cn, I enable cache for 0-7ffff, 80000-9ffff, e0000-fffff;
+if 1M cacheable,then when S3 resume, there is stange color on screen for 2 sec.
+suppose problem of a0000-dfffff and cache .
+and in x86_setup_fixed_mtrrs()(mtrr.c), 0-256M is set cacheable.*/
+
+ "movl $0x201, %ecx\n\t"
+ "movl $0x0000000f, %edx\n\t" /* AMD 40 bit 0xff*/
+ "movl $((~(( 0 + 0x80000) - 1)) | 0x800), %eax\n\t"
+ "wrmsr\n\t"
+
+ "movl $0x202, %ecx\n\t"
+ "xorl %edx, %edx\n\t"
+ "movl $(0x80000 | 6), %eax\n\t"
+ "orl $(0 | 6), %eax\n\t"
+ "wrmsr\n\t"
+
+ "movl $0x203, %ecx\n\t"
+ "movl $0x0000000f, %edx\n\t" /* AMD 40 bit 0xff*/
+ "movl $((~(( 0 + 0x20000) - 1)) | 0x800), %eax\n\t"
+ "wrmsr\n\t"
+
+ "movl $0x204, %ecx\n\t"
+ "xorl %edx, %edx\n\t"
+ "movl $(0xc0000 | 6), %eax\n\t"
+ "orl $(0 | 6), %eax\n\t"
+ "wrmsr\n\t"
+
+ "movl $0x205, %ecx\n\t"
+ "movl $0x0000000f, %edx\n\t" /* AMD 40 bit 0xff*/
+ "movl $((~(( 0 + 0x40000) - 1)) | 0x800), %eax\n\t"
+ "wrmsr\n\t"
+
+ /*jasonzhao@viatech.com.cn add this 2008-11-27, cache XIP_ROM_BASE-SIZE to speedup the coreboot code*/
+ "movl $0x206, %ecx\n\t"
+ "xorl %edx, %edx\n\t"
+ "movl $XIP_ROM_BASE,%eax\n\t"
+ "orl $(0 | 6), %eax\n\t"
+ "wrmsr\n\t"
+
+ "movl $0x207, %ecx\n\t"
+ "xorl %edx, %edx\n\t"
+ "movl $XIP_ROM_SIZE,%eax\n\t"
+ "decl %eax\n\t"
+ "notl %eax\n\t"
+ "orl $(0 | 0x800), %eax\n\t"
+ "wrmsr\n\t"
+
+ /* enable cache */
+ "movl %cr0, %eax\n\t"
+ "andl $0x9fffffff,%eax\n\t"
+ "movl %eax, %cr0\n\t"
+ "invd\n\t"
+
+ /*
+ FIXME: I hope we don't need to change esp and ebp value here, so we can restore value from mmx sse back
+ But the problem is the range is some io related, So don't go back
+ */
+ );