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authorDuncan Laurie <dlaurie@chromium.org>2012-10-03 19:07:05 -0700
committerRonald G. Minnich <rminnich@gmail.com>2012-11-14 05:41:12 +0100
commit11290c49b0e7f8c13e0128b0e2005b5466b49f5d (patch)
treea8af7d2b6ddd3afc64038d153e83f767ec4626f0 /src/southbridge/via
parent313ec9d15bb8c56fc76eb40be920552cb231465e (diff)
downloadcoreboot-11290c49b0e7f8c13e0128b0e2005b5466b49f5d.tar.xz
SMM: Restore GNVS pointer in the resume path
The SMM GNVS pointer is normally updated only when the ACPI tables are created, which does not happen in the resume path. In order to restore this pointer it needs to be available at resume time. The method used to locate it at creation time cannot be used again as that magic signature is overwritten with the address itself. So a new CBMEM ID is added to store the 32bit address so it can be found again easily. A new function is defined to save this pointer in CBMEM which needs to be called when the ACPI tables are created in each mainboard when write_acpi_tables() is called. The cpu_index variable had to be renamed due to a conflict when cpu/cpu.h is added for the smm_setup_structures() prototype. Change-Id: Ic764ff54525e12b617c1dd8d6a3e5c4f547c3e6b Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: http://review.coreboot.org/1765 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/southbridge/via')
-rw-r--r--src/southbridge/via/vt8237r/Makefile.inc1
-rw-r--r--src/southbridge/via/vt8237r/smi.c33
2 files changed, 34 insertions, 0 deletions
diff --git a/src/southbridge/via/vt8237r/Makefile.inc b/src/southbridge/via/vt8237r/Makefile.inc
index 08545feca2..6474e585e7 100644
--- a/src/southbridge/via/vt8237r/Makefile.inc
+++ b/src/southbridge/via/vt8237r/Makefile.inc
@@ -25,4 +25,5 @@ driver-y += sata.c
driver-y += usb.c
driver-$(CONFIG_PIRQ_ROUTE) += pirq.c
ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += fadt.c
+ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c
smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
diff --git a/src/southbridge/via/vt8237r/smi.c b/src/southbridge/via/vt8237r/smi.c
new file mode 100644
index 0000000000..b865a5b0b0
--- /dev/null
+++ b/src/southbridge/via/vt8237r/smi.c
@@ -0,0 +1,33 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 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
+ */
+
+#include <stdint.h>
+#include <arch/io.h>
+#include <cpu/cpu.h>
+
+void smm_setup_structures(void *gnvs, void *tcg, void *smi1)
+{
+ /* The GDT or coreboot table is going to live here. But a long time
+ * after we relocated the GNVS, so this is not troublesome.
+ */
+ *(u32 *)0x500 = (u32)gnvs;
+ *(u32 *)0x504 = (u32)tcg;
+ *(u32 *)0x508 = (u32)smi1;
+ outb(0xea, 0xb2);
+}