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authorArthur Heymans <arthur@aheymans.xyz>2018-04-10 16:18:09 +0200
committerPatrick Georgi <pgeorgi@google.com>2019-01-24 13:44:14 +0000
commita402a9e7ab4ce46bc8829646e59cffa079309590 (patch)
tree28c18f21b871149d055c0dbb4627fec6eb7cb610 /src
parent20f71369d95d9691e668455b2262c80997fc8c3f (diff)
downloadcoreboot-a402a9e7ab4ce46bc8829646e59cffa079309590.tar.xz
nb/intel/x4x: Put stage cache in TSEG
TSEG is not accessible in ring 0 after it is locked in ramstage, in contrast with cbmem which remains accessible. Assuming SMM does not touch the cache this is a good region to cache stages. Tested on Intel DG41WV, the stage cache gets properly created and used on S3 resume. Change-Id: Ie46c1416f8042d5571339b36e1253c0cae0684b8 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/25606 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
-rw-r--r--src/northbridge/intel/x4x/Kconfig5
-rw-r--r--src/northbridge/intel/x4x/Makefile.inc3
-rw-r--r--src/northbridge/intel/x4x/stage_cache.c32
3 files changed, 40 insertions, 0 deletions
diff --git a/src/northbridge/intel/x4x/Kconfig b/src/northbridge/intel/x4x/Kconfig
index 6f3546f7f4..7cae91e324 100644
--- a/src/northbridge/intel/x4x/Kconfig
+++ b/src/northbridge/intel/x4x/Kconfig
@@ -30,6 +30,7 @@ config NORTHBRIDGE_SPECIFIC_OPTIONS # dummy
select POSTCAR_CONSOLE
select SMM_TSEG
select PARALLEL_MP
+ select CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM
config CBFS_SIZE
hex
@@ -47,4 +48,8 @@ config MMCONF_BASE_ADDRESS
hex
default 0xe0000000
+config SMM_RESERVED_SIZE
+ hex
+ default 0x100000
+
endif
diff --git a/src/northbridge/intel/x4x/Makefile.inc b/src/northbridge/intel/x4x/Makefile.inc
index 3118b0980e..cc0a97d052 100644
--- a/src/northbridge/intel/x4x/Makefile.inc
+++ b/src/northbridge/intel/x4x/Makefile.inc
@@ -30,5 +30,8 @@ ramstage-y += gma.c
ramstage-y += northbridge.c
postcar-y += ram_calc.c
+romstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
+ramstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
+postcar-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
endif
diff --git a/src/northbridge/intel/x4x/stage_cache.c b/src/northbridge/intel/x4x/stage_cache.c
new file mode 100644
index 0000000000..ff752e5d11
--- /dev/null
+++ b/src/northbridge/intel/x4x/stage_cache.c
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 Google, Inc.
+ *
+ * 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.
+ */
+
+#include <arch/io.h>
+#include <cbmem.h>
+#include <device/pci.h>
+#include <stage_cache.h>
+#include <cpu/intel/smm/gen1/smi.h>
+#include "x4x.h"
+
+void stage_cache_external_region(void **base, size_t *size)
+{
+ /*
+ * The ramstage cache lives in the TSEG region at RESERVED_SMM_OFFSET.
+ * The top of RAM is defined to be the TSEG base address.
+ */
+ *size = CONFIG_SMM_RESERVED_SIZE;
+ *base = (void *)(northbridge_get_tseg_base()
+ + CONFIG_SMM_RESERVED_SIZE);
+}