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authorRizwan Qureshi <rizwan.qureshi@intel.com>2016-08-24 16:05:32 +0530
committerMartin Roth <martinroth@google.com>2016-08-31 17:39:05 +0200
commit4dfe13081922454e97e6b0f8d6532cd97c635b60 (patch)
tree6de04389a077cddbff70e76d2605e68246985ad4 /src
parent3156934bf8f059fb8ba14965b75ed0ccb56c79cb (diff)
downloadcoreboot-4dfe13081922454e97e6b0f8d6532cd97c635b60.tar.xz
driver/intel/fsp2.0: Add External stage cache region helper
If ramstage caching outside CBMEM is enabled i.e CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM, then a helper function to determine the caching region in SMM should be implemented. Add the same to FSP2.0 driver. FSP1.1 driver had the same implementation hence copied stage_cache.c. The SoC code should implement the smm_subregion to provide the base and size of the caching region within SMM. The fsp/memmap.h provides the prototype and we will reuse the same from FPS 1.1. Change-Id: I4412a710391dc0cee044b96403c50260c3534e6f Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com> Reviewed-on: https://review.coreboot.org/16312 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src')
-rw-r--r--src/drivers/intel/fsp2_0/Makefile.inc2
-rw-r--r--src/drivers/intel/fsp2_0/include/fsp/memmap.h47
-rw-r--r--src/drivers/intel/fsp2_0/stage_cache.c28
3 files changed, 77 insertions, 0 deletions
diff --git a/src/drivers/intel/fsp2_0/Makefile.inc b/src/drivers/intel/fsp2_0/Makefile.inc
index 0a6ae433a0..79b57f60a6 100644
--- a/src/drivers/intel/fsp2_0/Makefile.inc
+++ b/src/drivers/intel/fsp2_0/Makefile.inc
@@ -23,6 +23,7 @@ romstage-$(CONFIG_DISPLAY_UPD_DATA) += upd_display.c
romstage-$(CONFIG_VERIFY_HOBS) += hob_verify.c
romstage-y += util.c
romstage-y += memory_init.c
+romstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
ramstage-y += debug.c
ramstage-y += graphics.c
@@ -32,6 +33,7 @@ ramstage-$(CONFIG_DISPLAY_HOBS) += hob_display.c
ramstage-$(CONFIG_VERIFY_HOBS) += hob_verify.c
ramstage-y += notify.c
ramstage-y += silicon_init.c
+ramstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
ramstage-$(CONFIG_DISPLAY_UPD_DATA) += upd_display.c
ramstage-y += util.c
diff --git a/src/drivers/intel/fsp2_0/include/fsp/memmap.h b/src/drivers/intel/fsp2_0/include/fsp/memmap.h
new file mode 100644
index 0000000000..965bce646e
--- /dev/null
+++ b/src/drivers/intel/fsp2_0/include/fsp/memmap.h
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015-2016 Intel Corporation.
+ *
+ * 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.
+ */
+
+#ifndef _COMMON_MEMMAP_H_
+#define _COMMON_MEMMAP_H_
+
+#include <types.h>
+
+/*
+ * mmap_region_granularity must to return a size which is a positive non-zero
+ * integer multiple of the SMM size when SMM is in use. When not using SMM,
+ * this value should be set to 8 MiB.
+ */
+size_t mmap_region_granularity(void);
+
+/* Fills in the arguments for the entire SMM region covered by chipset
+ * protections. e.g. TSEG. */
+void smm_region(void **start, size_t *size);
+
+enum {
+ /* SMM handler area. */
+ SMM_SUBREGION_HANDLER,
+ /* SMM cache region. */
+ SMM_SUBREGION_CACHE,
+ /* Chipset specific area. */
+ SMM_SUBREGION_CHIPSET,
+ /* Total sub regions supported. */
+ SMM_SUBREGION_NUM,
+};
+
+/* Fills in the start and size for the requested SMM subregion. Returns
+ * 0 on susccess, < 0 on failure. */
+int smm_subregion(int sub, void **start, size_t *size);
+
+#endif /* _COMMON_MEMMAP_H_ */
diff --git a/src/drivers/intel/fsp2_0/stage_cache.c b/src/drivers/intel/fsp2_0/stage_cache.c
new file mode 100644
index 0000000000..2d594e6048
--- /dev/null
+++ b/src/drivers/intel/fsp2_0/stage_cache.c
@@ -0,0 +1,28 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ * Copyright (C) 2015 Intel Corp.
+ *
+ * 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 <console/console.h>
+#include <fsp/memmap.h>
+#include <stage_cache.h>
+
+void stage_cache_external_region(void **base, size_t *size)
+{
+ if (smm_subregion(SMM_SUBREGION_CACHE, base, size)) {
+ printk(BIOS_ERR, "ERROR: No cache SMM subregion.\n");
+ *base = NULL;
+ *size = 0;
+ }
+}