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authorAaron Durbin <adurbin@chromium.org>2013-02-15 21:45:06 -0600
committerRonald G. Minnich <rminnich@gmail.com>2013-03-21 22:59:03 +0100
commit8ce667e50684bea7c60db43c0ca7dd1b3ec3fde3 (patch)
tree5f68514d230ee7ebd0c60c9c667403ab06adf17b /src/cpu/intel
parent67481ddc2e53cd3420fa8c723edb4fe47dccc196 (diff)
haswell: add multipurpose SMM memory region
The SMM region is available for multipurpose use before the SMM handler is relocated. Provide a configurable sized region in the TSEG for use before the SMM handler is relocated. This feature is implemented by making the reserved size a Kconfig option. Also make the IED region a Kconfig option as well. Lastly add some sanity checking on the Kconfig options. Change-Id: Idd7fccf925a8787146906ac766b7878845c75935 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/2804 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/cpu/intel')
-rw-r--r--src/cpu/intel/haswell/Kconfig8
-rw-r--r--src/cpu/intel/haswell/haswell.h20
-rw-r--r--src/cpu/intel/haswell/smmrelocate.c3
3 files changed, 31 insertions, 0 deletions
diff --git a/src/cpu/intel/haswell/Kconfig b/src/cpu/intel/haswell/Kconfig
index 95d0b18ff2..b49795dd91 100644
--- a/src/cpu/intel/haswell/Kconfig
+++ b/src/cpu/intel/haswell/Kconfig
@@ -29,6 +29,14 @@ config SMM_TSEG_SIZE
hex
default 0x800000
+config IED_REGION_SIZE
+ hex
+ default 0x400000
+
+config SMM_RESERVED_SIZE
+ hex
+ default 0x100000
+
config MICROCODE_INCLUDE_PATH
string
default "src/cpu/intel/haswell"
diff --git a/src/cpu/intel/haswell/haswell.h b/src/cpu/intel/haswell/haswell.h
index a510e7de58..3a5ebe65ae 100644
--- a/src/cpu/intel/haswell/haswell.h
+++ b/src/cpu/intel/haswell/haswell.h
@@ -100,6 +100,26 @@
#define PSS_LATENCY_TRANSITION 10
#define PSS_LATENCY_BUSMASTER 10
+/* Region of SMM space is reserved for multipurpose use. It falls below
+ * the IED region and above the SMM handler. */
+#define RESERVED_SMM_SIZE CONFIG_SMM_RESERVED_SIZE
+#define RESERVED_SMM_OFFSET \
+ (CONFIG_SMM_TSEG_SIZE - CONFIG_IED_REGION_SIZE - RESERVED_SMM_SIZE)
+
+/* Sanity check config options. */
+#if (CONFIG_SMM_TSEG_SIZE <= (CONFIG_IED_REGION_SIZE + RESERVED_SMM_SIZE))
+# error "CONFIG_SMM_TSEG_SIZE <= (CONFIG_IED_REGION_SIZE + RESERVED_SMM_SIZE)"
+#endif
+#if (CONFIG_SMM_TSEG_SIZE < 0x800000)
+# error "CONFIG_SMM_TSEG_SIZE must at least be 8MiB"
+#endif
+#if ((CONFIG_SMM_TSEG_SIZE & (CONFIG_SMM_TSEG_SIZE - 1)) != 0)
+# error "CONFIG_SMM_TSEG_SIZE is not a power of 2"
+#endif
+#if ((CONFIG_IED_REGION_SIZE & (CONFIG_IED_REGION_SIZE - 1)) != 0)
+# error "CONFIG_IED_REGION_SIZE is not a power of 2"
+#endif
+
#ifndef __ROMCC__
#if defined(__PRE_RAM__)
diff --git a/src/cpu/intel/haswell/smmrelocate.c b/src/cpu/intel/haswell/smmrelocate.c
index 2a322a7f9a..65ac36388f 100644
--- a/src/cpu/intel/haswell/smmrelocate.c
+++ b/src/cpu/intel/haswell/smmrelocate.c
@@ -258,6 +258,9 @@ static void fill_in_relocation_params(device_t dev,
params->ied_base = tsegmb + params->smram_size;
params->ied_size = tseg_size - params->smram_size;
+ /* Adjust available SMM handler memory size. */
+ params->smram_size -= RESERVED_SMM_SIZE;
+
/* SMRR has 32-bits of valid address aligned to 4KiB. */
params->smrr_base.lo = (params->smram_base & rmask) | MTRR_TYPE_WRBACK;
params->smrr_base.hi = 0;