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authorLee Leahy <leroy.p.leahy@intel.com>2016-01-29 14:35:13 -0800
committerLeroy P Leahy <leroy.p.leahy@intel.com>2016-02-02 19:00:35 +0100
commit95909924024687d42cdf34518d34d7c8eb1aee57 (patch)
tree7e536d1a0d45009527bcf7db53c873b4d4dfc4a5 /src/drivers
parent05c0215ff31c80a06e3824fb55f5983b62f894cd (diff)
downloadcoreboot-95909924024687d42cdf34518d34d7c8eb1aee57.tar.xz
soc/intel/common: Use SoC specific routine to read/write MTRRs
The registers associated with the MTRRs for Quark are referenced through a port on the host bridge. Support the standard configurations by providing a weak routines which just do a rdmsr/wrmsr. Testing: * Edit the src/mainboard/intel/galileo/Makefile.inc file * Add "select DISPLAY_MTRRS" * Add "select HAVE_FSP_PDAT_FILE" * Add "select HAVE_FSP_RAW_BIN" * Add "select HAVE_RMU_FILE" * Place the FSP.bin file in the location specified by CONFIG_FSP_FILE * Place the pdat.bin files in the location specified by CONFIG_FSP_PDAT_FILE * Place the rmu.bin file in the location specified by CONFIG_RMU_FILE * Testing is successful if: * The MTRRs are displayed and * The message "FspTempRamExit returned successfully" is displayed TEST=Build and run on Galileo Change-Id: If2fea66d4b054be4555f5f172ea5945620648325 Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-on: https://review.coreboot.org/13529 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/drivers')
-rw-r--r--src/drivers/intel/fsp1_1/after_raminit.S13
-rw-r--r--src/drivers/intel/fsp1_1/include/fsp/romstage.h7
2 files changed, 20 insertions, 0 deletions
diff --git a/src/drivers/intel/fsp1_1/after_raminit.S b/src/drivers/intel/fsp1_1/after_raminit.S
index eb99157959..122c0bf03e 100644
--- a/src/drivers/intel/fsp1_1/after_raminit.S
+++ b/src/drivers/intel/fsp1_1/after_raminit.S
@@ -87,6 +87,13 @@
* +0: Number of variable MTRRs to clear
*/
+#if IS_ENABLED(CONFIG_SOC_SETS_MTRRS)
+ push %esp
+ call soc_set_mtrrs
+
+ /* eax: new top_of_stack with setup_stack_and_mtrrs data removed */
+ movl %eax, %esp
+#else
/* Clear all of the variable MTRRs. */
popl %ebx
movl $MTRR_PHYS_BASE(0), %ecx
@@ -129,6 +136,8 @@
dec %ebx
jmp 2b
2:
+#endif /* CONFIG_SOC_SETS_MTRRS */
+
post_code(0x39)
/* And enable cache again after setting MTRRs. */
@@ -138,11 +147,15 @@
post_code(0x3a)
+#if IS_ENABLED(CONFIG_SOC_SETS_MTRRS)
+ call soc_enable_mtrrs
+#else
/* Enable MTRR. */
movl $MTRR_DEF_TYPE_MSR, %ecx
rdmsr
orl $MTRR_DEF_TYPE_EN, %eax
wrmsr
+#endif /* CONFIG_SOC_SETS_MTRRS */
post_code(0x3b)
diff --git a/src/drivers/intel/fsp1_1/include/fsp/romstage.h b/src/drivers/intel/fsp1_1/include/fsp/romstage.h
index 4683f5e5a2..d07dc375c8 100644
--- a/src/drivers/intel/fsp1_1/include/fsp/romstage.h
+++ b/src/drivers/intel/fsp1_1/include/fsp/romstage.h
@@ -88,4 +88,11 @@ void soc_memory_init_params(struct romstage_params *params,
MEMORY_INIT_UPD *upd);
void soc_pre_ram_init(struct romstage_params *params);
+/*
+ * Set the MTRRs using the data on the stack from setup_stack_and_mtrrs.
+ * Return a new top_of_stack value which removes the setup_stack_and_mtrrs data.
+ */
+asmlinkage void *soc_set_mtrrs(void *top_of_stack);
+asmlinkage void soc_enable_mtrrs(void);
+
#endif /* _COMMON_ROMSTAGE_H_ */