arch/x86: Add postcar_frame_common_mtrrs()

As most platforms will share the subset of enabling
both low RAM WB and high ROM WP MTRRs, provide them
with a single function.

Add possibility for the platform to skip these if
required.

Change-Id: Id1f8b7682035e654231f6133a42909a36e3e15a1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34809
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

9 files changed, 2 insertions, 55 deletions

diff --git a/src/northbridge/intel/e7505/memmap.c b/src/northbridge/intel/e7505/memmap.c
index c3b59e9415..7033f89a04 100644
--- a/src/northbridge/intel/e7505/memmap.c
+++ b/src/northbridge/intel/e7505/memmap.c
@@ -54,6 +54,8 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 	 * operations when source is left as UC.
 	 */
 
+	pcf->skip_common_mtrr = 1;
+
 	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
 	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
 
diff --git a/src/northbridge/intel/gm45/memmap.c b/src/northbridge/intel/gm45/memmap.c
index 9337470e1e..71037aedd0 100644
--- a/src/northbridge/intel/gm45/memmap.c
+++ b/src/northbridge/intel/gm45/memmap.c
@@ -138,13 +138,6 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 {
 	uintptr_t top_of_ram;
 
-
-	/* Cache the ROM as WP just below 4GiB. */
-	postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
-
-	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
-	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
-
 	/* Cache 8 MiB region below the top of ram and 2 MiB above top of
 	 * ram to cover both cbmem as the TSEG region.
 	 */
diff --git a/src/northbridge/intel/haswell/memmap.c b/src/northbridge/intel/haswell/memmap.c
index 13881e99b2..f43bd2f3bc 100644
--- a/src/northbridge/intel/haswell/memmap.c
+++ b/src/northbridge/intel/haswell/memmap.c
@@ -57,12 +57,6 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 {
 	uintptr_t top_of_ram;
 
-	/* Cache the ROM as WP just below 4GiB. */
-	postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
-
-	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
-	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
-
 	/* Cache at least 8 MiB below the top of ram, and at most 8 MiB
 	 * above top of the ram. This satisfies MTRR alignment requirement
 	 * with different TSEG size configurations.
diff --git a/src/northbridge/intel/i440bx/memmap.c b/src/northbridge/intel/i440bx/memmap.c
index 084679ff4a..e4e5de7fc3 100644
--- a/src/northbridge/intel/i440bx/memmap.c
+++ b/src/northbridge/intel/i440bx/memmap.c
@@ -72,13 +72,6 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 {
 	uintptr_t top_of_ram;
 
-
-	/* Cache the ROM as WP just below 4GiB. */
-	postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
-
-	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
-	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
-
 	/* Cache CBMEM region as WB. */
 	top_of_ram = (uintptr_t)cbmem_top();
 	postcar_frame_add_mtrr(pcf, top_of_ram - 8*MiB, 8*MiB,
diff --git a/src/northbridge/intel/i945/memmap.c b/src/northbridge/intel/i945/memmap.c
index 5f3e2569fb..6092c25770 100644
--- a/src/northbridge/intel/i945/memmap.c
+++ b/src/northbridge/intel/i945/memmap.c
@@ -104,13 +104,6 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 {
 	uintptr_t top_of_ram;
 
-
-	/* Cache the ROM as WP just below 4GiB. */
-	postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
-
-	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
-	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
-
 	/* Cache 8 MiB region below the top of ram and 2 MiB above top of
 	 * ram to cover both cbmem as the TSEG region.
 	 */
diff --git a/src/northbridge/intel/nehalem/memmap.c b/src/northbridge/intel/nehalem/memmap.c
index 1a3a6d7cdf..031240c2f3 100644
--- a/src/northbridge/intel/nehalem/memmap.c
+++ b/src/northbridge/intel/nehalem/memmap.c
@@ -62,13 +62,6 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 {
 	uintptr_t top_of_ram;
 
-
-	/* Cache the ROM as WP just below 4GiB. */
-	postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
-
-	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
-	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
-
 	/* Cache at least 8 MiB below the top of ram, and at most 8 MiB
 	 * above top of the ram. This satisfies MTRR alignment requirement
 	 * with different TSEG size configurations.
diff --git a/src/northbridge/intel/pineview/memmap.c b/src/northbridge/intel/pineview/memmap.c
index 66900af2ef..2e028892e3 100644
--- a/src/northbridge/intel/pineview/memmap.c
+++ b/src/northbridge/intel/pineview/memmap.c
@@ -154,13 +154,6 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 {
 	uintptr_t top_of_ram;
 
-
-	/* Cache the ROM as WP just below 4GiB. */
-	postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
-
-	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
-	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
-
 	/* Cache 8 MiB region below the top of ram and 2 MiB above top of
 	 * ram to cover both cbmem as the TSEG region.
 	 */
diff --git a/src/northbridge/intel/sandybridge/memmap.c b/src/northbridge/intel/sandybridge/memmap.c
index 99f11a0f2a..83a67abeb8 100644
--- a/src/northbridge/intel/sandybridge/memmap.c
+++ b/src/northbridge/intel/sandybridge/memmap.c
@@ -61,13 +61,6 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 {
 	uintptr_t top_of_ram;
 
-
-	/* Cache the ROM as WP just below 4GiB. */
-	postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
-
-	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
-	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
-
 	top_of_ram = (uintptr_t)cbmem_top();
 	/* Cache 8MiB below the top of ram. On sandybridge systems the top of
 	 * ram under 4GiB is the start of the TSEG region. It is required to
diff --git a/src/northbridge/intel/x4x/memmap.c b/src/northbridge/intel/x4x/memmap.c
index 254ca880fa..a61d64e61d 100644
--- a/src/northbridge/intel/x4x/memmap.c
+++ b/src/northbridge/intel/x4x/memmap.c
@@ -149,13 +149,6 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 {
 	uintptr_t top_of_ram;
 
-
-	/* Cache the ROM as WP just below 4GiB. */
-	postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
-
-	/* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */
-	postcar_frame_add_mtrr(pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
-
 	/* Cache 8 MiB region below the top of ram and 2 MiB above top of
 	 * ram to cover both cbmem as the TSEG region.
 	 */