Change in coreboot[master]: [WIP]: Cache ext BIOS window as CBFS read is pointing this range

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/57755 )

Change subject: [WIP]: Cache ext BIOS window as CBFS read is pointing this range
......................................................................

[WIP]: Cache ext BIOS window as CBFS read is pointing this range

Change-Id: I30aa96382f2627068d904725de777d93754f2b39
Signed-off-by: Subrata Banik 
---
M src/arch/x86/include/arch/romstage.h
M src/arch/x86/postcar_loader.c
2 files changed, 15 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/55/57755/1

diff --git a/src/arch/x86/include/arch/romstage.h b/src/arch/x86/include/arch/romstage.h
index 28d29bf..1741923 100644
--- a/src/arch/x86/include/arch/romstage.h
+++ b/src/arch/x86/include/arch/romstage.h
@@ -39,6 +39,8 @@
  */
 void postcar_frame_add_romcache(struct postcar_frame *pcf, int type);

+void postcar_frame_add_extwindow_cache(struct postcar_frame *pcf, int type);
+
 /*
  * fill_postcar_frame() is called after raminit completes and right before
  * calling run_postcar_phase(). Implementation should call postcar_frame_add_mtrr()
diff --git a/src/arch/x86/postcar_loader.c b/src/arch/x86/postcar_loader.c
index 8a5f902..0552404 100644
--- a/src/arch/x86/postcar_loader.c
+++ b/src/arch/x86/postcar_loader.c
@@ -74,11 +74,18 @@
    var_mtrr_set_with_cb(&pcf->ctx, addr, size, type, postcar_var_mtrr_set);
 }

+void postcar_frame_add_extwindow_cache(struct postcar_frame *pcf, int type)
+{
+	if (!CONFIG(FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW))
+		return;
+	postcar_frame_add_mtrr(pcf, EXT_BIOS_WIN_BASE, EXT_BIOS_WIN_SIZE, type);
+}
+
 void postcar_frame_add_romcache(struct postcar_frame *pcf, int type)
 {
-	if (!CONFIG(BOOT_DEVICE_MEMORY_MAPPED))
-		return;
-	postcar_frame_add_mtrr(pcf, CACHE_ROM_BASE, CACHE_ROM_SIZE, type);
+        if (!CONFIG(BOOT_DEVICE_MEMORY_MAPPED))
+                return;
+        postcar_frame_add_mtrr(pcf, CACHE_ROM_BASE, CACHE_ROM_SIZE, type);
 }

static void postcar_frame_common_mtrrs(struct postcar_frame *pcf)
@@ -88,6 +95,9 @@

/* Cache the ROM as WP just below 4GiB. */
    postcar_frame_add_romcache(pcf, MTRR_TYPE_WRPROT);
+
+	/* Cache the ext BIOS windows */
+	postcar_frame_add_extwindow_cache(pcf, MTRR_TYPE_WRPROT);
 }

/* prepare_and_run_postcar() determines the stack to use after