0021-kgpe-d16_c-environment_bootblock.patch

From 92023c6cfc3db86f9236a01897754a1579afdf64 Mon Sep 17 00:00:00 2001
From: Arthur Heymans <arthur@aheymans.xyz>
Date: Sun, 17 Nov 2019 12:20:30 +0100
Subject: [PATCH] lib/fmap.c: Properly handle cache for
 !C_ENVIRONMENT_BOOTBLOCK

On platforms without C_ENVIRONMENT_BOOTBLOCK the first stage
accessing FMAP is romstage.

Change-Id: I7d70585b0c076707e73e20c2ed3f11e4c9ffdf37
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
---
 src/lib/fmap.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/lib/fmap.c b/src/lib/fmap.c
index 48aab8f3d5..06e9e202b6 100644
--- a/src/lib/fmap.c
+++ b/src/lib/fmap.c
@@ -58,6 +58,12 @@ static void report(const struct fmap *fmap)
 	car_set_var(fmap_print_once, 1);
 }
 
+#if CONFIG(C_ENVIRONMENT_BOOTBLOCK)
+#define FIRST_C_STAGE ENV_BOOTBLOCK
+#else
+#define FIRST_C_STAGE ENV_ROMSTAGE
+#endif
+
 static void setup_preram_cache(struct mem_region_device *cache_mrdev)
 {
 	if (CONFIG(NO_FMAP_CACHE))
@@ -81,10 +87,10 @@ static void setup_preram_cache(struct mem_region_device *cache_mrdev)
 	}
 
 	struct fmap *fmap = (struct fmap *)_fmap_cache;
-	if (!ENV_BOOTBLOCK) {
-		/* NOTE: This assumes that for all platforms running this code,
-		   the bootblock is the first stage and the bootblock will make
-		   at least one FMAP access (usually from finding CBFS). */
+	/* NOTE: This assumes that for all platforms running this code,
+	   the first stage running in a C (!romcc) environment does
+	   at least one FMAP access (usually from finding CBFS). */
+	if (!FIRST_C_STAGE) {
 		if (!check_signature(fmap))
 			goto register_cache;
 
-- 
2.20.1