lib/stage_cache: Add save/get raw storage

Leverage the stage_cache mechanism to store a non-specific type
of data.  This is not interesting when the location for the cache
is in cbmem.  However it will be more useful when an external
location is used, e.g. when the cache is in TSEG, locked from user
modification.

Change-Id: Iaf0b25ebe14c176bbd24fc8942f902f627ca8e6f
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/23518
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/lib/cbmem_stage_cache.c b/src/lib/cbmem_stage_cache.c
index f17f12c892..299cb00dcf 100644
--- a/src/lib/cbmem_stage_cache.c
+++ b/src/lib/cbmem_stage_cache.c
@@ -45,6 +45,35 @@ void stage_cache_add(int stage_id, const struct prog *stage)
 	memcpy(c, prog_start(stage), prog_size(stage));
 }
 
+void stage_cache_add_raw(int stage_id, const void *base, const size_t size)
+{
+	void *c;
+
+	c = cbmem_add(CBMEM_ID_STAGEx_RAW + stage_id, size);
+	if (c == NULL) {
+		printk(BIOS_DEBUG, "Error: Can't add %x raw data to cbmem\n",
+				CBMEM_ID_STAGEx_RAW + stage_id);
+		return;
+	}
+
+	memcpy(c, base, size);
+}
+
+void stage_cache_get_raw(int stage_id, void **base, size_t *size)
+{
+	const struct cbmem_entry *e;
+
+	e = cbmem_entry_find(CBMEM_ID_STAGEx_RAW + stage_id);
+	if (e == NULL) {
+		printk(BIOS_ERR, "Error: Can't find raw %x data in cbmem\n",
+				CBMEM_ID_STAGEx_RAW + stage_id);
+		return;
+	}
+
+	*base = cbmem_entry_start(e);
+	*size = cbmem_entry_size(e);
+}
+
 void stage_cache_load_stage(int stage_id, struct prog *stage)
 {
 	struct stage_cache *meta;