[coreboot-gerrit] Change in coreboot[master]: lib/imd_cbmem.c: Add a helper function to indicate that cbmem is ready

[Arthur Heymans (Code Review)]

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/38736 )

Change subject: lib/imd_cbmem.c: Add a helper function to indicate that cbmem is ready
......................................................................

lib/imd_cbmem.c: Add a helper function to indicate that cbmem is ready

This can be used in romstage in particular to know if dram is ready.

Change-Id: I0231ab9c0b78a69faa762e0a97378bf0b50eebaf
Signed-off-by: Arthur Heymans 
---
M src/include/cbmem.h
M src/lib/imd_cbmem.c
2 files changed, 19 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/36/38736/1

diff --git a/src/include/cbmem.h b/src/include/cbmem.h
index cf79f41..a68d65f 100644
--- a/src/include/cbmem.h
+++ b/src/include/cbmem.h
@@ -81,6 +81,9 @@
  */
 void *cbmem_top_chipset(void);

+/* Returns 1 if cbmem is initialized, 0 otherwise */
+int cbmem_ready(void);
+
 /* Add a cbmem entry of a given size and id. These return NULL on failure. The
  * add function performs a find first and do not check against the original
  * size. */
diff --git a/src/lib/imd_cbmem.c b/src/lib/imd_cbmem.c
index 5be7dc4..864d73e 100644
--- a/src/lib/imd_cbmem.c
+++ b/src/lib/imd_cbmem.c
@@ -44,6 +44,22 @@
    dead_code();
 }

+static int cbmem_initialized;
+
+static void set_cbmem_ready(int unused)
+{
+	cbmem_initialized = 1;
+}
+
+ROMSTAGE_CBMEM_INIT_HOOK(set_cbmem_ready);
+POSTCAR_CBMEM_INIT_HOOK(set_cbmem_ready);
+RAMSTAGE_CBMEM_INIT_HOOK(set_cbmem_ready);
+
+int cbmem_ready(void)
+{
+	return cbmem_initialized;
+}
+
 static inline const struct cbmem_entry *imd_to_cbmem(const struct imd_entry *e)
 {
    return (const struct cbmem_entry *)e;