New patch to review for coreboot: 1e65b89 drivers/intel/fsp: Add find_saved_temp_mem()

[Martin Roth]

Martin Roth ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8194

-gerrit

commit 1e65b89ce5b15ed8764f75c6cc44117bae85b2cf
Author: Martin Roth 
Date:   Sun Jan 11 14:11:55 2015 -0700

drivers/intel/fsp: Add find_saved_temp_mem()

Add a function to retrieve the location of the CAR temporary memory
    that was saved by the FSP into the HOB structure.

Change-Id: I2635de5207cd699740721d333a7706425b837651
    Signed-off-by: Martin Roth 
---
 src/drivers/intel/fsp/fsp_util.c | 18 ++++++++++++++++++
 src/drivers/intel/fsp/fsp_util.h |  7 +++++++
 2 files changed, 25 insertions(+)

diff --git a/src/drivers/intel/fsp/fsp_util.c b/src/drivers/intel/fsp/fsp_util.c
index d0ed9cf..0844b37 100644
--- a/src/drivers/intel/fsp/fsp_util.c
+++ b/src/drivers/intel/fsp/fsp_util.c
@@ -177,6 +177,24 @@ volatile u8 * find_fsp ()
    return (fsp_ptr);
 }

+/** finds the saved temporary memory information in the FSP HOB list
+ *
+ * @param hob_list_ptr pointer to the start of the hob list
+ * @return pointer to saved CAR MEM or NULL if not found.
+ */
+void * find_saved_temp_mem(void *hob_list_ptr)
+{
+	EFI_GUID temp_hob_guid = FSP_BOOTLOADER_TEMPORARY_MEMORY_HOB_GUID;
+	EFI_HOB_GUID_TYPE *saved_mem_hob =
+			(EFI_HOB_GUID_TYPE *) find_hob_by_guid(
+			hob_list_ptr, &temp_hob_guid);
+
+	if (saved_mem_hob == NULL)
+		return NULL;
+
+	return (void *) ((char *) saved_mem_hob + sizeof(EFI_HOB_GUID_TYPE));
+}
+
 #ifndef __PRE_RAM__ /* Only parse HOB data in ramstage */

void print_fsp_info(void) {
diff --git a/src/drivers/intel/fsp/fsp_util.h b/src/drivers/intel/fsp/fsp_util.h
index 3c72f24..a39f5a2 100644
--- a/src/drivers/intel/fsp/fsp_util.h
+++ b/src/drivers/intel/fsp/fsp_util.h
@@ -37,6 +37,7 @@ void print_fsp_info(void);
 void chipset_fsp_early_init(FSP_INIT_PARAMS *FspInitParams,
    FSP_INFO_HEADER *fsp_ptr);
 void ChipsetFspReturnPoint(EFI_STATUS Status, VOID *HobListPtr);
+void * find_saved_temp_mem(void *hob_list_ptr);

/* functions in hob.c */
 void print_hob_mem_attributes(void *Hobptr);
@@ -124,4 +125,10 @@ extern void *FspHobListPtr;
    		UpdData->member?"Enabled":"Disabled"); \
    break;

+
+#ifndef FSP_BOOTLOADER_TEMPORARY_MEMORY_HOB_GUID
+#define FSP_BOOTLOADER_TEMPORARY_MEMORY_HOB_GUID \
+	{ 0xbbcff46c, 0xc8d3, 0x4113, { 0x89, 0x85, 0xb9, 0xd4, 0xf3, 0xb3, 0xf6, 0x4e } };
+#endif
+
 #endif	/* FSP_UTIL_H */