cbfs: new API and better program loading

A new CBFS API is introduced to allow making CBFS access
easier for providing multiple CBFS sources. That is achieved
by decoupling the cbfs source from a CBFS file. A CBFS
source is described by a descriptor. It contains the necessary
properties for walking a CBFS to locate a file. The CBFS
file is then decoupled from the CBFS descriptor in that it's
no longer needed to access the contents of the file.

All of this is accomplished using the regions infrastructure
by repsenting CBFS sources and files as region_devices. Because
region_devices can be chained together forming subregions this
allows one to decouple a CBFS source from a file. This also allows
one to provide CBFS files that came from other sources for
payload and/or stage loading.

The program loading takes advantage of those very properties
by allowing multiple sources for locating a program. Because of
this we can reduce the overhead of loading programs because
it's all done in the common code paths. Only locating the
program is per source.

Change-Id: I339b84fce95f03d1dbb63a0f54a26be5eb07f7c8
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9134
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

4 files changed, 8 insertions, 14 deletions

diff --git a/src/northbridge/amd/agesa/common/common.c b/src/northbridge/amd/agesa/common/common.c
index a77aea7..cc08ac1 100644
--- a/src/northbridge/amd/agesa/common/common.c
+++ b/src/northbridge/amd/agesa/common/common.c
@@ -38,7 +38,8 @@ AGESA_STATUS common_ReadCbfsSpd (UINT32 Func, UINT32 Data, VOID *ConfigPtr)
 
 	char *spd_file;
 
-	spd_file = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, "spd.bin", CBFS_TYPE_SPD_BIN, &spd_file_length);
+	spd_file = cbfs_boot_map_with_leak("spd.bin", CBFS_TYPE_SPD_BIN,
+						&spd_file_length);
 	if (!spd_file)
 		die("file [spd.bin] not found in CBFS");
 
diff --git a/src/northbridge/amd/agesa/def_callouts.c b/src/northbridge/amd/agesa/def_callouts.c
index fd3ceee..c07c063 100644
--- a/src/northbridge/amd/agesa/def_callouts.c
+++ b/src/northbridge/amd/agesa/def_callouts.c
@@ -117,8 +117,8 @@ AGESA_STATUS agesa_RunFuncOnAp (UINT32 Func, UINT32 Data, VOID *ConfigPtr)
 AGESA_STATUS agesa_GfxGetVbiosImage(UINT32 Func, UINT32 FchData, VOID *ConfigPrt)
 {
 	GFX_VBIOS_IMAGE_INFO  *pVbiosImageInfo = (GFX_VBIOS_IMAGE_INFO *)ConfigPrt;
-	pVbiosImageInfo->ImagePtr = cbfs_get_file_content(
-			CBFS_DEFAULT_MEDIA, "pci"CONFIG_VGA_BIOS_ID".rom",
+	pVbiosImageInfo->ImagePtr = cbfs_boot_map_with_leak(
+			"pci"CONFIG_VGA_BIOS_ID".rom",
 			CBFS_TYPE_OPTIONROM, NULL);
 	/* printk(BIOS_DEBUG, "IMGptr=%x\n", pVbiosImageInfo->ImagePtr); */
 	return pVbiosImageInfo->ImagePtr == NULL ? AGESA_WARNING : AGESA_SUCCESS;
diff --git a/src/northbridge/amd/pi/agesawrapper.c b/src/northbridge/amd/pi/agesawrapper.c
index 247a38f..1236932 100644
--- a/src/northbridge/amd/pi/agesawrapper.c
+++ b/src/northbridge/amd/pi/agesawrapper.c
@@ -593,20 +593,13 @@ AGESA_STATUS agesawrapper_amdreadeventlog (UINT8 HeapStatus)
 
 const void *agesawrapper_locate_module (const CHAR8 name[8])
 {
-	struct cbfs_media media;
-	struct cbfs_file* file;
 	const void* agesa;
 	const AMD_IMAGE_HEADER* image;
 	const AMD_MODULE_HEADER* module;
 	size_t file_size;
 
-	if (init_default_cbfs_media(&media))
-		return NULL;
-	file = cbfs_get_file(&media, (const char*)CONFIG_CBFS_AGESA_NAME);
-	if (!file)
-		return NULL;
-	agesa = cbfs_get_file_content(&media, (const char*)CONFIG_CBFS_AGESA_NAME,
-		ntohl(file->type), &file_size);
+	agesa = cbfs_boot_map_with_leak((const char *)CONFIG_CBFS_AGESA_NAME,
+					CBFS_TYPE_RAW, &file_size);
 	if (!agesa)
 		return NULL;
 	image =  LibAmdLocateImage(agesa, agesa + file_size - 1, 4096, name);
diff --git a/src/northbridge/amd/pi/def_callouts.c b/src/northbridge/amd/pi/def_callouts.c
index 0ff7f45..8a4472c 100644
--- a/src/northbridge/amd/pi/def_callouts.c
+++ b/src/northbridge/amd/pi/def_callouts.c
@@ -107,8 +107,8 @@ AGESA_STATUS agesa_RunFuncOnAp (UINT32 Func, UINT32 Data, VOID *ConfigPtr)
 AGESA_STATUS agesa_GfxGetVbiosImage(UINT32 Func, UINT32 FchData, VOID *ConfigPrt)
 {
 	GFX_VBIOS_IMAGE_INFO  *pVbiosImageInfo = (GFX_VBIOS_IMAGE_INFO *)ConfigPrt;
-	pVbiosImageInfo->ImagePtr = cbfs_get_file_content(
-			CBFS_DEFAULT_MEDIA, "pci"CONFIG_VGA_BIOS_ID".rom",
+	pVbiosImageInfo->ImagePtr = cbfs_boot_map_with_leak(
+			"pci"CONFIG_VGA_BIOS_ID".rom",
 			CBFS_TYPE_OPTIONROM, NULL);
 	printk(BIOS_DEBUG, "agesa_GfxGetVbiosImage: IMGptr=%p\n", pVbiosImageInfo->ImagePtr);
 	return (pVbiosImageInfo->ImagePtr ? AGESA_SUCCESS : AGESA_WARNING);