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>

5 files changed, 6 insertions, 10 deletions

diff --git a/src/northbridge/intel/haswell/mrccache.c b/src/northbridge/intel/haswell/mrccache.c
index d72c2c3224..481110f2fe 100644
--- a/src/northbridge/intel/haswell/mrccache.c
+++ b/src/northbridge/intel/haswell/mrccache.c
@@ -74,8 +74,7 @@ static u32 get_mrc_cache_region(struct mrc_data_container **mrc_region_ptr)
 			*mrc_region_ptr = rdev_mmap_full(&rdev);
 		}
 	} else {
-		*mrc_region_ptr = cbfs_get_file_content(CBFS_DEFAULT_MEDIA,
-							"mrc.cache",
+		*mrc_region_ptr = cbfs_boot_map_with_leak("mrc.cache",
 							CBFS_TYPE_MRC_CACHE,
 							&region_size);
 	}
diff --git a/src/northbridge/intel/haswell/raminit.c b/src/northbridge/intel/haswell/raminit.c
index 9bb1d8af61..86205abc24 100644
--- a/src/northbridge/intel/haswell/raminit.c
+++ b/src/northbridge/intel/haswell/raminit.c
@@ -162,8 +162,8 @@ void sdram_initialize(struct pei_data *pei_data)
 	pei_data->tx_byte = do_putchar;
 
 	/* Locate and call UEFI System Agent binary. */
-	entry = (unsigned long)cbfs_get_file_content(
-		CBFS_DEFAULT_MEDIA, "mrc.bin", CBFS_TYPE_MRC, NULL);
+	entry = (unsigned long)cbfs_boot_map_with_leak("mrc.bin",
+							CBFS_TYPE_MRC, NULL);
 	if (entry) {
 		int rv;
 		asm volatile (
diff --git a/src/northbridge/intel/i82830/vga.c b/src/northbridge/intel/i82830/vga.c
index 0fd197b7ff..7a79d13b81 100644
--- a/src/northbridge/intel/i82830/vga.c
+++ b/src/northbridge/intel/i82830/vga.c
@@ -31,8 +31,7 @@ static void vga_init(device_t dev)
 {
 	printk(BIOS_INFO, "Starting Graphics Initialization\n");
 	size_t mbi_len;
-	void *mbi = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, "mbi.bin",
-					  CBFS_TYPE_MBI, &mbi_len);
+	void *mbi = cbfs_boot_map_with_leak("mbi.bin", CBFS_TYPE_MBI, &mbi_len);
 
 	if (mbi && mbi_len) {
 		/* The GDT or coreboot table is going to live here. But
diff --git a/src/northbridge/intel/sandybridge/mrccache.c b/src/northbridge/intel/sandybridge/mrccache.c
index e17c54b7cd..94a7c396fb 100644
--- a/src/northbridge/intel/sandybridge/mrccache.c
+++ b/src/northbridge/intel/sandybridge/mrccache.c
@@ -74,8 +74,7 @@ static u32 get_mrc_cache_region(struct mrc_data_container **mrc_region_ptr)
 			*mrc_region_ptr = rdev_mmap_full(&rdev);
 		}
 	} else {
-		*mrc_region_ptr = cbfs_get_file_content(CBFS_DEFAULT_MEDIA,
-							"mrc.cache",
+		*mrc_region_ptr = cbfs_boot_map_with_leak("mrc.cache",
 							CBFS_TYPE_MRC_CACHE,
 							&region_size);
 	}
diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c
index 3cf0726d6a..053a4873cd 100644
--- a/src/northbridge/intel/sandybridge/raminit.c
+++ b/src/northbridge/intel/sandybridge/raminit.c
@@ -246,8 +246,7 @@ void sdram_initialize(struct pei_data *pei_data)
 	pei_data->tx_byte = do_putchar;
 
 	/* Locate and call UEFI System Agent binary. */
-	entry = cbfs_get_file_content(
-		CBFS_DEFAULT_MEDIA, "mrc.bin", CBFS_TYPE_MRC, NULL);
+	entry = cbfs_boot_map_with_leak("mrc.bin", CBFS_TYPE_MRC, NULL);
 	if (entry) {
 		int rv;
 		rv = entry (pei_data);