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authorStefan Reinauer <reinauer@chromium.org>2012-05-23 14:16:47 -0700
committerPatrick Georgi <patrick@georgi-clan.de>2012-05-29 11:27:42 +0200
commit88fc0b9e8da89cd41350ca0ac54297f2ebf3bf10 (patch)
treeb23d1314091eae2aa7d562e338011be4ca3f5778 /src/northbridge/intel
parent6e901fd3d267fafe97bb8404702919ce5e21a0e1 (diff)
Sandybridge: Remove remnants of FDT support from MRC cache code
Originally, ChromeBooks would get the offset of the MRC cache from an entry in the u-boot device tree. Not everyone wants to use u-boot on Sandybridge systems, however. Since the new code (based on Kconfig) is now fully working, we can drop the u-boot device tree remnants. Change-Id: I4e012ea981f16dce9a4d155254facd29874b28ef Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/1051 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Diffstat (limited to 'src/northbridge/intel')
-rw-r--r--src/northbridge/intel/sandybridge/mrccache.c80
1 files changed, 11 insertions, 69 deletions
diff --git a/src/northbridge/intel/sandybridge/mrccache.c b/src/northbridge/intel/sandybridge/mrccache.c
index aad2b9104f..d774ff0988 100644
--- a/src/northbridge/intel/sandybridge/mrccache.c
+++ b/src/northbridge/intel/sandybridge/mrccache.c
@@ -28,19 +28,6 @@
#include "sandybridge.h"
#include <spi.h>
#include <spi_flash.h>
-/* Using the FDT FMAP for finding the MRC cache area requires including FDT
- * support in coreboot, which we would like to avoid. There are a number of
- * options:
- * - Have each mainboard Kconfig supply a hard-coded offset
- * - For ChromeOS devices: implement native FMAP
- * - For non-ChromeOS devices: use CBFS
- * For now let's leave this code in here until the issue is sorted out in
- * a way that works for everyone.
- */
-#undef USE_FDT_FMAP_FOR_MRC_CACHE
-#ifdef USE_FDT_FMAP_FOR_MRC_CACHE
-#include <fdt/libfdt.h>
-#endif
struct mrc_data_container *next_mrc_block(struct mrc_data_container *mrc_cache)
{
@@ -61,64 +48,19 @@ int is_mrc_cache(struct mrc_data_container *mrc_cache)
return (!!mrc_cache) && (mrc_cache->mrc_signature == MRC_DATA_SIGNATURE);
}
+/* Right now, the offsets for the MRC cache area are hard-coded in the
+ * northbridge Kconfig. In order to make this more flexible, there are
+ * a number of options:
+ * - Have each mainboard Kconfig supply a hard-coded offset
+ * - For ChromeOS devices: implement native FMAP
+ * - For non-ChromeOS devices: use CBFS
+ */
u32 get_mrc_cache_region(struct mrc_data_container **mrc_region_ptr)
{
- u8 *mrc_region;
- u32 region_size;
-#ifdef USE_FDT_FMAP_FOR_MRC_CACHE
- u32 *data;
- const struct fdt_header *fdt_header;
- const struct fdt_property *fdtp;
- int offset, len;
- const char *compatible = "chromeos,flashmap";
- const char *subnode = "rw-mrc-cache";
- const char *property = "reg";
- u64 flashrom_base = 0;
-
- fdt_header = cbfs_find_file(CONFIG_FDT_FILE_NAME, CBFS_TYPE_FDT);
-
- if (!fdt_header) {
- printk(BIOS_ERR, "%s: no FDT found!\n", __func__);
- return 0;
- }
-
- offset = fdt_node_offset_by_compatible(fdt_header, 0, compatible);
- if (offset < 0) {
- printk(BIOS_ERR, "%s: no %s node found!\n",
- __func__, compatible);
- return 0;
- }
-
- if (fdt_get_base_addr(fdt_header, offset, &flashrom_base) < 0) {
- printk(BIOS_ERR, "%s: no base address in node name!\n",
- __func__);
- return 0;
- }
-
- offset = fdt_subnode_offset(fdt_header, offset, subnode);
- if (offset < 0) {
- printk(BIOS_ERR, "%s: no %s found!\n", __func__, subnode);
- return 0;
- }
-
- fdtp = fdt_get_property(fdt_header, offset, property, &len);
- if (!fdtp || (len != 8)) {
- printk(BIOS_ERR, "%s: property %s at %p, len %d!\n",
- __func__, property, fdtp, len);
- return 0;
- }
-
- data = (u32 *)fdtp->data;
-
- // Calculate actual address of the MRC cache in memory
- region_size = fdt32_to_cpu(data[1]);
- mrc_region = (u8*)((unsigned long)flashrom_base + fdt32_to_cpu(data[0]));
-#else
- region_size = CONFIG_MRC_CACHE_SIZE;
- mrc_region = (u8*)(CONFIG_MRC_CACHE_BASE + CONFIG_MRC_CACHE_LOCATION);
-#endif
- *mrc_region_ptr = (struct mrc_data_container *)mrc_region;
+ u32 region_size = CONFIG_MRC_CACHE_SIZE;
+ *mrc_region_ptr = (struct mrc_data_container *)
+ (CONFIG_MRC_CACHE_BASE + CONFIG_MRC_CACHE_LOCATION);
return region_size;
}
@@ -182,7 +124,7 @@ struct mrc_data_container *find_current_mrc_cache(void)
entry_id++;
mrc_cache = mrc_next;
mrc_next = next_mrc_block(mrc_cache);
- /* Stay in the mrcdata region defined in fdt */
+ /* Stay in the mrc data region */
if ((void*)mrc_next >= (void*)(mrc_region + region_size))
break;
}