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| author | Stephen Warren <swarren@nvidia.com> | 2011-11-01 06:28:21 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2012-03-06 22:18:48 +0100 |
| commit | e37ae40e9dec9af417c19de72f76becebf160730 (patch) | |
| tree | 0c0a995c06c4153459089636910258473f570db3 | |
| parent | 23498935faa59922c90f636e1ce8364510803819 (diff) | |
| download | u-boot-imx-e37ae40e9dec9af417c19de72f76becebf160730.zip u-boot-imx-e37ae40e9dec9af417c19de72f76becebf160730.tar.gz u-boot-imx-e37ae40e9dec9af417c19de72f76becebf160730.tar.bz2 | |
image: Support FDTs already loaded at their load address
boot_get_fdt() expects a uImage-wrapped FDT to be loaded to a staging
location, and then memmove()s it to the load address specified in the
header. This change enhances boot_get_fdt() to detect when the image has
already been loaded to the correct address, and skip this memmove(). The
detection algorithm was written to match the equivalent for the kernel;
see bootm_load_os()'s IH_COMP_NONE case.
v2: New patch
Signed-off-by: Stephen Warren <swarren@nvidia.com>
| -rw-r--r-- | common/image.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/common/image.c b/common/image.c index fbdc40a..95c7a15 100644 --- a/common/image.c +++ b/common/image.c @@ -1374,7 +1374,7 @@ int boot_get_fdt(int flag, int argc, char * const argv[], const image_header_t *fdt_hdr; ulong fdt_addr; char *fdt_blob = NULL; - ulong image_start, image_end; + ulong image_start, image_data, image_end; ulong load_start, load_end; #if defined(CONFIG_FIT) void *fit_hdr; @@ -1482,21 +1482,28 @@ int boot_get_fdt(int flag, int argc, char * const argv[], * make sure we don't overwrite initial image */ image_start = (ulong)fdt_hdr; + image_data = (ulong)image_get_data(fdt_hdr); image_end = image_get_image_end(fdt_hdr); load_start = image_get_load(fdt_hdr); load_end = load_start + image_get_data_size(fdt_hdr); + if (load_start == image_start || + load_start == image_data) { + fdt_blob = (char *)image_data; + break; + } + if ((load_start < image_end) && (load_end > image_start)) { fdt_error("fdt overwritten"); goto error; } debug(" Loading FDT from 0x%08lx to 0x%08lx\n", - image_get_data(fdt_hdr), load_start); + image_data, load_start); memmove((void *)load_start, - (void *)image_get_data(fdt_hdr), + (void *)image_data, image_get_data_size(fdt_hdr)); fdt_blob = (char *)load_start; |