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fdt: Enhance flashmap function to deal with region properties

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Flash regions can optionally be compressed or hashed. Add the ability to
read this information from the flashmap.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Tom Rini <trini@ti.com>
This commit is contained in:
Simon Glass 2014-10-23 18:58:52 -06:00
parent 76489832b2
commit f3cc44f984
2 changed files with 24 additions and 0 deletions
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16
include/fdtdec.h
View file

@ -602,10 +602,26 @@ const u8 *fdtdec_locate_byte_array(const void *blob, int node,
int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
fdt_addr_t *basep, fdt_size_t *sizep);
enum fmap_compress_t {
FMAP_COMPRESS_NONE,
FMAP_COMPRESS_LZO,
};
enum fmap_hash_t {
FMAP_HASH_NONE,
FMAP_HASH_SHA1,
FMAP_HASH_SHA256,
};
/* A flash map entry, containing an offset and length */
struct fmap_entry {
uint32_t offset;
uint32_t length;
uint32_t used; /* Number of bytes used in region */
enum fmap_compress_t compress_algo; /* Compression type */
enum fmap_hash_t hash_algo; /* Hash algorithm */
const uint8_t *hash; /* Hash value */
int hash_size; /* Hash size */
};
/**

8
lib/fdtdec.c
View file

@ -703,6 +703,7 @@ int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
struct fmap_entry *entry)
{
const char *prop;
u32 reg[2];
if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
@ -711,6 +712,13 @@ int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
}
entry->offset = reg[0];
entry->length = reg[1];
entry->used = fdtdec_get_int(blob, node, "used", entry->length);
prop = fdt_getprop(blob, node, "compress", NULL);
entry->compress_algo = prop && !strcmp(prop, "lzo") ?
FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
entry->hash = (uint8_t *)prop;
return 0;
}