diff options
Diffstat (limited to 'fs/cbfs/cbfs.c')
| -rw-r--r-- | fs/cbfs/cbfs.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/fs/cbfs/cbfs.c b/fs/cbfs/cbfs.c index d9a8562e5c..35f919afee 100644 --- a/fs/cbfs/cbfs.c +++ b/fs/cbfs/cbfs.c @@ -187,6 +187,23 @@ static int file_cbfs_load_header(uintptr_t end_of_rom, return 0; } +static int cbfs_load_header_ptr(struct cbfs_priv *priv, ulong base, + struct cbfs_header *header) +{ + struct cbfs_header *header_in_rom; + + header_in_rom = (struct cbfs_header *)base; + swap_header(header, header_in_rom); + + if (header->magic != good_magic || header->offset > + header->rom_size - header->boot_block_size) { + priv->result = CBFS_BAD_HEADER; + return -EFAULT; + } + + return 0; +} + static void cbfs_init(struct cbfs_priv *priv, uintptr_t end_of_rom) { u8 *start_of_rom; @@ -209,6 +226,35 @@ void file_cbfs_init(uintptr_t end_of_rom) cbfs_init(&cbfs_s, end_of_rom); } +int cbfs_init_mem(ulong base, ulong size, struct cbfs_priv **privp) +{ + struct cbfs_priv priv_s, *priv = &priv_s; + int ret; + + /* + * Use a local variable to start with until we know that the CBFS is + * valid. Assume that a master header appears at the start, at offset + * 0x38. + */ + ret = cbfs_load_header_ptr(priv, base + 0x38, &priv->header); + if (ret) + return ret; + + file_cbfs_fill_cache(priv, (u8 *)base, priv->header.rom_size, + priv->header.align); + if (priv->result != CBFS_SUCCESS) + return -EINVAL; + + priv->initialized = 1; + priv = malloc(sizeof(priv_s)); + if (!priv) + return -ENOMEM; + memcpy(priv, &priv_s, sizeof(priv_s)); + *privp = priv; + + return 0; +} + const struct cbfs_header *file_cbfs_get_header(void) { struct cbfs_priv *priv = &cbfs_s; |