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Diffstat (limited to 'include/dm/of_extra.h')
-rw-r--r-- | include/dm/of_extra.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/include/dm/of_extra.h b/include/dm/of_extra.h new file mode 100644 index 0000000..ca15df2 --- /dev/null +++ b/include/dm/of_extra.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2017 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + */ + +#ifndef _DM_OF_EXTRA_H +#define _DM_OF_EXTRA_H + +#include <dm/ofnode.h> + +enum fmap_compress_t { + FMAP_COMPRESS_NONE, + FMAP_COMPRESS_LZ4, +}; + +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 */ + uint32_t unc_length; /* Uncompressed length */ + enum fmap_hash_t hash_algo; /* Hash algorithm */ + const uint8_t *hash; /* Hash value */ + int hash_size; /* Hash size */ +}; + +/** + * Read a flash entry from the fdt + * + * @param node Reference to node to read + * @param entry Place to put offset and size of this node + * @return 0 if ok, -ve on error + */ +int ofnode_read_fmap_entry(ofnode node, struct fmap_entry *entry); + +/** + * ofnode_decode_region() - Decode a memory region from a node + * + * Look up a property in a node which contains a memory region address and + * size. Then return a pointer to this address. + * + * The property must hold one address with a length. This is only tested on + * 32-bit machines. + * + * @param node ofnode to examine + * @param prop_name name of property to find + * @param basep Returns base address of region + * @param size Returns size of region + * @return 0 if ok, -1 on error (property not found) + */ +int ofnode_decode_region(ofnode node, const char *prop_name, fdt_addr_t *basep, + fdt_size_t *sizep); + +/** + * ofnode_decode_memory_region()- Decode a named region within a memory bank + * + * This function handles selection of a memory region. The region is + * specified as an offset/size within a particular type of memory. + * + * The properties used are: + * + * <mem_type>-memory<suffix> for the name of the memory bank + * <mem_type>-offset<suffix> for the offset in that bank + * + * The property value must have an offset and a size. The function checks + * that the region is entirely within the memory bank.5 + * + * @param node ofnode containing the properties (-1 for /config) + * @param mem_type Type of memory to use, which is a name, such as + * "u-boot" or "kernel". + * @param suffix String to append to the memory/offset + * property names + * @param basep Returns base of region + * @param sizep Returns size of region + * @return 0 if OK, -ive on error + */ +int ofnode_decode_memory_region(ofnode config_node, const char *mem_type, + const char *suffix, fdt_addr_t *basep, + fdt_size_t *sizep); + +#endif |