1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (c) 2017 Google, Inc 4 * Written by Simon Glass <sjg@chromium.org> 5 */ 6 7 #ifndef _DM_OF_EXTRA_H 8 #define _DM_OF_EXTRA_H 9 10 #include <dm/ofnode.h> 11 12 enum fmap_compress_t { 13 FMAP_COMPRESS_NONE, 14 FMAP_COMPRESS_LZO, 15 }; 16 17 enum fmap_hash_t { 18 FMAP_HASH_NONE, 19 FMAP_HASH_SHA1, 20 FMAP_HASH_SHA256, 21 }; 22 23 /* A flash map entry, containing an offset and length */ 24 struct fmap_entry { 25 uint32_t offset; 26 uint32_t length; 27 uint32_t used; /* Number of bytes used in region */ 28 enum fmap_compress_t compress_algo; /* Compression type */ 29 enum fmap_hash_t hash_algo; /* Hash algorithm */ 30 const uint8_t *hash; /* Hash value */ 31 int hash_size; /* Hash size */ 32 }; 33 34 /** 35 * Read a flash entry from the fdt 36 * 37 * @param node Reference to node to read 38 * @param entry Place to put offset and size of this node 39 * @return 0 if ok, -ve on error 40 */ 41 int ofnode_read_fmap_entry(ofnode node, struct fmap_entry *entry); 42 43 /** 44 * ofnode_decode_region() - Decode a memory region from a node 45 * 46 * Look up a property in a node which contains a memory region address and 47 * size. Then return a pointer to this address. 48 * 49 * The property must hold one address with a length. This is only tested on 50 * 32-bit machines. 51 * 52 * @param node ofnode to examine 53 * @param prop_name name of property to find 54 * @param basep Returns base address of region 55 * @param size Returns size of region 56 * @return 0 if ok, -1 on error (property not found) 57 */ 58 int ofnode_decode_region(ofnode node, const char *prop_name, fdt_addr_t *basep, 59 fdt_size_t *sizep); 60 61 /** 62 * ofnode_decode_memory_region()- Decode a named region within a memory bank 63 * 64 * This function handles selection of a memory region. The region is 65 * specified as an offset/size within a particular type of memory. 66 * 67 * The properties used are: 68 * 69 * <mem_type>-memory<suffix> for the name of the memory bank 70 * <mem_type>-offset<suffix> for the offset in that bank 71 * 72 * The property value must have an offset and a size. The function checks 73 * that the region is entirely within the memory bank.5 74 * 75 * @param node ofnode containing the properties (-1 for /config) 76 * @param mem_type Type of memory to use, which is a name, such as 77 * "u-boot" or "kernel". 78 * @param suffix String to append to the memory/offset 79 * property names 80 * @param basep Returns base of region 81 * @param sizep Returns size of region 82 * @return 0 if OK, -ive on error 83 */ 84 int ofnode_decode_memory_region(ofnode config_node, const char *mem_type, 85 const char *suffix, fdt_addr_t *basep, 86 fdt_size_t *sizep); 87 88 #endif 89