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964cadc445
Add a way to decode a memory region, including the memory type (sram or sdram) and its start address and size. Signed-off-by: Simon Glass <sjg@chromium.org>
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2017 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef _DM_OF_EXTRA_H
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#define _DM_OF_EXTRA_H
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#include <dm/ofnode.h>
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enum fmap_compress_t {
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FMAP_COMPRESS_NONE,
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FMAP_COMPRESS_LZO,
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};
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enum fmap_hash_t {
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FMAP_HASH_NONE,
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FMAP_HASH_SHA1,
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FMAP_HASH_SHA256,
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};
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/* A flash map entry, containing an offset and length */
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struct fmap_entry {
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uint32_t offset;
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uint32_t length;
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uint32_t used; /* Number of bytes used in region */
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enum fmap_compress_t compress_algo; /* Compression type */
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enum fmap_hash_t hash_algo; /* Hash algorithm */
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const uint8_t *hash; /* Hash value */
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int hash_size; /* Hash size */
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};
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/**
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* Read a flash entry from the fdt
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*
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* @param node Reference to node to read
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* @param entry Place to put offset and size of this node
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* @return 0 if ok, -ve on error
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*/
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int ofnode_read_fmap_entry(ofnode node, struct fmap_entry *entry);
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/**
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* ofnode_decode_region() - Decode a memory region from a node
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*
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* Look up a property in a node which contains a memory region address and
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* size. Then return a pointer to this address.
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*
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* The property must hold one address with a length. This is only tested on
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* 32-bit machines.
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*
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* @param node ofnode to examine
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* @param prop_name name of property to find
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* @param basep Returns base address of region
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* @param size Returns size of region
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* @return 0 if ok, -1 on error (property not found)
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*/
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int ofnode_decode_region(ofnode node, const char *prop_name, fdt_addr_t *basep,
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fdt_size_t *sizep);
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/**
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* ofnode_decode_memory_region()- Decode a named region within a memory bank
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*
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* This function handles selection of a memory region. The region is
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* specified as an offset/size within a particular type of memory.
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*
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* The properties used are:
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*
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* <mem_type>-memory<suffix> for the name of the memory bank
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* <mem_type>-offset<suffix> for the offset in that bank
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*
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* The property value must have an offset and a size. The function checks
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* that the region is entirely within the memory bank.5
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*
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* @param node ofnode containing the properties (-1 for /config)
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* @param mem_type Type of memory to use, which is a name, such as
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* "u-boot" or "kernel".
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* @param suffix String to append to the memory/offset
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* property names
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* @param basep Returns base of region
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* @param sizep Returns size of region
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* @return 0 if OK, -ive on error
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*/
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int ofnode_decode_memory_region(ofnode config_node, const char *mem_type,
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const char *suffix, fdt_addr_t *basep,
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fdt_size_t *sizep);
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#endif
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