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/*
* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*/
#ifndef CHROMEOS_FDT_DECODE_H_
#define CHROMEOS_FDT_DECODE_H_
#include <chromeos/fmap.h>
/* Decode Chrome OS specific configuration from fdt */
int fdt_decode_twostop_fmap(const void *fdt, struct twostop_fmap *config);
/**
* This checks whether a property exists.
*
* @param fdt FDT blob to use
* @param name The path and name to the property in question
* @return non-zero if the property exists, zero if it does not exist.
*/
int fdt_decode_chromeos_config_has_prop(const void *fdt, const char *name);
/**
* Look up a property in chromeos-config which contains a memory region
* address and size. Then return a pointer to this address. if the address
* is zero, it is allocated with malloc() instead.
*
* The property must hold one address with a length. This is only tested on
* 32-bit machines.
*
* @param blob FDT blob
* @param node node to examine
* @param prop_name name of property to find
* @param size returns size of region
* @return pointer to region, or NULL if property not found/malloc failed
*/
void *fdt_decode_chromeos_alloc_region(const void *blob,
const char *prop_name, size_t *size);
/**
* Retrieve the MRC cache base address from the FMAP section of the device
* tree.
*
* @param blob FDT blob
* @param fme pointer to the return value (offset and length are
* saved in the structure)
*/
int fdt_get_mrc_cache_base(const char *blob, struct fmap_entry *fme);
#endif /* CHROMEOS_FDT_DECODE_H_ */
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