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+/*
+ * Copyright 2010, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * 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 FLASHMAP_LIB_FMAP_H__
+#define FLASHMAP_LIB_FMAP_H__
+
+#include <inttypes.h>
+
+#include <valstr.h>
+
+#define FMAP_SIGNATURE "__FMAP__"
+#define FMAP_VER_MAJOR 1 /* this header's FMAP minor version */
+#define FMAP_VER_MINOR 1 /* this header's FMAP minor version */
+#define FMAP_STRLEN 32 /* maximum length for strings, */
+ /* including null-terminator */
+extern const struct valstr flag_lut[16];
+enum fmap_flags {
+ FMAP_AREA_STATIC = 1 << 0,
+ FMAP_AREA_COMPRESSED = 1 << 1,
+ FMAP_AREA_RO = 1 << 2,
+};
+
+/* Mapping of volatile and static regions in firmware binary */
+struct fmap_area {
+ uint32_t offset; /* offset relative to base */
+ uint32_t size; /* size in bytes */
+ uint8_t name[FMAP_STRLEN]; /* descriptive name */
+ uint16_t flags; /* flags for this area */
+} __attribute__((packed));
+
+struct fmap {
+ uint8_t signature[8]; /* "__FMAP__" (0x5F5F464D41505F5F) */
+ uint8_t ver_major; /* major version */
+ uint8_t ver_minor; /* minor version */
+ uint64_t base; /* address of the firmware binary */
+ uint32_t size; /* size of firmware binary in bytes */
+ uint8_t name[FMAP_STRLEN]; /* name of this firmware binary */
+ uint16_t nareas; /* number of areas described by
+ fmap_areas[] below */
+ struct fmap_area areas[];
+} __attribute__((packed));
+
+/*
+ * fmap_find - find FMAP signature in a binary image
+ *
+ * @image: binary image
+ * @len: length of binary image
+ *
+ * This function does no error checking. The caller is responsible for
+ * verifying that the contents are sane.
+ *
+ * returns offset of FMAP signature to indicate success
+ * returns <0 to indicate failure
+ */
+extern long int fmap_find(const uint8_t *image, unsigned int len);
+
+/*
+ * fmap_print - Print contents of flash map data structure
+ *
+ * @map: raw map data
+ *
+ * returns 0 to indiciate success
+ * returns <0 to indicate failure
+ */
+extern int fmap_print(const struct fmap *map);
+
+/*
+ * fmap_get_csum - get the checksum of static regions of an image
+ *
+ * @image: image to checksum
+ * @len: length of image
+ * @digest: double-pointer to store location of first byte of digest
+ *
+ * fmap_get_csum() will reset, write, and finalize the digest.
+ * The location of the final digest will start at the location pointed to
+ * by digest, which will be allocated and must be freed by the caller.
+ *
+ * returns digest length if successful
+ * returns <0 to indicate error
+ */
+extern int fmap_get_csum(const uint8_t *image,
+ unsigned int image_len, uint8_t **digest);
+
+
+/*
+ * fmap_flags_to_string - convert raw flags field into user-friendly string
+ *
+ * @flags: raw flags
+ *
+ * This function returns a user-friendly comma-separated list of fmap area
+ * flags. If there are no flags (flags == 0), the string will contain only
+ * a terminating character ('\0')
+ *
+ * This function allocates memory which the caller must free.
+ *
+ * returns pointer to an allocated string if successful
+ * returns NULL to indicate failure
+ */
+char *fmap_flags_to_string(uint16_t flags);
+
+/*
+ * fmap_create - allocate and initialize a new fmap structure
+ *
+ * @base: base address of firmware within address space
+ * @size: size of the firmware (bytes)
+ * @name: name of firmware
+ *
+ * This function will allocate a flashmap header. Members of the structure
+ * which are not passed in are automatically initialized.
+ *
+ * returns pointer to newly allocated flashmap header if successful
+ * returns NULL to indicate failure
+ */
+extern struct fmap *fmap_create(uint64_t base,
+ uint32_t size, uint8_t *name);
+
+/* free memory used by an fmap structure */
+extern void fmap_destroy(struct fmap *fmap);
+
+/*
+ * fmap_size - returns size of fmap data structure (including areas)
+ *
+ * @fmap: fmap
+ *
+ * returns size of fmap structure if successful
+ * returns <0 to indicate failure
+ */
+extern int fmap_size(struct fmap *fmap);
+
+/*
+ * fmap_append_area - realloc an existing flashmap and append an area
+ *
+ * @fmap: double pointer to existing flashmap
+ * @offset: offset of area
+ * @size: size of area
+ * @name: name of area
+ * @flags: area flags
+ *
+ * returns total size of reallocated flashmap structure if successful
+ * returns <0 to indicate failure
+ */
+extern int fmap_append_area(struct fmap **fmap,
+ uint32_t offset, uint32_t size,
+ const uint8_t *name, uint16_t flags);
+
+/*
+ * fmap_find_area - find an fmap_area entry (by name) and return pointer to it
+ *
+ * @fmap: fmap structure to parse
+ * @name: name of area to find
+ *
+ * returns a pointer to the entry in the fmap structure if successful
+ * returns NULL to indicate failure or if no matching area entry is found
+ */
+extern struct fmap_area *fmap_find_area(struct fmap *fmap, const char *name);
+
+/* unit testing stuff */
+extern int fmap_test();
+
+#endif /* FLASHMAP_LIB_FMAP_H__*/