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/*
* Copyright (c) 2014 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.
*/
#ifndef __VPD_H__
#define __VPD_H__
#include <stdint.h>
#define GOOGLE_VPD_2_0_OFFSET 0x600
enum vpd_region {
VPD_ANY = 0,
VPD_RO = 1,
VPD_RW = 2
};
/* VPD 2.0 data blob structure */
struct vpd_blob {
bool initialized;
uint8_t *ro_base;
uint32_t ro_size;
uint8_t *rw_base;
uint32_t rw_size;
};
extern struct vpd_blob g_vpd_blob;
/*
* This function loads g_vpd_blob CAR_GLOBAL variable.
* The variable is initialized if it was not.
*/
const struct vpd_blob *vpd_load_blob(void);
/*
* This function gets the base address and size of
* buffers for RO_VPD/RW_VPD binary blobs, and sets
* the struct.
*/
void vpd_get_buffers(struct vpd_blob *blob);
/*
* Reads VPD string value by key.
*
* Reads in at most one less than size characters from VPD and stores them
* into buffer. A terminating null byte ('\0') is stored after the last
* character in the buffer.
*
* Returns NULL if key is not found, otherwise buffer.
*/
char *vpd_gets(const char *key, char *buffer, int size, enum vpd_region region);
/*
* Find VPD value by key.
*
* Searches for a VPD entry in the VPD cache. If found, places the size of the
* entry into '*size' and returns the pointer to the entry data.
*
* This function presumes that VPD is cached in DRAM (which is the case in the
* current implementation) and as such returns the pointer into the cache. The
* user is not supposed to modify the data, and does not have to free the
* memory.
*
* Returns NULL if key is not found.
*/
const void *vpd_find(const char *key, int *size, enum vpd_region region);
/*
* Find value of boolean type vpd key.
*
* During the process, necessary checking is done, such as making
* sure the value length is 1, and value is either '1' or '0'.
*/
bool vpd_get_bool(const char *key, enum vpd_region region,
uint8_t *val);
#endif /* __VPD_H__ */
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