| /* |
| * 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__ |
| |
| #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__ */ |