mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
3.0 KiB
113 lines
3.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef __LINUX_BCM963XX_NVRAM_H__ |
|
#define __LINUX_BCM963XX_NVRAM_H__ |
|
|
|
#include <linux/crc32.h> |
|
#include <linux/if_ether.h> |
|
#include <linux/sizes.h> |
|
#include <linux/types.h> |
|
|
|
/* |
|
* Broadcom BCM963xx SoC board nvram data structure. |
|
* |
|
* The nvram structure varies in size depending on the SoC board version. Use |
|
* the appropriate minimum BCM963XX_NVRAM_*_SIZE define for the information |
|
* you need instead of sizeof(struct bcm963xx_nvram) as this may change. |
|
*/ |
|
|
|
#define BCM963XX_NVRAM_V4_SIZE 300 |
|
#define BCM963XX_NVRAM_V5_SIZE (1 * SZ_1K) |
|
|
|
#define BCM963XX_DEFAULT_PSI_SIZE 64 |
|
|
|
enum bcm963xx_nvram_nand_part { |
|
BCM963XX_NVRAM_NAND_PART_BOOT = 0, |
|
BCM963XX_NVRAM_NAND_PART_ROOTFS_1, |
|
BCM963XX_NVRAM_NAND_PART_ROOTFS_2, |
|
BCM963XX_NVRAM_NAND_PART_DATA, |
|
BCM963XX_NVRAM_NAND_PART_BBT, |
|
|
|
__BCM963XX_NVRAM_NAND_NR_PARTS |
|
}; |
|
|
|
struct bcm963xx_nvram { |
|
u32 version; |
|
char bootline[256]; |
|
char name[16]; |
|
u32 main_tp_number; |
|
u32 psi_size; |
|
u32 mac_addr_count; |
|
u8 mac_addr_base[ETH_ALEN]; |
|
u8 __reserved1[2]; |
|
u32 checksum_v4; |
|
|
|
u8 __reserved2[292]; |
|
u32 nand_part_offset[__BCM963XX_NVRAM_NAND_NR_PARTS]; |
|
u32 nand_part_size[__BCM963XX_NVRAM_NAND_NR_PARTS]; |
|
u8 __reserved3[388]; |
|
u32 checksum_v5; |
|
}; |
|
|
|
#define BCM963XX_NVRAM_NAND_PART_OFFSET(nvram, part) \ |
|
bcm963xx_nvram_nand_part_offset(nvram, BCM963XX_NVRAM_NAND_PART_ ##part) |
|
|
|
static inline u64 __pure bcm963xx_nvram_nand_part_offset( |
|
const struct bcm963xx_nvram *nvram, |
|
enum bcm963xx_nvram_nand_part part) |
|
{ |
|
return nvram->nand_part_offset[part] * SZ_1K; |
|
} |
|
|
|
#define BCM963XX_NVRAM_NAND_PART_SIZE(nvram, part) \ |
|
bcm963xx_nvram_nand_part_size(nvram, BCM963XX_NVRAM_NAND_PART_ ##part) |
|
|
|
static inline u64 __pure bcm963xx_nvram_nand_part_size( |
|
const struct bcm963xx_nvram *nvram, |
|
enum bcm963xx_nvram_nand_part part) |
|
{ |
|
return nvram->nand_part_size[part] * SZ_1K; |
|
} |
|
|
|
/* |
|
* bcm963xx_nvram_checksum - Verify nvram checksum |
|
* |
|
* @nvram: pointer to full size nvram data structure |
|
* @expected_out: optional pointer to store expected checksum value |
|
* @actual_out: optional pointer to store actual checksum value |
|
* |
|
* Return: 0 if the checksum is valid, otherwise -EINVAL |
|
*/ |
|
static int __maybe_unused bcm963xx_nvram_checksum( |
|
const struct bcm963xx_nvram *nvram, |
|
u32 *expected_out, u32 *actual_out) |
|
{ |
|
u32 expected, actual; |
|
size_t len; |
|
|
|
if (nvram->version <= 4) { |
|
expected = nvram->checksum_v4; |
|
len = BCM963XX_NVRAM_V4_SIZE - sizeof(u32); |
|
} else { |
|
expected = nvram->checksum_v5; |
|
len = BCM963XX_NVRAM_V5_SIZE - sizeof(u32); |
|
} |
|
|
|
/* |
|
* Calculate the CRC32 value for the nvram with a checksum value |
|
* of 0 without modifying or copying the nvram by combining: |
|
* - The CRC32 of the nvram without the checksum value |
|
* - The CRC32 of a zero checksum value (which is also 0) |
|
*/ |
|
actual = crc32_le_combine( |
|
crc32_le(~0, (u8 *)nvram, len), 0, sizeof(u32)); |
|
|
|
if (expected_out) |
|
*expected_out = expected; |
|
|
|
if (actual_out) |
|
*actual_out = actual; |
|
|
|
return expected == actual ? 0 : -EINVAL; |
|
}; |
|
|
|
#endif /* __LINUX_BCM963XX_NVRAM_H__ */
|
|
|