2 * PreP compliant NVRAM access
3 * This needs to be updated for PPC64
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
11 #ifndef _PPC64_NVRAM_H
12 #define _PPC64_NVRAM_H
15 #define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */
16 #define NVRAM_BLOCK_LEN 16
17 #define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN)
18 #define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN)
20 #define NVRAM_AS0 0x74
21 #define NVRAM_AS1 0x75
22 #define NVRAM_DATA 0x77
27 #define MOTO_RTC_SECONDS 0x1FF9
28 #define MOTO_RTC_MINUTES 0x1FFA
29 #define MOTO_RTC_HOURS 0x1FFB
30 #define MOTO_RTC_DAY_OF_WEEK 0x1FFC
31 #define MOTO_RTC_DAY_OF_MONTH 0x1FFD
32 #define MOTO_RTC_MONTH 0x1FFE
33 #define MOTO_RTC_YEAR 0x1FFF
34 #define MOTO_RTC_CONTROLA 0x1FF8
35 #define MOTO_RTC_CONTROLB 0x1FF9
38 #define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
42 #define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
45 #define NVRAM_SIG_SP 0x02 /* support processor */
46 #define NVRAM_SIG_OF 0x50 /* open firmware config */
47 #define NVRAM_SIG_FW 0x51 /* general firmware */
48 #define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
49 #define NVRAM_SIG_SYS 0x70 /* system env vars */
50 #define NVRAM_SIG_CFG 0x71 /* config data */
51 #define NVRAM_SIG_ELOG 0x72 /* error log */
52 #define NVRAM_SIG_VEND 0x7e /* vendor defined */
53 #define NVRAM_SIG_FREE 0x7f /* Free space */
54 #define NVRAM_SIG_OS 0xa0 /* OS defined */
56 /* If change this size, then change the size of NVRAM_HEADER_LEN */
58 unsigned char signature;
59 unsigned char checksum;
60 unsigned short length;
64 struct nvram_partition {
65 struct list_head partition;
66 struct nvram_header header;
71 ssize_t read_nvram(char *buf, size_t count, loff_t *index);
72 ssize_t write_nvram(char *buf, size_t count, loff_t *index);
73 int write_error_log_nvram(char * buff, int length, unsigned int err_type);
74 int read_error_log_nvram(char * buff, int length, unsigned int * err_type);
75 int clear_error_log_nvram(void);
76 void print_nvram_partitions(char * label);
78 #endif /* _PPC64_NVRAM_H */