2 * NVRAM definitions and access functions.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
10 #ifndef _ASM_POWERPC_NVRAM_H
11 #define _ASM_POWERPC_NVRAM_H
13 /* Signatures for nvram partitions */
14 #define NVRAM_SIG_SP 0x02 /* support processor */
15 #define NVRAM_SIG_OF 0x50 /* open firmware config */
16 #define NVRAM_SIG_FW 0x51 /* general firmware */
17 #define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
18 #define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
19 #define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
20 #define NVRAM_SIG_SYS 0x70 /* system env vars */
21 #define NVRAM_SIG_CFG 0x71 /* config data */
22 #define NVRAM_SIG_ELOG 0x72 /* error log */
23 #define NVRAM_SIG_VEND 0x7e /* vendor defined */
24 #define NVRAM_SIG_FREE 0x7f /* Free space */
25 #define NVRAM_SIG_OS 0xa0 /* OS defined */
26 #define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
30 #include <linux/errno.h>
31 #include <linux/list.h>
33 #ifdef CONFIG_PPC_PSERIES
34 extern int nvram_write_error_log(char * buff
, int length
,
35 unsigned int err_type
, unsigned int err_seq
);
36 extern int nvram_read_error_log(char * buff
, int length
,
37 unsigned int * err_type
, unsigned int *err_seq
);
38 extern int nvram_clear_error_log(void);
39 extern int pSeries_nvram_init(void);
40 #endif /* CONFIG_PPC_PSERIES */
42 #ifdef CONFIG_MMIO_NVRAM
43 extern int mmio_nvram_init(void);
45 static inline int mmio_nvram_init(void)
51 extern int __init
nvram_scan_partitions(void);
52 extern loff_t
nvram_create_partition(const char *name
, int sig
,
53 int req_size
, int min_size
);
54 extern int nvram_remove_partition(const char *name
, int sig
);
55 extern int nvram_get_partition_size(loff_t data_index
);
56 extern loff_t
nvram_find_partition(const char *name
, int sig
, int *out_size
);
58 #endif /* __KERNEL__ */
60 /* PowerMac specific nvram stuffs */
63 pmac_nvram_OF
, /* Open Firmware partition */
64 pmac_nvram_XPRAM
, /* MacOS XPRAM partition */
65 pmac_nvram_NR
/* MacOS Name Registry partition */
69 /* Return partition offset in nvram */
70 extern int pmac_get_partition(int partition
);
72 /* Direct access to XPRAM on PowerMacs */
73 extern u8
pmac_xpram_read(int xpaddr
);
74 extern void pmac_xpram_write(int xpaddr
, u8 data
);
76 /* Synchronize NVRAM */
77 extern void nvram_sync(void);
79 /* Determine NVRAM size */
80 extern ssize_t
nvram_get_size(void);
82 /* Normal access to NVRAM */
83 extern unsigned char nvram_read_byte(int i
);
84 extern void nvram_write_byte(unsigned char c
, int i
);
87 /* Some offsets in XPRAM */
88 #define PMAC_XPRAM_MACHINE_LOC 0xe4
89 #define PMAC_XPRAM_SOUND_VOLUME 0x08
91 /* Machine location structure in PowerMac XPRAM */
92 struct pmac_machine_location
{
93 unsigned int latitude
; /* 2+30 bit Fractional number */
94 unsigned int longitude
; /* 2+30 bit Fractional number */
95 unsigned int delta
; /* mix of GMT delta and DLS */
101 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
102 * definitely obsolete. Do not use it if you can avoid it
105 #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
106 _IOWR('p', 0x40, int)
108 #define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
109 #define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
111 #endif /* _ASM_POWERPC_NVRAM_H */