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 extern int nvram_write_error_log(char * buff, int length,
34 unsigned int err_type, unsigned int err_seq);
35 extern int nvram_read_error_log(char * buff, int length,
36 unsigned int * err_type, unsigned int *err_seq);
37 extern int nvram_clear_error_log(void);
39 extern int pSeries_nvram_init(void);
41 #ifdef CONFIG_MMIO_NVRAM
42 extern int mmio_nvram_init(void);
44 static inline int mmio_nvram_init(void)
50 #endif /* __KERNEL__ */
52 /* PowerMac specific nvram stuffs */
55 pmac_nvram_OF, /* Open Firmware partition */
56 pmac_nvram_XPRAM, /* MacOS XPRAM partition */
57 pmac_nvram_NR /* MacOS Name Registry partition */
61 /* Return partition offset in nvram */
62 extern int pmac_get_partition(int partition);
64 /* Direct access to XPRAM on PowerMacs */
65 extern u8 pmac_xpram_read(int xpaddr);
66 extern void pmac_xpram_write(int xpaddr, u8 data);
68 /* Synchronize NVRAM */
69 extern void nvram_sync(void);
71 /* Determine NVRAM size */
72 extern ssize_t nvram_get_size(void);
74 /* Normal access to NVRAM */
75 extern unsigned char nvram_read_byte(int i);
76 extern void nvram_write_byte(unsigned char c, int i);
79 /* Some offsets in XPRAM */
80 #define PMAC_XPRAM_MACHINE_LOC 0xe4
81 #define PMAC_XPRAM_SOUND_VOLUME 0x08
83 /* Machine location structure in PowerMac XPRAM */
84 struct pmac_machine_location {
85 unsigned int latitude; /* 2+30 bit Fractional number */
86 unsigned int longitude; /* 2+30 bit Fractional number */
87 unsigned int delta; /* mix of GMT delta and DLS */
93 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
94 * definitely obsolete. Do not use it if you can avoid it
97 #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
100 #define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
101 #define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
103 #endif /* _ASM_POWERPC_NVRAM_H */