blob: 9d1aafe607c7996b98d2309e74d73ffef432be3a [file] [log] [blame]
* NVRAM definitions and access functions.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
/* Signatures for nvram partitions */
#define NVRAM_SIG_SP 0x02 /* support processor */
#define NVRAM_SIG_OF 0x50 /* open firmware config */
#define NVRAM_SIG_FW 0x51 /* general firmware */
#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
#define NVRAM_SIG_SYS 0x70 /* system env vars */
#define NVRAM_SIG_CFG 0x71 /* config data */
#define NVRAM_SIG_ELOG 0x72 /* error log */
#define NVRAM_SIG_VEND 0x7e /* vendor defined */
#define NVRAM_SIG_FREE 0x7f /* Free space */
#define NVRAM_SIG_OS 0xa0 /* OS defined */
#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
#ifdef __KERNEL__
#include <linux/errno.h>
#include <linux/list.h>
extern int nvram_write_error_log(char * buff, int length,
unsigned int err_type, unsigned int err_seq);
extern int nvram_read_error_log(char * buff, int length,
unsigned int * err_type, unsigned int *err_seq);
extern int nvram_clear_error_log(void);
extern int pSeries_nvram_init(void);
extern int mmio_nvram_init(void);
static inline int mmio_nvram_init(void)
return -ENODEV;
extern int __init nvram_scan_partitions(void);
extern loff_t nvram_create_partition(const char *name, int sig,
int req_size, int min_size);
extern int nvram_remove_partition(const char *name, int sig,
const char *exceptions[]);
extern int nvram_get_partition_size(loff_t data_index);
extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
#endif /* __KERNEL__ */
/* PowerMac specific nvram stuffs */
enum {
pmac_nvram_OF, /* Open Firmware partition */
pmac_nvram_XPRAM, /* MacOS XPRAM partition */
pmac_nvram_NR /* MacOS Name Registry partition */
#ifdef __KERNEL__
/* Return partition offset in nvram */
extern int pmac_get_partition(int partition);
/* Direct access to XPRAM on PowerMacs */
extern u8 pmac_xpram_read(int xpaddr);
extern void pmac_xpram_write(int xpaddr, u8 data);
/* Synchronize NVRAM */
extern void nvram_sync(void);
/* Determine NVRAM size */
extern ssize_t nvram_get_size(void);
/* Normal access to NVRAM */
extern unsigned char nvram_read_byte(int i);
extern void nvram_write_byte(unsigned char c, int i);
/* Some offsets in XPRAM */
/* Machine location structure in PowerMac XPRAM */
struct pmac_machine_location {
unsigned int latitude; /* 2+30 bit Fractional number */
unsigned int longitude; /* 2+30 bit Fractional number */
unsigned int delta; /* mix of GMT delta and DLS */
* /dev/nvram ioctls
* Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
* definitely obsolete. Do not use it if you can avoid it
_IOWR('p', 0x40, int)
#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
#endif /* _ASM_POWERPC_NVRAM_H */