diff options
Diffstat (limited to 'include/asm-ppc/nvram.h')
| -rw-r--r-- | include/asm-ppc/nvram.h | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/include/asm-ppc/nvram.h b/include/asm-ppc/nvram.h index d65bb55baf9d..31ef16e3fc4f 100644 --- a/include/asm-ppc/nvram.h +++ b/include/asm-ppc/nvram.h @@ -34,23 +34,40 @@ enum { /* Return partition offset in nvram */ extern int pmac_get_partition(int partition); -/* Direct access to XPRAM */ +/* 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); + +/* 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 */ #define PMAC_XPRAM_MACHINE_LOC 0xe4 #define PMAC_XPRAM_SOUND_VOLUME 0x08 -/* Machine location structure 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 */ -#define PMAC_NVRAM_GET_OFFSET _IOWR('p', 0x40, int) /* Get NVRAM partition offset */ +/* + * /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 + */ + +#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ + _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 #endif /* __KERNEL__ */ |