| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * PreP compliant NVRAM access |
| 3 | */ |
| 4 | |
| 5 | #ifdef __KERNEL__ |
| 6 | #ifndef _PPC_NVRAM_H |
| 7 | #define _PPC_NVRAM_H |
| 8 | |
| 9 | #define NVRAM_AS0 0x74 |
| 10 | #define NVRAM_AS1 0x75 |
| 11 | #define NVRAM_DATA 0x77 |
| 12 | |
| 13 | |
| 14 | /* RTC Offsets */ |
| 15 | |
| 16 | #define MOTO_RTC_SECONDS 0x1FF9 |
| 17 | #define MOTO_RTC_MINUTES 0x1FFA |
| 18 | #define MOTO_RTC_HOURS 0x1FFB |
| 19 | #define MOTO_RTC_DAY_OF_WEEK 0x1FFC |
| 20 | #define MOTO_RTC_DAY_OF_MONTH 0x1FFD |
| 21 | #define MOTO_RTC_MONTH 0x1FFE |
| 22 | #define MOTO_RTC_YEAR 0x1FFF |
| 23 | #define MOTO_RTC_CONTROLA 0x1FF8 |
| 24 | #define MOTO_RTC_CONTROLB 0x1FF9 |
| 25 | |
| 26 | /* PowerMac specific nvram stuffs */ |
| 27 | |
| 28 | enum { |
| 29 | pmac_nvram_OF, /* Open Firmware partition */ |
| 30 | pmac_nvram_XPRAM, /* MacOS XPRAM partition */ |
| 31 | pmac_nvram_NR /* MacOS Name Registry partition */ |
| 32 | }; |
| 33 | |
| 34 | /* Return partition offset in nvram */ |
| 35 | extern int pmac_get_partition(int partition); |
| 36 | |
| 37 | /* Direct access to XPRAM on PowerMacs */ |
| 38 | extern u8 pmac_xpram_read(int xpaddr); |
| 39 | extern void pmac_xpram_write(int xpaddr, u8 data); |
| 40 | |
| 41 | /* Synchronize NVRAM */ |
| 42 | extern void nvram_sync(void); |
| 43 | |
| 44 | /* Normal access to NVRAM */ |
| 45 | extern unsigned char nvram_read_byte(int i); |
| 46 | extern void nvram_write_byte(unsigned char c, int i); |
| 47 | |
| 48 | /* Some offsets in XPRAM */ |
| 49 | #define PMAC_XPRAM_MACHINE_LOC 0xe4 |
| 50 | #define PMAC_XPRAM_SOUND_VOLUME 0x08 |
| 51 | |
| 52 | /* Machine location structure in PowerMac XPRAM */ |
| 53 | struct pmac_machine_location { |
| 54 | unsigned int latitude; /* 2+30 bit Fractional number */ |
| 55 | unsigned int longitude; /* 2+30 bit Fractional number */ |
| 56 | unsigned int delta; /* mix of GMT delta and DLS */ |
| 57 | }; |
| 58 | |
| 59 | /* |
| 60 | * /dev/nvram ioctls |
| 61 | * |
| 62 | * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is |
| 63 | * definitely obsolete. Do not use it if you can avoid it |
| 64 | */ |
| 65 | |
| 66 | #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ |
| 67 | _IOWR('p', 0x40, int) |
| 68 | |
| 69 | #define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */ |
| 70 | #define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */ |
| 71 | |
| 72 | #endif |
| 73 | #endif /* __KERNEL__ */ |