1/* 2 * NVRAM definitions and access functions. 3 * 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. 8 */ 9 10#ifndef _ASM_POWERPC_NVRAM_H 11#define _ASM_POWERPC_NVRAM_H 12 13#define NVRW_CNT 0x20 14#define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */ 15#define NVRAM_BLOCK_LEN 16 16#define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN) 17#define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN) 18 19#define NVRAM_AS0 0x74 20#define NVRAM_AS1 0x75 21#define NVRAM_DATA 0x77 22 23 24/* RTC Offsets */ 25 26#define MOTO_RTC_SECONDS 0x1FF9 27#define MOTO_RTC_MINUTES 0x1FFA 28#define MOTO_RTC_HOURS 0x1FFB 29#define MOTO_RTC_DAY_OF_WEEK 0x1FFC 30#define MOTO_RTC_DAY_OF_MONTH 0x1FFD 31#define MOTO_RTC_MONTH 0x1FFE 32#define MOTO_RTC_YEAR 0x1FFF 33#define MOTO_RTC_CONTROLA 0x1FF8 34#define MOTO_RTC_CONTROLB 0x1FF9 35 36#define NVRAM_SIG_SP 0x02 /* support processor */ 37#define NVRAM_SIG_OF 0x50 /* open firmware config */ 38#define NVRAM_SIG_FW 0x51 /* general firmware */ 39#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */ 40#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */ 41#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */ 42#define NVRAM_SIG_SYS 0x70 /* system env vars */ 43#define NVRAM_SIG_CFG 0x71 /* config data */ 44#define NVRAM_SIG_ELOG 0x72 /* error log */ 45#define NVRAM_SIG_VEND 0x7e /* vendor defined */ 46#define NVRAM_SIG_FREE 0x7f /* Free space */ 47#define NVRAM_SIG_OS 0xa0 /* OS defined */ 48#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */ 49 50/* If change this size, then change the size of NVNAME_LEN */ 51struct nvram_header { 52 unsigned char signature; 53 unsigned char checksum; 54 unsigned short length; 55 char name[12]; 56}; 57 58#ifdef __KERNEL__ 59struct nvram_partition { 60 struct list_head partition; 61 struct nvram_header header; 62 unsigned int index; 63}; 64 65 66extern int nvram_write_error_log(char * buff, int length, unsigned int err_type); 67extern int nvram_read_error_log(char * buff, int length, unsigned int * err_type); 68extern int nvram_clear_error_log(void); 69extern struct nvram_partition *nvram_find_partition(int sig, const char *name); 70 71extern int pSeries_nvram_init(void); 72extern int mmio_nvram_init(void); 73#endif /* __KERNEL__ */ 74 75/* PowerMac specific nvram stuffs */ 76 77enum { 78 pmac_nvram_OF, /* Open Firmware partition */ 79 pmac_nvram_XPRAM, /* MacOS XPRAM partition */ 80 pmac_nvram_NR /* MacOS Name Registry partition */ 81}; 82 83#ifdef __KERNEL__ 84/* Return partition offset in nvram */ 85extern int pmac_get_partition(int partition); 86 87/* Direct access to XPRAM on PowerMacs */ 88extern u8 pmac_xpram_read(int xpaddr); 89extern void pmac_xpram_write(int xpaddr, u8 data); 90 91/* Synchronize NVRAM */ 92extern void nvram_sync(void); 93 94/* Normal access to NVRAM */ 95extern unsigned char nvram_read_byte(int i); 96extern void nvram_write_byte(unsigned char c, int i); 97#endif 98 99/* Some offsets in XPRAM */ 100#define PMAC_XPRAM_MACHINE_LOC 0xe4 101#define PMAC_XPRAM_SOUND_VOLUME 0x08 102 103/* Machine location structure in PowerMac XPRAM */ 104struct pmac_machine_location { 105 unsigned int latitude; /* 2+30 bit Fractional number */ 106 unsigned int longitude; /* 2+30 bit Fractional number */ 107 unsigned int delta; /* mix of GMT delta and DLS */ 108}; 109 110/* 111 * /dev/nvram ioctls 112 * 113 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is 114 * definitely obsolete. Do not use it if you can avoid it 115 */ 116 117#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ 118 _IOWR('p', 0x40, int) 119 120#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */ 121#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */ 122 123#endif /* _ASM_POWERPC_NVRAM_H */ 124