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 /* 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" */ 27 28 #ifdef __KERNEL__ 29 30 #include <linux/errno.h> 31 #include <linux/list.h> 32 33 #ifdef CONFIG_PPC_PSERIES 34 extern int nvram_write_error_log(char * buff, int length, 35 unsigned int err_type, unsigned int err_seq); 36 extern int nvram_read_error_log(char * buff, int length, 37 unsigned int * err_type, unsigned int *err_seq); 38 extern int nvram_clear_error_log(void); 39 extern int pSeries_nvram_init(void); 40 #endif /* CONFIG_PPC_PSERIES */ 41 42 #ifdef CONFIG_MMIO_NVRAM 43 extern int mmio_nvram_init(void); 44 #else 45 static inline int mmio_nvram_init(void) 46 { 47 return -ENODEV; 48 } 49 #endif 50 51 extern int __init nvram_scan_partitions(void); 52 extern loff_t nvram_create_partition(const char *name, int sig, 53 int req_size, int min_size); 54 extern int nvram_remove_partition(const char *name, int sig); 55 extern int nvram_get_partition_size(loff_t data_index); 56 extern loff_t nvram_find_partition(const char *name, int sig, int *out_size); 57 58 #endif /* __KERNEL__ */ 59 60 /* PowerMac specific nvram stuffs */ 61 62 enum { 63 pmac_nvram_OF, /* Open Firmware partition */ 64 pmac_nvram_XPRAM, /* MacOS XPRAM partition */ 65 pmac_nvram_NR /* MacOS Name Registry partition */ 66 }; 67 68 #ifdef __KERNEL__ 69 /* Return partition offset in nvram */ 70 extern int pmac_get_partition(int partition); 71 72 /* Direct access to XPRAM on PowerMacs */ 73 extern u8 pmac_xpram_read(int xpaddr); 74 extern void pmac_xpram_write(int xpaddr, u8 data); 75 76 /* Synchronize NVRAM */ 77 extern void nvram_sync(void); 78 79 /* Determine NVRAM size */ 80 extern ssize_t nvram_get_size(void); 81 82 /* Normal access to NVRAM */ 83 extern unsigned char nvram_read_byte(int i); 84 extern void nvram_write_byte(unsigned char c, int i); 85 #endif 86 87 /* Some offsets in XPRAM */ 88 #define PMAC_XPRAM_MACHINE_LOC 0xe4 89 #define PMAC_XPRAM_SOUND_VOLUME 0x08 90 91 /* Machine location structure in PowerMac XPRAM */ 92 struct pmac_machine_location { 93 unsigned int latitude; /* 2+30 bit Fractional number */ 94 unsigned int longitude; /* 2+30 bit Fractional number */ 95 unsigned int delta; /* mix of GMT delta and DLS */ 96 }; 97 98 /* 99 * /dev/nvram ioctls 100 * 101 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is 102 * definitely obsolete. Do not use it if you can avoid it 103 */ 104 105 #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ 106 _IOWR('p', 0x40, int) 107 108 #define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */ 109 #define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */ 110 111 #endif /* _ASM_POWERPC_NVRAM_H */ 112