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 _UAPI_ASM_POWERPC_NVRAM_H 11#define _UAPI_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 29/* PowerMac specific nvram stuffs */ 30 31enum { 32 pmac_nvram_OF, /* Open Firmware partition */ 33 pmac_nvram_XPRAM, /* MacOS XPRAM partition */ 34 pmac_nvram_NR /* MacOS Name Registry partition */ 35}; 36 37 38/* Some offsets in XPRAM */ 39#define PMAC_XPRAM_MACHINE_LOC 0xe4 40#define PMAC_XPRAM_SOUND_VOLUME 0x08 41 42/* Machine location structure in PowerMac XPRAM */ 43struct pmac_machine_location { 44 unsigned int latitude; /* 2+30 bit Fractional number */ 45 unsigned int longitude; /* 2+30 bit Fractional number */ 46 unsigned int delta; /* mix of GMT delta and DLS */ 47}; 48 49/* 50 * /dev/nvram ioctls 51 * 52 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is 53 * definitely obsolete. Do not use it if you can avoid it 54 */ 55 56#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ 57 _IOWR('p', 0x40, int) 58 59#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */ 60#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */ 61 62#endif /* _UAPI_ASM_POWERPC_NVRAM_H */ 63