1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * NVRAM definitions and access functions. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or 6*4882a593Smuzhiyun * modify it under the terms of the GNU General Public License 7*4882a593Smuzhiyun * as published by the Free Software Foundation; either version 8*4882a593Smuzhiyun * 2 of the License, or (at your option) any later version. 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #ifndef _UAPI_ASM_POWERPC_NVRAM_H 12*4882a593Smuzhiyun #define _UAPI_ASM_POWERPC_NVRAM_H 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun /* Signatures for nvram partitions */ 15*4882a593Smuzhiyun #define NVRAM_SIG_SP 0x02 /* support processor */ 16*4882a593Smuzhiyun #define NVRAM_SIG_OF 0x50 /* open firmware config */ 17*4882a593Smuzhiyun #define NVRAM_SIG_FW 0x51 /* general firmware */ 18*4882a593Smuzhiyun #define NVRAM_SIG_HW 0x52 /* hardware (VPD) */ 19*4882a593Smuzhiyun #define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */ 20*4882a593Smuzhiyun #define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */ 21*4882a593Smuzhiyun #define NVRAM_SIG_SYS 0x70 /* system env vars */ 22*4882a593Smuzhiyun #define NVRAM_SIG_CFG 0x71 /* config data */ 23*4882a593Smuzhiyun #define NVRAM_SIG_ELOG 0x72 /* error log */ 24*4882a593Smuzhiyun #define NVRAM_SIG_VEND 0x7e /* vendor defined */ 25*4882a593Smuzhiyun #define NVRAM_SIG_FREE 0x7f /* Free space */ 26*4882a593Smuzhiyun #define NVRAM_SIG_OS 0xa0 /* OS defined */ 27*4882a593Smuzhiyun #define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun /* PowerMac specific nvram stuffs */ 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun enum { 33*4882a593Smuzhiyun pmac_nvram_OF, /* Open Firmware partition */ 34*4882a593Smuzhiyun pmac_nvram_XPRAM, /* MacOS XPRAM partition */ 35*4882a593Smuzhiyun pmac_nvram_NR /* MacOS Name Registry partition */ 36*4882a593Smuzhiyun }; 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun /* Some offsets in XPRAM */ 40*4882a593Smuzhiyun #define PMAC_XPRAM_MACHINE_LOC 0xe4 41*4882a593Smuzhiyun #define PMAC_XPRAM_SOUND_VOLUME 0x08 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun /* Machine location structure in PowerMac XPRAM */ 44*4882a593Smuzhiyun struct pmac_machine_location { 45*4882a593Smuzhiyun unsigned int latitude; /* 2+30 bit Fractional number */ 46*4882a593Smuzhiyun unsigned int longitude; /* 2+30 bit Fractional number */ 47*4882a593Smuzhiyun unsigned int delta; /* mix of GMT delta and DLS */ 48*4882a593Smuzhiyun }; 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun /* 51*4882a593Smuzhiyun * /dev/nvram ioctls 52*4882a593Smuzhiyun * 53*4882a593Smuzhiyun * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is 54*4882a593Smuzhiyun * definitely obsolete. Do not use it if you can avoid it 55*4882a593Smuzhiyun */ 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \ 58*4882a593Smuzhiyun _IOWR('p', 0x40, int) 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun #define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */ 61*4882a593Smuzhiyun #define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */ 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun #endif /* _UAPI_ASM_POWERPC_NVRAM_H */ 64