5f5b4e669a
The firmware provides the location and size of the nvram in the device tree, so it does not really contain any hardware specific bits and could be used on other machines as well. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/*
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* PreP compliant NVRAM access
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* This needs to be updated for PPC64
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _PPC64_NVRAM_H
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#define _PPC64_NVRAM_H
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#define NVRW_CNT 0x20
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#define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */
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#define NVRAM_BLOCK_LEN 16
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#define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN)
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#define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN)
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#define NVRAM_AS0 0x74
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#define NVRAM_AS1 0x75
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#define NVRAM_DATA 0x77
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/* RTC Offsets */
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#define MOTO_RTC_SECONDS 0x1FF9
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#define MOTO_RTC_MINUTES 0x1FFA
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#define MOTO_RTC_HOURS 0x1FFB
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#define MOTO_RTC_DAY_OF_WEEK 0x1FFC
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#define MOTO_RTC_DAY_OF_MONTH 0x1FFD
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#define MOTO_RTC_MONTH 0x1FFE
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#define MOTO_RTC_YEAR 0x1FFF
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#define MOTO_RTC_CONTROLA 0x1FF8
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#define MOTO_RTC_CONTROLB 0x1FF9
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#define NVRAM_SIG_SP 0x02 /* support processor */
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#define NVRAM_SIG_OF 0x50 /* open firmware config */
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#define NVRAM_SIG_FW 0x51 /* general firmware */
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#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
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#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
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#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
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#define NVRAM_SIG_SYS 0x70 /* system env vars */
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#define NVRAM_SIG_CFG 0x71 /* config data */
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#define NVRAM_SIG_ELOG 0x72 /* error log */
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#define NVRAM_SIG_VEND 0x7e /* vendor defined */
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#define NVRAM_SIG_FREE 0x7f /* Free space */
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#define NVRAM_SIG_OS 0xa0 /* OS defined */
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#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
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/* If change this size, then change the size of NVNAME_LEN */
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struct nvram_header {
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unsigned char signature;
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unsigned char checksum;
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unsigned short length;
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char name[12];
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};
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struct nvram_partition {
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struct list_head partition;
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struct nvram_header header;
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unsigned int index;
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};
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extern int nvram_write_error_log(char * buff, int length, unsigned int err_type);
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extern int nvram_read_error_log(char * buff, int length, unsigned int * err_type);
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extern int nvram_clear_error_log(void);
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extern struct nvram_partition *nvram_find_partition(int sig, const char *name);
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extern int pSeries_nvram_init(void);
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extern int pmac_nvram_init(void);
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extern int bpa_nvram_init(void);
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/* PowerMac specific nvram stuffs */
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enum {
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pmac_nvram_OF, /* Open Firmware partition */
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pmac_nvram_XPRAM, /* MacOS XPRAM partition */
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pmac_nvram_NR /* MacOS Name Registry partition */
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};
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/* Return partition offset in nvram */
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extern int pmac_get_partition(int partition);
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/* Direct access to XPRAM on PowerMacs */
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extern u8 pmac_xpram_read(int xpaddr);
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extern void pmac_xpram_write(int xpaddr, u8 data);
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/* Synchronize NVRAM */
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extern int nvram_sync(void);
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/* Some offsets in XPRAM */
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#define PMAC_XPRAM_MACHINE_LOC 0xe4
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#define PMAC_XPRAM_SOUND_VOLUME 0x08
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/* Machine location structure in PowerMac XPRAM */
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struct pmac_machine_location {
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unsigned int latitude; /* 2+30 bit Fractional number */
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unsigned int longitude; /* 2+30 bit Fractional number */
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unsigned int delta; /* mix of GMT delta and DLS */
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};
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/*
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* /dev/nvram ioctls
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*
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* Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
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* definitely obsolete. Do not use it if you can avoid it
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*/
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#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
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_IOWR('p', 0x40, int)
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#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
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#endif /* _PPC64_NVRAM_H */
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