mirror of
https://github.com/torvalds/linux.git
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74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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/*
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* PreP compliant NVRAM access
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*/
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#ifdef __KERNEL__
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#ifndef _PPC_NVRAM_H
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#define _PPC_NVRAM_H
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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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/* 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 void nvram_sync(void);
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/* Normal access to NVRAM */
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extern unsigned char nvram_read_byte(int i);
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extern void nvram_write_byte(unsigned char c, int i);
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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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#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
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#endif
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#endif /* __KERNEL__ */
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