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/*

 * PreP compliant NVRAM access

 */

#ifdef __KERNEL__

#ifndef _PPC_NVRAM_H

#define _PPC_NVRAM_H

#define NVRAM_AS0  0x74

#define NVRAM_AS1  0x75

#define NVRAM_DATA 0x77

/* RTC Offsets */

#define MOTO_RTC_SECONDS                0x1FF9

#define MOTO_RTC_MINUTES                0x1FFA

#define MOTO_RTC_HOURS          0x1FFB

#define MOTO_RTC_DAY_OF_WEEK            0x1FFC

#define MOTO_RTC_DAY_OF_MONTH   0x1FFD

#define MOTO_RTC_MONTH          0x1FFE

#define MOTO_RTC_YEAR           0x1FFF

#define MOTO_RTC_CONTROLA            0x1FF8

#define MOTO_RTC_CONTROLB            0x1FF9

#ifndef BCD_TO_BIN

#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)

#endif

#ifndef BIN_TO_BCD

#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)

#endif

/* PowerMac specific nvram stuffs */

enum {

        pmac_nvram_OF,          /* Open Firmware partition */

        pmac_nvram_XPRAM,       /* MacOS XPRAM partition */

        pmac_nvram_NR           /* MacOS Name Registry partition */

};

/* Return partition offset in nvram */

extern int      pmac_get_partition(int partition);

/* Direct access to XPRAM */

extern u8       pmac_xpram_read(int xpaddr);

extern void     pmac_xpram_write(int xpaddr, u8 data);

/* Some offsets in XPRAM */

#define PMAC_XPRAM_MACHINE_LOC  0xe4

#define PMAC_XPRAM_SOUND_VOLUME 0x08

/* Machine location structure in XPRAM */

struct pmac_machine_location {

        unsigned int    latitude;       /* 2+30 bit Fractional number */

        unsigned int    longitude;      /* 2+30 bit Fractional number */

        unsigned int    delta;          /* mix of GMT delta and DLS */

};

/* /dev/nvram ioctls */

#define PMAC_NVRAM_GET_OFFSET   _IOWR('p', 0x40, int) /* Get NVRAM partition offset */

#endif

#endif /* __KERNEL__ */