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/*

 *      DECstation PROM interface.

 *

 *      Copyright (C) 2002  Maciej W. Rozycki

 *

 *      This program is free software; you can redistribute it and/or

 *      modify it under the terms of the GNU General Public License

 *      as published by the Free Software Foundation; either version

 *      2 of the License, or (at your option) any later version.

 *

 *      Based on arch/mips/dec/prom/prom.h by the Anonymous.

 */

#ifndef __ASM_DEC_PROM_H

#define __ASM_DEC_PROM_H

#include <linux/types.h>

#include <asm/addrspace.h>

/*

 * PMAX/3MAX PROM entry points for DS2100/3100's and DS5000/2xx's.

 * Many of these will work for MIPSen as well!

 */

#define VEC_RESET               (u64 *)KSEG1ADDR(0x1fc00000)

                                                        /* Prom base address */

#define PMAX_PROM_ENTRY(x)      (VEC_RESET + (x))       /* Prom jump table */

#define PMAX_PROM_HALT          PMAX_PROM_ENTRY(2)      /* valid on MIPSen */

#define PMAX_PROM_AUTOBOOT      PMAX_PROM_ENTRY(5)      /* valid on MIPSen */

#define PMAX_PROM_OPEN          PMAX_PROM_ENTRY(6)

#define PMAX_PROM_READ          PMAX_PROM_ENTRY(7)

#define PMAX_PROM_CLOSE         PMAX_PROM_ENTRY(10)

#define PMAX_PROM_LSEEK         PMAX_PROM_ENTRY(11)

#define PMAX_PROM_GETCHAR       PMAX_PROM_ENTRY(12)

#define PMAX_PROM_PUTCHAR       PMAX_PROM_ENTRY(13)     /* 12 on MIPSen */

#define PMAX_PROM_GETS          PMAX_PROM_ENTRY(15)

#define PMAX_PROM_PRINTF        PMAX_PROM_ENTRY(17)

#define PMAX_PROM_GETENV        PMAX_PROM_ENTRY(33)     /* valid on MIPSen */

/*

 * Magic number indicating REX PROM available on DECstation.  Found in

 * register a2 on transfer of control to program from PROM.

 */

#define REX_PROM_MAGIC          0x30464354

#ifdef CONFIG_MIPS64

#define prom_is_rex(magic)      1       /* KN04 and KN05 are REX PROMs.  */

#else /* !CONFIG_MIPS64 */

#define prom_is_rex(magic)      ((magic) == REX_PROM_MAGIC)

#endif /* !CONFIG_MIPS64 */

/*

 * 3MIN/MAXINE PROM entry points for DS5000/1xx's, DS5000/xx's and

 * DS5000/2x0.

 */

#define REX_PROM_GETBITMAP      0x84/4  /* get mem bitmap */

#define REX_PROM_GETCHAR        0x24/4  /* getch() */

#define REX_PROM_GETENV         0x64/4  /* get env. variable */

#define REX_PROM_GETSYSID       0x80/4  /* get system id */

#define REX_PROM_GETTCINFO      0xa4/4

#define REX_PROM_PRINTF         0x30/4  /* printf() */

#define REX_PROM_SLOTADDR       0x6c/4  /* slotaddr */

#define REX_PROM_BOOTINIT       0x54/4  /* open() */

#define REX_PROM_BOOTREAD       0x58/4  /* read() */

#define REX_PROM_CLEARCACHE     0x7c/4

/*

 * Used by rex_getbitmap().

 */

typedef struct {

        int pagesize;

        unsigned char bitmap[0];

} memmap;

/*

 * Function pointers as read from a PROM's callback vector.

 */

extern int (*__rex_bootinit)(void);

extern int (*__rex_bootread)(void);

extern int (*__rex_getbitmap)(memmap *);

extern unsigned long *(*__rex_slot_address)(int);

extern void *(*__rex_gettcinfo)(void);

extern int (*__rex_getsysid)(void);

extern void (*__rex_clear_cache)(void);

extern int (*__prom_getchar)(void);

extern char *(*__prom_getenv)(char *);

extern int (*__prom_printf)(char *, ...);

extern int (*__pmax_open)(char*, int);

extern int (*__pmax_lseek)(int, long, int);

extern int (*__pmax_read)(int, void *, int);

extern int (*__pmax_close)(int);

#ifdef CONFIG_MIPS64

/*

 * On MIPS64 we have to call PROM functions via a helper

 * dispatcher to accomodate ABI incompatibilities.

 */

#define __DEC_PROM_O32 __attribute__((alias("call_o32")))

int _rex_bootinit(int (*)(void)) __DEC_PROM_O32;

int _rex_bootread(int (*)(void)) __DEC_PROM_O32;

int _rex_getbitmap(int (*)(memmap *), memmap *) __DEC_PROM_O32;

unsigned long *_rex_slot_address(unsigned long *(*)(int), int) __DEC_PROM_O32;

void *_rex_gettcinfo(void *(*)(void)) __DEC_PROM_O32;

int _rex_getsysid(int (*)(void)) __DEC_PROM_O32;

void _rex_clear_cache(void (*)(void)) __DEC_PROM_O32;

int _prom_getchar(int (*)(void)) __DEC_PROM_O32;

char *_prom_getenv(char *(*)(char *), char *) __DEC_PROM_O32;

int _prom_printf(int (*)(char *, ...), char *, ...) __DEC_PROM_O32;

#define rex_bootinit()          _rex_bootinit(__rex_bootinit)

#define rex_bootread()          _rex_bootread(__rex_bootread)

#define rex_getbitmap(x)        _rex_getbitmap(__rex_getbitmap, x)

#define rex_slot_address(x)     _rex_slot_address(__rex_slot_address, x)

#define rex_gettcinfo()         _rex_gettcinfo(__rex_gettcinfo)

#define rex_getsysid()          _rex_getsysid(__rex_getsysid)

#define rex_clear_cache()       _rex_clear_cache(__rex_clear_cache)

#define prom_getchar()          _prom_getchar(__prom_getchar)

#define prom_getenv(x)          _prom_getenv(__prom_getenv, x)

#define prom_printf(x...)       _prom_printf(__prom_printf, x)

#else /* !CONFIG_MIPS64 */

/*

 * On plain MIPS we just call PROM functions directly.

 */

#define rex_bootinit            __rex_bootinit

#define rex_bootread            __rex_bootread

#define rex_getbitmap           __rex_getbitmap

#define rex_slot_address        __rex_slot_address

#define rex_gettcinfo           __rex_gettcinfo

#define rex_getsysid            __rex_getsysid

#define rex_clear_cache         __rex_clear_cache

#define prom_getchar            __prom_getchar

#define prom_getenv             __prom_getenv

#define prom_printf             __prom_printf

#define pmax_open               __pmax_open

#define pmax_lseek              __pmax_lseek

#define pmax_read               __pmax_read

#define pmax_close              __pmax_close

#endif /* !CONFIG_MIPS64 */

extern void prom_meminit(u32);

extern void prom_identify_arch(u32);

extern void prom_init_cmdline(s32, s32 *, u32);

#endif /* __ASM_DEC_PROM_H */