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kernel/linux-rt-4.4.41/arch/mips/include/asm/dec/prom.h 5.34 KB
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  /*
   *	include/asm-mips/dec/prom.h
   *
   *	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 *)CKSEG1ADDR(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_64BIT
  
  #define prom_is_rex(magic)	1	/* KN04 and KN05 are REX PROMs.  */
  
  #else /* !CONFIG_64BIT */
  
  #define prom_is_rex(magic)	((magic) == REX_PROM_MAGIC)
  
  #endif /* !CONFIG_64BIT */
  
  
  /*
   * 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_64BIT
  
  /*
   * On MIPS64 we have to call PROM functions via a helper
   * dispatcher to accommodate ABI incompatibilities.
   */
  #define __DEC_PROM_O32(fun, arg) fun arg __asm__(#fun); \
  				 __asm__(#fun " = call_o32")
  
  int __DEC_PROM_O32(_rex_bootinit, (int (*)(void), void *));
  int __DEC_PROM_O32(_rex_bootread, (int (*)(void), void *));
  int __DEC_PROM_O32(_rex_getbitmap, (int (*)(memmap *), void *, memmap *));
  unsigned long *__DEC_PROM_O32(_rex_slot_address,
  			     (unsigned long *(*)(int), void *, int));
  void *__DEC_PROM_O32(_rex_gettcinfo, (void *(*)(void), void *));
  int __DEC_PROM_O32(_rex_getsysid, (int (*)(void), void *));
  void __DEC_PROM_O32(_rex_clear_cache, (void (*)(void), void *));
  
  int __DEC_PROM_O32(_prom_getchar, (int (*)(void), void *));
  char *__DEC_PROM_O32(_prom_getenv, (char *(*)(char *), void *, char *));
  int __DEC_PROM_O32(_prom_printf, (int (*)(char *, ...), void *, char *, ...));
  
  
  #define rex_bootinit()		_rex_bootinit(__rex_bootinit, NULL)
  #define rex_bootread()		_rex_bootread(__rex_bootread, NULL)
  #define rex_getbitmap(x)	_rex_getbitmap(__rex_getbitmap, NULL, x)
  #define rex_slot_address(x)	_rex_slot_address(__rex_slot_address, NULL, x)
  #define rex_gettcinfo()		_rex_gettcinfo(__rex_gettcinfo, NULL)
  #define rex_getsysid()		_rex_getsysid(__rex_getsysid, NULL)
  #define rex_clear_cache()	_rex_clear_cache(__rex_clear_cache, NULL)
  
  #define prom_getchar()		_prom_getchar(__prom_getchar, NULL)
  #define prom_getenv(x)		_prom_getenv(__prom_getenv, NULL, x)
  #define prom_printf(x...)	_prom_printf(__prom_printf, NULL, x)
  
  #else /* !CONFIG_64BIT */
  
  /*
   * 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_64BIT */
  
  
  extern void prom_meminit(u32);
  extern void prom_identify_arch(u32);
  extern void prom_init_cmdline(s32, s32 *, u32);
  
  extern void register_prom_console(void);
  extern void unregister_prom_console(void);
  
  #endif /* _ASM_DEC_PROM_H */