LXR linux/arch/mips/include/asm/sgialib.h

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * SGI ARCS firmware interface library for the Linux kernel.
   7 *
   8 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
   9 * Copyright (C) 2001, 2002 Ralf Baechle (ralf@gnu.org)
  10 */
  11#ifndef _ASM_SGIALIB_H
  12#define _ASM_SGIALIB_H
  13
  14#include <linux/compiler.h>
  15#include <asm/sgiarcs.h>
  16
  17extern struct linux_romvec *romvec;
  18extern int prom_argc;
  19
  20extern LONG *_prom_argv, *_prom_envp;
  21
  22/* A 32-bit ARC PROM pass arguments and environment as 32-bit pointer.
  23   These macros take care of sign extension.  */
  24#define prom_argv(index) ((char *) (long) _prom_argv[(index)])
  25#define prom_argc(index) ((char *) (long) _prom_argc[(index)])
  26
  27extern int prom_flags;
  28
  29#define PROM_FLAG_ARCS                  1
  30#define PROM_FLAG_USE_AS_CONSOLE        2
  31#define PROM_FLAG_DONT_FREE_TEMP        4
  32
  33/* Simple char-by-char console I/O. */
  34extern void prom_putchar(char c);
  35extern char prom_getchar(void);
  36
  37/* Get next memory descriptor after CURR, returns first descriptor
  38 * in chain is CURR is NULL.
  39 */
  40extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr);
  41#define PROM_NULL_MDESC   ((struct linux_mdesc *) 0)
  42
  43/* Called by prom_init to setup the physical memory pmemblock
  44 * array.
  45 */
  46extern void prom_meminit(void);
  47
  48/* PROM device tree library routines. */
  49#define PROM_NULL_COMPONENT ((pcomponent *) 0)
  50
  51/* Get sibling component of THIS. */
  52extern pcomponent *ArcGetPeer(pcomponent *this);
  53
  54/* Get child component of THIS. */
  55extern pcomponent *ArcGetChild(pcomponent *this);
  56
  57/* This is called at prom_init time to identify the
  58 * ARC architecture we are running on
  59 */
  60extern void prom_identify_arch(void);
  61
  62/* Environment variable routines. */
  63extern PCHAR ArcGetEnvironmentVariable(PCHAR name);
  64extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value);
  65
  66/* ARCS command line parsing. */
  67extern void prom_init_cmdline(void);
  68
  69/* File operations. */
  70extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
  71extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
  72
  73/* Misc. routines. */
  74extern VOID ArcHalt(VOID) __noreturn;
  75extern VOID ArcPowerDown(VOID) __noreturn;
  76extern VOID ArcRestart(VOID) __noreturn;
  77extern VOID ArcReboot(VOID) __noreturn;
  78extern VOID ArcEnterInteractiveMode(VOID) __noreturn;
  79extern VOID ArcFlushAllCaches(VOID);
  80extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID);
  81
  82#endif /* _ASM_SGIALIB_H */
  83