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
  17 extern struct linux_romvec *romvec;
  18 extern int prom_argc;
  19
  20 extern 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
  27 extern 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. */
  34 extern void prom_putchar(char c);
  35 extern char prom_getchar(void);
  36
  37 /* Get next memory descriptor after CURR, returns first descriptor
  38  * in chain is CURR is NULL.
  39  */
  40 extern 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  */
  46 extern 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. */
  52 extern pcomponent *ArcGetPeer(pcomponent *this);
  53
  54 /* Get child component of THIS. */
  55 extern pcomponent *ArcGetChild(pcomponent *this);
  56
  57 /* This is called at prom_init time to identify the
  58  * ARC architecture we are running on
  59  */
  60 extern void prom_identify_arch(void);
  61
  62 /* Environment variable routines. */
  63 extern PCHAR ArcGetEnvironmentVariable(PCHAR name);
  64 extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value);
  65
  66 /* ARCS command line parsing. */
  67 extern void prom_init_cmdline(void);
  68
  69 /* File operations. */
  70 extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
  71 extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
  72
  73 /* Misc. routines. */
  74 extern VOID ArcHalt(VOID) __noreturn;
  75 extern VOID ArcPowerDown(VOID) __noreturn;
  76 extern VOID ArcRestart(VOID) __noreturn;
  77 extern VOID ArcReboot(VOID) __noreturn;
  78 extern VOID ArcEnterInteractiveMode(VOID) __noreturn;
  79 extern VOID ArcFlushAllCaches(VOID);
  80 extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID);
  81
  82 #endif /* _ASM_SGIALIB_H */