root/arch/mips/include/asm/sgialib.h

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INCLUDED FROM

   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 char prom_getchar(void);
  35 
  36 /* Get next memory descriptor after CURR, returns first descriptor
  37  * in chain is CURR is NULL.
  38  */
  39 extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr);
  40 #define PROM_NULL_MDESC   ((struct linux_mdesc *) 0)
  41 
  42 /* Called by prom_init to setup the physical memory pmemblock
  43  * array.
  44  */
  45 extern void prom_meminit(void);
  46 
  47 /* PROM device tree library routines. */
  48 #define PROM_NULL_COMPONENT ((pcomponent *) 0)
  49 
  50 /* Get sibling component of THIS. */
  51 extern pcomponent *ArcGetPeer(pcomponent *this);
  52 
  53 /* Get child component of THIS. */
  54 extern pcomponent *ArcGetChild(pcomponent *this);
  55 
  56 /* This is called at prom_init time to identify the
  57  * ARC architecture we are running on
  58  */
  59 extern void prom_identify_arch(void);
  60 
  61 /* Environment variable routines. */
  62 extern PCHAR ArcGetEnvironmentVariable(PCHAR name);
  63 extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value);
  64 
  65 /* ARCS command line parsing. */
  66 extern void prom_init_cmdline(void);
  67 
  68 /* File operations. */
  69 extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
  70 extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
  71 
  72 /* Misc. routines. */
  73 extern VOID ArcHalt(VOID) __noreturn;
  74 extern VOID ArcPowerDown(VOID) __noreturn;
  75 extern VOID ArcRestart(VOID) __noreturn;
  76 extern VOID ArcReboot(VOID) __noreturn;
  77 extern VOID ArcEnterInteractiveMode(VOID) __noreturn;
  78 extern VOID ArcFlushAllCaches(VOID);
  79 extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID);
  80 
  81 #endif /* _ASM_SGIALIB_H */
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