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 <asm/sgiarcs.h>
  15
  16 extern struct linux_romvec *romvec;
  17 extern int prom_argc;
  18
  19 extern LONG *_prom_argv, *_prom_envp;
  20
  21 /* A 32-bit ARC PROM pass arguments and environment as 32-bit pointer.
  22    These macros take care of sign extension.  */
  23 #define prom_argv(index) ((char *) (long) _prom_argv[(index)])
  24 #define prom_argc(index) ((char *) (long) _prom_argc[(index)])
  25
  26 extern int prom_flags;
  27
  28 #define PROM_FLAG_ARCS                  1
  29 #define PROM_FLAG_USE_AS_CONSOLE        2
  30 #define PROM_FLAG_DONT_FREE_TEMP        4
  31
  32 /* Simple char-by-char console I/O. */
  33 extern void prom_putchar(char c);
  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 ArcReboot(VOID) __attribute__((noreturn));
  74 extern VOID ArcEnterInteractiveMode(VOID) __attribute__((noreturn));
  75 extern VOID ArcFlushAllCaches(VOID);
  76 extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID);
  77
  78 #endif /* _ASM_SGIALIB_H */