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
  19 extern int prom_flags;
  20
  21 #define PROM_FLAG_ARCS                  1
  22 #define PROM_FLAG_USE_AS_CONSOLE        2
  23 #define PROM_FLAG_DONT_FREE_TEMP        4
  24
  25 /* Simple char-by-char console I/O. */
  26 extern char prom_getchar(void);
  27
  28 /* Get next memory descriptor after CURR, returns first descriptor
  29  * in chain is CURR is NULL.
  30  */
  31 extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr);
  32 #define PROM_NULL_MDESC   ((struct linux_mdesc *) 0)
  33
  34 /* Called by prom_init to setup the physical memory pmemblock
  35  * array.
  36  */
  37 extern void prom_meminit(void);
  38
  39 /* PROM device tree library routines. */
  40 #define PROM_NULL_COMPONENT ((pcomponent *) 0)
  41
  42 /* This is called at prom_init time to identify the
  43  * ARC architecture we are running on
  44  */
  45 extern void prom_identify_arch(void);
  46
  47 /* Environment variable routines. */
  48 extern PCHAR ArcGetEnvironmentVariable(PCHAR name);
  49
  50 /* ARCS command line parsing. */
  51 extern void prom_init_cmdline(int argc, LONG *argv);
  52
  53 /* File operations. */
  54 extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
  55 extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
  56
  57 /* Misc. routines. */
  58 extern VOID ArcEnterInteractiveMode(VOID) __noreturn;
  59 extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID);
  60
  61 #endif /* _ASM_SGIALIB_H */