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 (dm@engr.sgi.com)
   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 /* Memory descriptor management. */
  37 #define PROM_MAX_PMEMBLOCKS    32
  38 struct prom_pmemblock {
  39         LONG    base;           /* Within KSEG0 or XKPHYS. */
  40         ULONG   size;           /* In bytes. */
  41         ULONG   type;           /* free or prom memory */
  42 };
  43
  44 /* Get next memory descriptor after CURR, returns first descriptor
  45  * in chain is CURR is NULL.
  46  */
  47 extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr);
  48 #define PROM_NULL_MDESC   ((struct linux_mdesc *) 0)
  49
  50 /* Called by prom_init to setup the physical memory pmemblock
  51  * array.
  52  */
  53 extern void prom_meminit(void);
  54 extern void prom_fixup_mem_map(unsigned long start_mem, unsigned long end_mem);
  55
  56 /* PROM device tree library routines. */
  57 #define PROM_NULL_COMPONENT ((pcomponent *) 0)
  58
  59 /* Get sibling component of THIS. */
  60 extern pcomponent *ArcGetPeer(pcomponent *this);
  61
  62 /* Get child component of THIS. */
  63 extern pcomponent *ArcGetChild(pcomponent *this);
  64
  65 /* Get parent component of CHILD. */
  66 extern pcomponent *prom_getparent(pcomponent *child);
  67
  68 /* Copy component opaque data of component THIS into BUFFER
  69  * if component THIS has opaque data.  Returns success or
  70  * failure status.
  71  */
  72 extern long prom_getcdata(void *buffer, pcomponent *this);
  73
  74 /* Other misc. component routines. */
  75 extern pcomponent *prom_childadd(pcomponent *this, pcomponent *tmp, void *data);
  76 extern long prom_delcomponent(pcomponent *this);
  77 extern pcomponent *prom_componentbypath(char *path);
  78
  79 /* This is called at prom_init time to identify the
  80  * ARC architecture we are running on
  81  */
  82 extern void prom_identify_arch(void);
  83
  84 /* Environment variable routines. */
  85 extern PCHAR ArcGetEnvironmentVariable(PCHAR name);
  86 extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value);
  87
  88 /* ARCS command line acquisition and parsing. */
  89 extern char *prom_getcmdline(void);
  90 extern void prom_init_cmdline(void);
  91
  92 /* Acquiring info about the current time, etc. */
  93 extern struct linux_tinfo *prom_gettinfo(void);
  94 extern unsigned long prom_getrtime(void);
  95
  96 /* File operations. */
  97 extern long prom_getvdirent(unsigned long fd, struct linux_vdirent *ent, unsigned long num, unsigned long *cnt);
  98 extern long prom_open(char *name, enum linux_omode md, unsigned long *fd);
  99 extern long prom_close(unsigned long fd);
 100 extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
 101 extern long prom_getrstatus(unsigned long fd);
 102 extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
 103 extern long prom_seek(unsigned long fd, struct linux_bigint *off, enum linux_seekmode sm);
 104 extern long prom_mount(char *name, enum linux_mountops op);
 105 extern long prom_getfinfo(unsigned long fd, struct linux_finfo *buf);
 106 extern long prom_setfinfo(unsigned long fd, unsigned long flags, unsigned long msk);
 107
 108 /* Running stand-along programs. */
 109 extern long prom_load(char *name, unsigned long end, unsigned long *pc, unsigned long *eaddr);
 110 extern long prom_invoke(unsigned long pc, unsigned long sp, long argc, char **argv, char **envp);
 111 extern long prom_exec(char *name, long argc, char **argv, char **envp);
 112
 113 /* Misc. routines. */
 114 extern VOID prom_halt(VOID) __attribute__((noreturn));
 115 extern VOID prom_powerdown(VOID) __attribute__((noreturn));
 116 extern VOID prom_restart(VOID) __attribute__((noreturn));
 117 extern VOID ArcReboot(VOID) __attribute__((noreturn));
 118 extern VOID ArcEnterInteractiveMode(VOID) __attribute__((noreturn));
 119 extern long prom_cfgsave(VOID);
 120 extern struct linux_sysid *prom_getsysid(VOID);
 121 extern VOID ArcFlushAllCaches(VOID);
 122 extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID);
 123
 124 #endif /* _ASM_SGIALIB_H */