include/asm-mips/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 /* Generic printf() using ARCS console I/O. */
  37 extern void prom_printf(char *fmt, ...);
  38
  39 /* Memory descriptor management. */
  40 #define PROM_MAX_PMEMBLOCKS    32
  41 struct prom_pmemblock {
  42         LONG    base;           /* Within KSEG0 or XKPHYS. */
  43         ULONG   size;           /* In bytes. */
  44         ULONG   type;           /* free or prom memory */
  45 };
  46
  47 /* Get next memory descriptor after CURR, returns first descriptor
  48  * in chain is CURR is NULL.
  49  */
  50 extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr);
  51 #define PROM_NULL_MDESC   ((struct linux_mdesc *) 0)
  52
  53 /* Called by prom_init to setup the physical memory pmemblock
  54  * array.
  55  */
  56 extern void prom_meminit(void);
  57 extern void prom_fixup_mem_map(unsigned long start_mem, unsigned long end_mem);
  58
  59 /* PROM device tree library routines. */
  60 #define PROM_NULL_COMPONENT ((pcomponent *) 0)
  61
  62 /* Get sibling component of THIS. */
  63 extern pcomponent *ArcGetPeer(pcomponent *this);
  64
  65 /* Get child component of THIS. */
  66 extern pcomponent *ArcGetChild(pcomponent *this);
  67
  68 /* Get parent component of CHILD. */
  69 extern pcomponent *prom_getparent(pcomponent *child);
  70
  71 /* Copy component opaque data of component THIS into BUFFER
  72  * if component THIS has opaque data.  Returns success or
  73  * failure status.
  74  */
  75 extern long prom_getcdata(void *buffer, pcomponent *this);
  76
  77 /* Other misc. component routines. */
  78 extern pcomponent *prom_childadd(pcomponent *this, pcomponent *tmp, void *data);
  79 extern long prom_delcomponent(pcomponent *this);
  80 extern pcomponent *prom_componentbypath(char *path);
  81
  82 /* This is called at prom_init time to identify the
  83  * ARC architecture we are running on
  84  */
  85 extern void prom_identify_arch(void);
  86
  87 /* Environment variable routines. */
  88 extern PCHAR ArcGetEnvironmentVariable(PCHAR name);
  89 extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value);
  90
  91 /* ARCS command line acquisition and parsing. */
  92 extern char *prom_getcmdline(void);
  93 extern void prom_init_cmdline(void);
  94
  95 /* Acquiring info about the current time, etc. */
  96 extern struct linux_tinfo *prom_gettinfo(void);
  97 extern unsigned long prom_getrtime(void);
  98
  99 /* File operations. */
 100 extern long prom_getvdirent(unsigned long fd, struct linux_vdirent *ent, unsigned long num, unsigned long *cnt);
 101 extern long prom_open(char *name, enum linux_omode md, unsigned long *fd);
 102 extern long prom_close(unsigned long fd);
 103 extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
 104 extern long prom_getrstatus(unsigned long fd);
 105 extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
 106 extern long prom_seek(unsigned long fd, struct linux_bigint *off, enum linux_seekmode sm);
 107 extern long prom_mount(char *name, enum linux_mountops op);
 108 extern long prom_getfinfo(unsigned long fd, struct linux_finfo *buf);
 109 extern long prom_setfinfo(unsigned long fd, unsigned long flags, unsigned long msk);
 110
 111 /* Running stand-along programs. */
 112 extern long prom_load(char *name, unsigned long end, unsigned long *pc, unsigned long *eaddr);
 113 extern long prom_invoke(unsigned long pc, unsigned long sp, long argc, char **argv, char **envp);
 114 extern long prom_exec(char *name, long argc, char **argv, char **envp);
 115
 116 /* Misc. routines. */
 117 extern VOID prom_halt(VOID) __attribute__((noreturn));
 118 extern VOID prom_powerdown(VOID) __attribute__((noreturn));
 119 extern VOID prom_restart(VOID) __attribute__((noreturn));
 120 extern VOID ArcReboot(VOID) __attribute__((noreturn));
 121 extern VOID ArcEnterInteractiveMode(VOID) __attribute__((noreturn));
 122 extern long prom_cfgsave(VOID);
 123 extern struct linux_sysid *prom_getsysid(VOID);
 124 extern VOID ArcFlushAllCaches(VOID);
 125 extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID);
 126
 127 #endif /* _ASM_SGIALIB_H */