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
6 * SGI ARCS firmware interface library for the Linux kernel.
8 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
9 * Copyright (C) 2001, 2002 Ralf Baechle (ralf@gnu.org)
11 #ifndef _ASM_SGIALIB_H
12 #define _ASM_SGIALIB_H
14 #include <asm/sgiarcs.h>
16 extern struct linux_romvec *romvec;
19 extern LONG *_prom_argv, *_prom_envp;
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)])
26 extern int prom_flags;
28 #define PROM_FLAG_ARCS 1
29 #define PROM_FLAG_USE_AS_CONSOLE 2
30 #define PROM_FLAG_DONT_FREE_TEMP 4
32 /* Simple char-by-char console I/O. */
33 extern void prom_putchar(char c);
34 extern char prom_getchar(void);
36 /* Generic printf() using ARCS console I/O. */
37 extern void prom_printf(char *fmt, ...);
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 */
47 /* Get next memory descriptor after CURR, returns first descriptor
48 * in chain is CURR is NULL.
50 extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr);
51 #define PROM_NULL_MDESC ((struct linux_mdesc *) 0)
53 /* Called by prom_init to setup the physical memory pmemblock
56 extern void prom_meminit(void);
57 extern void prom_fixup_mem_map(unsigned long start_mem, unsigned long end_mem);
59 /* PROM device tree library routines. */
60 #define PROM_NULL_COMPONENT ((pcomponent *) 0)
62 /* Get sibling component of THIS. */
63 extern pcomponent *ArcGetPeer(pcomponent *this);
65 /* Get child component of THIS. */
66 extern pcomponent *ArcGetChild(pcomponent *this);
68 /* Get parent component of CHILD. */
69 extern pcomponent *prom_getparent(pcomponent *child);
71 /* Copy component opaque data of component THIS into BUFFER
72 * if component THIS has opaque data. Returns success or
75 extern long prom_getcdata(void *buffer, pcomponent *this);
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);
82 /* This is called at prom_init time to identify the
83 * ARC architecture we are running on
85 extern void prom_identify_arch(void);
87 /* Environment variable routines. */
88 extern PCHAR ArcGetEnvironmentVariable(PCHAR name);
89 extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value);
91 /* ARCS command line acquisition and parsing. */
92 extern char *prom_getcmdline(void);
93 extern void prom_init_cmdline(void);
95 /* Acquiring info about the current time, etc. */
96 extern struct linux_tinfo *prom_gettinfo(void);
97 extern unsigned long prom_getrtime(void);
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);
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);
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);
127 #endif /* _ASM_SGIALIB_H */