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sgialib.h
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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 ([email protected])
9  * Copyright (C) 2001, 2002 Ralf Baechle ([email protected])
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. */
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));
77 
78 #endif /* _ASM_SGIALIB_H */