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1 /*
2  *	include/asm-mips/dec/prom.h
3  *
4  *	DECstation PROM interface.
5  *
6  *	Copyright (C) 2002  Maciej W. Rozycki
7  *
8  *	This program is free software; you can redistribute it and/or
9  *	modify it under the terms of the GNU General Public License
10  *	as published by the Free Software Foundation; either version
11  *	2 of the License, or (at your option) any later version.
12  *
13  *	Based on arch/mips/dec/prom/prom.h by the Anonymous.
14  */
15 #ifndef _ASM_DEC_PROM_H
16 #define _ASM_DEC_PROM_H
17 
18 #include <linux/types.h>
19 
20 #include <asm/addrspace.h>
21 
22 /*
23  * PMAX/3MAX PROM entry points for DS2100/3100's and DS5000/2xx's.
24  * Many of these will work for MIPSen as well!
25  */
26 #define VEC_RESET		(u64 *)CKSEG1ADDR(0x1fc00000)
27 							/* Prom base address */
28 
29 #define PMAX_PROM_ENTRY(x)	(VEC_RESET + (x))	/* Prom jump table */
30 
31 #define PMAX_PROM_HALT		PMAX_PROM_ENTRY(2)	/* valid on MIPSen */
32 #define PMAX_PROM_AUTOBOOT	PMAX_PROM_ENTRY(5)	/* valid on MIPSen */
33 #define PMAX_PROM_OPEN		PMAX_PROM_ENTRY(6)
34 #define PMAX_PROM_READ		PMAX_PROM_ENTRY(7)
35 #define PMAX_PROM_CLOSE		PMAX_PROM_ENTRY(10)
36 #define PMAX_PROM_LSEEK		PMAX_PROM_ENTRY(11)
37 #define PMAX_PROM_GETCHAR	PMAX_PROM_ENTRY(12)
38 #define PMAX_PROM_PUTCHAR	PMAX_PROM_ENTRY(13)	/* 12 on MIPSen */
39 #define PMAX_PROM_GETS		PMAX_PROM_ENTRY(15)
40 #define PMAX_PROM_PRINTF	PMAX_PROM_ENTRY(17)
41 #define PMAX_PROM_GETENV	PMAX_PROM_ENTRY(33)	/* valid on MIPSen */
42 
43 
44 /*
45  * Magic number indicating REX PROM available on DECstation.  Found in
46  * register a2 on transfer of control to program from PROM.
47  */
48 #define REX_PROM_MAGIC		0x30464354
49 
50 #ifdef CONFIG_64BIT
51 
52 #define prom_is_rex(magic)	1	/* KN04 and KN05 are REX PROMs.  */
53 
54 #else /* !CONFIG_64BIT */
55 
56 #define prom_is_rex(magic)	((magic) == REX_PROM_MAGIC)
57 
58 #endif /* !CONFIG_64BIT */
59 
60 
61 /*
62  * 3MIN/MAXINE PROM entry points for DS5000/1xx's, DS5000/xx's and
63  * DS5000/2x0.
64  */
65 #define REX_PROM_GETBITMAP	0x84/4	/* get mem bitmap */
66 #define REX_PROM_GETCHAR	0x24/4	/* getch() */
67 #define REX_PROM_GETENV		0x64/4	/* get env. variable */
68 #define REX_PROM_GETSYSID	0x80/4	/* get system id */
69 #define REX_PROM_GETTCINFO	0xa4/4
70 #define REX_PROM_PRINTF		0x30/4	/* printf() */
71 #define REX_PROM_SLOTADDR	0x6c/4	/* slotaddr */
72 #define REX_PROM_BOOTINIT	0x54/4	/* open() */
73 #define REX_PROM_BOOTREAD	0x58/4	/* read() */
74 #define REX_PROM_CLEARCACHE	0x7c/4
75 
76 
77 /*
78  * Used by rex_getbitmap().
79  */
80 typedef struct {
81 	int pagesize;
82 	unsigned char bitmap[0];
83 } memmap;
84 
85 
86 /*
87  * Function pointers as read from a PROM's callback vector.
88  */
89 extern int (*__rex_bootinit)(void);
90 extern int (*__rex_bootread)(void);
91 extern int (*__rex_getbitmap)(memmap *);
92 extern unsigned long *(*__rex_slot_address)(int);
93 extern void *(*__rex_gettcinfo)(void);
94 extern int (*__rex_getsysid)(void);
95 extern void (*__rex_clear_cache)(void);
96 
97 extern int (*__prom_getchar)(void);
98 extern char *(*__prom_getenv)(char *);
99 extern int (*__prom_printf)(char *, ...);
100 
101 extern int (*__pmax_open)(char*, int);
102 extern int (*__pmax_lseek)(int, long, int);
103 extern int (*__pmax_read)(int, void *, int);
104 extern int (*__pmax_close)(int);
105 
106 
107 #ifdef CONFIG_64BIT
108 
109 /*
110  * On MIPS64 we have to call PROM functions via a helper
111  * dispatcher to accommodate ABI incompatibilities.
112  */
113 #define __DEC_PROM_O32(fun, arg) fun arg __asm__(#fun); \
114 				 __asm__(#fun " = call_o32")
115 
116 int __DEC_PROM_O32(_rex_bootinit, (int (*)(void), void *));
117 int __DEC_PROM_O32(_rex_bootread, (int (*)(void), void *));
118 int __DEC_PROM_O32(_rex_getbitmap, (int (*)(memmap *), void *, memmap *));
119 unsigned long *__DEC_PROM_O32(_rex_slot_address,
120 			     (unsigned long *(*)(int), void *, int));
121 void *__DEC_PROM_O32(_rex_gettcinfo, (void *(*)(void), void *));
122 int __DEC_PROM_O32(_rex_getsysid, (int (*)(void), void *));
123 void __DEC_PROM_O32(_rex_clear_cache, (void (*)(void), void *));
124 
125 int __DEC_PROM_O32(_prom_getchar, (int (*)(void), void *));
126 char *__DEC_PROM_O32(_prom_getenv, (char *(*)(char *), void *, char *));
127 int __DEC_PROM_O32(_prom_printf, (int (*)(char *, ...), void *, char *, ...));
128 
129 
130 #define rex_bootinit()		_rex_bootinit(__rex_bootinit, NULL)
131 #define rex_bootread()		_rex_bootread(__rex_bootread, NULL)
132 #define rex_getbitmap(x)	_rex_getbitmap(__rex_getbitmap, NULL, x)
133 #define rex_slot_address(x)	_rex_slot_address(__rex_slot_address, NULL, x)
134 #define rex_gettcinfo()		_rex_gettcinfo(__rex_gettcinfo, NULL)
135 #define rex_getsysid()		_rex_getsysid(__rex_getsysid, NULL)
136 #define rex_clear_cache()	_rex_clear_cache(__rex_clear_cache, NULL)
137 
138 #define prom_getchar()		_prom_getchar(__prom_getchar, NULL)
139 #define prom_getenv(x)		_prom_getenv(__prom_getenv, NULL, x)
140 #define prom_printf(x...)	_prom_printf(__prom_printf, NULL, x)
141 
142 #else /* !CONFIG_64BIT */
143 
144 /*
145  * On plain MIPS we just call PROM functions directly.
146  */
147 #define rex_bootinit		__rex_bootinit
148 #define rex_bootread		__rex_bootread
149 #define rex_getbitmap		__rex_getbitmap
150 #define rex_slot_address	__rex_slot_address
151 #define rex_gettcinfo		__rex_gettcinfo
152 #define rex_getsysid		__rex_getsysid
153 #define rex_clear_cache		__rex_clear_cache
154 
155 #define prom_getchar		__prom_getchar
156 #define prom_getenv		__prom_getenv
157 #define prom_printf		__prom_printf
158 
159 #define pmax_open		__pmax_open
160 #define pmax_lseek		__pmax_lseek
161 #define pmax_read		__pmax_read
162 #define pmax_close		__pmax_close
163 
164 #endif /* !CONFIG_64BIT */
165 
166 
167 extern void prom_meminit(u32);
168 extern void prom_identify_arch(u32);
169 extern void prom_init_cmdline(s32, s32 *, u32);
170 
171 extern void register_prom_console(void);
172 extern void unregister_prom_console(void);
173 
174 #endif /* _ASM_DEC_PROM_H */
175