Annotation of sys/arch/i386/isa/isa_machdep.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: isa_machdep.h,v 1.21 2006/02/12 19:55:39 miod Exp $ */
2: /* $NetBSD: isa_machdep.h,v 1.7 1997/06/06 23:28:42 thorpej Exp $ */
3:
4: /*-
5: * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10: * NASA Ames Research Center.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the NetBSD
23: * Foundation, Inc. and its contributors.
24: * 4. Neither the name of The NetBSD Foundation nor the names of its
25: * contributors may be used to endorse or promote products derived
26: * from this software without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38: * POSSIBILITY OF SUCH DAMAGE.
39: */
40:
41: /*-
42: * Copyright (c) 1990 The Regents of the University of California.
43: * All rights reserved.
44: *
45: * This code is derived from software contributed to Berkeley by
46: * William Jolitz.
47: *
48: * Redistribution and use in source and binary forms, with or without
49: * modification, are permitted provided that the following conditions
50: * are met:
51: * 1. Redistributions of source code must retain the above copyright
52: * notice, this list of conditions and the following disclaimer.
53: * 2. Redistributions in binary form must reproduce the above copyright
54: * notice, this list of conditions and the following disclaimer in the
55: * documentation and/or other materials provided with the distribution.
56: * 3. Neither the name of the University nor the names of its contributors
57: * may be used to endorse or promote products derived from this software
58: * without specific prior written permission.
59: *
60: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70: * SUCH DAMAGE.
71: *
72: * @(#)isa.h 5.7 (Berkeley) 5/9/91
73: */
74:
75: /*
76: * Various pieces of the i386 port want to include this file without
77: * or in spite of using isavar.h, and should be fixed.
78: */
79:
80: #ifndef _I386_ISA_MACHDEP_H_ /* XXX */
81: #define _I386_ISA_MACHDEP_H_ /* XXX */
82:
83: #include <machine/bus.h>
84:
85: /*
86: * ISA can only DMA to 0-16M.
87: */
88: #define ISA_DMA_BOUNCE_THRESHOLD 0x00ffffff
89:
90: /*
91: * XXX THIS FILE IS A MESS. copyright: berkeley's probably.
92: * contents from isavar.h and isareg.h, mostly the latter.
93: * perhaps charles's?
94: *
95: * copyright from berkeley's isa.h which is now dev/isa/isareg.h.
96: */
97:
98: /*
99: * Types provided to machine-independent ISA code.
100: */
101: typedef void *isa_chipset_tag_t;
102:
103: struct device; /* XXX */
104: struct isabus_attach_args; /* XXX */
105:
106: /*
107: * Functions provided to machine-independent ISA code.
108: */
109: void isa_attach_hook(struct device *, struct device *,
110: struct isabus_attach_args *);
111: int isa_intr_alloc(isa_chipset_tag_t, int, int, int *);
112: int isa_intr_check(isa_chipset_tag_t, int, int);
113: void *isa_intr_establish(isa_chipset_tag_t ic, int irq, int type,
114: int level, int (*ih_fun)(void *), void *ih_arg, char *ih_what);
115: void isa_intr_disestablish(isa_chipset_tag_t ic, void *handler);
116:
117: /*
118: * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED
119: * BY PORTABLE CODE.
120: */
121:
122: extern struct i386_bus_dma_tag isa_bus_dma_tag;
123:
124: /*
125: * Cookie used by ISA dma. A pointer to one of these it stashed in
126: * the DMA map.
127: */
128: struct i386_isa_dma_cookie {
129: int id_flags; /* flags; see below */
130:
131: void *id_origbuf; /* pointer to orig buffer if
132: bouncing */
133: bus_size_t id_origbuflen; /* ...and size */
134:
135: void *id_bouncebuf; /* pointer to the bounce buffer */
136: bus_size_t id_bouncebuflen; /* ...and size */
137: int id_nbouncesegs; /* number of valid bounce segs */
138: bus_dma_segment_t id_bouncesegs[0]; /* array of bounce buffer
139: physical memory segments */
140: };
141:
142: /* id_flags */
143: #define ID_MIGHT_NEED_BOUNCE 0x01 /* map could need bounce buffers */
144: #define ID_HAS_BOUNCE 0x02 /* map currently has bounce buffers */
145: #define ID_IS_BOUNCING 0x04 /* map is bouncing current xfer */
146:
147: /*
148: * XXX Various seemingly PC-specific constants, some of which may be
149: * unnecessary anyway.
150: */
151:
152: /*
153: * RAM Physical Address Space (ignoring the above mentioned "hole")
154: */
155: #define RAM_BEGIN 0x0000000 /* Start of RAM Memory */
156: #define RAM_END 0x1000000 /* End of RAM Memory */
157: #define RAM_SIZE (RAM_END - RAM_BEGIN)
158:
159: /*
160: * Oddball Physical Memory Addresses
161: */
162: #define COMPAQ_RAMRELOC 0x80c00000 /* Compaq RAM relocation/diag */
163: #define COMPAQ_RAMSETUP 0x80c00002 /* Compaq RAM setup */
164: #define WEITEK_FPU 0xC0000000 /* WTL 2167 */
165: #define CYRIX_EMC 0xC0000000 /* Cyrix EMC */
166:
167: /*
168: * stuff that used to be in pccons.c
169: */
170: #define MONO_BUF 0xB0000
171: #define CGA_BUF 0xB8000
172: #define IOPHYSMEM 0xA0000
173:
174:
175: /*
176: * ISA DMA bounce buffers.
177: * XXX should be made partially machine- and bus-mapping-independent.
178: *
179: * DMA_BOUNCE is the number of pages of low-addressed physical memory
180: * to acquire for ISA bounce buffers. If physical memory below 16 MB
181: * then DMA_BOUNCE_LOW will be used.
182: *
183: * isaphysmem is the address of this physical contiguous low memory.
184: * isaphysmempgs is the number of pages allocated.
185: */
186:
187: #ifndef DMA_BOUNCE
188: #define DMA_BOUNCE 48 /* number of pages if memory > 16M */
189: #endif
190:
191: #ifndef DMA_BOUNCE_LOW
192: #define DMA_BOUNCE_LOW 16 /* number of pages if memory <= 16M */
193: #endif
194:
195: extern vaddr_t isaphysmem;
196: extern int isaphysmempgs;
197:
198:
199: /*
200: * Variables and macros to deal with the ISA I/O hole.
201: * XXX These should be converted to machine- and bus-mapping-independent
202: * function definitions, invoked through the softc.
203: */
204:
205: extern u_long atdevbase; /* kernel virtual address of "hole" */
206:
207: /*
208: * Given a kernel virtual address for some location
209: * in the "hole" I/O space, return a physical address.
210: */
211: #define ISA_PHYSADDR(v) ((void *) ((u_long)(v) - atdevbase + IOM_BEGIN))
212:
213: /*
214: * Given a physical address in the "hole",
215: * return a kernel virtual address.
216: */
217: #define ISA_HOLE_VADDR(p) ((void *) ((u_long)(p) - IOM_BEGIN + atdevbase))
218:
219: #endif /* _I386_ISA_MACHDEP_H_ XXX */
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