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1.1 root 1: /*
2: * Copyright (c) 1988 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)vbaparam.h 7.3 (Berkeley) 6/28/90
34: */
35:
36: /*
37: * Parameters related to the VERSAbus i/o configuration.
38: */
39:
40: /*
41: * VERSAbus i/o devices use either memory mapped interfaces
42: * or mapped i/o register banks, or some of both. Page tables
43: * are allocated at boot time by each device driver, as needed.
44: * VMEMmap is used to map a fixed size portion of the VERSAbus
45: * i/o space, while VMEMmap1 maps dynamically defined portions
46: * for devices which utilize shared i/o memory. VBmap is used
47: * for mapping kernel intermediate buffers for DMA devices which
48: * are incapable of utilizing user virtual addresses or which
49: * require page aligned i/o buffers. The size of the VMEMmap1
50: * VBmap tables must be large enough for the needs of all devices
51: * in the system.
52: */
53: extern struct pte VMEMmap[], VMEMmap1[];
54: extern caddr_t vmem1, vmemend;
55: extern struct pte VBmap[];
56: extern caddr_t vbbase, vbend;
57:
58: /*
59: * The following macros relate to the segmentation of the VERSAbus
60: * i/o space.
61: *
62: * The VERSAbus adapter segments the i/o space (as seen by the cpu)
63: * into three regions. Cpu accesses to the upper 64Kb of the i/o space
64: * generate VERSAbus cycles with a 16-bit address and a non-privileged
65: * short i/o space address modifier. Accesses to the next 1Mb - 64Kb
66: * generate 24-bit addresses and a non-privileged standard address
67: * modifier. Accesses to the remainder of the 1Gb i/o space generate
68: * 32-bit addresses with a non-privileged extended address modifier.
69: * Beware that 32-bit addresses generated from this region always have
70: * zero in the upper 2 bits; e.g. a reference to physical address fe000000
71: * results in a VERSAbus address of 3e000000.
72: */
73: #define VBIO16BIT(a) ((unsigned)0xfffe0000 <= ((unsigned)(a)))
74: #define VBIO24BIT(a) ((unsigned)0xff000000 <= ((unsigned)(a)) && \
75: ((unsigned)(a)) < (unsigned)0xfffe0000)
76: #define VBIO32BIT(a) (((unsigned)(a)) < (unsigned)0xff000000)
77:
78: /*
79: * The following constants define the fixed size map of the
80: * VERSAbus i/o space. The values should reflect the range
81: * of i/o addresses used by all the controllers unprepared
82: * to allocate and initialize their own page maps.
83: */
84: #define VBIOBASE 0xfff00000 /* base of VERSAbus address space */
85: #define VBIOEND 0xffffee45 /* last address in mapped space */
86: /* number of entries in the system page table for i/o space */
87: #define VBIOSIZE btoc(VBIOEND-VBIOBASE)
88: /* is device in mapped region */
89: #define VBIOMAPPED(a) ((unsigned)VBIOBASE <= ((unsigned)(a)) && \
90: ((unsigned)(a)) <= (unsigned)VBIOEND)
91: #define vboff(addr) ((int)(((caddr_t)(addr)) - VBIOBASE))
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