mm_md.c revision 1.2
1 /* $NetBSD: mm_md.c,v 1.2 2011/06/12 03:35:47 rmind Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: @(#)mem.c 8.3 (Berkeley) 1/12/94 36 */ 37 38 /* 39 * Copyright (c) 1994, 1995 Gordon W. Ross 40 * Copyright (c) 1993 Adam Glass 41 * Copyright (c) 1988 University of Utah. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * the Systems Programming Group of the University of Utah Computer 45 * Science Department. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by the University of 58 * California, Berkeley and its contributors. 59 * 4. Neither the name of the University nor the names of its contributors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 * 75 * from: @(#)mem.c 8.3 (Berkeley) 1/12/94 76 */ 77 78 #include <sys/cdefs.h> 79 __KERNEL_RCSID(0, "$NetBSD: mm_md.c,v 1.2 2011/06/12 03:35:47 rmind Exp $"); 80 81 #include <sys/param.h> 82 #include <sys/errno.h> 83 #include <uvm/uvm_extern.h> 84 #include <machine/leds.h> 85 #include <machine/pmap.h> 86 #include <dev/mm.h> 87 88 #define DEV_VME16D16 5 /* minor device 5 is /dev/vme16d16 */ 89 #define DEV_VME24D16 6 /* minor device 6 is /dev/vme24d16 */ 90 #define DEV_EEPROM 11 /* minor device 11 is eeprom */ 91 #define DEV_LEDS 13 /* minor device 13 is leds */ 92 93 int 94 mm_md_physacc(paddr_t pa, vm_prot_t prot) 95 { 96 97 /* Allow access only in "managed" RAM. */ 98 if (pa < avail_start || pa >= avail_end) 99 return EFAULT; 100 return 0; 101 } 102 103 bool 104 mm_md_direct_mapped_phys(paddr_t paddr, vaddr_t *vaddr) 105 { 106 107 if (paddr >= avail_start) 108 return false; 109 *vaddr = paddr; 110 return true; 111 } 112 113 /* 114 * Allow access to the PROM mapping similiar to uvm_kernacc(). 115 */ 116 int 117 mm_md_kernacc(void *ptr, vm_prot_t prot, bool *handled) 118 { 119 120 if ((vaddr_t)ptr < SUN2_PROM_BASE || (vaddr_t)ptr > SUN2_MONEND) { 121 *handled = false; 122 return 0; 123 } 124 125 *handled = true; 126 /* Read in the PROM itself is OK, write not. */ 127 if ((prot & VM_PROT_WRITE) == 0) 128 return 0; 129 return EFAULT; 130 } 131 132 int 133 mm_md_readwrite(dev_t dev, struct uio *uio) 134 { 135 136 switch (minor(dev)) { 137 case DEV_LEDS: 138 return leds_uio(uio); 139 default: 140 return ENXIO; 141 } 142 } 143 144 paddr_t 145 mm_md_mmap(dev_t dev, off_t off, int prot) 146 { 147 148 switch (minor(dev)) { 149 case DEV_VME16D16: 150 if (off & 0xffff0000) 151 return -1; 152 off |= 0xff0000; 153 /* fall through */ 154 case DEV_VME24D16: 155 if (off & 0xff000000) 156 return -1; 157 return (off | (off & 0x800000 ? PMAP_VME8: PMAP_VME0)); 158 default: 159 return (-1); 160 } 161 } 162
Indexes created Wed Sep 24 02:09:48 GMT 2025