Annotation of sys/arch/sparc64/sparc64/openprom.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: openprom.c,v 1.12 2007/08/10 14:25:08 fgsch Exp $ */
! 2: /* $NetBSD: openprom.c,v 1.4 2002/01/10 06:21:53 briggs Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1992, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This software was developed by the Computer Systems Engineering group
! 9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 10: * contributed to Berkeley.
! 11: *
! 12: * All advertising materials mentioning features or use of this software
! 13: * must display the following acknowledgement:
! 14: * This product includes software developed by the University of
! 15: * California, Lawrence Berkeley Laboratory.
! 16: *
! 17: * Redistribution and use in source and binary forms, with or without
! 18: * modification, are permitted provided that the following conditions
! 19: * are met:
! 20: * 1. Redistributions of source code must retain the above copyright
! 21: * notice, this list of conditions and the following disclaimer.
! 22: * 2. Redistributions in binary form must reproduce the above copyright
! 23: * notice, this list of conditions and the following disclaimer in the
! 24: * documentation and/or other materials provided with the distribution.
! 25: * 3. Neither the name of the University nor the names of its contributors
! 26: * may be used to endorse or promote products derived from this software
! 27: * without specific prior written permission.
! 28: *
! 29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 39: * SUCH DAMAGE.
! 40: *
! 41: * @(#)openprom.c 8.1 (Berkeley) 6/11/93
! 42: */
! 43:
! 44: #include <sys/param.h>
! 45: #include <sys/systm.h>
! 46: #include <sys/errno.h>
! 47: #include <sys/fcntl.h>
! 48: #include <sys/ioctl.h>
! 49: #include <sys/malloc.h>
! 50: #include <sys/conf.h>
! 51: #include <sys/device.h>
! 52:
! 53: #include <machine/bsd_openprom.h>
! 54: #include <machine/openpromio.h>
! 55: #include <machine/autoconf.h>
! 56: #include <machine/conf.h>
! 57:
! 58: #include <dev/ofw/openfirm.h>
! 59:
! 60: #define OPROMMAXPARAM 32
! 61:
! 62: static int lastnode; /* speed hack */
! 63: extern int optionsnode; /* node ID of ROM's options */
! 64:
! 65: static int openpromcheckid(int, int);
! 66: static int openpromgetstr(int, char *, char **);
! 67:
! 68: int
! 69: openpromopen(dev, flags, mode, p)
! 70: dev_t dev;
! 71: int flags, mode;
! 72: struct proc *p;
! 73: {
! 74:
! 75: return (0);
! 76: }
! 77:
! 78: int
! 79: openpromclose(dev, flags, mode, p)
! 80: dev_t dev;
! 81: int flags, mode;
! 82: struct proc *p;
! 83: {
! 84:
! 85: return (0);
! 86: }
! 87:
! 88: /*
! 89: * Verify target ID is valid (exists in the OPENPROM tree), as
! 90: * listed from node ID sid forward.
! 91: */
! 92: static int
! 93: openpromcheckid(sid, tid)
! 94: int sid, tid;
! 95: {
! 96: for (; sid != 0; sid = OF_peer(sid))
! 97: if (sid == tid || openpromcheckid(OF_child(sid), tid))
! 98: return (1);
! 99:
! 100: return (0);
! 101: }
! 102:
! 103: static int
! 104: openpromgetstr(len, user, cpp)
! 105: int len;
! 106: char *user, **cpp;
! 107: {
! 108: int error;
! 109: char *cp;
! 110:
! 111: /* Reject obvious bogus requests */
! 112: if ((u_int)len > (8 * 1024) - 1)
! 113: return (ENAMETOOLONG);
! 114:
! 115: *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK);
! 116: error = copyin(user, cp, len);
! 117: cp[len] = '\0';
! 118: return (error);
! 119: }
! 120:
! 121: int
! 122: openpromioctl(dev, cmd, data, flags, p)
! 123: dev_t dev;
! 124: u_long cmd;
! 125: caddr_t data;
! 126: int flags;
! 127: struct proc *p;
! 128: {
! 129: struct opiocdesc *op;
! 130: int node, len, ok, error, s;
! 131: char *name, *value, *nextprop;
! 132:
! 133: /* All too easy... */
! 134: if (cmd == OPIOCGETOPTNODE) {
! 135: *(int *)data = optionsnode;
! 136: return (0);
! 137: }
! 138:
! 139: /* Verify node id */
! 140: op = (struct opiocdesc *)data;
! 141: node = op->op_nodeid;
! 142: if (node != 0 && node != lastnode && node != optionsnode) {
! 143: /* Not an easy one, must search for it */
! 144: s = splhigh();
! 145: ok = openpromcheckid(findroot(), node);
! 146: splx(s);
! 147: if (!ok)
! 148: return (EINVAL);
! 149: lastnode = node;
! 150: }
! 151:
! 152: name = value = NULL;
! 153: error = 0;
! 154: switch (cmd) {
! 155:
! 156: case OPIOCGET:
! 157: if ((flags & FREAD) == 0)
! 158: return (EBADF);
! 159: if (node == 0)
! 160: return (EINVAL);
! 161: error = openpromgetstr(op->op_namelen, op->op_name, &name);
! 162: if (error)
! 163: break;
! 164: s = splhigh();
! 165: len = getproplen(node, name);
! 166: splx(s);
! 167: if (len > op->op_buflen) {
! 168: error = ENOMEM;
! 169: break;
! 170: }
! 171: op->op_buflen = len;
! 172: /* -1 means no entry; 0 means no value */
! 173: if (len <= 0)
! 174: break;
! 175: value = malloc(len, M_TEMP, M_WAITOK);
! 176: s = splhigh();
! 177: error = getprop(node, name, 1, &len, (void **)&value);
! 178: splx(s);
! 179: if (error != 0)
! 180: break;
! 181: error = copyout(value, op->op_buf, len);
! 182: break;
! 183:
! 184: case OPIOCSET:
! 185: if ((flags & FWRITE) == 0)
! 186: return (EBADF);
! 187: if (node == 0)
! 188: return (EINVAL);
! 189: error = openpromgetstr(op->op_namelen, op->op_name, &name);
! 190: if (error)
! 191: break;
! 192: error = openpromgetstr(op->op_buflen, op->op_buf, &value);
! 193: if (error)
! 194: break;
! 195: s = splhigh();
! 196: len = OF_setprop(node, name, value, op->op_buflen + 1);
! 197: splx(s);
! 198: if (len != op->op_buflen)
! 199: error = EINVAL;
! 200: break;
! 201:
! 202: case OPIOCNEXTPROP:
! 203: if ((flags & FREAD) == 0)
! 204: return (EBADF);
! 205: if (node == 0)
! 206: return (EINVAL);
! 207: error = openpromgetstr(op->op_namelen, op->op_name, &name);
! 208: if (error)
! 209: break;
! 210: if (op->op_buflen <= 0) {
! 211: error = ENAMETOOLONG;
! 212: break;
! 213: }
! 214: value = nextprop = malloc(OPROMMAXPARAM, M_TEMP, M_WAITOK);
! 215: if (nextprop == NULL) {
! 216: error = ENOMEM;
! 217: break;
! 218: }
! 219: s = splhigh();
! 220: error = OF_nextprop(node, name, nextprop);
! 221: splx(s);
! 222: if (error == -1) {
! 223: error = EINVAL;
! 224: break;
! 225: }
! 226: if (error == 0) {
! 227: char nul = '\0';
! 228:
! 229: op->op_buflen = 0;
! 230: error = copyout(&nul, op->op_buf, sizeof(char));
! 231: break;
! 232: }
! 233: len = strlen(nextprop);
! 234: if (len > op->op_buflen)
! 235: len = op->op_buflen;
! 236: else
! 237: op->op_buflen = len;
! 238: error = copyout(nextprop, op->op_buf, len);
! 239: break;
! 240:
! 241: case OPIOCGETNEXT:
! 242: if ((flags & FREAD) == 0)
! 243: return (EBADF);
! 244: s = splhigh();
! 245: node = nextsibling(node);
! 246: splx(s);
! 247: *(int *)data = lastnode = node;
! 248: break;
! 249:
! 250: case OPIOCGETCHILD:
! 251: if ((flags & FREAD) == 0)
! 252: return (EBADF);
! 253: if (node == 0)
! 254: return (EINVAL);
! 255: s = splhigh();
! 256: node = firstchild(node);
! 257: splx(s);
! 258: *(int *)data = lastnode = node;
! 259: break;
! 260:
! 261: default:
! 262: return (ENOTTY);
! 263: }
! 264:
! 265: if (name)
! 266: free(name, M_TEMP);
! 267: if (value)
! 268: free(value, M_TEMP);
! 269:
! 270: return (error);
! 271: }
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