/* $OpenBSD: openprom.c,v 1.6 2014/07/12 18:44:43 tedu Exp $ */ /* $NetBSD: openprom.c,v 1.8 1996/03/31 23:45:34 pk Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)openprom.c 8.1 (Berkeley) 6/11/93 */ #include #include #include #include #include #include #include #include #include #include #include static int lastnode; /* speed hack */ extern int optionsnode; /* node ID of ROM's options */ extern struct promvec *promvec; static int openpromcheckid(int, int); static int openpromgetstr(int, char *, char **); int openpromopen(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { #if defined(SUN4) if (cputyp==CPU_SUN4) return (ENODEV); #endif return (0); } int openpromclose(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { return (0); } /* * Verify target ID is valid (exists in the OPENPROM tree), as * listed from node ID sid forward. */ static int openpromcheckid(sid, tid) register int sid, tid; { register struct nodeops *no; no = promvec->pv_nodeops; for (; sid != 0; sid = no->no_nextnode(sid)) if (sid == tid || openpromcheckid(no->no_child(sid), tid)) return (1); return (0); } static int openpromgetstr(len, user, cpp) int len; char *user, **cpp; { register int error; register char *cp; /* Reject obvious bogus requests */ if ((u_int)len > (8 * 1024) - 1) return (ENAMETOOLONG); *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK); error = copyin(user, cp, len); cp[len] = '\0'; return (error); } int openpromioctl(dev, cmd, data, flags, p) dev_t dev; u_long cmd; caddr_t data; int flags; struct proc *p; { register struct opiocdesc *op; register int node, len, ok, error, s; char *name, *value, *nextprop; register struct nodeops *no; /* All too easy... */ if (cmd == OPIOCGETOPTNODE) { *(int *)data = optionsnode; return (0); } /* Verify node id */ op = (struct opiocdesc *)data; node = op->op_nodeid; if (node != 0 && node != lastnode && node != optionsnode) { /* Not an easy one, must search for it */ s = splhigh(); ok = openpromcheckid(findroot(), node); splx(s); if (!ok) return (EINVAL); lastnode = node; } name = value = NULL; no = promvec->pv_nodeops; error = 0; switch (cmd) { case OPIOCGET: if ((flags & FREAD) == 0) return (EBADF); if (node == 0) return (EINVAL); error = openpromgetstr(op->op_namelen, op->op_name, &name); if (error) break; s = splhigh(); len = no->no_proplen(node, name); splx(s); if (len > op->op_buflen) { error = ENOMEM; break; } op->op_buflen = len; /* -1 means no entry; 0 means no value */ if (len <= 0) break; value = malloc(len, M_TEMP, M_WAITOK); s = splhigh(); (void)no->no_getprop(node, name, value); splx(s); error = copyout(value, op->op_buf, len); break; case OPIOCSET: if ((flags & FWRITE) == 0) return (EBADF); if (node == 0) return (EINVAL); error = openpromgetstr(op->op_namelen, op->op_name, &name); if (error) break; error = openpromgetstr(op->op_buflen, op->op_buf, &value); if (error) break; s = splhigh(); len = no->no_setprop(node, name, value, op->op_buflen + 1); splx(s); if (len != op->op_buflen) error = EINVAL; break; case OPIOCNEXTPROP: if ((flags & FREAD) == 0) return (EBADF); if (node == 0) return (EINVAL); error = openpromgetstr(op->op_namelen, op->op_name, &name); if (error) break; s = splhigh(); nextprop = no->no_nextprop(node, name); splx(s); len = strlen(nextprop); if (len > op->op_buflen) len = op->op_buflen; else op->op_buflen = len; error = copyout(nextprop, op->op_buf, len); break; case OPIOCGETNEXT: if ((flags & FREAD) == 0) return (EBADF); s = splhigh(); node = no->no_nextnode(node); splx(s); *(int *)data = lastnode = node; break; case OPIOCGETCHILD: if ((flags & FREAD) == 0) return (EBADF); if (node == 0) return (EINVAL); s = splhigh(); node = no->no_child(node); splx(s); *(int *)data = lastnode = node; break; default: return (ENOTTY); } if (name) free(name, M_TEMP, 0); if (value) free(value, M_TEMP, 0); return (error); }