1 /* $NetBSD: leds.c,v 1.11 2002/03/15 05:55:38 gmcgarry Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 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 University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: machdep.c 1.74 92/12/20$ 41 * 42 * @(#)machdep.c 8.10 (Berkeley) 4/20/94 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: leds.c,v 1.11 2002/03/15 05:55:38 gmcgarry Exp $"); 47 48 #include <sys/param.h> 49 50 #include <uvm/uvm_extern.h> 51 52 #include <hp300/hp300/leds.h> 53 54 extern caddr_t ledbase; /* kva of LED page */ 55 u_int8_t *ledaddr; /* actual address of LEDs */ 56 static volatile u_int8_t currentleds; /* current LED status */ 57 58 /* 59 * Map the LED page and setup the KVA to access it. 60 */ 61 void 62 ledinit() 63 { 64 65 pmap_enter(pmap_kernel(), (vaddr_t)ledbase, (paddr_t)LED_ADDR, 66 VM_PROT_READ|VM_PROT_WRITE, VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED); 67 pmap_update(pmap_kernel()); 68 ledaddr = (u_int8_t *) ((long)ledbase | (LED_ADDR & PGOFSET)); 69 } 70 71 /* 72 * Do lights: 73 * `ons' is a mask of LEDs to turn on, 74 * `offs' is a mask of LEDs to turn off, 75 * `togs' is a mask of LEDs to toggle. 76 * Note that we don't use splclock/splx for mutual exclusion. They are 77 * expensive and we really don't need to be that precise. Besides, we 78 * would like to be able to profile this routine. 79 */ 80 void 81 ledcontrol(ons, offs, togs) 82 int ons, offs, togs; 83 { 84 85 __asm __volatile ( 86 "orb %1,%0 ;\n" 87 "andb %2,%0 ;\n" 88 "eorb %3,%0" 89 : "=m" (currentleds) 90 : "d" (ons), "d" (~offs), "d" (togs)); 91 *ledaddr = ~currentleds; 92 } 93