Annotation of sys/arch/hp300/hp300/leds.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: leds.c,v 1.8 2005/01/08 22:13:24 miod Exp $ */
! 2: /* $NetBSD: leds.c,v 1.1 1997/05/05 20:54:35 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1988 University of Utah.
! 6: * Copyright (c) 1982, 1986, 1990, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: *
! 9: * This code is derived from software contributed to Berkeley by
! 10: * the Systems Programming Group of the University of Utah Computer
! 11: * Science Department.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * from: Utah $Hdr: machdep.c 1.74 92/12/20$
! 38: *
! 39: * @(#)machdep.c 8.10 (Berkeley) 4/20/94
! 40: */
! 41:
! 42: #include <sys/param.h>
! 43:
! 44: #include <uvm/uvm_extern.h>
! 45:
! 46: #include <hp300/hp300/leds.h>
! 47:
! 48: extern caddr_t ledbase; /* kva of LED page */
! 49: u_int8_t *ledaddr; /* actual address of LEDs */
! 50: static int inledcontrol; /* mutex */
! 51:
! 52: /*
! 53: * Map the LED page and setup the KVA to access it.
! 54: */
! 55: void
! 56: ledinit()
! 57: {
! 58:
! 59: pmap_enter(pmap_kernel(), (vaddr_t)ledbase, (paddr_t)LED_ADDR,
! 60: VM_PROT_READ|VM_PROT_WRITE, VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
! 61: pmap_update(pmap_kernel());
! 62: ledaddr = (u_int8_t *) ((long)ledbase | (LED_ADDR & PGOFSET));
! 63: }
! 64:
! 65: /*
! 66: * Do lights:
! 67: * `ons' is a mask of LEDs to turn on,
! 68: * `offs' is a mask of LEDs to turn off,
! 69: * `togs' is a mask of LEDs to toggle.
! 70: * Note we don't use splclock/splx for mutual exclusion.
! 71: * They are expensive and we really don't need to be that precise.
! 72: * Besides we would like to be able to profile this routine.
! 73: */
! 74: void
! 75: ledcontrol(ons, offs, togs)
! 76: int ons, offs, togs;
! 77: {
! 78: static u_int8_t currentleds;
! 79: u_int8_t leds;
! 80:
! 81: if (inledcontrol)
! 82: return;
! 83:
! 84: inledcontrol = 1;
! 85: leds = currentleds;
! 86: if (ons)
! 87: leds |= ons;
! 88: if (offs)
! 89: leds &= ~offs;
! 90: if (togs)
! 91: leds ^= togs;
! 92: currentleds = leds;
! 93: *ledaddr = ~leds;
! 94: inledcontrol = 0;
! 95: }
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