/*      $NetBSD: leds.c,v 1.20 2011/02/08 20:20:13 rmind Exp $  */

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
*
* from: Utah $Hdr: machdep.c 1.74 92/12/20$
*
*      @(#)machdep.c   8.10 (Berkeley) 4/20/94
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: leds.c,v 1.20 2011/02/08 20:20:13 rmind Exp $");

#include <sys/param.h>

#include <uvm/uvm_extern.h>

#include <hp300/hp300/leds.h>

static vaddr_t  ledbase;        /* kva of LED page */
uint8_t         *ledaddr;       /* actual address of LEDs */
static volatile uint8_t currentleds; /* current LED status */

/*
* Map the LED page and setup the KVA to access it.
*/
void
ledinit(void)
{

       ledbase = uvm_km_alloc(kernel_map, PAGE_SIZE, 0, UVM_KMF_VAONLY);
       pmap_enter(pmap_kernel(), ledbase, (paddr_t)LED_ADDR,
           VM_PROT_READ|VM_PROT_WRITE, VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
       pmap_update(pmap_kernel());
       ledaddr = (uint8_t *)(ledbase | (LED_ADDR & PGOFSET));
}

/*
* Do lights:
*      `ons' is a mask of LEDs to turn on,
*      `offs' is a mask of LEDs to turn off,
*      `togs' is a mask of LEDs to toggle.
* Note that we don't use splclock/splx for mutual exclusion.  They are
* expensive and we really don't need to be that precise.  Besides, we
* would like to be able to profile this routine.
*/
void
ledcontrol(int ons, int offs, int togs)
{

       __asm volatile (
               "orb    %1,%0   ;\n"
               "andb   %2,%0   ;\n"
               "eorb   %3,%0"
           : "=m" (currentleds)
           : "d" (ons), "d" (~offs), "d" (togs));
       *ledaddr = ~currentleds;
}