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i80200_icu.c revision 1.1 
      1 /*	$NetBSD: i80200_icu.c,v 1.1 2002/01/23 21:00:12 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2002 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * Intel i80200 Interrupt Controller Unit support.
     40  */
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 
     45 #include <arm/cpufunc.h>
     46 
     47 #include <arm/xscale/i80200reg.h>
     48 #include <arm/xscale/i80200var.h>
     49 
     50 /* Software shadow copy of INTCTL. */
     51 static uint32_t intctl;
     52 
     53 /*
     54  * i80200_intr_init:
     55  *
     56  *	Initialize the i80200 ICU.
     57  */
     58 void
     59 i80200_intr_init(void)
     60 {
     61 
     62 	/* Disable all interrupt sources. */
     63 	intctl = 0;
     64 	__asm __volatile("mcr p13, 0, %0, c0, c0"
     65 		:
     66 		: "r" (intctl));
     67 
     68 	/* Steer PMU and BMU to IRQ. */
     69 	__asm __volatile("mcr p13, 0, %0, c2, c0"
     70 		:
     71 		: "r" (0));
     72 }
     73 
     74 /*
     75  * i80200_intr_enable:
     76  *
     77  *	Enable an interrupt source in the i80200 ICU.
     78  */
     79 void
     80 i80200_intr_enable(uint32_t intr)
     81 {
     82 	u_int oldirqstate;
     83 
     84 	oldirqstate = disable_interrupts(I32_bit|F32_bit);
     85 
     86 	intctl |= intr;
     87 	__asm __volatile("mcr p13, 0, %0, c0, c0"
     88 		:
     89 		: "r" (intctl));
     90 
     91 	restore_interrupts(oldirqstate);
     92 }
     93 
     94 /*
     95  * i80200_intr_disable:
     96  *
     97  *	Disable an interrupt source in the i80200 ICU.
     98  */
     99 void
    100 i80200_intr_disable(uint32_t intr)
    101 {
    102 	u_int oldirqstate;
    103 
    104 	oldirqstate = disable_interrupts(I32_bit|F32_bit);
    105 
    106 	intctl &= ~intr;
    107 	__asm __volatile("mcr p13, 0, %0, c0, c0"
    108 		:
    109 		: "r" (intctl));
    110 
    111 	restore_interrupts(oldirqstate);
    112 }
    113