Home | History | Annotate | Line # | Download | only in bebox 
      1 /* $NetBSD: pic_bebox.c,v 1.12 2020/11/18 03:46:25 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Tim Rightnour
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: pic_bebox.c,v 1.12 2020/11/18 03:46:25 thorpej Exp $");
     34 
     35 #include "opt_multiprocessor.h"
     36 
     37 #include <sys/param.h>
     38 #include <sys/kmem.h>
     39 #include <sys/kernel.h>
     40 
     41 #include <uvm/uvm_extern.h>
     42 
     43 #include <machine/bebox.h>
     44 #include <machine/pio.h>
     45 
     46 #include <arch/powerpc/pic/picvar.h>
     47 
     48 
     49 static void bebox_enable_irq(struct pic_ops *, int, int);
     50 static void bebox_disable_irq(struct pic_ops *, int);
     51 static int bebox_get_irq(struct pic_ops *, int);
     52 static void bebox_ack_irq(struct pic_ops *, int);
     53 struct pic_ops * setup_bebox_intr(void);
     54 
     55 struct pic_ops *
     56 setup_bebox_intr(void)
     57 {
     58 	struct pic_ops *pic;
     59 
     60 	pic = kmem_alloc(sizeof(struct pic_ops), KM_SLEEP);
     61 	pic->pic_numintrs = 32;
     62 	pic->pic_cookie = (void *)BEBOX_REG;
     63 	pic->pic_enable_irq = bebox_enable_irq;
     64 	pic->pic_reenable_irq = bebox_enable_irq;
     65 	pic->pic_disable_irq = bebox_disable_irq;
     66 	pic->pic_get_irq = bebox_get_irq;
     67 	pic->pic_ack_irq = bebox_ack_irq;
     68 	pic->pic_establish_irq = dummy_pic_establish_intr;
     69 	strcpy(pic->pic_name, "bebox");
     70 	pic_add(pic);
     71 
     72 #ifdef MULTIPROCESSOR
     73 	setup_bebox_ipi();
     74 #endif
     75 
     76 	return(pic);
     77 }
     78 
     79 static void
     80 bebox_enable_irq(struct pic_ops *pic, int irq, int type)
     81 {
     82 
     83 	SET_BEBOX_REG(CPU0_INT_MASK, 1 << (31 - irq));
     84 }
     85 
     86 static void
     87 bebox_disable_irq(struct pic_ops *pic, int irq)
     88 {
     89 
     90 	CLEAR_BEBOX_REG(CPU0_INT_MASK, 1 << (31 - irq));
     91 }
     92 
     93 static int
     94 bebox_get_irq(struct pic_ops *pic, int mode)
     95 {
     96 	unsigned int state;
     97 
     98 	state = READ_BEBOX_REG(INT_SOURCE);
     99 	state &= BEBOX_INTR_MASK;
    100 	state &= READ_BEBOX_REG(CPU0_INT_MASK);
    101 	if (state == 0)
    102 		return 255;
    103 	return __builtin_clz(state);
    104 }
    105 
    106 static void
    107 bebox_ack_irq(struct pic_ops *pic, int irq)
    108 {
    109 	/* do nothing */
    110 }
    111