/* $NetBSD: pic_bebox.c,v 1.12 2020/11/18 03:46:25 thorpej Exp $ */

/*-
 * Copyright (c) 2007 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Tim Rightnour
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pic_bebox.c,v 1.12 2020/11/18 03:46:25 thorpej Exp $");

#include "opt_multiprocessor.h"

#include <sys/param.h>
#include <sys/kmem.h>
#include <sys/kernel.h>

#include <uvm/uvm_extern.h>

#include <machine/bebox.h>
#include <machine/pio.h>

#include <arch/powerpc/pic/picvar.h>


static void bebox_enable_irq(struct pic_ops *, int, int);
static void bebox_disable_irq(struct pic_ops *, int);
static int bebox_get_irq(struct pic_ops *, int);
static void bebox_ack_irq(struct pic_ops *, int);
struct pic_ops * setup_bebox_intr(void); 

struct pic_ops *
setup_bebox_intr(void)
{
        struct pic_ops *pic;

        pic = kmem_alloc(sizeof(struct pic_ops), KM_SLEEP);
        pic->pic_numintrs = 32;
        pic->pic_cookie = (void *)BEBOX_REG;
        pic->pic_enable_irq = bebox_enable_irq;
        pic->pic_reenable_irq = bebox_enable_irq;
        pic->pic_disable_irq = bebox_disable_irq;
        pic->pic_get_irq = bebox_get_irq;
        pic->pic_ack_irq = bebox_ack_irq;
        pic->pic_establish_irq = dummy_pic_establish_intr;
        strcpy(pic->pic_name, "bebox");
        pic_add(pic);

#ifdef MULTIPROCESSOR
        setup_bebox_ipi();
#endif

        return(pic);
}

static void
bebox_enable_irq(struct pic_ops *pic, int irq, int type)
{

        SET_BEBOX_REG(CPU0_INT_MASK, 1 << (31 - irq));
}

static void
bebox_disable_irq(struct pic_ops *pic, int irq)
{

        CLEAR_BEBOX_REG(CPU0_INT_MASK, 1 << (31 - irq));
}

static int
bebox_get_irq(struct pic_ops *pic, int mode)
{
        unsigned int state;

        state = READ_BEBOX_REG(INT_SOURCE);
        state &= BEBOX_INTR_MASK;
        state &= READ_BEBOX_REG(CPU0_INT_MASK);
        if (state == 0)
                return 255;
        return __builtin_clz(state);
}

static void
bebox_ack_irq(struct pic_ops *pic, int irq)
{
        /* do nothing */
}