/* $NetBSD: mvsoc_intr.c,v 1.9 2014/02/22 16:14:38 martin Exp $ */
/*
* Copyright (c) 2010 KIYOHARA Takashi
* All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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: mvsoc_intr.c,v 1.9 2014/02/22 16:14:38 martin Exp $");
#include "opt_mvsoc.h"
#define _INTR_PRIVATE
#include <sys/param.h>
#include <sys/proc.h>
#include <machine/intr.h>
#include <arm/armreg.h>
#include <arm/cpu.h>
#include <arm/pic/picvar.h>
#include <arm/marvell/mvsocreg.h>
#include <arm/marvell/mvsocvar.h>
int (*find_pending_irqs)(void);
static void mvsoc_bridge_pic_unblock_irqs(struct pic_softc *, size_t, uint32_t);
static void mvsoc_bridge_pic_block_irqs(struct pic_softc *, size_t, uint32_t);
static int mvsoc_bridge_pic_find_pending_irqs(struct pic_softc *);
static void mvsoc_bridge_pic_establish_irq(struct pic_softc *,
struct intrsource *);
static void mvsoc_bridge_pic_source_name(struct pic_softc *, int, char *,
size_t);
static const char * const sources[] = {
"CPUSelfInt", "CPUTimer0IntReq", "CPUTimer1IntReq", "CPUWDTimerIntReq",
"AccessErr", "Bit64Err",
};
static struct pic_ops mvsoc_bridge_picops = {
.pic_unblock_irqs = mvsoc_bridge_pic_unblock_irqs,
.pic_block_irqs = mvsoc_bridge_pic_block_irqs,
.pic_find_pending_irqs = mvsoc_bridge_pic_find_pending_irqs,
.pic_establish_irq = mvsoc_bridge_pic_establish_irq,
.pic_source_name = mvsoc_bridge_pic_source_name,
};
struct pic_softc mvsoc_bridge_pic = {
.pic_ops = &mvsoc_bridge_picops,
.pic_maxsources = MVSOC_MLMB_MLMBI_NIRQ,
.pic_name = "mvsoc_bridge",
};
void
mvsoc_irq_handler(void *frame)
{
struct cpu_info * const ci = curcpu();
const int oldipl = ci->ci_cpl;
const uint32_t oldipl_mask = __BIT(oldipl);
int ipl_mask = 0;
ci->ci_data.cpu_nintr++;
ipl_mask = find_pending_irqs();
/*
* Record the pending_ipls and deliver them if we can.
*/
if ((ipl_mask & ~oldipl_mask) > oldipl_mask)
pic_do_pending_ints(I32_bit, oldipl, frame);
}
/*
* Mbus-L to Mbus bridge
*/
void *
mvsoc_bridge_intr_establish(int ih, int ipl, int (*ih_func)(void *), void *arg)
{
return intr_establish(mvsoc_bridge_pic.pic_irqbase + ih, ipl,
IST_LEVEL_HIGH, ih_func, arg);
}
/* ARGSUSED */
static void
mvsoc_bridge_pic_unblock_irqs(struct pic_softc *pic, size_t irqbase,
uint32_t irq_mask)
{
write_mlmbreg(MVSOC_MLMB_MLMBICR,
read_mlmbreg(MVSOC_MLMB_MLMBICR) & ~irq_mask);
write_mlmbreg(MVSOC_MLMB_MLMBIMR,
read_mlmbreg(MVSOC_MLMB_MLMBIMR) | irq_mask);
}
/* ARGSUSED */
static void
mvsoc_bridge_pic_block_irqs(struct pic_softc *pic, size_t irqbase,
uint32_t irq_mask)
{
write_mlmbreg(MVSOC_MLMB_MLMBIMR,
read_mlmbreg(MVSOC_MLMB_MLMBIMR) & ~irq_mask);
}
static int
mvsoc_bridge_pic_find_pending_irqs(struct pic_softc *pic)
{
uint32_t pending;
pending =
read_mlmbreg(MVSOC_MLMB_MLMBICR) & read_mlmbreg(MVSOC_MLMB_MLMBIMR);
if (pending == 0)
return 0;
return pic_mark_pending_sources(pic, 0, pending);
}
/* ARGSUSED */
static void
mvsoc_bridge_pic_establish_irq(struct pic_softc *pic, struct intrsource *is)
{
/* Nothing */
}
static void
mvsoc_bridge_pic_source_name(struct pic_softc *pic, int irq, char *buf,
size_t len)
{
strlcpy(buf, sources[irq], len);
}