NetBSD/sys/arch/arm/xscale/i80200_icu.c

125 lines
3.3 KiB
C

/* $NetBSD: i80200_icu.c,v 1.5 2002/06/25 19:39:51 thorpej Exp $ */
/*
* Copyright (c) 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* Intel i80200 Interrupt Controller Unit support.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <arm/cpufunc.h>
#include <arm/xscale/i80200reg.h>
#include <arm/xscale/i80200var.h>
/* Software shadow copy of INTCTL. */
static __volatile uint32_t intctl;
/* Pointer to board-specific external IRQ dispatcher. */
void (*i80200_extirq_dispatch)(struct clockframe *);
static void
i80200_default_extirq_dispatch(struct clockframe *framep)
{
panic("external IRQ with no dispatch routine");
}
/*
* i80200_icu_init:
*
* Initialize the i80200 ICU.
*/
void
i80200_icu_init(void)
{
/* Disable all interrupt sources. */
intctl = 0;
__asm __volatile("mcr p13, 0, %0, c0, c0"
:
: "r" (intctl));
/* Steer PMU and BMU to IRQ. */
__asm __volatile("mcr p13, 0, %0, c8, c0"
:
: "r" (0));
i80200_extirq_dispatch = i80200_default_extirq_dispatch;
}
/*
* i80200_intr_enable:
*
* Enable an interrupt source in the i80200 ICU.
*/
void
i80200_intr_enable(uint32_t intr)
{
u_int oldirqstate;
oldirqstate = disable_interrupts(I32_bit|F32_bit);
intctl |= intr;
__asm __volatile("mcr p13, 0, %0, c0, c0"
:
: "r" (intctl));
restore_interrupts(oldirqstate);
}
/*
* i80200_intr_disable:
*
* Disable an interrupt source in the i80200 ICU.
*/
void
i80200_intr_disable(uint32_t intr)
{
u_int oldirqstate;
oldirqstate = disable_interrupts(I32_bit|F32_bit);
intctl &= ~intr;
__asm __volatile("mcr p13, 0, %0, c0, c0"
:
: "r" (intctl));
restore_interrupts(oldirqstate);
}