* Copyright (c) 2001, 2002 Wasabi Systems, Inc.

/* $NetBSD: ifpga_intr.h,v 1.9 2009/02/13 21:08:40 he Exp $ */

/*
* Copyright (c) 2001, 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.
*/

#ifndef _IFPGA_INTR_H_
#define _IFPGA_INTR_H_

#define ARM_IRQ_HANDLER _C_LABEL(ifpga_intr_dispatch)

#ifndef _LOCORE

#include <arm/cpu.h>
#include <arm/armreg.h>
#include <arm/cpufunc.h>

#include <evbarm/ifpga/ifpgareg.h>
#include <evbarm/ifpga/ifpgavar.h>

static inline void __attribute__((__unused__))
ifpga_set_intrmask(void)
{
extern volatile uint32_t intr_enabled;
extern struct ifpga_softc *ifpga_sc;
uint32_t mask = intr_enabled;

bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
IFPGA_INTR_ENABLECLR, ~mask);
bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
IFPGA_INTR_ENABLESET, mask);
}

static inline void __attribute__((__unused__))
ifpga_splx(int new)
{
extern volatile uint32_t intr_enabled;
extern volatile int ifpga_ipending;
int oldirqstate, hwpend;

__insn_barrier();

oldirqstate = disable_interrupts(I32_bit);
set_curcpl(new);

hwpend = (ifpga_ipending & IFPGA_INTR_HWMASK) & ~new;
if (hwpend != 0) {
intr_enabled |= hwpend;
ifpga_set_intrmask();
}

restore_interrupts(oldirqstate);

#ifdef __HAVE_FAST_SOFTINTS
cpu_dosoftints();
#endif
}

static inline int __attribute__((__unused__))
ifpga_splraise(int ipl)
{
extern int ifpga_imask[];
const int old = curcpl();
set_curcpl(old | ifpga_imask[ipl]);

__insn_barrier();

return (old);
}

static inline int __attribute__((__unused__))
ifpga_spllower(int ipl)
{
extern int ifpga_imask[];
const int old = curcpl();

ifpga_splx(ifpga_imask[ipl]);
return(old);
}

#if !defined(EVBARM_SPL_NOINLINE)

#define splx(new) ifpga_splx(new)
#define _spllower(ipl) ifpga_spllower(ipl)
#define _splraise(ipl) ifpga_splraise(ipl)

#else

int _splraise(int);
int _spllower(int);
void splx(int);

#endif /* ! EVBARM_SPL_NOINLINE */

#endif /* _LOCORE */

#endif /* _IFPGA_INTR_H_ */