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/* $OpenBSD: footbridge_intr.h,v 1.4 2005/04/19 15:29:47 mickey Exp $ */
/* $NetBSD: footbridge_intr.h,v 1.4 2003/01/03 00:56:00 thorpej 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 _FOOTBRIDGE_INTR_H_
#define _FOOTBRIDGE_INTR_H_
#include <arm/armreg.h>
/* Define the various Interrupt Priority Levels */
/* Hardware Interrupt Priority Levels are not mutually exclusive. */
#define IPL_NONE 0 /* nothing */
#define IPL_SOFT 1 /* generic soft interrupts */
#define IPL_SOFTCLOCK 2 /* clock software interrupts */
#define IPL_SOFTNET 3 /* network software interrupts */
#define IPL_BIO 4 /* block I/O */
#define IPL_NET 5 /* network */
#define IPL_SOFTSERIAL 6 /* serial software interrupts */
#define IPL_TTY 7 /* terminal */
#define IPL_VM 8 /* memory allocation */
#define IPL_AUDIO 9 /* audio */
#define IPL_CLOCK 10 /* clock */
#define IPL_STATCLOCK 11 /* statclock */
#define IPL_HIGH 12 /* everything */
#define IPL_SERIAL 13 /* serial */
#define NIPL 14
#define IST_UNUSABLE -1 /* interrupt cannot be used */
#define IST_NONE 0 /* none (dummy) */
#define IST_PULSE 1 /* pulsed */
#define IST_EDGE 2 /* edge-triggered */
#define IST_LEVEL 3 /* level-triggered */
#define __NEWINTR /* enables new hooks in cpu_fork()/cpu_switch() */
#define ARM_IRQ_HANDLER _C_LABEL(footbridge_intr_dispatch)
#ifndef _LOCORE
#include <arm/cpufunc.h>
#include <sys/evcount.h>
#include <arm/footbridge/dc21285mem.h>
#include <arm/footbridge/dc21285reg.h>
#define INT_SWMASK \
((1U << IRQ_SOFTINT) | (1U << IRQ_RESERVED0) | \
(1U << IRQ_RESERVED1) | (1U << IRQ_RESERVED2))
#define ICU_INT_HWMASK (0xffffffff & ~(INT_SWMASK | (1U << IRQ_RESERVED3)))
/* only call this with interrupts off */
static __inline void __attribute__((__unused__))
footbridge_set_intrmask(void)
{
extern __volatile uint32_t intr_enabled;
/* fetch once so we write the same number to both registers */
uint32_t tmp = intr_enabled & ICU_INT_HWMASK;
((__volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_SET>>2] = tmp;
((__volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_CLEAR>>2] = ~tmp;
}
static __inline void __attribute__((__unused__))
footbridge_splx(int newspl)
{
extern __volatile uint32_t intr_enabled;
extern __volatile int current_spl_level;
extern __volatile int footbridge_ipending;
extern void footbridge_do_pending(void);
int oldirqstate, hwpend;
current_spl_level = newspl;
hwpend = (footbridge_ipending & ICU_INT_HWMASK) & ~newspl;
if (hwpend != 0) {
oldirqstate = disable_interrupts(I32_bit);
intr_enabled |= hwpend;
footbridge_set_intrmask();
restore_interrupts(oldirqstate);
}
if ((footbridge_ipending & INT_SWMASK) & ~newspl)
footbridge_do_pending();
}
static __inline int __attribute__((__unused__))
footbridge_splraise(int ipl)
{
extern __volatile int current_spl_level;
extern int footbridge_imask[];
int old;
old = current_spl_level;
current_spl_level |= footbridge_imask[ipl];
return (old);
}
static __inline int __attribute__((__unused__))
footbridge_spllower(int ipl)
{
extern __volatile int current_spl_level;
extern int footbridge_imask[];
int old = current_spl_level;
footbridge_splx(footbridge_imask[ipl]);
return(old);
}
/* should only be defined in footbridge_intr.c */
#if !defined(ARM_SPL_NOINLINE)
#define splx(newspl) footbridge_splx(newspl)
#define _spllower(ipl) footbridge_spllower(ipl)
#define _splraise(ipl) footbridge_splraise(ipl)
void _setsoftintr(int);
#else
int _splraise(int);
int _spllower(int);
void splx(int);
void _setsoftintr(int);
#endif /* ! ARM_SPL_NOINLINE */
#include <sys/device.h>
#include <sys/queue.h>
#include <machine/irqhandler.h>
#define splsoft() _splraise(IPL_SOFT)
#define splsoftclock() _splraise(IPL_SOFTCLOCK)
#define splsoftnet() _splraise(IPL_SOFTNET)
#define splbio() _splraise(IPL_BIO)
#define splnet() _splraise(IPL_NET)
#define splsoftserial() _splraise(IPL_SOFTSERIAL)
#define spltty() _splraise(IPL_TTY)
#define spllpt() spltty()
#define splvm() _splraise(IPL_VM)
#define splimp() _splraise(IPL_VM)
#define splaudio() _splraise(IPL_AUDIO)
#define splclock() _splraise(IPL_CLOCK)
#define splstatclock() _splraise(IPL_STATCLOCK)
#define splhigh() _splraise(IPL_HIGH)
#define splserial() _splraise(IPL_SERIAL)
#define spl0() (void)_spllower(IPL_NONE)
#define splsched() splhigh()
#define spllock() splhigh()
/* Use generic software interrupt support. */
#include <arm/softintr.h>
/* footbridge has 32 interrupt lines */
#define NIRQ 32
struct intrhand {
TAILQ_ENTRY(intrhand) ih_list; /* link on intrq list */
struct evcount ih_count; /* interrupt counter */
int (*ih_func)(void *); /* handler */
void *ih_arg; /* arg for handler */
int ih_ipl; /* IPL_* */
int ih_irq; /* IRQ number */
};
#define IRQNAMESIZE sizeof("footbridge irq 31")
struct intrq {
TAILQ_HEAD(, intrhand) iq_list; /* handler list */
int iq_mask; /* IRQs to mask while handling */
int iq_levels; /* IPL_*'s this IRQ has */
int iq_ist; /* share type */
};
#endif /* _LOCORE */
#endif /* _FOOTBRIDGE_INTR_H */
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