212 lines
6.6 KiB
C
212 lines
6.6 KiB
C
/* $NetBSD: footbridge_intr.h,v 1.3 2002/11/11 20:44:41 chris Exp $ */
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/*
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* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FOOTBRIDGE_INTR_H_
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#define _FOOTBRIDGE_INTR_H_
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#include <arm/armreg.h>
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/* Define the various Interrupt Priority Levels */
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/* Hardware Interrupt Priority Levels are not mutually exclusive. */
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#define IPL_NONE 0 /* nothing */
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#define IPL_SOFT 1 /* generic soft interrupts */
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#define IPL_SOFTCLOCK 2 /* clock software interrupts */
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#define IPL_SOFTNET 3 /* network software interrupts */
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#define IPL_BIO 4 /* block I/O */
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#define IPL_NET 5 /* network */
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#define IPL_SOFTSERIAL 6 /* serial software interrupts */
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#define IPL_TTY 7 /* terminal */
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#define IPL_IMP 8 /* memory allocation */
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#define IPL_AUDIO 9 /* audio */
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#define IPL_CLOCK 10 /* clock */
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#define IPL_STATCLOCK 11 /* statclock */
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#define IPL_HIGH 12 /* everything */
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#define IPL_SERIAL 13 /* serial */
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#define NIPL 14
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#define IST_UNUSABLE -1 /* interrupt cannot be used */
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#define IST_NONE 0 /* none (dummy) */
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#define IST_PULSE 1 /* pulsed */
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#define IST_EDGE 2 /* edge-triggered */
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#define IST_LEVEL 3 /* level-triggered */
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#define __NEWINTR /* enables new hooks in cpu_fork()/cpu_switch() */
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#ifndef _LOCORE
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#include <arm/cpufunc.h>
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#include <arm/footbridge/dc21285mem.h>
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#include <arm/footbridge/dc21285reg.h>
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#define INT_SWMASK \
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((1U << IRQ_SOFTINT) | (1U << IRQ_RESERVED0) | \
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(1U << IRQ_RESERVED1) | (1U << IRQ_RESERVED2))
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#define ICU_INT_HWMASK (0xffffffff & ~(INT_SWMASK | (1U << IRQ_RESERVED3)))
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/* only call this with interrupts off */
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static __inline void __attribute__((__unused__))
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footbridge_set_intrmask(void)
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{
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extern __volatile uint32_t intr_enabled;
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/* fetch once so we write the same number to both registers */
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uint32_t tmp = intr_enabled & ICU_INT_HWMASK;
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((__volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_SET>>2] = tmp;
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((__volatile uint32_t*)(DC21285_ARMCSR_VBASE))[IRQ_ENABLE_CLEAR>>2] = ~tmp;
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}
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static __inline void __attribute__((__unused__))
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footbridge_splx(int newspl)
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{
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extern __volatile uint32_t intr_enabled;
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extern __volatile int current_spl_level;
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extern __volatile int footbridge_ipending;
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extern void footbridge_do_pending(void);
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int oldirqstate, hwpend;
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current_spl_level = newspl;
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hwpend = (footbridge_ipending & ICU_INT_HWMASK) & ~newspl;
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if (hwpend != 0) {
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oldirqstate = disable_interrupts(I32_bit);
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intr_enabled |= hwpend;
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footbridge_set_intrmask();
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restore_interrupts(oldirqstate);
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}
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if ((footbridge_ipending & INT_SWMASK) & ~newspl)
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footbridge_do_pending();
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}
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static __inline int __attribute__((__unused__))
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footbridge_splraise(int ipl)
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{
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extern __volatile int current_spl_level;
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extern int footbridge_imask[];
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int old;
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old = current_spl_level;
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current_spl_level |= footbridge_imask[ipl];
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return (old);
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}
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static __inline int __attribute__((__unused__))
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footbridge_spllower(int ipl)
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{
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extern __volatile int current_spl_level;
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extern int footbridge_imask[];
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int old = current_spl_level;
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footbridge_splx(footbridge_imask[ipl]);
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return(old);
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}
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/* should only be defined in footbridge_intr.c */
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#if !defined(ARM_SPL_NOINLINE)
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#define splx(newspl) footbridge_splx(newspl)
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#define _spllower(ipl) footbridge_spllower(ipl)
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#define _splraise(ipl) footbridge_splraise(ipl)
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void _setsoftintr(int);
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#else
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int _splraise(int);
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int _spllower(int);
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void splx(int);
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void _setsoftintr(int);
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#endif /* ! ARM_SPL_NOINLINE */
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#include <sys/device.h>
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#include <sys/queue.h>
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#include <machine/irqhandler.h>
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#define splsoft() _splraise(IPL_SOFT)
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#define splsoftclock() _splraise(IPL_SOFTCLOCK)
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#define splsoftnet() _splraise(IPL_SOFTNET)
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#define splbio() _splraise(IPL_BIO)
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#define splnet() _splraise(IPL_NET)
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#define splsoftserial() _splraise(IPL_SOFTSERIAL)
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#define spltty() _splraise(IPL_TTY)
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#define spllpt() spltty()
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#define splvm() _splraise(IPL_IMP)
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#define splaudio() _splraise(IPL_AUDIO)
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#define splclock() _splraise(IPL_CLOCK)
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#define splstatclock() _splraise(IPL_STATCLOCK)
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#define splhigh() _splraise(IPL_HIGH)
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#define splserial() _splraise(IPL_SERIAL)
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#define spl0() (void)_spllower(IPL_NONE)
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#define spllowersoftclock() (void)_spllower(IPL_SOFTCLOCK)
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#define splsched() splhigh()
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#define spllock() splhigh()
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/* Use generic software interrupt support. */
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#include <arm/softintr.h>
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/* footbridge has 32 interrupt lines */
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#define NIRQ 32
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struct intrhand {
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TAILQ_ENTRY(intrhand) ih_list; /* link on intrq list */
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int (*ih_func)(void *); /* handler */
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void *ih_arg; /* arg for handler */
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int ih_ipl; /* IPL_* */
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int ih_irq; /* IRQ number */
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};
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#define IRQNAMESIZE sizeof("footbridge irq 31")
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struct intrq {
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TAILQ_HEAD(, intrhand) iq_list; /* handler list */
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struct evcnt iq_ev; /* event counter */
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int iq_mask; /* IRQs to mask while handling */
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int iq_levels; /* IPL_*'s this IRQ has */
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int iq_ist; /* share type */
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char iq_name[IRQNAMESIZE]; /* interrupt name */
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};
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#endif /* _LOCORE */
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#endif /* _FOOTBRIDGE_INTR_H */
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