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/* $NetBSD: intr.h,v 1.19 2003/09/03 21:33:34 matt Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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 by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 _PREP_INTR_H_
#define _PREP_INTR_H_
/* Interrupt priority `levels'. */
#define IPL_NONE 9 /* nothing */
#define IPL_SOFTCLOCK 8 /* software clock interrupt */
#define IPL_SOFTNET 7 /* software network interrupt */
#define IPL_BIO 6 /* block I/O */
#define IPL_NET 5 /* network */
#define IPL_SOFTSERIAL 4 /* software serial interrupt */
#define IPL_TTY 3 /* terminal */
#define IPL_VM 3 /* memory allocation */
#define IPL_AUDIO 2 /* audio */
#define IPL_CLOCK 1 /* clock */
#define IPL_HIGH 1 /* everything */
#define IPL_SERIAL 0 /* serial */
#define NIPL 10
/* Interrupt sharing types. */
#define IST_NONE 0 /* none */
#define IST_PULSE 1 /* pulsed */
#define IST_EDGE 2 /* edge-triggered */
#define IST_LEVEL 3 /* level-triggered */
#ifndef _LOCORE
/*
* Interrupt handler chains. intr_establish() inserts a handler into
* the list. The handler is called with its (single) argument.
*/
struct intrhand {
int (*ih_fun)(void *);
void *ih_arg;
u_long ih_count;
struct intrhand *ih_next;
int ih_level;
int ih_irq;
};
void do_pending_int(void);
void init_intr(void);
void init_intr_ivr(void);
void init_intr_openpic(void);
void enable_intr(void);
void disable_intr(void);
void *intr_establish(int, int, int, int (*)(void *), void *);
void intr_disestablish(void *);
void softnet(int);
void softserial(void);
int isa_intr(void);
void isa_intr_mask(int);
void isa_intr_clr(int);
void isa_setirqstat(int, int, int);
static __inline int splraise(int);
static __inline void spllower(int);
static __inline void set_sint(int);
extern volatile int cpl, ipending, astpending, tickspending;
extern int imen;
extern int imask[];
extern long intrcnt[];
extern unsigned intrcnt2[];
extern struct intrhand *intrhand[];
extern int intrtype[];
extern vaddr_t prep_intr_reg;
/*
* Reorder protection in the following inline functions is
* achieved with the "eieio" instruction which the assembler
* seems to detect and then doesn't move instructions past....
*/
static __inline int
splraise(int newcpl)
{
int oldcpl;
__asm__ volatile("sync; eieio\n"); /* don't reorder.... */
oldcpl = cpl;
cpl = oldcpl | newcpl;
__asm__ volatile("sync; eieio\n"); /* reorder protect */
return(oldcpl);
}
static __inline void
spllower(int newcpl)
{
__asm__ volatile("sync; eieio\n"); /* reorder protect */
cpl = newcpl;
if(ipending & ~newcpl)
do_pending_int();
__asm__ volatile("sync; eieio\n"); /* reorder protect */
}
/* Following code should be implemented with lwarx/stwcx to avoid
* the disable/enable. i need to read the manual once more.... */
static __inline void
set_sint(int pending)
{
int msrsave;
__asm__ ("mfmsr %0" : "=r"(msrsave));
__asm__ volatile ("mtmsr %0" :: "r"(msrsave & ~PSL_EE));
ipending |= pending;
__asm__ volatile ("mtmsr %0" :: "r"(msrsave));
}
#define ICU_LEN 32
#define IRQ_SLAVE 2
#define LEGAL_IRQ(x) ((x) >= 0 && (x) < ICU_LEN && (x) != IRQ_SLAVE)
#define I8259_INTR_NUM 16
#define OPENPIC_INTR_NUM ((ICU_LEN)-(I8259_INTR_NUM))
#define CLKF_BASEPRI(frame) ((frame)->pri == 0)
#define PREP_INTR_REG 0xbffff000
#define INTR_VECTOR_REG 0xff0
#define SINT_CLOCK 0x20000000
#define SINT_NET 0x40000000
#define SINT_SERIAL 0x80000000
#define SPL_CLOCK 0x00000001
#define SINT_MASK (SINT_CLOCK|SINT_NET|SINT_SERIAL)
#define CNT_SINT_NET 29
#define CNT_SINT_CLOCK 30
#define CNT_SINT_SERIAL 31
#define CNT_CLOCK 0
#define splbio() splraise(imask[IPL_BIO])
#define splnet() splraise(imask[IPL_NET])
#define spltty() splraise(imask[IPL_TTY])
#define splclock() splraise(imask[IPL_CLOCK])
#define splvm() splraise(imask[IPL_VM])
#define splaudio() splraise(imask[IPL_AUDIO])
#define splserial() splraise(imask[IPL_SERIAL])
#define splstatclock() splclock()
#define spllowersoftclock() spllower(imask[IPL_SOFTCLOCK])
#define splsoftclock() splraise(imask[IPL_SOFTCLOCK])
#define splsoftnet() splraise(imask[IPL_SOFTNET])
#define splsoftserial() splraise(imask[IPL_SOFTSERIAL])
#define spllpt() spltty()
#define setsoftclock() set_sint(SINT_CLOCK);
#define setsoftnet() set_sint(SINT_NET);
#define setsoftserial() set_sint(SINT_SERIAL);
#define splhigh() splraise(imask[IPL_HIGH])
#define splsched() splhigh()
#define spllock() splhigh()
#define splx(x) spllower(x)
#define spl0() spllower(0)
#endif /* !_LOCORE */
#endif /* !_PREP_INTR_H_ */
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