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freebsd/sys/i386/include/intr_machdep.h
John Baldwin 42f0ddd465 Tweak the ELCR support slightly. Explicitly probe the ELCR during boot
instead of burying that in the atpic(4) code as atpic(4) is not the only
user of elcr(4).  Change the elcr(4) code to export a global elcr_found
variable that other code can check to see if a valid ELCR was found.

MFC after:	1 month
2005-01-18 20:24:47 +00:00

109 lines
3.7 KiB
C

/*-
* Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef __MACHINE_INTR_MACHDEP_H__
#define __MACHINE_INTR_MACHDEP_H__
#ifdef _KERNEL
/* With I/O APIC's we can have up to 191 interrupts. */
#define NUM_IO_INTS 191
#define INTRCNT_COUNT (1 + NUM_IO_INTS * 2)
#ifndef LOCORE
typedef void inthand_t(u_int cs, u_int ef, u_int esp, u_int ss);
#define IDTVEC(name) __CONCAT(X,name)
struct intsrc;
/*
* Methods that a PIC provides to mask/unmask a given interrupt source,
* "turn on" the interrupt on the CPU side by setting up an IDT entry, and
* return the vector associated with this source.
*/
struct pic {
void (*pic_enable_source)(struct intsrc *);
void (*pic_disable_source)(struct intsrc *, int);
void (*pic_eoi_source)(struct intsrc *);
void (*pic_enable_intr)(struct intsrc *);
int (*pic_vector)(struct intsrc *);
int (*pic_source_pending)(struct intsrc *);
void (*pic_suspend)(struct intsrc *);
void (*pic_resume)(struct intsrc *);
int (*pic_config_intr)(struct intsrc *, enum intr_trigger,
enum intr_polarity);
};
/* Flags for pic_disable_source() */
enum {
PIC_EOI,
PIC_NO_EOI,
};
/*
* An interrupt source. The upper-layer code uses the PIC methods to
* control a given source. The lower-layer PIC drivers can store additional
* private data in a given interrupt source such as an interrupt pin number
* or an I/O APIC pointer.
*/
struct intsrc {
struct pic *is_pic;
struct ithd *is_ithread;
u_long *is_count;
u_long *is_straycount;
u_int is_index;
};
struct intrframe;
extern struct mtx icu_lock;
extern int elcr_found;
/* XXX: The elcr_* prototypes probably belong somewhere else. */
int elcr_probe(void);
enum intr_trigger elcr_read_trigger(u_int irq);
void elcr_resume(void);
void elcr_write_trigger(u_int irq, enum intr_trigger trigger);
int intr_add_handler(const char *name, int vector, driver_intr_t handler,
void *arg, enum intr_type flags, void **cookiep);
int intr_config_intr(int vector, enum intr_trigger trig,
enum intr_polarity pol);
void intr_execute_handlers(struct intsrc *isrc, struct intrframe *iframe);
struct intsrc *intr_lookup_source(int vector);
int intr_register_source(struct intsrc *isrc);
int intr_remove_handler(void *cookie);
void intr_resume(void);
void intr_suspend(void);
void intrcnt_add(const char *name, u_long **countp);
#endif /* !LOCORE */
#endif /* _KERNEL */
#endif /* !__MACHINE_INTR_MACHDEP_H__ */