WebSVN – HelenOS – Diff – /trunk/kernel/arch/ppc32/src/interrupt.c


/*
 * Copyright (c) 2006 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */
 
/** @addtogroup ppc32interrupt
 * @{
 */
/** @file
 */
 
#include <ddi/irq.h>
#include <interrupt.h>
#include <arch/interrupt.h>
#include <arch/types.h>
#include <arch.h>
#include <time/clock.h>
#include <ipc/sysipc.h>
#include <arch/drivers/pic.h>
#include <arch/mm/tlb.h>
#include <print.h>
 
 
void start_decrementer(void)
{
    asm volatile (
        "mtdec %0\n"
        :
        : "r" (1000)
    );
}
 
 
/** Handler of external interrupts */
static void exception_external(int n, istate_t *istate)
{
    int inum;
   
    while ((inum = pic_get_pending()) != -1) {
 
        irq_t *irq = irq_dispatch_and_lock(inum);
        if (irq) {
            /*
             * The IRQ handler was found.
             */
           
            if (irq->preack) {
                /* Acknowledge the interrupt before processing */
                if (irq->cir)
                    irq->cir(irq->cir_arg, irq->inr);
            }
           
            irq->handler(irq);
           
            if (!irq->preack) {
                if (irq->cir)
                    irq->cir(irq->cir_arg, irq->inr);
            }
           
            spinlock_unlock(&irq->lock);
        } else {
            /*
             * Spurious interrupt.
             */
#ifdef CONFIG_DEBUG
            printf("cpu%u: spurious interrupt (inum=%d)\n", CPU->id, inum);
#endif
        }
 
 
 
    }
}
 
 
static void exception_decrementer(int n, istate_t *istate)
{
    start_decrementer();
    clock();
}
 
 
/* Initialize basic tables for exception dispatching */
void interrupt_init(void)
{
    exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill);
    exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill);
    exc_register(VECTOR_EXTERNAL, "external", exception_external);
    exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer);
}
 
/** @}
 */
 

Rev 3906	Rev 4311
1	/*	1	/*
2	* Copyright (c) 2006 Martin Decky	2	* Copyright (c) 2006 Martin Decky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup ppc32interrupt	29	/** @addtogroup ppc32interrupt
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <ddi/irq.h>	35	#include <ddi/irq.h>
36	#include <interrupt.h>	36	#include <interrupt.h>
37	#include <arch/interrupt.h>	37	#include <arch/interrupt.h>
38	#include <arch/types.h>	38	#include <arch/types.h>
39	#include <arch.h>	39	#include <arch.h>
40	#include <time/clock.h>	40	#include <time/clock.h>
41	#include <ipc/sysipc.h>	41	#include <ipc/sysipc.h>
42	#include <arch/drivers/pic.h>	42	#include <arch/drivers/pic.h>
43	#include <arch/mm/tlb.h>	43	#include <arch/mm/tlb.h>
44	#include <print.h>	44	#include <print.h>
45		45
46		46
47	void start_decrementer(void)	47	void start_decrementer(void)
48	{	48	{
49	asm volatile (	49	asm volatile (
50	"mtdec %0\n"	50	"mtdec %0\n"
51	:	51	:
52	: "r" (1000)	52	: "r" (1000)
53	);	53	);
54	}	54	}
55		55
56		56
57	/** Handler of external interrupts */	57	/** Handler of external interrupts */
58	static void exception_external(int n, istate_t *istate)	58	static void exception_external(int n, istate_t *istate)
59	{	59	{
60	int inum;	60	int inum;
61		61
62	while ((inum = pic_get_pending()) != -1) {	62	while ((inum = pic_get_pending()) != -1) {
63	bool ack = false;	-
64	irq_t *irq = irq_dispatch_and_lock(inum);	63	irq_t *irq = irq_dispatch_and_lock(inum);
65	if (irq) {	64	if (irq) {
66	/*	65	/*
67	* The IRQ handler was found.	66	* The IRQ handler was found.
68	*/	67	*/
69		68
70	if (irq->preack) {	69	if (irq->preack) {
71	/* Acknowledge the interrupt before processing */	70	/* Acknowledge the interrupt before processing */
72	pic_ack_interrupt(inum);	71	if (irq->cir)
73	ack = true;	72	irq->cir(irq->cir_arg, irq->inr);
74	}	73	}
75		74
76	irq->handler(irq);	75	irq->handler(irq);
-		76
-		77	if (!irq->preack) {
-		78	if (irq->cir)
-		79	irq->cir(irq->cir_arg, irq->inr);
-		80	}
-		81
77	spinlock_unlock(&irq->lock);	82	spinlock_unlock(&irq->lock);
78	} else {	83	} else {
79	/*	84	/*
80	* Spurious interrupt.	85	* Spurious interrupt.
81	*/	86	*/
82	#ifdef CONFIG_DEBUG	87	#ifdef CONFIG_DEBUG
83	printf("cpu%u: spurious interrupt (inum=%d)\n", CPU->id, inum);	88	printf("cpu%u: spurious interrupt (inum=%d)\n", CPU->id, inum);
84	#endif	89	#endif
85	}	90	}
86		-
87	if (!ack)	-
88	pic_ack_interrupt(inum);	-
89	}	91	}
90	}	92	}
91		93
92		94
93	static void exception_decrementer(int n, istate_t *istate)	95	static void exception_decrementer(int n, istate_t *istate)
94	{	96	{
95	start_decrementer();	97	start_decrementer();
96	clock();	98	clock();
97	}	99	}
98		100
99		101
100	/* Initialize basic tables for exception dispatching */	102	/* Initialize basic tables for exception dispatching */
101	void interrupt_init(void)	103	void interrupt_init(void)
102	{	104	{
103	exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill);	105	exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill);
104	exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill);	106	exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill);
105	exc_register(VECTOR_EXTERNAL, "external", exception_external);	107	exc_register(VECTOR_EXTERNAL, "external", exception_external);
106	exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer);	108	exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer);
107	}	109	}
108		110
109	/** @}	111	/** @}
110	*/	112	*/
111		113

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ppc32/src/interrupt.c @ 1928 – Rev 3906 → 4311