[deliverable/linux.git] / arch / m68knommu / platform / 68360 / ints.c

/*
 * linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 *
 * Copyright (c) 2000  Michael Leslie <mleslie@lineo.com>
 * Copyright (c) 1996 Roman Zippel
 * Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.org>
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/m68360.h>

/* from quicc/commproc.c: */
extern QUICC *pquicc;
extern void cpm_interrupt_init(void);

#define INTERNAL_IRQS (96)

/* assembler routines */
asmlinkage void system_call(void);
asmlinkage void buserr(void);
asmlinkage void trap(void);
asmlinkage void bad_interrupt(void);
asmlinkage void inthandler(void);

extern void *_ramvec[];

/* The number of spurious interrupts */
volatile unsigned int num_spurious;

static void intc_irq_unmask(unsigned int irq)
{
	pquicc->intr_cimr |= (1 << irq);
}

static void intc_irq_mask(unsigned int irq)
{
	pquicc->intr_cimr &= ~(1 << irq);
}

static void intc_irq_ack(unsigned int irq)
{
	pquicc->intr_cisr = (1 << irq);
}

static struct irq_chip intc_irq_chip = {
	.name		= "M68K-INTC",
	.mask		= intc_irq_mask,
	.unmask		= intc_irq_unmask,
	.ack		= intc_irq_ack,
};

/*
 * This function should be called during kernel startup to initialize
 * the vector table.
 */
void init_IRQ(void)
{
	int i;
	int vba = (CPM_VECTOR_BASE<<4);

	/* set up the vectors */
	_ramvec[2] = buserr;
	_ramvec[3] = trap;
	_ramvec[4] = trap;
	_ramvec[5] = trap;
	_ramvec[6] = trap;
	_ramvec[7] = trap;
	_ramvec[8] = trap;
	_ramvec[9] = trap;
	_ramvec[10] = trap;
	_ramvec[11] = trap;
	_ramvec[12] = trap;
	_ramvec[13] = trap;
	_ramvec[14] = trap;
	_ramvec[15] = trap;

	_ramvec[32] = system_call;
	_ramvec[33] = trap;

	cpm_interrupt_init();

	/* set up CICR for vector base address and irq level */
	/* irl = 4, hp = 1f - see MC68360UM p 7-377 */
	pquicc->intr_cicr = 0x00e49f00 | vba;

	/* CPM interrupt vectors: (p 7-376) */
	_ramvec[vba+CPMVEC_ERROR]       = bad_interrupt; /* Error */
	_ramvec[vba+CPMVEC_PIO_PC11]    = inthandler;   /* pio - pc11 */
	_ramvec[vba+CPMVEC_PIO_PC10]    = inthandler;   /* pio - pc10 */
	_ramvec[vba+CPMVEC_SMC2]        = inthandler;   /* smc2/pip */
	_ramvec[vba+CPMVEC_SMC1]        = inthandler;   /* smc1 */
	_ramvec[vba+CPMVEC_SPI]         = inthandler;   /* spi */
	_ramvec[vba+CPMVEC_PIO_PC9]     = inthandler;   /* pio - pc9 */
	_ramvec[vba+CPMVEC_TIMER4]      = inthandler;   /* timer 4 */
	_ramvec[vba+CPMVEC_RESERVED1]   = inthandler;   /* reserved */
	_ramvec[vba+CPMVEC_PIO_PC8]     = inthandler;   /* pio - pc8 */
	_ramvec[vba+CPMVEC_PIO_PC7]     = inthandler;  /* pio - pc7 */
	_ramvec[vba+CPMVEC_PIO_PC6]     = inthandler;  /* pio - pc6 */
	_ramvec[vba+CPMVEC_TIMER3]      = inthandler;  /* timer 3 */
	_ramvec[vba+CPMVEC_PIO_PC5]     = inthandler;  /* pio - pc5 */
	_ramvec[vba+CPMVEC_PIO_PC4]     = inthandler;  /* pio - pc4 */
	_ramvec[vba+CPMVEC_RESERVED2]   = inthandler;  /* reserved */
	_ramvec[vba+CPMVEC_RISCTIMER]   = inthandler;  /* timer table */
	_ramvec[vba+CPMVEC_TIMER2]      = inthandler;  /* timer 2 */
	_ramvec[vba+CPMVEC_RESERVED3]   = inthandler;  /* reserved */
	_ramvec[vba+CPMVEC_IDMA2]       = inthandler;  /* idma 2 */
	_ramvec[vba+CPMVEC_IDMA1]       = inthandler;  /* idma 1 */
	_ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler;  /* sdma channel bus error */
	_ramvec[vba+CPMVEC_PIO_PC3]     = inthandler;  /* pio - pc3 */
	_ramvec[vba+CPMVEC_PIO_PC2]     = inthandler;  /* pio - pc2 */
	/* _ramvec[vba+CPMVEC_TIMER1]      = cpm_isr_timer1; */  /* timer 1 */
	_ramvec[vba+CPMVEC_TIMER1]      = inthandler;  /* timer 1 */
	_ramvec[vba+CPMVEC_PIO_PC1]     = inthandler;  /* pio - pc1 */
	_ramvec[vba+CPMVEC_SCC4]        = inthandler;  /* scc 4 */
	_ramvec[vba+CPMVEC_SCC3]        = inthandler;  /* scc 3 */
	_ramvec[vba+CPMVEC_SCC2]        = inthandler;  /* scc 2 */
	_ramvec[vba+CPMVEC_SCC1]        = inthandler;  /* scc 1 */
	_ramvec[vba+CPMVEC_PIO_PC0]     = inthandler;  /* pio - pc0 */


	/* turn off all CPM interrupts */
	pquicc->intr_cimr = 0x00000000;

	for (i = 0; (i < NR_IRQS); i++) {
		set_irq_chip(i, &intc_irq_chip);
		set_irq_handler(i, handle_level_irq);
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
	3	*
	4	* This file is subject to the terms and conditions of the GNU General Public
	5	* License. See the file COPYING in the main directory of this archive
	6	* for more details.
	7	*
	8	* Copyright (c) 2000 Michael Leslie <mleslie@lineo.com>
	9	* Copyright (c) 1996 Roman Zippel
	10	* Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.org>
	11	*/
	12
1da177e4 LT	13	#include <linux/types.h>
1da177e4 LT	14	#include <linux/kernel.h>
2502b667 GU	15	#include <linux/init.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/irq.h>
1da177e4	18	#include <asm/traps.h>
1da177e4	19	#include <asm/machdep.h>
1da177e4 LT	20	#include <asm/m68360.h>
	21
	22	/* from quicc/commproc.c: */
	23	extern QUICC *pquicc;
	24	extern void cpm_interrupt_init(void);
	25
	26	#define INTERNAL_IRQS (96)
	27
	28	/* assembler routines */
	29	asmlinkage void system_call(void);
	30	asmlinkage void buserr(void);
	31	asmlinkage void trap(void);
2502b667 GU	32	asmlinkage void bad_interrupt(void);
2502b667 GU	33	asmlinkage void inthandler(void);
1da177e4 LT	34
	35	extern void *_ramvec[];
	36
	37	/* The number of spurious interrupts */
	38	volatile unsigned int num_spurious;
1da177e4	39
0531d7b3 GU	40	static void intc_irq_unmask(unsigned int irq)
	41	{
	42	pquicc->intr_cimr \|= (1 << irq);
	43	}
	44
	45	static void intc_irq_mask(unsigned int irq)
	46	{
	47	pquicc->intr_cimr &= ~(1 << irq);
	48	}
	49
	50	static void intc_irq_ack(unsigned int irq)
	51	{
	52	pquicc->intr_cisr = (1 << irq);
	53	}
	54
	55	static struct irq_chip intc_irq_chip = {
	56	.name = "M68K-INTC",
	57	.mask = intc_irq_mask,
	58	.unmask = intc_irq_unmask,
	59	.ack = intc_irq_ack,
	60	};
	61
1da177e4 LT	62	/*
1da177e4 LT	63	* This function should be called during kernel startup to initialize
2502b667	64	* the vector table.
1da177e4	65	*/
0531d7b3	66	void init_IRQ(void)
1da177e4 LT	67	{
	68	int i;
	69	int vba = (CPM_VECTOR_BASE<<4);
	70
	71	/* set up the vectors */
	72	_ramvec[2] = buserr;
	73	_ramvec[3] = trap;
	74	_ramvec[4] = trap;
	75	_ramvec[5] = trap;
	76	_ramvec[6] = trap;
	77	_ramvec[7] = trap;
	78	_ramvec[8] = trap;
	79	_ramvec[9] = trap;
	80	_ramvec[10] = trap;
	81	_ramvec[11] = trap;
	82	_ramvec[12] = trap;
	83	_ramvec[13] = trap;
	84	_ramvec[14] = trap;
	85	_ramvec[15] = trap;
	86
	87	_ramvec[32] = system_call;
	88	_ramvec[33] = trap;
	89
1da177e4 LT	90	cpm_interrupt_init();
	91
	92	/* set up CICR for vector base address and irq level */
	93	/* irl = 4, hp = 1f - see MC68360UM p 7-377 */
	94	pquicc->intr_cicr = 0x00e49f00 \| vba;
	95
	96	/* CPM interrupt vectors: (p 7-376) */
	97	_ramvec[vba+CPMVEC_ERROR] = bad_interrupt; /* Error */
	98	_ramvec[vba+CPMVEC_PIO_PC11] = inthandler; /* pio - pc11 */
	99	_ramvec[vba+CPMVEC_PIO_PC10] = inthandler; /* pio - pc10 */
	100	_ramvec[vba+CPMVEC_SMC2] = inthandler; /* smc2/pip */
	101	_ramvec[vba+CPMVEC_SMC1] = inthandler; /* smc1 */
	102	_ramvec[vba+CPMVEC_SPI] = inthandler; /* spi */
	103	_ramvec[vba+CPMVEC_PIO_PC9] = inthandler; /* pio - pc9 */
	104	_ramvec[vba+CPMVEC_TIMER4] = inthandler; /* timer 4 */
	105	_ramvec[vba+CPMVEC_RESERVED1] = inthandler; /* reserved */
	106	_ramvec[vba+CPMVEC_PIO_PC8] = inthandler; /* pio - pc8 */
	107	_ramvec[vba+CPMVEC_PIO_PC7] = inthandler; /* pio - pc7 */
	108	_ramvec[vba+CPMVEC_PIO_PC6] = inthandler; /* pio - pc6 */
	109	_ramvec[vba+CPMVEC_TIMER3] = inthandler; /* timer 3 */
1da177e4 LT	110	_ramvec[vba+CPMVEC_PIO_PC5] = inthandler; /* pio - pc5 */
	111	_ramvec[vba+CPMVEC_PIO_PC4] = inthandler; /* pio - pc4 */
	112	_ramvec[vba+CPMVEC_RESERVED2] = inthandler; /* reserved */
	113	_ramvec[vba+CPMVEC_RISCTIMER] = inthandler; /* timer table */
	114	_ramvec[vba+CPMVEC_TIMER2] = inthandler; /* timer 2 */
	115	_ramvec[vba+CPMVEC_RESERVED3] = inthandler; /* reserved */
	116	_ramvec[vba+CPMVEC_IDMA2] = inthandler; /* idma 2 */
	117	_ramvec[vba+CPMVEC_IDMA1] = inthandler; /* idma 1 */
	118	_ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler; /* sdma channel bus error */
	119	_ramvec[vba+CPMVEC_PIO_PC3] = inthandler; /* pio - pc3 */
	120	_ramvec[vba+CPMVEC_PIO_PC2] = inthandler; /* pio - pc2 */
	121	/* _ramvec[vba+CPMVEC_TIMER1] = cpm_isr_timer1; / / timer 1 */
	122	_ramvec[vba+CPMVEC_TIMER1] = inthandler; /* timer 1 */
	123	_ramvec[vba+CPMVEC_PIO_PC1] = inthandler; /* pio - pc1 */
	124	_ramvec[vba+CPMVEC_SCC4] = inthandler; /* scc 4 */
	125	_ramvec[vba+CPMVEC_SCC3] = inthandler; /* scc 3 */
	126	_ramvec[vba+CPMVEC_SCC2] = inthandler; /* scc 2 */
	127	_ramvec[vba+CPMVEC_SCC1] = inthandler; /* scc 1 */
	128	_ramvec[vba+CPMVEC_PIO_PC0] = inthandler; /* pio - pc0 */
	129
	130
	131	/* turn off all CPM interrupts */
	132	pquicc->intr_cimr = 0x00000000;
1da177e4	133
0531d7b3	134	for (i = 0; (i < NR_IRQS); i++) {
b14769d9 GU	135	set_irq_chip(i, &intc_irq_chip);
b14769d9 GU	136	set_irq_handler(i, handle_level_irq);
0531d7b3	137	}
1da177e4 LT	138	}
1da177e4 LT	139