143 lines
4.4 KiB
C
143 lines
4.4 KiB
C
/*
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* linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2000 Michael Leslie <mleslie@lineo.com>
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* Copyright (c) 1996 Roman Zippel
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* Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.org>
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <asm/traps.h>
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#include <asm/machdep.h>
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#include <asm/m68360.h>
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/* from quicc/commproc.c: */
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extern QUICC *pquicc;
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extern void cpm_interrupt_init(void);
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#define INTERNAL_IRQS (96)
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/* assembler routines */
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asmlinkage void system_call(void);
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asmlinkage void buserr(void);
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asmlinkage void trap(void);
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asmlinkage void bad_interrupt(void);
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asmlinkage void inthandler(void);
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extern void *_ramvec[];
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/* The number of spurious interrupts */
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volatile unsigned int num_spurious;
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static void intc_irq_unmask(unsigned int irq)
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{
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pquicc->intr_cimr |= (1 << irq);
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}
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static void intc_irq_mask(unsigned int irq)
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{
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pquicc->intr_cimr &= ~(1 << irq);
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}
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static void intc_irq_ack(unsigned int irq)
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{
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pquicc->intr_cisr = (1 << irq);
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}
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static struct irq_chip intc_irq_chip = {
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.name = "M68K-INTC",
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.mask = intc_irq_mask,
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.unmask = intc_irq_unmask,
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.ack = intc_irq_ack,
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};
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/*
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* This function should be called during kernel startup to initialize
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* the vector table.
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*/
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void init_IRQ(void)
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{
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int i;
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int vba = (CPM_VECTOR_BASE<<4);
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/* set up the vectors */
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_ramvec[2] = buserr;
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_ramvec[3] = trap;
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_ramvec[4] = trap;
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_ramvec[5] = trap;
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_ramvec[6] = trap;
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_ramvec[7] = trap;
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_ramvec[8] = trap;
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_ramvec[9] = trap;
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_ramvec[10] = trap;
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_ramvec[11] = trap;
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_ramvec[12] = trap;
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_ramvec[13] = trap;
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_ramvec[14] = trap;
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_ramvec[15] = trap;
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_ramvec[32] = system_call;
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_ramvec[33] = trap;
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cpm_interrupt_init();
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/* set up CICR for vector base address and irq level */
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/* irl = 4, hp = 1f - see MC68360UM p 7-377 */
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pquicc->intr_cicr = 0x00e49f00 | vba;
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/* CPM interrupt vectors: (p 7-376) */
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_ramvec[vba+CPMVEC_ERROR] = bad_interrupt; /* Error */
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_ramvec[vba+CPMVEC_PIO_PC11] = inthandler; /* pio - pc11 */
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_ramvec[vba+CPMVEC_PIO_PC10] = inthandler; /* pio - pc10 */
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_ramvec[vba+CPMVEC_SMC2] = inthandler; /* smc2/pip */
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_ramvec[vba+CPMVEC_SMC1] = inthandler; /* smc1 */
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_ramvec[vba+CPMVEC_SPI] = inthandler; /* spi */
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_ramvec[vba+CPMVEC_PIO_PC9] = inthandler; /* pio - pc9 */
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_ramvec[vba+CPMVEC_TIMER4] = inthandler; /* timer 4 */
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_ramvec[vba+CPMVEC_RESERVED1] = inthandler; /* reserved */
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_ramvec[vba+CPMVEC_PIO_PC8] = inthandler; /* pio - pc8 */
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_ramvec[vba+CPMVEC_PIO_PC7] = inthandler; /* pio - pc7 */
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_ramvec[vba+CPMVEC_PIO_PC6] = inthandler; /* pio - pc6 */
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_ramvec[vba+CPMVEC_TIMER3] = inthandler; /* timer 3 */
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_ramvec[vba+CPMVEC_RISCTIMER] = inthandler; /* reserved */
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_ramvec[vba+CPMVEC_PIO_PC5] = inthandler; /* pio - pc5 */
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_ramvec[vba+CPMVEC_PIO_PC4] = inthandler; /* pio - pc4 */
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_ramvec[vba+CPMVEC_RESERVED2] = inthandler; /* reserved */
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_ramvec[vba+CPMVEC_RISCTIMER] = inthandler; /* timer table */
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_ramvec[vba+CPMVEC_TIMER2] = inthandler; /* timer 2 */
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_ramvec[vba+CPMVEC_RESERVED3] = inthandler; /* reserved */
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_ramvec[vba+CPMVEC_IDMA2] = inthandler; /* idma 2 */
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_ramvec[vba+CPMVEC_IDMA1] = inthandler; /* idma 1 */
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_ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler; /* sdma channel bus error */
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_ramvec[vba+CPMVEC_PIO_PC3] = inthandler; /* pio - pc3 */
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_ramvec[vba+CPMVEC_PIO_PC2] = inthandler; /* pio - pc2 */
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/* _ramvec[vba+CPMVEC_TIMER1] = cpm_isr_timer1; */ /* timer 1 */
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_ramvec[vba+CPMVEC_TIMER1] = inthandler; /* timer 1 */
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_ramvec[vba+CPMVEC_PIO_PC1] = inthandler; /* pio - pc1 */
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_ramvec[vba+CPMVEC_SCC4] = inthandler; /* scc 4 */
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_ramvec[vba+CPMVEC_SCC3] = inthandler; /* scc 3 */
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_ramvec[vba+CPMVEC_SCC2] = inthandler; /* scc 2 */
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_ramvec[vba+CPMVEC_SCC1] = inthandler; /* scc 1 */
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_ramvec[vba+CPMVEC_PIO_PC0] = inthandler; /* pio - pc0 */
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/* turn off all CPM interrupts */
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pquicc->intr_cimr = 0x00000000;
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for (i = 0; (i < NR_IRQS); i++) {
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irq_desc[i].status = IRQ_DISABLED;
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irq_desc[i].action = NULL;
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irq_desc[i].depth = 1;
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irq_desc[i].chip = &intc_irq_chip;
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}
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}
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