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 13#include <linux/types.h> 14#include <linux/kernel.h> 15#include <linux/init.h> 16#include <linux/interrupt.h> 17#include <linux/irq.h> 18#include <asm/traps.h> 19#include <asm/machdep.h> 20#include <asm/m68360.h> 21 22/* from quicc/commproc.c: */ 23extern QUICC *pquicc; 24extern void cpm_interrupt_init(void); 25 26#define INTERNAL_IRQS (96) 27 28/* assembler routines */ 29asmlinkage void system_call(void); 30asmlinkage void buserr(void); 31asmlinkage void trap(void); 32asmlinkage void bad_interrupt(void); 33asmlinkage void inthandler(void); 34 35extern void *_ramvec[]; 36 37/* The number of spurious interrupts */ 38volatile unsigned int num_spurious; 39 40static void intc_irq_unmask(unsigned int irq) 41{ 42 pquicc->intr_cimr |= (1 << irq); 43} 44 45static void intc_irq_mask(unsigned int irq) 46{ 47 pquicc->intr_cimr &= ~(1 << irq); 48} 49 50static void intc_irq_ack(unsigned int irq) 51{ 52 pquicc->intr_cisr = (1 << irq); 53} 54 55static 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 62/* 63 * This function should be called during kernel startup to initialize 64 * the vector table. 65 */ 66void init_IRQ(void) 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 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 */ 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; 133 134 for (i = 0; (i < NR_IRQS); i++) { 135 irq_desc[i].status = IRQ_DISABLED; 136 irq_desc[i].action = NULL; 137 irq_desc[i].depth = 1; 138 irq_desc[i].chip = &intc_irq_chip; 139 } 140} 141