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: */ 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); 32 asmlinkage void bad_interrupt(void); 33 asmlinkage void inthandler(void); 34 35 extern void *_ramvec[]; 36 intc_irq_unmask(struct irq_data * d)37static void intc_irq_unmask(struct irq_data *d) 38 { 39 pquicc->intr_cimr |= (1 << d->irq); 40 } 41 intc_irq_mask(struct irq_data * d)42static void intc_irq_mask(struct irq_data *d) 43 { 44 pquicc->intr_cimr &= ~(1 << d->irq); 45 } 46 intc_irq_ack(struct irq_data * d)47static void intc_irq_ack(struct irq_data *d) 48 { 49 pquicc->intr_cisr = (1 << d->irq); 50 } 51 52 static struct irq_chip intc_irq_chip = { 53 .name = "M68K-INTC", 54 .irq_mask = intc_irq_mask, 55 .irq_unmask = intc_irq_unmask, 56 .irq_ack = intc_irq_ack, 57 }; 58 59 /* 60 * This function should be called during kernel startup to initialize 61 * the vector table. 62 */ trap_init(void)63void __init trap_init(void) 64 { 65 int vba = (CPM_VECTOR_BASE<<4); 66 67 /* set up the vectors */ 68 _ramvec[2] = buserr; 69 _ramvec[3] = trap; 70 _ramvec[4] = trap; 71 _ramvec[5] = trap; 72 _ramvec[6] = trap; 73 _ramvec[7] = trap; 74 _ramvec[8] = trap; 75 _ramvec[9] = trap; 76 _ramvec[10] = trap; 77 _ramvec[11] = trap; 78 _ramvec[12] = trap; 79 _ramvec[13] = trap; 80 _ramvec[14] = trap; 81 _ramvec[15] = trap; 82 83 _ramvec[32] = system_call; 84 _ramvec[33] = trap; 85 86 cpm_interrupt_init(); 87 88 /* set up CICR for vector base address and irq level */ 89 /* irl = 4, hp = 1f - see MC68360UM p 7-377 */ 90 pquicc->intr_cicr = 0x00e49f00 | vba; 91 92 /* CPM interrupt vectors: (p 7-376) */ 93 _ramvec[vba+CPMVEC_ERROR] = bad_interrupt; /* Error */ 94 _ramvec[vba+CPMVEC_PIO_PC11] = inthandler; /* pio - pc11 */ 95 _ramvec[vba+CPMVEC_PIO_PC10] = inthandler; /* pio - pc10 */ 96 _ramvec[vba+CPMVEC_SMC2] = inthandler; /* smc2/pip */ 97 _ramvec[vba+CPMVEC_SMC1] = inthandler; /* smc1 */ 98 _ramvec[vba+CPMVEC_SPI] = inthandler; /* spi */ 99 _ramvec[vba+CPMVEC_PIO_PC9] = inthandler; /* pio - pc9 */ 100 _ramvec[vba+CPMVEC_TIMER4] = inthandler; /* timer 4 */ 101 _ramvec[vba+CPMVEC_RESERVED1] = inthandler; /* reserved */ 102 _ramvec[vba+CPMVEC_PIO_PC8] = inthandler; /* pio - pc8 */ 103 _ramvec[vba+CPMVEC_PIO_PC7] = inthandler; /* pio - pc7 */ 104 _ramvec[vba+CPMVEC_PIO_PC6] = inthandler; /* pio - pc6 */ 105 _ramvec[vba+CPMVEC_TIMER3] = inthandler; /* timer 3 */ 106 _ramvec[vba+CPMVEC_PIO_PC5] = inthandler; /* pio - pc5 */ 107 _ramvec[vba+CPMVEC_PIO_PC4] = inthandler; /* pio - pc4 */ 108 _ramvec[vba+CPMVEC_RESERVED2] = inthandler; /* reserved */ 109 _ramvec[vba+CPMVEC_RISCTIMER] = inthandler; /* timer table */ 110 _ramvec[vba+CPMVEC_TIMER2] = inthandler; /* timer 2 */ 111 _ramvec[vba+CPMVEC_RESERVED3] = inthandler; /* reserved */ 112 _ramvec[vba+CPMVEC_IDMA2] = inthandler; /* idma 2 */ 113 _ramvec[vba+CPMVEC_IDMA1] = inthandler; /* idma 1 */ 114 _ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler; /* sdma channel bus error */ 115 _ramvec[vba+CPMVEC_PIO_PC3] = inthandler; /* pio - pc3 */ 116 _ramvec[vba+CPMVEC_PIO_PC2] = inthandler; /* pio - pc2 */ 117 /* _ramvec[vba+CPMVEC_TIMER1] = cpm_isr_timer1; */ /* timer 1 */ 118 _ramvec[vba+CPMVEC_TIMER1] = inthandler; /* timer 1 */ 119 _ramvec[vba+CPMVEC_PIO_PC1] = inthandler; /* pio - pc1 */ 120 _ramvec[vba+CPMVEC_SCC4] = inthandler; /* scc 4 */ 121 _ramvec[vba+CPMVEC_SCC3] = inthandler; /* scc 3 */ 122 _ramvec[vba+CPMVEC_SCC2] = inthandler; /* scc 2 */ 123 _ramvec[vba+CPMVEC_SCC1] = inthandler; /* scc 1 */ 124 _ramvec[vba+CPMVEC_PIO_PC0] = inthandler; /* pio - pc0 */ 125 126 127 /* turn off all CPM interrupts */ 128 pquicc->intr_cimr = 0x00000000; 129 } 130 init_IRQ(void)131void init_IRQ(void) 132 { 133 int i; 134 135 for (i = 0; (i < NR_IRQS); i++) { 136 irq_set_chip(i, &intc_irq_chip); 137 irq_set_handler(i, handle_level_irq); 138 } 139 } 140 141