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