2 * linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
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
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>
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>
22 /* from quicc/commproc.c: */
24 extern void cpm_interrupt_init(void);
26 #define INTERNAL_IRQS (96)
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);
35 extern void *_ramvec[];
37 /* The number of spurious interrupts */
38 volatile unsigned int num_spurious;
40 static void intc_irq_unmask(struct irq_data *d)
42 pquicc->intr_cimr |= (1 << d->irq);
45 static void intc_irq_mask(struct irq_data *d)
47 pquicc->intr_cimr &= ~(1 << d->irq);
50 static void intc_irq_ack(struct irq_data *d)
52 pquicc->intr_cisr = (1 << d->irq);
55 static struct irq_chip intc_irq_chip = {
57 .irq_mask = intc_irq_mask,
58 .irq_unmask = intc_irq_unmask,
59 .irq_ack = intc_irq_ack,
63 * This function should be called during kernel startup to initialize
66 void __init trap_init(void)
68 int vba = (CPM_VECTOR_BASE<<4);
70 /* set up the vectors */
86 _ramvec[32] = system_call;
91 /* set up CICR for vector base address and irq level */
92 /* irl = 4, hp = 1f - see MC68360UM p 7-377 */
93 pquicc->intr_cicr = 0x00e49f00 | vba;
95 /* CPM interrupt vectors: (p 7-376) */
96 _ramvec[vba+CPMVEC_ERROR] = bad_interrupt; /* Error */
97 _ramvec[vba+CPMVEC_PIO_PC11] = inthandler; /* pio - pc11 */
98 _ramvec[vba+CPMVEC_PIO_PC10] = inthandler; /* pio - pc10 */
99 _ramvec[vba+CPMVEC_SMC2] = inthandler; /* smc2/pip */
100 _ramvec[vba+CPMVEC_SMC1] = inthandler; /* smc1 */
101 _ramvec[vba+CPMVEC_SPI] = inthandler; /* spi */
102 _ramvec[vba+CPMVEC_PIO_PC9] = inthandler; /* pio - pc9 */
103 _ramvec[vba+CPMVEC_TIMER4] = inthandler; /* timer 4 */
104 _ramvec[vba+CPMVEC_RESERVED1] = inthandler; /* reserved */
105 _ramvec[vba+CPMVEC_PIO_PC8] = inthandler; /* pio - pc8 */
106 _ramvec[vba+CPMVEC_PIO_PC7] = inthandler; /* pio - pc7 */
107 _ramvec[vba+CPMVEC_PIO_PC6] = inthandler; /* pio - pc6 */
108 _ramvec[vba+CPMVEC_TIMER3] = inthandler; /* timer 3 */
109 _ramvec[vba+CPMVEC_PIO_PC5] = inthandler; /* pio - pc5 */
110 _ramvec[vba+CPMVEC_PIO_PC4] = inthandler; /* pio - pc4 */
111 _ramvec[vba+CPMVEC_RESERVED2] = inthandler; /* reserved */
112 _ramvec[vba+CPMVEC_RISCTIMER] = inthandler; /* timer table */
113 _ramvec[vba+CPMVEC_TIMER2] = inthandler; /* timer 2 */
114 _ramvec[vba+CPMVEC_RESERVED3] = inthandler; /* reserved */
115 _ramvec[vba+CPMVEC_IDMA2] = inthandler; /* idma 2 */
116 _ramvec[vba+CPMVEC_IDMA1] = inthandler; /* idma 1 */
117 _ramvec[vba+CPMVEC_SDMA_CB_ERR] = inthandler; /* sdma channel bus error */
118 _ramvec[vba+CPMVEC_PIO_PC3] = inthandler; /* pio - pc3 */
119 _ramvec[vba+CPMVEC_PIO_PC2] = inthandler; /* pio - pc2 */
120 /* _ramvec[vba+CPMVEC_TIMER1] = cpm_isr_timer1; */ /* timer 1 */
121 _ramvec[vba+CPMVEC_TIMER1] = inthandler; /* timer 1 */
122 _ramvec[vba+CPMVEC_PIO_PC1] = inthandler; /* pio - pc1 */
123 _ramvec[vba+CPMVEC_SCC4] = inthandler; /* scc 4 */
124 _ramvec[vba+CPMVEC_SCC3] = inthandler; /* scc 3 */
125 _ramvec[vba+CPMVEC_SCC2] = inthandler; /* scc 2 */
126 _ramvec[vba+CPMVEC_SCC1] = inthandler; /* scc 1 */
127 _ramvec[vba+CPMVEC_PIO_PC0] = inthandler; /* pio - pc0 */
130 /* turn off all CPM interrupts */
131 pquicc->intr_cimr = 0x00000000;
138 for (i = 0; (i < NR_IRQS); i++) {
139 irq_set_chip(i, &intc_irq_chip);
140 irq_set_handler(i, handle_level_irq);