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