2 * linux/arch/m68knommu/platform/68328/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 1996 Roman Zippel
9 * Copyright 1999 D. Jeff Dionne <jeff@rt-control.com>
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <asm/traps.h>
19 #include <asm/machdep.h>
21 #if defined(CONFIG_M68328)
22 #include <asm/MC68328.h>
23 #elif defined(CONFIG_M68EZ328)
24 #include <asm/MC68EZ328.h>
25 #elif defined(CONFIG_M68VZ328)
26 #include <asm/MC68VZ328.h>
29 /* assembler routines */
30 asmlinkage void system_call(void);
31 asmlinkage void buserr(void);
32 asmlinkage void trap(void);
33 asmlinkage void trap3(void);
34 asmlinkage void trap4(void);
35 asmlinkage void trap5(void);
36 asmlinkage void trap6(void);
37 asmlinkage void trap7(void);
38 asmlinkage void trap8(void);
39 asmlinkage void trap9(void);
40 asmlinkage void trap10(void);
41 asmlinkage void trap11(void);
42 asmlinkage void trap12(void);
43 asmlinkage void trap13(void);
44 asmlinkage void trap14(void);
45 asmlinkage void trap15(void);
46 asmlinkage void trap33(void);
47 asmlinkage void trap34(void);
48 asmlinkage void trap35(void);
49 asmlinkage void trap36(void);
50 asmlinkage void trap37(void);
51 asmlinkage void trap38(void);
52 asmlinkage void trap39(void);
53 asmlinkage void trap40(void);
54 asmlinkage void trap41(void);
55 asmlinkage void trap42(void);
56 asmlinkage void trap43(void);
57 asmlinkage void trap44(void);
58 asmlinkage void trap45(void);
59 asmlinkage void trap46(void);
60 asmlinkage void trap47(void);
61 asmlinkage irqreturn_t bad_interrupt(int, void *);
62 asmlinkage irqreturn_t inthandler(void);
63 asmlinkage irqreturn_t inthandler1(void);
64 asmlinkage irqreturn_t inthandler2(void);
65 asmlinkage irqreturn_t inthandler3(void);
66 asmlinkage irqreturn_t inthandler4(void);
67 asmlinkage irqreturn_t inthandler5(void);
68 asmlinkage irqreturn_t inthandler6(void);
69 asmlinkage irqreturn_t inthandler7(void);
71 extern e_vector *_ramvec;
73 /* The number of spurious interrupts */
74 volatile unsigned int num_spurious;
77 * This function should be called during kernel startup to initialize
78 * the machine vector table.
80 void __init init_vectors(void)
84 /* set up the vectors */
85 for (i = 72; i < 256; ++i)
86 _ramvec[i] = (e_vector) bad_interrupt;
88 _ramvec[32] = system_call;
90 _ramvec[65] = (e_vector) inthandler1;
91 _ramvec[66] = (e_vector) inthandler2;
92 _ramvec[67] = (e_vector) inthandler3;
93 _ramvec[68] = (e_vector) inthandler4;
94 _ramvec[69] = (e_vector) inthandler5;
95 _ramvec[70] = (e_vector) inthandler6;
96 _ramvec[71] = (e_vector) inthandler7;
98 IVR = 0x40; /* Set DragonBall IVR (interrupt base) to 64 */
100 /* turn off all interrupts */
104 /* The 68k family did not have a good way to determine the source
105 * of interrupts until later in the family. The EC000 core does
106 * not provide the vector number on the stack, we vector everything
107 * into one vector and look in the blasted mask register...
108 * This code is designed to be fast, almost constant time, not clean!
110 void process_int(int vec, struct pt_regs *fp)
115 unsigned long pend = ISR;
118 if (pend & 0x0000ffff) {
119 if (pend & 0x000000ff) {
120 if (pend & 0x0000000f) {
128 if (pend & 0x00000f00) {
137 if (pend & 0x00ff0000) {
138 if (pend & 0x000f0000) {
146 if (pend & 0x0f000000) {
156 while (! (mask & pend)) {
166 void enable_vector(unsigned int irq)
171 void disable_vector(unsigned int irq)
176 void ack_vector(unsigned int irq)