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1 // SPDX-License-Identifier: GPL-2.0
2 /***************************************************************************/
3 
4 /*
5  *	vectors.c  -- high level trap setup for ColdFire
6  *
7  *	Copyright (C) 1999-2007, Greg Ungerer <gerg@snapgear.com>
8  */
9 
10 /***************************************************************************/
11 
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/irq.h>
15 #include <asm/traps.h>
16 #include <asm/machdep.h>
17 #include <asm/coldfire.h>
18 #include <asm/mcfsim.h>
19 #include <asm/mcfwdebug.h>
20 
21 /***************************************************************************/
22 
23 #ifdef TRAP_DBG_INTERRUPT
24 
dbginterrupt_c(struct frame * fp)25 asmlinkage void dbginterrupt_c(struct frame *fp)
26 {
27 	extern void dump(struct pt_regs *fp);
28 	printk(KERN_DEBUG "%s(%d): BUS ERROR TRAP\n", __FILE__, __LINE__);
29 	dump((struct pt_regs *) fp);
30 	asm("halt");
31 }
32 
33 #endif
34 
35 /***************************************************************************/
36 
37 /* Assembler routines */
38 asmlinkage void buserr(void);
39 asmlinkage void trap(void);
40 asmlinkage void system_call(void);
41 asmlinkage void inthandler(void);
42 
trap_init(void)43 void __init trap_init(void)
44 {
45 	int i;
46 
47 	/*
48 	 *	There is a common trap handler and common interrupt
49 	 *	handler that handle almost every vector. We treat
50 	 *	the system call and bus error special, they get their
51 	 *	own first level handlers.
52 	 */
53 	for (i = 3; (i <= 23); i++)
54 		_ramvec[i] = trap;
55 	for (i = 33; (i <= 63); i++)
56 		_ramvec[i] = trap;
57 	for (i = 24; (i <= 31); i++)
58 		_ramvec[i] = inthandler;
59 	for (i = 64; (i < 255); i++)
60 		_ramvec[i] = inthandler;
61 	_ramvec[255] = 0;
62 
63 	_ramvec[2] = buserr;
64 	_ramvec[32] = system_call;
65 
66 #ifdef TRAP_DBG_INTERRUPT
67 	_ramvec[12] = dbginterrupt;
68 #endif
69 }
70 
71 /***************************************************************************/
72