xref: /openbmc/u-boot/arch/m68k/lib/traps.c (revision 6a7b52bc)
1 /*
2  * (C) Copyright 2003
3  * Josef Baumgartner <josef.baumgartner@telex.de>
4  *
5  * (C) Copyright 2000
6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7  *
8  * SPDX-License-Identifier:	GPL-2.0+
9  */
10 
11 #include <common.h>
12 #include <watchdog.h>
13 #include <command.h>
14 #include <asm/processor.h>
15 
16 
17 extern void _exc_handler(void);
18 extern void _int_handler(void);
19 
20 static void show_frame(struct pt_regs *fp)
21 {
22 	printf ("Vector Number: %d  Format: %02x  Fault Status: %01x\n\n", (fp->vector & 0x3fc) >> 2,
23 		fp->format, (fp->vector & 0x3) | ((fp->vector & 0xc00) >> 8));
24 	printf ("PC: %08lx    SR: %08lx    SP: %08lx\n", fp->pc, (long) fp->sr, (long) fp);
25 	printf ("D0: %08lx    D1: %08lx    D2: %08lx    D3: %08lx\n",
26 		fp->d0, fp->d1, fp->d2, fp->d3);
27 	printf ("D4: %08lx    D5: %08lx    D6: %08lx    D7: %08lx\n",
28 		fp->d4, fp->d5, fp->d6, fp->d7);
29 	printf ("A0: %08lx    A1: %08lx    A2: %08lx    A3: %08lx\n",
30 		fp->a0, fp->a1, fp->a2, fp->a3);
31 	printf ("A4: %08lx    A5: %08lx    A6: %08lx\n",
32 		fp->a4, fp->a5, fp->a6);
33 }
34 
35 void exc_handler(struct pt_regs *fp) {
36 	printf("\n\n*** Unexpected exception ***\n");
37 	show_frame (fp);
38 	printf("\n*** Please Reset Board! ***\n");
39 	for(;;);
40 }
41 
42 void trap_init(ulong value) {
43 	unsigned long *vec = (ulong *)value;
44 	int i;
45 
46 	for(i = 2; i < 25; i++) {
47 		vec[i] = (unsigned long)_exc_handler;
48 	}
49 	for(i = 25; i < 32; i++) {
50 		vec[i] = (unsigned long)_int_handler;
51 	}
52 	for(i = 32; i < 64; i++) {
53 		vec[i] = (unsigned long)_exc_handler;
54 	}
55 	for(i = 64; i < 256; i++) {
56 		vec[i] = (unsigned long)_int_handler;
57 	}
58 
59 	setvbr(value);		/* set vector base register to new table */
60 }
61