xref: /openbmc/u-boot/arch/microblaze/cpu/exception.c (revision 607232e4)
1 /*
2  * (C) Copyright 2007 Michal Simek
3  *
4  * Michal  SIMEK <monstr@monstr.eu>
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  */
8 
9 #include <common.h>
10 #include <asm/asm.h>
11 
12 void _hw_exception_handler (void)
13 {
14 	int address = 0;
15 	int state = 0;
16 	/* loading address of exception EAR */
17 	MFS (address, rear);
18 	/* loading excetpion state register ESR */
19 	MFS (state, resr);
20 	printf ("Hardware exception at 0x%x address\n", address);
21 	switch (state & 0x1f) {	/* mask on exception cause */
22 	case 0x1:
23 		puts ("Unaligned data access exception\n");
24 		break;
25 	case 0x2:
26 		puts ("Illegal op-code exception\n");
27 		break;
28 	case 0x3:
29 		puts ("Instruction bus error exception\n");
30 		break;
31 	case 0x4:
32 		puts ("Data bus error exception\n");
33 		break;
34 	case 0x5:
35 		puts ("Divide by zero exception\n");
36 		break;
37 #ifdef MICROBLAZE_V5
38 	case 0x1000:
39 		puts ("Exception in delay slot\n");
40 		break;
41 #endif
42 	default:
43 		puts ("Undefined cause\n");
44 		break;
45 	}
46 	printf ("Unaligned %sword access\n", ((state & 0x800) ? "" : "half"));
47 	printf ("Unaligned %s access\n", ((state & 0x400) ? "store" : "load"));
48 	printf ("Register R%x\n", (state & 0x3E) >> 5);
49 	hang ();
50 }
51 
52 #ifdef CONFIG_SYS_USR_EXCEP
53 void _exception_handler (void)
54 {
55 	puts ("User vector_exception\n");
56 	hang ();
57 }
58 #endif
59