xref: /OK3568_Linux_fs/u-boot/arch/xtensa/cpu/exceptions.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun  * (C) Copyright 2008 - 2013 Tensilica Inc.
3*4882a593Smuzhiyun  * (C) Copyright 2014 - 2016 Cadence Design Systems Inc.
4*4882a593Smuzhiyun  *
5*4882a593Smuzhiyun  * SPDX-License-Identifier:	GPL-2.0+
6*4882a593Smuzhiyun  */
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun /*
9*4882a593Smuzhiyun  * Exception handling.
10*4882a593Smuzhiyun  *  We currently don't handle any exception and force a reset.
11*4882a593Smuzhiyun  *  (Note that alloca is a special case and handled in start.S)
12*4882a593Smuzhiyun  */
13*4882a593Smuzhiyun 
14*4882a593Smuzhiyun #include <common.h>
15*4882a593Smuzhiyun #include <command.h>
16*4882a593Smuzhiyun #include <asm/string.h>
17*4882a593Smuzhiyun #include <asm/regs.h>
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun typedef void (*handler_t)(struct pt_regs *);
20*4882a593Smuzhiyun 
unhandled_exception(struct pt_regs * regs)21*4882a593Smuzhiyun void unhandled_exception(struct pt_regs *regs)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun 	printf("Unhandled Exception: EXCCAUSE = %ld, EXCVADDR = %lx, pc = %lx\n",
24*4882a593Smuzhiyun 	       regs->exccause, regs->excvaddr, regs->pc);
25*4882a593Smuzhiyun 	panic("*** PANIC\n");
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun 
28*4882a593Smuzhiyun handler_t exc_table[EXCCAUSE_LAST] = {
29*4882a593Smuzhiyun 	[0 ... EXCCAUSE_LAST-1]			= unhandled_exception,
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun 
interrupt_init(void)32*4882a593Smuzhiyun int interrupt_init(void)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun 	return 0;
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun 
enable_interrupts(void)37*4882a593Smuzhiyun void enable_interrupts(void)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun 
disable_interrupts(void)41*4882a593Smuzhiyun int disable_interrupts(void)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun 	return 0;
44*4882a593Smuzhiyun }
45