2 * Copyright (C) 2005-2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include <asm/sysreg.h>
25 #include <asm/ptrace.h>
27 static const char * const cpu_modes[8] = {
28 "Application", "Supervisor", "Interrupt level 0", "Interrupt level 1",
29 "Interrupt level 2", "Interrupt level 3", "Exception", "NMI"
32 static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
37 printf("%s(0x%08lx to 0x%08lx)\n", str, bottom, top);
39 for (p = bottom & ~31; p < top; ) {
40 printf("%04lx: ", p & 0xffff);
42 for (i = 0; i < 8; i++, p += 4) {
45 if (p < bottom || p >= top)
48 val = *(unsigned long *)p;
56 void do_unknown_exception(unsigned int ecr, struct pt_regs *regs)
60 printf("\n *** Unhandled exception %u at PC=0x%08lx\n", ecr, regs->pc);
63 case ECR_BUS_ERROR_WRITE:
64 case ECR_BUS_ERROR_READ:
65 printf("Bus error at address 0x%08lx\n",
68 case ECR_TLB_MULTIPLE:
69 case ECR_ADDR_ALIGN_X:
70 case ECR_PROTECTION_X:
71 case ECR_ADDR_ALIGN_R:
72 case ECR_ADDR_ALIGN_W:
73 case ECR_PROTECTION_R:
74 case ECR_PROTECTION_W:
75 case ECR_DTLB_MODIFIED:
79 printf("MMU exception at address 0x%08lx\n",
84 printf(" pc: %08lx lr: %08lx sp: %08lx r12: %08lx\n",
85 regs->pc, regs->lr, regs->sp, regs->r12);
86 printf(" r11: %08lx r10: %08lx r9: %08lx r8: %08lx\n",
87 regs->r11, regs->r10, regs->r9, regs->r8);
88 printf(" r7: %08lx r6: %08lx r5: %08lx r4: %08lx\n",
89 regs->r7, regs->r6, regs->r5, regs->r4);
90 printf(" r3: %08lx r2: %08lx r1: %08lx r0: %08lx\n",
91 regs->r3, regs->r2, regs->r1, regs->r0);
92 printf("Flags: %c%c%c%c%c\n",
93 regs->sr & SR_Q ? 'Q' : 'q',
94 regs->sr & SR_V ? 'V' : 'v',
95 regs->sr & SR_N ? 'N' : 'n',
96 regs->sr & SR_Z ? 'Z' : 'z',
97 regs->sr & SR_C ? 'C' : 'c');
98 printf("Mode bits: %c%c%c%c%c%c%c%c%c\n",
99 regs->sr & SR_H ? 'H' : 'h',
100 regs->sr & SR_R ? 'R' : 'r',
101 regs->sr & SR_J ? 'J' : 'j',
102 regs->sr & SR_EM ? 'E' : 'e',
103 regs->sr & SR_I3M ? '3' : '.',
104 regs->sr & SR_I2M ? '2' : '.',
105 regs->sr & SR_I1M ? '1' : '.',
106 regs->sr & SR_I0M ? '0' : '.',
107 regs->sr & SR_GM ? 'G' : 'g');
108 mode = (regs->sr >> SYSREG_M0_OFFSET) & 7;
109 printf("CPU Mode: %s\n", cpu_modes[mode]);
111 /* Avoid exception loops */
112 if (regs->sp >= CFG_INIT_SP_ADDR
113 || regs->sp < (CFG_INIT_SP_ADDR - CONFIG_STACKSIZE))
114 printf("\nStack pointer seems bogus, won't do stack dump\n");
116 dump_mem("\nStack: ", regs->sp, CFG_INIT_SP_ADDR);
118 panic("Unhandled exception\n");