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/*
* Copyright (C) 2005-2006 Atmel Corporation
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/sysreg.h>
#include <asm/ptrace.h>
DECLARE_GLOBAL_DATA_PTR;
static const char * const cpu_modes[8] = {
"Application", "Supervisor", "Interrupt level 0", "Interrupt level 1",
"Interrupt level 2", "Interrupt level 3", "Exception", "NMI"
};
static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
{
unsigned long p;
int i;
printf("%s(0x%08lx to 0x%08lx)\n", str, bottom, top);
for (p = bottom & ~31; p < top; ) {
printf("%04lx: ", p & 0xffff);
for (i = 0; i < 8; i++, p += 4) {
unsigned int val;
if (p < bottom || p >= top)
printf(" ");
else {
val = *(unsigned long *)p;
printf("%08x ", val);
}
}
printf("\n");
}
}
void do_unknown_exception(unsigned int ecr, struct pt_regs *regs)
{
unsigned int mode;
printf("\n *** Unhandled exception %u at PC=0x%08lx\n", ecr, regs->pc);
switch (ecr) {
case ECR_BUS_ERROR_WRITE:
case ECR_BUS_ERROR_READ:
printf("Bus error at address 0x%08lx\n",
sysreg_read(BEAR));
break;
case ECR_TLB_MULTIPLE:
case ECR_ADDR_ALIGN_X:
case ECR_PROTECTION_X:
case ECR_ADDR_ALIGN_R:
case ECR_ADDR_ALIGN_W:
case ECR_PROTECTION_R:
case ECR_PROTECTION_W:
case ECR_DTLB_MODIFIED:
case ECR_TLB_MISS_X:
case ECR_TLB_MISS_R:
case ECR_TLB_MISS_W:
printf("MMU exception at address 0x%08lx\n",
sysreg_read(TLBEAR));
break;
}
printf(" pc: %08lx lr: %08lx sp: %08lx r12: %08lx\n",
regs->pc, regs->lr, regs->sp, regs->r12);
printf(" r11: %08lx r10: %08lx r9: %08lx r8: %08lx\n",
regs->r11, regs->r10, regs->r9, regs->r8);
printf(" r7: %08lx r6: %08lx r5: %08lx r4: %08lx\n",
regs->r7, regs->r6, regs->r5, regs->r4);
printf(" r3: %08lx r2: %08lx r1: %08lx r0: %08lx\n",
regs->r3, regs->r2, regs->r1, regs->r0);
printf("Flags: %c%c%c%c%c\n",
regs->sr & SR_Q ? 'Q' : 'q',
regs->sr & SR_V ? 'V' : 'v',
regs->sr & SR_N ? 'N' : 'n',
regs->sr & SR_Z ? 'Z' : 'z',
regs->sr & SR_C ? 'C' : 'c');
printf("Mode bits: %c%c%c%c%c%c%c%c%c\n",
regs->sr & SR_H ? 'H' : 'h',
regs->sr & SR_R ? 'R' : 'r',
regs->sr & SR_J ? 'J' : 'j',
regs->sr & SR_EM ? 'E' : 'e',
regs->sr & SR_I3M ? '3' : '.',
regs->sr & SR_I2M ? '2' : '.',
regs->sr & SR_I1M ? '1' : '.',
regs->sr & SR_I0M ? '0' : '.',
regs->sr & SR_GM ? 'G' : 'g');
mode = (regs->sr >> SYSREG_M0_OFFSET) & 7;
printf("CPU Mode: %s\n", cpu_modes[mode]);
/* Avoid exception loops */
if (regs->sp < (gd->stack_end - CONFIG_STACKSIZE)
|| regs->sp >= gd->stack_end)
printf("\nStack pointer seems bogus, won't do stack dump\n");
else
dump_mem("\nStack: ", regs->sp, gd->stack_end);
panic("Unhandled exception\n");
}
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