+// SPDX-License-Identifier: GPL-2.0+
/*
* linux/arch/powerpc/kernel/traps.c
*
*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * 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 <command.h>
-#include <kgdb.h>
#include <asm/processor.h>
-#if defined(CONFIG_CMD_BEDBUG)
-extern void do_bedbug_breakpoint(struct pt_regs *);
-#endif
-
/* Returns 0 if exception not found and fixup otherwise. */
extern unsigned long search_exception_table(unsigned long);
if (cnt++ % 7 == 0)
printf("\n");
printf("%08lX ", i);
- if (cnt > 32) break;
+ if (cnt > 32)
+ break;
sp = (unsigned long *)*sp;
}
printf("\n");
}
-void show_regs(struct pt_regs *regs)
+static void show_regs(struct pt_regs *regs)
{
int i;
printf("NIP: %08lX XER: %08lX LR: %08lX REGS: %p TRAP: %04lx DAR: %08lX\n",
regs->nip, regs->xer, regs->link, regs, regs->trap, regs->dar);
printf("MSR: %08lx EE: %01x PR: %01x FP: %01x ME: %01x IR/DR: %01x%01x\n",
- regs->msr, regs->msr&MSR_EE ? 1 : 0, regs->msr&MSR_PR ? 1 : 0,
- regs->msr & MSR_FP ? 1 : 0,regs->msr&MSR_ME ? 1 : 0,
- regs->msr&MSR_IR ? 1 : 0,
- regs->msr&MSR_DR ? 1 : 0);
+ regs->msr, regs->msr & MSR_EE ? 1 : 0,
+ regs->msr & MSR_PR ? 1 : 0, regs->msr & MSR_FP ? 1 : 0,
+ regs->msr & MSR_ME ? 1 : 0, regs->msr & MSR_IR ? 1 : 0,
+ regs->msr & MSR_DR ? 1 : 0);
printf("\n");
for (i = 0; i < 32; i++) {
if ((i % 8) == 0)
- {
printf("GPR%02d: ", i);
- }
printf("%08lX ", regs->gpr[i]);
if ((i % 8) == 7)
- {
printf("\n");
- }
}
}
{
show_regs(regs);
print_backtrace((unsigned long *)regs->gpr[1]);
- panic("Exception in kernel pc %lx signal %d",regs->nip,signr);
+ panic("Exception in kernel pc %lx signal %d", regs->nip, signr);
}
void MachineCheckException(struct pt_regs *regs)
{
- unsigned long fixup;
+ unsigned long fixup = search_exception_table(regs->nip);
/* Probing PCI using config cycles cause this exception
* when a device is not present. Catch it and return to
* the PCI exception handler.
*/
- if ((fixup = search_exception_table(regs->nip)) != 0) {
+ if (fixup != 0) {
regs->nip = fixup;
return;
}
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
-
printf("Machine check in kernel mode.\n");
printf("Caused by (from msr): ");
- printf("regs %p ",regs);
- switch( regs->msr & 0x000F0000) {
- case (0x80000000>>12):
+ printf("regs %p ", regs);
+ switch (regs->msr & 0x000F0000) {
+ case (0x80000000 >> 12):
printf("Machine check signal - probably due to mm fault\n"
"with mmu off\n");
break;
- case (0x80000000>>13):
+ case (0x80000000 >> 13):
printf("Transfer error ack signal\n");
break;
- case (0x80000000>>14):
+ case (0x80000000 >> 14):
printf("Data parity signal\n");
break;
- case (0x80000000>>15):
+ case (0x80000000 >> 15):
printf("Address parity signal\n");
break;
default:
void AlignmentException(struct pt_regs *regs)
{
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
show_regs(regs);
print_backtrace((unsigned long *)regs->gpr[1]);
panic("Alignment Exception");
void ProgramCheckException(struct pt_regs *regs)
{
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
show_regs(regs);
print_backtrace((unsigned long *)regs->gpr[1]);
panic("Program Check Exception");
void SoftEmuException(struct pt_regs *regs)
{
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
show_regs(regs);
print_backtrace((unsigned long *)regs->gpr[1]);
panic("Software Emulation Exception");
void UnknownException(struct pt_regs *regs)
{
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
printf("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
regs->nip, regs->msr, regs->trap);
_exception(0, regs);
void DebugException(struct pt_regs *regs)
{
- printf("Debugger trap at @ %lx\n", regs->nip );
- show_regs(regs);
-#if defined(CONFIG_CMD_BEDBUG)
- do_bedbug_breakpoint( regs );
-#endif
-}
-
-/* Probe an address by reading. If not present, return -1, otherwise
- * return 0.
- */
-int addr_probe(uint *addr)
-{
-#if 0
- int retval;
-
- __asm__ __volatile__( \
- "1: lwz %0,0(%1)\n" \
- " eieio\n" \
- " li %0,0\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: li %0,-1\n" \
- " b 2b\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 2\n" \
- " .long 1b,3b\n" \
- ".text" \
- : "=r" (retval) : "r"(addr));
-
- return (retval);
-#endif
- return 0;
+ printf("Debugger trap at @ %lx\n", regs->nip);
+ show_regs(regs);
}
projects / oweals / u-boot.git / blobdiff