mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-29 22:43:10 +00:00
25a5818ff8
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
157 lines
3.5 KiB
C
157 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* linux/arch/powerpc/kernel/traps.c
|
|
*
|
|
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
|
|
*
|
|
* Modified by Cort Dougan (cort@cs.nmt.edu)
|
|
* and Paul Mackerras (paulus@cs.anu.edu.au)
|
|
*
|
|
* (C) Copyright 2000
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*/
|
|
|
|
/*
|
|
* This file handles the architecture-dependent parts of hardware exceptions
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/ptrace.h>
|
|
#include <command.h>
|
|
#include <asm/processor.h>
|
|
|
|
/* Returns 0 if exception not found and fixup otherwise. */
|
|
extern unsigned long search_exception_table(unsigned long);
|
|
|
|
/* THIS NEEDS CHANGING to use the board info structure.
|
|
*/
|
|
#define END_OF_MEM 0x02000000
|
|
|
|
/*
|
|
* Trap & Exception support
|
|
*/
|
|
|
|
static void print_backtrace(unsigned long *sp)
|
|
{
|
|
int cnt = 0;
|
|
unsigned long i;
|
|
|
|
printf("Call backtrace: ");
|
|
while (sp) {
|
|
if ((uint)sp > END_OF_MEM)
|
|
break;
|
|
|
|
i = sp[1];
|
|
if (cnt++ % 7 == 0)
|
|
printf("\n");
|
|
printf("%08lX ", i);
|
|
if (cnt > 32)
|
|
break;
|
|
sp = (unsigned long *)*sp;
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
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);
|
|
|
|
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");
|
|
}
|
|
}
|
|
|
|
|
|
static void _exception(int signr, struct pt_regs *regs)
|
|
{
|
|
show_regs(regs);
|
|
print_backtrace((unsigned long *)regs->gpr[1]);
|
|
panic("Exception in kernel pc %lx signal %d", regs->nip, signr);
|
|
}
|
|
|
|
void MachineCheckException(struct pt_regs *regs)
|
|
{
|
|
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 != 0) {
|
|
regs->nip = fixup;
|
|
return;
|
|
}
|
|
|
|
printf("Machine check in kernel mode.\n");
|
|
printf("Caused by (from msr): ");
|
|
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):
|
|
printf("Transfer error ack signal\n");
|
|
break;
|
|
case (0x80000000 >> 14):
|
|
printf("Data parity signal\n");
|
|
break;
|
|
case (0x80000000 >> 15):
|
|
printf("Address parity signal\n");
|
|
break;
|
|
default:
|
|
printf("Unknown values in msr\n");
|
|
}
|
|
show_regs(regs);
|
|
print_backtrace((unsigned long *)regs->gpr[1]);
|
|
panic("machine check");
|
|
}
|
|
|
|
void AlignmentException(struct pt_regs *regs)
|
|
{
|
|
show_regs(regs);
|
|
print_backtrace((unsigned long *)regs->gpr[1]);
|
|
panic("Alignment Exception");
|
|
}
|
|
|
|
void ProgramCheckException(struct pt_regs *regs)
|
|
{
|
|
show_regs(regs);
|
|
print_backtrace((unsigned long *)regs->gpr[1]);
|
|
panic("Program Check Exception");
|
|
}
|
|
|
|
void SoftEmuException(struct pt_regs *regs)
|
|
{
|
|
show_regs(regs);
|
|
print_backtrace((unsigned long *)regs->gpr[1]);
|
|
panic("Software Emulation Exception");
|
|
}
|
|
|
|
|
|
void UnknownException(struct pt_regs *regs)
|
|
{
|
|
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);
|
|
}
|