mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
156 lines
3.5 KiB
C
156 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* linux/arch/powerpc/kernel/traps.c
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*
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* Modified by Cort Dougan (cort@cs.nmt.edu)
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* and Paul Mackerras (paulus@cs.anu.edu.au)
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*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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/*
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* This file handles the architecture-dependent parts of hardware exceptions
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/processor.h>
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/* Returns 0 if exception not found and fixup otherwise. */
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extern unsigned long search_exception_table(unsigned long);
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/* THIS NEEDS CHANGING to use the board info structure.
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*/
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#define END_OF_MEM 0x02000000
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/*
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* Trap & Exception support
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*/
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static void print_backtrace(unsigned long *sp)
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{
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int cnt = 0;
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unsigned long i;
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printf("Call backtrace: ");
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while (sp) {
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if ((uint)sp > END_OF_MEM)
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break;
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i = sp[1];
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if (cnt++ % 7 == 0)
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printf("\n");
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printf("%08lX ", i);
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if (cnt > 32)
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break;
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sp = (unsigned long *)*sp;
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}
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printf("\n");
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}
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static void show_regs(struct pt_regs *regs)
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{
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int i;
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printf("NIP: %08lX XER: %08lX LR: %08lX REGS: %p TRAP: %04lx DAR: %08lX\n",
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regs->nip, regs->xer, regs->link, regs, regs->trap, regs->dar);
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printf("MSR: %08lx EE: %01x PR: %01x FP: %01x ME: %01x IR/DR: %01x%01x\n",
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regs->msr, regs->msr & MSR_EE ? 1 : 0,
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regs->msr & MSR_PR ? 1 : 0, regs->msr & MSR_FP ? 1 : 0,
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regs->msr & MSR_ME ? 1 : 0, regs->msr & MSR_IR ? 1 : 0,
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regs->msr & MSR_DR ? 1 : 0);
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printf("\n");
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for (i = 0; i < 32; i++) {
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if ((i % 8) == 0)
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printf("GPR%02d: ", i);
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printf("%08lX ", regs->gpr[i]);
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if ((i % 8) == 7)
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printf("\n");
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}
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}
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static void _exception(int signr, struct pt_regs *regs)
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{
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show_regs(regs);
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print_backtrace((unsigned long *)regs->gpr[1]);
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panic("Exception in kernel pc %lx signal %d", regs->nip, signr);
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}
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void MachineCheckException(struct pt_regs *regs)
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{
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unsigned long fixup = search_exception_table(regs->nip);
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/* Probing PCI using config cycles cause this exception
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* when a device is not present. Catch it and return to
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* the PCI exception handler.
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*/
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if (fixup != 0) {
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regs->nip = fixup;
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return;
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}
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printf("Machine check in kernel mode.\n");
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printf("Caused by (from msr): ");
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printf("regs %p ", regs);
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switch (regs->msr & 0x000F0000) {
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case (0x80000000 >> 12):
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printf("Machine check signal - probably due to mm fault\n"
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"with mmu off\n");
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break;
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case (0x80000000 >> 13):
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printf("Transfer error ack signal\n");
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break;
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case (0x80000000 >> 14):
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printf("Data parity signal\n");
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break;
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case (0x80000000 >> 15):
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printf("Address parity signal\n");
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break;
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default:
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printf("Unknown values in msr\n");
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}
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show_regs(regs);
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print_backtrace((unsigned long *)regs->gpr[1]);
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panic("machine check");
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}
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void AlignmentException(struct pt_regs *regs)
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{
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show_regs(regs);
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print_backtrace((unsigned long *)regs->gpr[1]);
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panic("Alignment Exception");
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}
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void ProgramCheckException(struct pt_regs *regs)
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{
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show_regs(regs);
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print_backtrace((unsigned long *)regs->gpr[1]);
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panic("Program Check Exception");
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}
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void SoftEmuException(struct pt_regs *regs)
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{
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show_regs(regs);
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print_backtrace((unsigned long *)regs->gpr[1]);
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panic("Software Emulation Exception");
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}
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void UnknownException(struct pt_regs *regs)
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{
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printf("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
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regs->nip, regs->msr, regs->trap);
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_exception(0, regs);
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}
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void DebugException(struct pt_regs *regs)
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{
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printf("Debugger trap at @ %lx\n", regs->nip);
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show_regs(regs);
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}
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