From a47a12becf66f02a56da91c161e2edb625e9f20c Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Thu, 15 Apr 2010 16:07:28 +0200 Subject: Move arch/ppc to arch/powerpc As discussed on the list, move "arch/ppc" to "arch/powerpc" to better match the Linux directory structure. Please note that this patch also changes the "ppc" target in MAKEALL to "powerpc" to match this new infrastructure. But "ppc" is kept as an alias for now, to not break compatibility with scripts using this name. Signed-off-by: Stefan Roese Acked-by: Wolfgang Denk Acked-by: Detlev Zundel Acked-by: Kim Phillips Cc: Peter Tyser Cc: Anatolij Gustschin --- arch/powerpc/cpu/mpc8xx/traps.c | 241 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 241 insertions(+) create mode 100644 arch/powerpc/cpu/mpc8xx/traps.c (limited to 'arch/powerpc/cpu/mpc8xx/traps.c') diff --git a/arch/powerpc/cpu/mpc8xx/traps.c b/arch/powerpc/cpu/mpc8xx/traps.c new file mode 100644 index 0000000..343dced --- /dev/null +++ b/arch/powerpc/cpu/mpc8xx/traps.c @@ -0,0 +1,241 @@ +/* + * 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. + * + * 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 + */ + +/* + * This file handles the architecture-dependent parts of hardware exceptions + */ + +#include +#include +#include +#include + +#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); + +/* THIS NEEDS CHANGING to use the board info structure. +*/ +#define END_OF_MEM 0x02000000 + +/* + * Trap & Exception support + */ + +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"); + } + } +} + + +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; + + /* 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) { + 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("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) +{ +#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; +} -- cgit v1.1