+++ /dev/null
-/*
- * (C) Copyright 2000 - 2007
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * 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
- *
- * Derived from the MPC83xx code.
- */
-
-/*
- * This file handles the architecture-dependent parts of hardware
- * exceptions
- */
-
-#include <common.h>
-#include <kgdb.h>
-#include <asm/processor.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-extern unsigned long search_exception_table(unsigned long);
-
-/*
- * End of addressable memory. This may be less than the actual
- * amount of memory on the system if we're unable to keep all
- * the memory mapped in.
- */
-extern ulong get_effective_memsize(void);
-#define END_OF_MEM (gd->bd->bi_memstart + get_effective_memsize())
-
-/*
- * Trap & Exception support
- */
-
-void
-print_backtrace (unsigned long *sp)
-{
- int cnt = 0;
- unsigned long i;
-
- puts ("Call backtrace: ");
- while (sp) {
- if ((uint)sp > END_OF_MEM)
- break;
-
- i = sp[1];
- if (cnt++ % 7 == 0)
- putc ('\n');
- printf ("%08lX ", i);
- if (cnt > 32) break;
- sp = (unsigned long *) *sp;
- }
- putc ('\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);
-
- putc ('\n');
- for (i = 0; i < 32; i++) {
- if ((i % 8) == 0) {
- printf ("GPR%02d: ", i);
- }
-
- printf ("%08lX ", regs->gpr[i]);
- if ((i % 8) == 7) {
- putc ('\n');
- }
- }
-}
-
-
-void
-_exception (int signr, struct pt_regs *regs)
-{
- show_regs (regs);
- print_backtrace ((unsigned long *)regs->gpr[1]);
- panic ("Exception at pc %lx signal %d", regs->nip,signr);
-}
-
-
-void
-MachineCheckException (struct pt_regs *regs)
-{
- unsigned long fixup;
-
- if ((fixup = search_exception_table (regs->nip)) != 0) {
- regs->nip = fixup;
- return;
- }
-
-#ifdef CONFIG_CMD_KGDB
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
-
- puts ("Machine check.\nCaused by (from msr): ");
- printf ("regs %p ",regs);
- switch (regs->msr & 0x00FF0000) {
- case (0x80000000 >> 10):
- puts ("Instruction cache parity signal\n");
- break;
- case (0x80000000 >> 11):
- puts ("Data cache parity signal\n");
- break;
- case (0x80000000 >> 12):
- puts ("Machine check signal\n");
- break;
- case (0x80000000 >> 13):
- puts ("Transfer error ack signal\n");
- break;
- case (0x80000000 >> 14):
- puts ("Data parity signal\n");
- break;
- case (0x80000000 >> 15):
- puts ("Address parity signal\n");
- break;
- default:
- puts ("Unknown values in msr\n");
- }
- show_regs (regs);
- print_backtrace ((unsigned long *)regs->gpr[1]);
-
- panic ("machine check");
-}
-
-void
-AlignmentException (struct pt_regs *regs)
-{
-#ifdef 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)
-{
-#ifdef 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)
-{
-#ifdef 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)
-{
-#ifdef 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);
-}
-
-#ifdef CONFIG_CMD_BEDBUG
-extern void do_bedbug_breakpoint (struct pt_regs *);
-#endif
-
-void
-DebugException (struct pt_regs *regs)
-{
- printf ("Debugger trap at @ %lx\n", regs->nip );
- show_regs (regs);
-#ifdef CONFIG_CMD_BEDBUG
- do_bedbug_breakpoint (regs);
-#endif
-}
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