mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
a47a12becf
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 <sr@denx.de> Acked-by: Wolfgang Denk <wd@denx.de> Acked-by: Detlev Zundel <dzu@denx.de> Acked-by: Kim Phillips <kim.phillips@freescale.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Anatolij Gustschin <agust@denx.de>
267 lines
6.0 KiB
C
267 lines
6.0 KiB
C
/*
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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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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* This file handles the architecture-dependent parts of hardware
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* exceptions
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*/
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#include <common.h>
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#include <command.h>
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#include <kgdb.h>
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#include <asm/processor.h>
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#include <asm/mpc8349_pci.h>
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DECLARE_GLOBAL_DATA_PTR;
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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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#define END_OF_MEM (gd->bd->bi_memstart + gd->bd->bi_memsize)
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/*
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* Trap & Exception support
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*/
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void
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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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puts ("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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putc ('\n');
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printf("%08lX ", i);
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if (cnt > 32) break;
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sp = (unsigned long *)*sp;
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}
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putc ('\n');
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}
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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, regs->msr&MSR_PR ? 1 : 0,
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regs->msr & MSR_FP ? 1 : 0,regs->msr&MSR_ME ? 1 : 0,
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regs->msr&MSR_IR ? 1 : 0,
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regs->msr&MSR_DR ? 1 : 0);
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putc ('\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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}
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printf("%08lX ", regs->gpr[i]);
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if ((i % 8) == 7) {
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putc ('\n');
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}
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}
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}
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void
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_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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#ifdef CONFIG_PCI
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void dump_pci (void)
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{
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/*
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volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
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printf ("PCI: err status %x err mask %x err ctrl %x\n",
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le32_to_cpu (immap->im_pci.pci_esr),
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le32_to_cpu (immap->im_pci.pci_emr),
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le32_to_cpu (immap->im_pci.pci_ecr));
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printf (" error address %x error data %x ctrl %x\n",
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le32_to_cpu (immap->im_pci.pci_eacr),
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le32_to_cpu (immap->im_pci.pci_edcr),
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le32_to_cpu (immap->im_pci.pci_eccr));
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*/
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}
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#endif
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void
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MachineCheckException(struct pt_regs *regs)
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{
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unsigned long fixup;
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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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#ifdef CONFIG_PCI
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#if 0
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volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
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#ifdef DEBUG
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dump_pci();
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#endif
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/* clear the error in the error status register */
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if(immap->im_pci.pci_esr & cpu_to_le32(PCI_ERROR_PCI_NO_RSP)) {
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immap->im_pci.pci_esr = cpu_to_le32(PCI_ERROR_PCI_NO_RSP);
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return;
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}
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#endif
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#endif /* CONFIG_PCI */
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if ((fixup = search_exception_table(regs->nip)) != 0) {
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regs->nip = fixup;
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return;
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}
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#if defined(CONFIG_CMD_KGDB)
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if (debugger_exception_handler && (*debugger_exception_handler)(regs))
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return;
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#endif
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puts ("Machine check in kernel mode.\n"
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"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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puts ("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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puts ("Transfer error ack signal\n");
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break;
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case (0x80000000>>14):
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puts ("Data parity signal\n");
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break;
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case (0x80000000>>15):
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puts ("Address parity signal\n");
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break;
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default:
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puts ("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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#ifdef CONFIG_PCI
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dump_pci();
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#endif
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panic("machine check");
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}
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void
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AlignmentException(struct pt_regs *regs)
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{
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#if defined(CONFIG_CMD_KGDB)
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if (debugger_exception_handler && (*debugger_exception_handler)(regs))
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return;
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#endif
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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
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ProgramCheckException(struct pt_regs *regs)
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{
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#if defined(CONFIG_CMD_KGDB)
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if (debugger_exception_handler && (*debugger_exception_handler)(regs))
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return;
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#endif
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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
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SoftEmuException(struct pt_regs *regs)
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{
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#if defined(CONFIG_CMD_KGDB)
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if (debugger_exception_handler && (*debugger_exception_handler)(regs))
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return;
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#endif
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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
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UnknownException(struct pt_regs *regs)
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{
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#if defined(CONFIG_CMD_KGDB)
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if (debugger_exception_handler && (*debugger_exception_handler)(regs))
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return;
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#endif
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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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#if defined(CONFIG_CMD_BEDBUG)
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extern void do_bedbug_breakpoint(struct pt_regs *);
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#endif
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void
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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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#if defined(CONFIG_CMD_BEDBUG)
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do_bedbug_breakpoint( regs );
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#endif
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}
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/* Probe an address by reading. If not present, return -1, otherwise
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* return 0.
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*/
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int
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addr_probe(uint *addr)
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{
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#if 0
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int retval;
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__asm__ __volatile__( \
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"1: lwz %0,0(%1)\n" \
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" eieio\n" \
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" li %0,0\n" \
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"2:\n" \
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".section .fixup,\"ax\"\n" \
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"3: li %0,-1\n" \
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" b 2b\n" \
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".section __ex_table,\"a\"\n" \
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" .align 2\n" \
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" .long 1b,3b\n" \
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".text" \
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: "=r" (retval) : "r"(addr));
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return (retval);
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#endif
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return 0;
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}
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