mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 11:16:15 +09:00
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>
217 lines
4.9 KiB
C
217 lines
4.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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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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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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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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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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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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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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#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 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 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 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 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 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 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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