X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Farch%2Fpowerpc%2Fcpu%2Fmpc86xx%2Ftraps.c;fp=qemu%2Froms%2Fu-boot%2Farch%2Fpowerpc%2Fcpu%2Fmpc86xx%2Ftraps.c;h=92fb537453b5f6412c259acb033e018b69b78512;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git diff --git a/qemu/roms/u-boot/arch/powerpc/cpu/mpc86xx/traps.c b/qemu/roms/u-boot/arch/powerpc/cpu/mpc86xx/traps.c new file mode 100644 index 000000000..92fb53745 --- /dev/null +++ b/qemu/roms/u-boot/arch/powerpc/cpu/mpc86xx/traps.c @@ -0,0 +1,207 @@ +/* + * 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. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * This file handles the architecture-dependent parts of hardware exceptions + */ + +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +/* Returns 0 if exception not found and fixup otherwise. */ +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. + */ +#define END_OF_MEM (gd->bd->bi_memstart + get_effective_memsize()) + +/* + * Trap & Exception support + */ + +static 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"); + } + } +} + + +static 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 & 0x001F0000) { + case (0x80000000>>11): + printf("MSS error. MSSSR0: %08x\n", mfspr(SPRN_MSSSR0)); + break; + 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) +{ + unsigned char *p = regs ? (unsigned char *)(regs->nip) : NULL; + int i, j; + +#if defined(CONFIG_CMD_KGDB) + if (debugger_exception_handler && (*debugger_exception_handler) (regs)) + return; +#endif + show_regs(regs); + + p = (unsigned char *)((unsigned long)p & 0xFFFFFFE0); + p -= 32; + for (i = 0; i < 256; i += 16) { + printf("%08x: ", (unsigned int)p + i); + for (j = 0; j < 16; j++) { + printf("%02x ", p[i + j]); + } + printf("\n"); + } + + 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("UnknownException regs@%lx\n", (ulong)regs); + printf("Bad trap at PC: %lx, SR: %lx, vector=%lx\n", + regs->nip, regs->msr, regs->trap); + _exception(0, regs); +} + +/* + * Probe an address by reading. + * If not present, return -1, + * otherwise return 0. + */ +int addr_probe(uint *addr) +{ + return 0; +}