+++ /dev/null
-/*
- * 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.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-/*
- * This file handles the architecture-dependent parts of hardware exceptions
- */
-
-#include <common.h>
-#include <command.h>
-#include <kgdb.h>
-#include <asm/processor.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/* 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 (gd->bd->bi_memstart + gd->bd->bi_memsize)
-
-static __inline__ unsigned long get_esr(void)
-{
- unsigned long val;
-
-#if defined(CONFIG_440)
- asm volatile("mfspr %0, 0x03e" : "=r" (val) :);
-#else
- asm volatile("mfesr %0" : "=r" (val) :);
-#endif
- return val;
-}
-
-#define ESR_MCI 0x80000000
-#define ESR_PIL 0x08000000
-#define ESR_PPR 0x04000000
-#define ESR_PTR 0x02000000
-#define ESR_DST 0x00800000
-#define ESR_DIZ 0x00400000
-#define ESR_U0F 0x00008000
-
-#if defined(CONFIG_CMD_BEDBUG)
-extern void do_bedbug_breakpoint(struct pt_regs *);
-#endif
-
-/*
- * 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 DEAR: %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");
-}
-
-void MachineCheckException(struct pt_regs *regs)
-{
- unsigned long fixup, val;
-#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
- u32 value2;
- int corr_ecc = 0;
- int uncorr_ecc = 0;
-#endif
-
- if ((fixup = search_exception_table(regs->nip)) != 0) {
- regs->nip = fixup;
- val = mfspr(MCSR);
- /* Clear MCSR */
- mtspr(SPRN_MCSR, val);
- return;
- }
-
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
-
- printf("Machine Check Exception.\n");
- printf("Caused by (from msr): ");
- printf("regs %p ", regs);
-
- val = get_esr();
-
-#if !defined(CONFIG_440) && !defined(CONFIG_405EX)
- if (val& ESR_IMCP) {
- printf("Instruction");
- mtspr(ESR, val & ~ESR_IMCP);
- } else {
- printf("Data");
- }
- printf(" machine check.\n");
-
-#elif defined(CONFIG_440) || defined(CONFIG_405EX)
- if (val& ESR_IMCP){
- printf("Instruction Synchronous Machine Check exception\n");
- mtspr(SPRN_ESR, val & ~ESR_IMCP);
- } else {
- val = mfspr(MCSR);
- if (val & MCSR_IB)
- printf("Instruction Read PLB Error\n");
-#if defined(CONFIG_440)
- if (val & MCSR_DRB)
- printf("Data Read PLB Error\n");
- if (val & MCSR_DWB)
- printf("Data Write PLB Error\n");
-#else
- if (val & MCSR_DB)
- printf("Data PLB Error\n");
-#endif
- if (val & MCSR_TLBP)
- printf("TLB Parity Error\n");
- if (val & MCSR_ICP){
- /*flush_instruction_cache(); */
- printf("I-Cache Parity Error\n");
- }
- if (val & MCSR_DCSP)
- printf("D-Cache Search Parity Error\n");
- if (val & MCSR_DCFP)
- printf("D-Cache Flush Parity Error\n");
- if (val & MCSR_IMPE)
- printf("Machine Check exception is imprecise\n");
-
- /* Clear MCSR */
- mtspr(SPRN_MCSR, val);
- }
-
-#if defined(CONFIG_DDR_ECC) && defined(CONFIG_SDRAM_PPC4xx_IBM_DDR2)
- /*
- * Read and print ECC status register/info:
- * The faulting address is only known upon uncorrectable ECC
- * errors.
- */
- mfsdram(SDRAM_ECCES, val);
- if (val & SDRAM_ECCES_CE)
- printf("ECC: Correctable error\n");
- if (val & SDRAM_ECCES_UE) {
- printf("ECC: Uncorrectable error at 0x%02x%08x\n",
- mfdcr(SDRAM_ERRADDULL), mfdcr(SDRAM_ERRADDLLL));
- }
-#endif /* CONFIG_DDR_ECC ... */
-
-#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
- mfsdram(DDR0_00, val) ;
- printf("DDR0: DDR0_00 %lx\n", val);
- val = (val >> 16) & 0xff;
- if (val & 0x80)
- printf("DDR0: At least one interrupt active\n");
- if (val & 0x40)
- printf("DDR0: DRAM initialization complete.\n");
- if (val & 0x20) {
- printf("DDR0: Multiple uncorrectable ECC events.\n");
- uncorr_ecc = 1;
- }
- if (val & 0x10) {
- printf("DDR0: Single uncorrectable ECC event.\n");
- uncorr_ecc = 1;
- }
- if (val & 0x08) {
- printf("DDR0: Multiple correctable ECC events.\n");
- corr_ecc = 1;
- }
- if (val & 0x04) {
- printf("DDR0: Single correctable ECC event.\n");
- corr_ecc = 1;
- }
- if (val & 0x02)
- printf("Multiple accesses outside the defined"
- " physical memory space detected\n");
- if (val & 0x01)
- printf("DDR0: Single access outside the defined"
- " physical memory space detected.\n");
-
- mfsdram(DDR0_01, val);
- val = (val >> 8) & 0x7;
- switch (val ) {
- case 0:
- printf("DDR0: Write Out-of-Range command\n");
- break;
- case 1:
- printf("DDR0: Read Out-of-Range command\n");
- break;
- case 2:
- printf("DDR0: Masked write Out-of-Range command\n");
- break;
- case 4:
- printf("DDR0: Wrap write Out-of-Range command\n");
- break;
- case 5:
- printf("DDR0: Wrap read Out-of-Range command\n");
- break;
- default:
- mfsdram(DDR0_01, value2);
- printf("DDR0: No DDR0 error know 0x%lx %x\n", val, value2);
- }
- mfsdram(DDR0_23, val);
- if (((val >> 16) & 0xff) && corr_ecc)
- printf("DDR0: Syndrome for correctable ECC event 0x%lx\n",
- (val >> 16) & 0xff);
- mfsdram(DDR0_23, val);
- if (((val >> 8) & 0xff) && uncorr_ecc)
- printf("DDR0: Syndrome for uncorrectable ECC event 0x%lx\n",
- (val >> 8) & 0xff);
- mfsdram(DDR0_33, val);
- if (val)
- printf("DDR0: Address of command that caused an "
- "Out-of-Range interrupt %lx\n", val);
- mfsdram(DDR0_34, val);
- if (val && uncorr_ecc)
- printf("DDR0: Address of uncorrectable ECC event %lx\n", val);
- mfsdram(DDR0_35, val);
- if (val && uncorr_ecc)
- printf("DDR0: Address of uncorrectable ECC event %lx\n", val);
- mfsdram(DDR0_36, val);
- if (val && uncorr_ecc)
- printf("DDR0: Data of uncorrectable ECC event 0x%08lx\n", val);
- mfsdram(DDR0_37, val);
- if (val && uncorr_ecc)
- printf("DDR0: Data of uncorrectable ECC event 0x%08lx\n", val);
- mfsdram(DDR0_38, val);
- if (val && corr_ecc)
- printf("DDR0: Address of correctable ECC event %lx\n", val);
- mfsdram(DDR0_39, val);
- if (val && corr_ecc)
- printf("DDR0: Address of correctable ECC event %lx\n", val);
- mfsdram(DDR0_40, val);
- if (val && corr_ecc)
- printf("DDR0: Data of correctable ECC event 0x%08lx\n", val);
- mfsdram(DDR0_41, val);
- if (val && corr_ecc)
- printf("DDR0: Data of correctable ECC event 0x%08lx\n", val);
-#endif /* CONFIG_440EPX */
-#endif /* CONFIG_440 */
- 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)
-{
- long esr_val;
-
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
-
- show_regs(regs);
-
- esr_val = get_esr();
- if( esr_val & ESR_PIL )
- printf( "** Illegal Instruction **\n" );
- else if( esr_val & ESR_PPR )
- printf( "** Privileged Instruction **\n" );
- else if( esr_val & ESR_PTR )
- printf( "** Trap Instruction **\n" );
-
- print_backtrace((unsigned long *)regs->gpr[1]);
- panic("Program Check Exception");
-}
-
-void DecrementerPITException(struct pt_regs *regs)
-{
- /*
- * Reset PIT interrupt
- */
- mtspr(SPRN_TSR, 0x08000000);
-
- /*
- * Call timer_interrupt routine in interrupts.c
- */
- timer_interrupt(NULL);
-}
-
-
-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;
-}
projects / oweals / u-boot.git / blobdiff