+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Port on Texas Instruments TMS320C6x architecture
- *
- * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
- * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
- */
-#include <linux/module.h>
-#include <linux/ptrace.h>
-#include <linux/sched/debug.h>
-#include <linux/bug.h>
-
-#include <asm/soc.h>
-#include <asm/special_insns.h>
-#include <asm/traps.h>
-
-int (*c6x_nmi_handler)(struct pt_regs *regs);
-
-void __init trap_init(void)
-{
- ack_exception(EXCEPT_TYPE_NXF);
- ack_exception(EXCEPT_TYPE_EXC);
- ack_exception(EXCEPT_TYPE_IXF);
- ack_exception(EXCEPT_TYPE_SXF);
- enable_exception();
-}
-
-void show_regs(struct pt_regs *regs)
-{
- pr_err("\n");
- show_regs_print_info(KERN_ERR);
- pr_err("PC: %08lx SP: %08lx\n", regs->pc, regs->sp);
- pr_err("Status: %08lx ORIG_A4: %08lx\n", regs->csr, regs->orig_a4);
- pr_err("A0: %08lx B0: %08lx\n", regs->a0, regs->b0);
- pr_err("A1: %08lx B1: %08lx\n", regs->a1, regs->b1);
- pr_err("A2: %08lx B2: %08lx\n", regs->a2, regs->b2);
- pr_err("A3: %08lx B3: %08lx\n", regs->a3, regs->b3);
- pr_err("A4: %08lx B4: %08lx\n", regs->a4, regs->b4);
- pr_err("A5: %08lx B5: %08lx\n", regs->a5, regs->b5);
- pr_err("A6: %08lx B6: %08lx\n", regs->a6, regs->b6);
- pr_err("A7: %08lx B7: %08lx\n", regs->a7, regs->b7);
- pr_err("A8: %08lx B8: %08lx\n", regs->a8, regs->b8);
- pr_err("A9: %08lx B9: %08lx\n", regs->a9, regs->b9);
- pr_err("A10: %08lx B10: %08lx\n", regs->a10, regs->b10);
- pr_err("A11: %08lx B11: %08lx\n", regs->a11, regs->b11);
- pr_err("A12: %08lx B12: %08lx\n", regs->a12, regs->b12);
- pr_err("A13: %08lx B13: %08lx\n", regs->a13, regs->b13);
- pr_err("A14: %08lx B14: %08lx\n", regs->a14, regs->dp);
- pr_err("A15: %08lx B15: %08lx\n", regs->a15, regs->sp);
- pr_err("A16: %08lx B16: %08lx\n", regs->a16, regs->b16);
- pr_err("A17: %08lx B17: %08lx\n", regs->a17, regs->b17);
- pr_err("A18: %08lx B18: %08lx\n", regs->a18, regs->b18);
- pr_err("A19: %08lx B19: %08lx\n", regs->a19, regs->b19);
- pr_err("A20: %08lx B20: %08lx\n", regs->a20, regs->b20);
- pr_err("A21: %08lx B21: %08lx\n", regs->a21, regs->b21);
- pr_err("A22: %08lx B22: %08lx\n", regs->a22, regs->b22);
- pr_err("A23: %08lx B23: %08lx\n", regs->a23, regs->b23);
- pr_err("A24: %08lx B24: %08lx\n", regs->a24, regs->b24);
- pr_err("A25: %08lx B25: %08lx\n", regs->a25, regs->b25);
- pr_err("A26: %08lx B26: %08lx\n", regs->a26, regs->b26);
- pr_err("A27: %08lx B27: %08lx\n", regs->a27, regs->b27);
- pr_err("A28: %08lx B28: %08lx\n", regs->a28, regs->b28);
- pr_err("A29: %08lx B29: %08lx\n", regs->a29, regs->b29);
- pr_err("A30: %08lx B30: %08lx\n", regs->a30, regs->b30);
- pr_err("A31: %08lx B31: %08lx\n", regs->a31, regs->b31);
-}
-
-void die(char *str, struct pt_regs *fp, int nr)
-{
- console_verbose();
- pr_err("%s: %08x\n", str, nr);
- show_regs(fp);
-
- pr_err("Process %s (pid: %d, stackpage=%08lx)\n",
- current->comm, current->pid, (PAGE_SIZE +
- (unsigned long) current));
-
- dump_stack();
- while (1)
- ;
-}
-
-static void die_if_kernel(char *str, struct pt_regs *fp, int nr)
-{
- if (user_mode(fp))
- return;
-
- die(str, fp, nr);
-}
-
-
-/* Internal exceptions */
-static struct exception_info iexcept_table[10] = {
- { "Oops - instruction fetch", SIGBUS, BUS_ADRERR },
- { "Oops - fetch packet", SIGBUS, BUS_ADRERR },
- { "Oops - execute packet", SIGILL, ILL_ILLOPC },
- { "Oops - undefined instruction", SIGILL, ILL_ILLOPC },
- { "Oops - resource conflict", SIGILL, ILL_ILLOPC },
- { "Oops - resource access", SIGILL, ILL_PRVREG },
- { "Oops - privilege", SIGILL, ILL_PRVOPC },
- { "Oops - loops buffer", SIGILL, ILL_ILLOPC },
- { "Oops - software exception", SIGILL, ILL_ILLTRP },
- { "Oops - unknown exception", SIGILL, ILL_ILLOPC }
-};
-
-/* External exceptions */
-static struct exception_info eexcept_table[128] = {
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
-
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
-
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
-
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - external exception", SIGBUS, BUS_ADRERR },
- { "Oops - CPU memory protection fault", SIGSEGV, SEGV_ACCERR },
- { "Oops - CPU memory protection fault in L1P", SIGSEGV, SEGV_ACCERR },
- { "Oops - DMA memory protection fault in L1P", SIGSEGV, SEGV_ACCERR },
- { "Oops - CPU memory protection fault in L1D", SIGSEGV, SEGV_ACCERR },
- { "Oops - DMA memory protection fault in L1D", SIGSEGV, SEGV_ACCERR },
- { "Oops - CPU memory protection fault in L2", SIGSEGV, SEGV_ACCERR },
- { "Oops - DMA memory protection fault in L2", SIGSEGV, SEGV_ACCERR },
- { "Oops - EMC CPU memory protection fault", SIGSEGV, SEGV_ACCERR },
- { "Oops - EMC bus error", SIGBUS, BUS_ADRERR }
-};
-
-static void do_trap(struct exception_info *except_info, struct pt_regs *regs)
-{
- unsigned long addr = instruction_pointer(regs);
-
- if (except_info->code != TRAP_BRKPT)
- pr_err("TRAP: %s PC[0x%lx] signo[%d] code[%d]\n",
- except_info->kernel_str, regs->pc,
- except_info->signo, except_info->code);
-
- die_if_kernel(except_info->kernel_str, regs, addr);
-
- force_sig_fault(except_info->signo, except_info->code,
- (void __user *)addr);
-}
-
-/*
- * Process an internal exception (non maskable)
- */
-static int process_iexcept(struct pt_regs *regs)
-{
- unsigned int iexcept_report = get_iexcept();
- unsigned int iexcept_num;
-
- ack_exception(EXCEPT_TYPE_IXF);
-
- pr_err("IEXCEPT: PC[0x%lx]\n", regs->pc);
-
- while (iexcept_report) {
- iexcept_num = __ffs(iexcept_report);
- iexcept_report &= ~(1 << iexcept_num);
- set_iexcept(iexcept_report);
- if (*(unsigned int *)regs->pc == BKPT_OPCODE) {
- /* This is a breakpoint */
- struct exception_info bkpt_exception = {
- "Oops - undefined instruction",
- SIGTRAP, TRAP_BRKPT
- };
- do_trap(&bkpt_exception, regs);
- iexcept_report &= ~(0xFF);
- set_iexcept(iexcept_report);
- continue;
- }
-
- do_trap(&iexcept_table[iexcept_num], regs);
- }
- return 0;
-}
-
-/*
- * Process an external exception (maskable)
- */
-static void process_eexcept(struct pt_regs *regs)
-{
- int evt;
-
- pr_err("EEXCEPT: PC[0x%lx]\n", regs->pc);
-
- while ((evt = soc_get_exception()) >= 0)
- do_trap(&eexcept_table[evt], regs);
-
- ack_exception(EXCEPT_TYPE_EXC);
-}
-
-/*
- * Main exception processing
- */
-asmlinkage int process_exception(struct pt_regs *regs)
-{
- unsigned int type;
- unsigned int type_num;
- unsigned int ie_num = 9; /* default is unknown exception */
-
- while ((type = get_except_type()) != 0) {
- type_num = fls(type) - 1;
-
- switch (type_num) {
- case EXCEPT_TYPE_NXF:
- ack_exception(EXCEPT_TYPE_NXF);
- if (c6x_nmi_handler)
- (c6x_nmi_handler)(regs);
- else
- pr_alert("NMI interrupt!\n");
- break;
-
- case EXCEPT_TYPE_IXF:
- if (process_iexcept(regs))
- return 1;
- break;
-
- case EXCEPT_TYPE_EXC:
- process_eexcept(regs);
- break;
-
- case EXCEPT_TYPE_SXF:
- ie_num = 8;
- default:
- ack_exception(type_num);
- do_trap(&iexcept_table[ie_num], regs);
- break;
- }
- }
- return 0;
-}
-
-static int kstack_depth_to_print = 48;
-
-static void show_trace(unsigned long *stack, unsigned long *endstack,
- const char *loglvl)
-{
- unsigned long addr;
- int i;
-
- printk("%sCall trace:", loglvl);
- i = 0;
- while (stack + 1 <= endstack) {
- addr = *stack++;
- /*
- * If the address is either in the text segment of the
- * kernel, or in the region which contains vmalloc'ed
- * memory, it *may* be the address of a calling
- * routine; if so, print it so that someone tracing
- * down the cause of the crash will be able to figure
- * out the call path that was taken.
- */
- if (__kernel_text_address(addr)) {
-#ifndef CONFIG_KALLSYMS
- if (i % 5 == 0)
- printk("%s\n ", loglvl);
-#endif
- printk("%s [<%08lx>] %pS\n", loglvl, addr, (void *)addr);
- i++;
- }
- }
- printk("%s\n", loglvl);
-}
-
-void show_stack(struct task_struct *task, unsigned long *stack,
- const char *loglvl)
-{
- unsigned long *p, *endstack;
- int i;
-
- if (!stack) {
- if (task && task != current)
- /* We know this is a kernel stack,
- so this is the start/end */
- stack = (unsigned long *)thread_saved_ksp(task);
- else
- stack = (unsigned long *)&stack;
- }
- endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1)
- & -THREAD_SIZE);
-
- pr_debug("Stack from %08lx:", (unsigned long)stack);
- for (i = 0, p = stack; i < kstack_depth_to_print; i++) {
- if (p + 1 > endstack)
- break;
- if (i % 8 == 0)
- pr_cont("\n ");
- pr_cont(" %08lx", *p++);
- }
- pr_cont("\n");
- show_trace(stack, endstack, loglvl);
-}
-
-int is_valid_bugaddr(unsigned long addr)
-{
- return __kernel_text_address(addr);
-}
projects / linux-2.6-block.git / blobdiff