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Diffstat (limited to 'arch/avr32/kernel/traps.c')
-rw-r--r--arch/avr32/kernel/traps.c262
1 files changed, 0 insertions, 262 deletions
diff --git a/arch/avr32/kernel/traps.c b/arch/avr32/kernel/traps.c
deleted file mode 100644
index 50b541325025..000000000000
--- a/arch/avr32/kernel/traps.c
+++ /dev/null
@@ -1,262 +0,0 @@
-/*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/bug.h>
-#include <linux/hardirq.h>
-#include <linux/init.h>
-#include <linux/kallsyms.h>
-#include <linux/kdebug.h>
-#include <linux/extable.h>
-#include <linux/module.h> /* print_modules */
-#include <linux/notifier.h>
-#include <linux/sched/signal.h>
-#include <linux/uaccess.h>
-
-#include <asm/addrspace.h>
-#include <asm/mmu_context.h>
-#include <asm/ocd.h>
-#include <asm/sysreg.h>
-#include <asm/traps.h>
-
-static DEFINE_SPINLOCK(die_lock);
-
-void die(const char *str, struct pt_regs *regs, long err)
-{
- static int die_counter;
-
- console_verbose();
- spin_lock_irq(&die_lock);
- bust_spinlocks(1);
-
- printk(KERN_ALERT "Oops: %s, sig: %ld [#%d]\n",
- str, err, ++die_counter);
-
- printk(KERN_EMERG);
-
-#ifdef CONFIG_PREEMPT
- printk(KERN_CONT "PREEMPT ");
-#endif
-#ifdef CONFIG_FRAME_POINTER
- printk(KERN_CONT "FRAME_POINTER ");
-#endif
- if (current_cpu_data.features & AVR32_FEATURE_OCD) {
- unsigned long did = ocd_read(DID);
- printk(KERN_CONT "chip: 0x%03lx:0x%04lx rev %lu\n",
- (did >> 1) & 0x7ff,
- (did >> 12) & 0x7fff,
- (did >> 28) & 0xf);
- } else {
- printk(KERN_CONT "cpu: arch %u r%u / core %u r%u\n",
- current_cpu_data.arch_type,
- current_cpu_data.arch_revision,
- current_cpu_data.cpu_type,
- current_cpu_data.cpu_revision);
- }
-
- print_modules();
- show_regs_log_lvl(regs, KERN_EMERG);
- show_stack_log_lvl(current, regs->sp, regs, KERN_EMERG);
- bust_spinlocks(0);
- add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
- spin_unlock_irq(&die_lock);
-
- if (in_interrupt())
- panic("Fatal exception in interrupt");
-
- if (panic_on_oops)
- panic("Fatal exception");
-
- do_exit(err);
-}
-
-void _exception(long signr, struct pt_regs *regs, int code,
- unsigned long addr)
-{
- siginfo_t info;
-
- if (!user_mode(regs)) {
- const struct exception_table_entry *fixup;
-
- /* Are we prepared to handle this kernel fault? */
- fixup = search_exception_tables(regs->pc);
- if (fixup) {
- regs->pc = fixup->fixup;
- return;
- }
- die("Unhandled exception in kernel mode", regs, signr);
- }
-
- memset(&info, 0, sizeof(info));
- info.si_signo = signr;
- info.si_code = code;
- info.si_addr = (void __user *)addr;
- force_sig_info(signr, &info, current);
-}
-
-asmlinkage void do_nmi(unsigned long ecr, struct pt_regs *regs)
-{
- int ret;
-
- nmi_enter();
-
- ret = notify_die(DIE_NMI, "NMI", regs, 0, ecr, SIGINT);
- switch (ret) {
- case NOTIFY_OK:
- case NOTIFY_STOP:
- break;
- case NOTIFY_BAD:
- die("Fatal Non-Maskable Interrupt", regs, SIGINT);
- default:
- printk(KERN_ALERT "Got NMI, but nobody cared. Disabling...\n");
- nmi_disable();
- break;
- }
- nmi_exit();
-}
-
-asmlinkage void do_critical_exception(unsigned long ecr, struct pt_regs *regs)
-{
- die("Critical exception", regs, SIGKILL);
-}
-
-asmlinkage void do_address_exception(unsigned long ecr, struct pt_regs *regs)
-{
- _exception(SIGBUS, regs, BUS_ADRALN, regs->pc);
-}
-
-/* This way of handling undefined instructions is stolen from ARM */
-static LIST_HEAD(undef_hook);
-static DEFINE_SPINLOCK(undef_lock);
-
-void register_undef_hook(struct undef_hook *hook)
-{
- spin_lock_irq(&undef_lock);
- list_add(&hook->node, &undef_hook);
- spin_unlock_irq(&undef_lock);
-}
-
-void unregister_undef_hook(struct undef_hook *hook)
-{
- spin_lock_irq(&undef_lock);
- list_del(&hook->node);
- spin_unlock_irq(&undef_lock);
-}
-
-static int do_cop_absent(u32 insn)
-{
- int cop_nr;
- u32 cpucr;
-
- if ((insn & 0xfdf00000) == 0xf1900000)
- /* LDC0 */
- cop_nr = 0;
- else
- cop_nr = (insn >> 13) & 0x7;
-
- /* Try enabling the coprocessor */
- cpucr = sysreg_read(CPUCR);
- cpucr |= (1 << (24 + cop_nr));
- sysreg_write(CPUCR, cpucr);
-
- cpucr = sysreg_read(CPUCR);
- if (!(cpucr & (1 << (24 + cop_nr))))
- return -ENODEV;
-
- return 0;
-}
-
-#ifdef CONFIG_BUG
-int is_valid_bugaddr(unsigned long pc)
-{
- unsigned short opcode;
-
- if (pc < PAGE_OFFSET)
- return 0;
- if (probe_kernel_address((u16 *)pc, opcode))
- return 0;
-
- return opcode == AVR32_BUG_OPCODE;
-}
-#endif
-
-asmlinkage void do_illegal_opcode(unsigned long ecr, struct pt_regs *regs)
-{
- u32 insn;
- struct undef_hook *hook;
- void __user *pc;
- long code;
-
-#ifdef CONFIG_BUG
- if (!user_mode(regs) && (ecr == ECR_ILLEGAL_OPCODE)) {
- enum bug_trap_type type;
-
- type = report_bug(regs->pc, regs);
- switch (type) {
- case BUG_TRAP_TYPE_NONE:
- break;
- case BUG_TRAP_TYPE_WARN:
- regs->pc += 2;
- return;
- case BUG_TRAP_TYPE_BUG:
- die("Kernel BUG", regs, SIGKILL);
- }
- }
-#endif
-
- local_irq_enable();
-
- if (user_mode(regs)) {
- pc = (void __user *)instruction_pointer(regs);
- if (get_user(insn, (u32 __user *)pc))
- goto invalid_area;
-
- if (ecr == ECR_COPROC_ABSENT && !do_cop_absent(insn))
- return;
-
- spin_lock_irq(&undef_lock);
- list_for_each_entry(hook, &undef_hook, node) {
- if ((insn & hook->insn_mask) == hook->insn_val) {
- if (hook->fn(regs, insn) == 0) {
- spin_unlock_irq(&undef_lock);
- return;
- }
- }
- }
- spin_unlock_irq(&undef_lock);
- }
-
- switch (ecr) {
- case ECR_PRIVILEGE_VIOLATION:
- code = ILL_PRVOPC;
- break;
- case ECR_COPROC_ABSENT:
- code = ILL_COPROC;
- break;
- default:
- code = ILL_ILLOPC;
- break;
- }
-
- _exception(SIGILL, regs, code, regs->pc);
- return;
-
-invalid_area:
- _exception(SIGSEGV, regs, SEGV_MAPERR, regs->pc);
-}
-
-asmlinkage void do_fpe(unsigned long ecr, struct pt_regs *regs)
-{
- /* We have no FPU yet */
- _exception(SIGILL, regs, ILL_COPROC, regs->pc);
-}
-
-
-void __init trap_init(void)
-{
-
-}