bd0b9ac405
Most interrupt flow handlers do not use the irq argument. Those few which use it can retrieve the irq number from the irq descriptor. Remove the argument. Search and replace was done with coccinelle and some extra helper scripts around it. Thanks to Julia for her help! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Jiang Liu <jiang.liu@linux.intel.com>
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
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* Copyright 2005-2009 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later
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*/
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#include <linux/kernel_stat.h>
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#include <linux/module.h>
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#include <linux/random.h>
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#include <linux/seq_file.h>
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#include <linux/kallsyms.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/seq_file.h>
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#include <asm/irq_handler.h>
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#include <asm/trace.h>
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#include <asm/pda.h>
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static atomic_t irq_err_count;
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void ack_bad_irq(unsigned int irq)
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{
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atomic_inc(&irq_err_count);
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printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
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}
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static struct irq_desc bad_irq_desc = {
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.handle_irq = handle_bad_irq,
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.lock = __RAW_SPIN_LOCK_UNLOCKED(bad_irq_desc.lock),
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};
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#ifdef CONFIG_CPUMASK_OFFSTACK
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/* We are not allocating a variable-sized bad_irq_desc.affinity */
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#error "Blackfin architecture does not support CONFIG_CPUMASK_OFFSTACK."
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#endif
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#ifdef CONFIG_PROC_FS
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int arch_show_interrupts(struct seq_file *p, int prec)
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{
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int j;
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seq_printf(p, "%*s: ", prec, "NMI");
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for_each_online_cpu(j)
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seq_printf(p, "%10u ", cpu_pda[j].__nmi_count);
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seq_printf(p, " CORE Non Maskable Interrupt\n");
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seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
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return 0;
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}
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#endif
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#ifdef CONFIG_DEBUG_STACKOVERFLOW
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static void check_stack_overflow(int irq)
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{
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/* Debugging check for stack overflow: is there less than STACK_WARN free? */
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long sp = __get_SP() & (THREAD_SIZE - 1);
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if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
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dump_stack();
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pr_emerg("irq%i: possible stack overflow only %ld bytes free\n",
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irq, sp - sizeof(struct thread_info));
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}
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}
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#else
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static inline void check_stack_overflow(int irq) { }
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#endif
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#ifndef CONFIG_IPIPE
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static void maybe_lower_to_irq14(void)
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{
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unsigned short pending, other_ints;
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/*
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* If we're the only interrupt running (ignoring IRQ15 which
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* is for syscalls), lower our priority to IRQ14 so that
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* softirqs run at that level. If there's another,
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* lower-level interrupt, irq_exit will defer softirqs to
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* that. If the interrupt pipeline is enabled, we are already
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* running at IRQ14 priority, so we don't need this code.
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*/
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CSYNC();
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pending = bfin_read_IPEND() & ~0x8000;
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other_ints = pending & (pending - 1);
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if (other_ints == 0)
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lower_to_irq14();
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}
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#else
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static inline void maybe_lower_to_irq14(void) { }
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#endif
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/*
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* do_IRQ handles all hardware IRQs. Decoded IRQs should not
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* come via this function. Instead, they should provide their
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* own 'handler'
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*/
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#ifdef CONFIG_DO_IRQ_L1
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__attribute__((l1_text))
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#endif
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asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
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{
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struct pt_regs *old_regs = set_irq_regs(regs);
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irq_enter();
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check_stack_overflow(irq);
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/*
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* Some hardware gives randomly wrong interrupts. Rather
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* than crashing, do something sensible.
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*/
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if (irq >= NR_IRQS)
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handle_bad_irq(&bad_irq_desc);
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else
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generic_handle_irq(irq);
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maybe_lower_to_irq14();
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irq_exit();
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set_irq_regs(old_regs);
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}
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void __init init_IRQ(void)
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{
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init_arch_irq();
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#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
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/* Now that evt_ivhw is set up, turn this on */
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trace_buff_offset = 0;
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bfin_write_TBUFCTL(BFIN_TRACE_ON);
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printk(KERN_INFO "Hardware Trace expanded to %ik\n",
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1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN);
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#endif
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}
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