summaryrefslogtreecommitdiff
path: root/arch/cris/kernel/irq.c
diff options
context:
space:
mode:
authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/cris/kernel/irq.c
Initial import
Diffstat (limited to 'arch/cris/kernel/irq.c')
-rw-r--r--arch/cris/kernel/irq.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/cris/kernel/irq.c b/arch/cris/kernel/irq.c
new file mode 100644
index 000000000..dd0be5de5
--- /dev/null
+++ b/arch/cris/kernel/irq.c
@@ -0,0 +1,66 @@
+/*
+ *
+ * linux/arch/cris/kernel/irq.c
+ *
+ * Copyright (c) 2000,2007 Axis Communications AB
+ *
+ * Authors: Bjorn Wesen (bjornw@axis.com)
+ *
+ * This file contains the code used by various IRQ handling routines:
+ * asking for different IRQs should be done through these routines
+ * instead of just grabbing them. Thus setups with different IRQ numbers
+ * shouldn't result in any weird surprises, and installing new handlers
+ * should be easier.
+ *
+ */
+
+/*
+ * IRQs are in fact implemented a bit like signal handlers for the kernel.
+ * Naturally it's not a 1:1 relation, but there are similarities.
+ */
+
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/irq.h>
+
+#include <linux/kernel_stat.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/timex.h>
+#include <linux/random.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/errno.h>
+#include <linux/spinlock.h>
+
+#include <asm/io.h>
+#include <arch/system.h>
+
+/* called by the assembler IRQ entry functions defined in irq.h
+ * to dispatch the interrupts to registered handlers
+ */
+
+asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
+{
+ unsigned long sp;
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ irq_enter();
+ sp = rdsp();
+ if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) {
+ printk("do_IRQ: stack overflow: %lX\n", sp);
+ show_stack(NULL, (unsigned long *)sp);
+ }
+ generic_handle_irq(irq);
+ irq_exit();
+ set_irq_regs(old_regs);
+}
+
+void weird_irq(void)
+{
+ local_irq_disable();
+ printk("weird irq\n");
+ while(1);
+}
+