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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh/kernel/irq.c
downloadlinux-stericsson-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sh/kernel/irq.c')
-rw-r--r--arch/sh/kernel/irq.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
new file mode 100644
index 000000000000..54c171225b78
--- /dev/null
+++ b/arch/sh/kernel/irq.c
@@ -0,0 +1,106 @@
+/* $Id: irq.c,v 1.20 2004/01/13 05:52:11 kkojima Exp $
+ *
+ * linux/arch/sh/kernel/irq.c
+ *
+ * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ *
+ *
+ * SuperH version: Copyright (C) 1999 Niibe Yutaka
+ */
+
+/*
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/errno.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/mm.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/kallsyms.h>
+#include <linux/bitops.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/pgalloc.h>
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <linux/irq.h>
+
+
+/*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves, it doesn't deserve
+ * a generic callback i think.
+ */
+void ack_bad_irq(unsigned int irq)
+{
+ printk("unexpected IRQ trap at vector %02x\n", irq);
+}
+
+#if defined(CONFIG_PROC_FS)
+int show_interrupts(struct seq_file *p, void *v)
+{
+ int i = *(loff_t *) v, j;
+ struct irqaction * action;
+ unsigned long flags;
+
+ if (i == 0) {
+ seq_puts(p, " ");
+ for (j=0; j<NR_CPUS; j++)
+ if (cpu_online(j))
+ seq_printf(p, "CPU%d ",j);
+ seq_putc(p, '\n');
+ }
+
+ if (i < ACTUAL_NR_IRQS) {
+ spin_lock_irqsave(&irq_desc[i].lock, flags);
+ action = irq_desc[i].action;
+ if (!action)
+ goto unlock;
+ seq_printf(p, "%3d: ",i);
+ seq_printf(p, "%10u ", kstat_irqs(i));
+ seq_printf(p, " %14s", irq_desc[i].handler->typename);
+ seq_printf(p, " %s", action->name);
+
+ for (action=action->next; action; action = action->next)
+ seq_printf(p, ", %s", action->name);
+ seq_putc(p, '\n');
+unlock:
+ spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+ }
+ return 0;
+}
+#endif
+
+asmlinkage int do_IRQ(unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7,
+ struct pt_regs regs)
+{
+ int irq;
+
+ irq_enter();
+ asm volatile("stc r2_bank, %0\n\t"
+ "shlr2 %0\n\t"
+ "shlr2 %0\n\t"
+ "shlr %0\n\t"
+ "add #-16, %0\n\t"
+ :"=z" (irq));
+ irq = irq_demux(irq);
+ __do_IRQ(irq, &regs);
+ irq_exit();
+ return 1;
+}