1 files changed, 178 insertions, 0 deletions

diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
new file mode 100644
index 000000000000..d71e8f00810f
--- /dev/null
+++ b/arch/um/kernel/irq.c
@@ -0,0 +1,178 @@
+/* 
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ * Derived (i.e. mostly copied) from arch/i386/kernel/irq.c:
+ *      Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ */
+
+#include "linux/config.h"
+#include "linux/kernel.h"
+#include "linux/module.h"
+#include "linux/smp.h"
+#include "linux/irq.h"
+#include "linux/kernel_stat.h"
+#include "linux/interrupt.h"
+#include "linux/random.h"
+#include "linux/slab.h"
+#include "linux/file.h"
+#include "linux/proc_fs.h"
+#include "linux/init.h"
+#include "linux/seq_file.h"
+#include "linux/profile.h"
+#include "linux/hardirq.h"
+#include "asm/irq.h"
+#include "asm/hw_irq.h"
+#include "asm/atomic.h"
+#include "asm/signal.h"
+#include "asm/system.h"
+#include "asm/errno.h"
+#include "asm/uaccess.h"
+#include "user_util.h"
+#include "kern_util.h"
+#include "irq_user.h"
+#include "irq_kern.h"
+
+
+/*
+ * Generic, controller-independent functions:
+ */
+
+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_printf(p, "           ");
+                for_each_online_cpu(j)
+                        seq_printf(p, "CPU%d       ",j);
+                seq_putc(p, '\n');
+        }
+
+        if (i < NR_IRQS) {
+                spin_lock_irqsave(&irq_desc[i].lock, flags);
+                action = irq_desc[i].action;
+                if (!action) 
+                        goto skip;
+                seq_printf(p, "%3d: ",i);
+#ifndef CONFIG_SMP
+                seq_printf(p, "%10u ", kstat_irqs(i));
+#else
+                for_each_online_cpu(j)
+                        seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+#endif
+                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');
+skip:
+                spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+        } else if (i == NR_IRQS) {
+                seq_putc(p, '\n');
+        }
+
+        return 0;
+}
+
+/*
+ * do_IRQ handles all normal device IRQ's (the special
+ * SMP cross-CPU interrupts have their own specific
+ * handlers).
+ */
+unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
+{
+       irq_enter();
+       __do_IRQ(irq, (struct pt_regs *) regs);
+       irq_exit();
+       return 1;
+}
+
+int um_request_irq(unsigned int irq, int fd, int type,
+                   irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                   unsigned long irqflags, const char * devname,
+                   void *dev_id)
+{
+        int err;
+
+        err = request_irq(irq, handler, irqflags, devname, dev_id);
+        if(err)
+                return(err);
+
+        if(fd != -1)
+                err = activate_fd(irq, fd, type, dev_id);
+        return(err);
+}
+EXPORT_SYMBOL(um_request_irq);
+EXPORT_SYMBOL(reactivate_fd);
+
+static DEFINE_SPINLOCK(irq_spinlock);
+
+unsigned long irq_lock(void)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&irq_spinlock, flags);
+        return(flags);
+}
+
+void irq_unlock(unsigned long flags)
+{
+        spin_unlock_irqrestore(&irq_spinlock, flags);
+}
+
+/*  presently hw_interrupt_type must define (startup || enable) &&
+ *  disable && end */
+static void dummy(unsigned int irq)
+{
+}
+
+static struct hw_interrupt_type SIGIO_irq_type = {
+        .typename = "SIGIO",
+        .disable = dummy,
+        .enable = dummy,
+        .ack = dummy,
+        .end = dummy
+};
+
+static struct hw_interrupt_type SIGVTALRM_irq_type = {
+        .typename = "SIGVTALRM",
+        .shutdown = dummy, /* never called */
+        .disable = dummy,
+        .enable = dummy,
+        .ack = dummy,
+        .end = dummy
+};
+
+void __init init_IRQ(void)
+{
+        int i;
+
+        irq_desc[TIMER_IRQ].status = IRQ_DISABLED;
+        irq_desc[TIMER_IRQ].action = NULL;
+        irq_desc[TIMER_IRQ].depth = 1;
+        irq_desc[TIMER_IRQ].handler = &SIGVTALRM_irq_type;
+        enable_irq(TIMER_IRQ);
+        for(i=1;i<NR_IRQS;i++){
+                irq_desc[i].status = IRQ_DISABLED;
+                irq_desc[i].action = NULL;
+                irq_desc[i].depth = 1;
+                irq_desc[i].handler = &SIGIO_irq_type;
+                enable_irq(i);
+        }
+        init_irq_signals(0);
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */