xtensa: convert to asm-generic/hardirq.h
[linux-2.6.git] / arch / xtensa / kernel / irq.c
index 51f9bed..c64a5d3 100644 (file)
@@ -4,7 +4,7 @@
  * Xtensa built-in interrupt controller and some generic functions copied
  * from i386.
  *
- * Copyright (C) 2002 - 2005 Tensilica, Inc.
+ * Copyright (C) 2002 - 2006 Tensilica, Inc.
  * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
  *
  *
 #include <asm/uaccess.h>
 #include <asm/platform.h>
 
-static void enable_xtensa_irq(unsigned int irq);
-static void disable_xtensa_irq(unsigned int irq);
-static void mask_and_ack_xtensa(unsigned int irq);
-static void end_xtensa_irq(unsigned int irq);
-
 static unsigned int cached_irq_mask;
 
 atomic_t irq_err_count;
 
 /*
- * 'what should we do if we get a hw irq event on an illegal vector'.
- * each architecture has to answer this themselves.
- */
-void ack_bad_irq(unsigned int irq)
-{
-          printk("unexpected IRQ trap at vector %02x\n", irq);
-}
-
-/*
  * 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, struct pt_regs *regs)
+asmlinkage void do_IRQ(int irq, struct pt_regs *regs)
 {
+       struct pt_regs *old_regs = set_irq_regs(regs);
+       struct irq_desc *desc = irq_desc + irq;
+
+       if (irq >= NR_IRQS) {
+               printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
+                               __func__, irq);
+       }
+
        irq_enter();
 
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
@@ -63,12 +57,10 @@ unsigned int  do_IRQ(int irq, struct pt_regs *regs)
                               sp - sizeof(struct thread_info));
        }
 #endif
-
-       __do_IRQ(irq, regs);
+       desc->handle_irq(irq, desc);
 
        irq_exit();
-
-       return 1;
+       set_irq_regs(old_regs);
 }
 
 /*
@@ -89,7 +81,7 @@ int show_interrupts(struct seq_file *p, void *v)
        }
 
        if (i < NR_IRQS) {
-               spin_lock_irqsave(&irq_desc[i].lock, flags);
+               raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
                action = irq_desc[i].action;
                if (!action)
                        goto skip;
@@ -98,9 +90,9 @@ int show_interrupts(struct seq_file *p, void *v)
                seq_printf(p, "%10u ", kstat_irqs(i));
 #else
                for_each_online_cpu(j)
-                       seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+                       seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
 #endif
-               seq_printf(p, " %14s", irq_desc[i].handler->typename);
+               seq_printf(p, " %14s", irq_desc[i].chip->typename);
                seq_printf(p, "  %s", action->name);
 
                for (action=action->next; action; action = action->next)
@@ -108,7 +100,7 @@ int show_interrupts(struct seq_file *p, void *v)
 
                seq_putc(p, '\n');
 skip:
-               spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+               raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
        } else if (i == NR_IRQS) {
                seq_printf(p, "NMI: ");
                for_each_online_cpu(j)
@@ -118,72 +110,84 @@ skip:
        }
        return 0;
 }
-/* shutdown is same as "disable" */
-#define shutdown_xtensa_irq disable_xtensa_irq
 
-static unsigned int startup_xtensa_irq(unsigned int irq)
-{
-       enable_xtensa_irq(irq);
-       return 0;               /* never anything pending */
-}
-
-static struct hw_interrupt_type xtensa_irq_type = {
-       "Xtensa-IRQ",
-       startup_xtensa_irq,
-       shutdown_xtensa_irq,
-       enable_xtensa_irq,
-       disable_xtensa_irq,
-       mask_and_ack_xtensa,
-       end_xtensa_irq
-};
-
-static inline void mask_irq(unsigned int irq)
+static void xtensa_irq_mask(unsigned int irq)
 {
        cached_irq_mask &= ~(1 << irq);
        set_sr (cached_irq_mask, INTENABLE);
 }
 
-static inline void unmask_irq(unsigned int irq)
+static void xtensa_irq_unmask(unsigned int irq)
 {
        cached_irq_mask |= 1 << irq;
        set_sr (cached_irq_mask, INTENABLE);
 }
 
-static void disable_xtensa_irq(unsigned int irq)
+static void xtensa_irq_enable(unsigned int irq)
 {
-       unsigned long flags;
-       local_save_flags(flags);
-       mask_irq(irq);
-       local_irq_restore(flags);
+       variant_irq_enable(irq);
+       xtensa_irq_unmask(irq);
 }
 
-static void enable_xtensa_irq(unsigned int irq)
+static void xtensa_irq_disable(unsigned int irq)
 {
-       unsigned long flags;
-       local_save_flags(flags);
-       unmask_irq(irq);
-       local_irq_restore(flags);
+       xtensa_irq_mask(irq);
+       variant_irq_disable(irq);
 }
 
-static void mask_and_ack_xtensa(unsigned int irq)
+static void xtensa_irq_ack(unsigned int irq)
 {
-        disable_xtensa_irq(irq);
+       set_sr(1 << irq, INTCLEAR);
 }
 
-static void end_xtensa_irq(unsigned int irq)
+static int xtensa_irq_retrigger(unsigned int irq)
 {
-        enable_xtensa_irq(irq);
+       set_sr (1 << irq, INTSET);
+       return 1;
 }
 
 
+static struct irq_chip xtensa_irq_chip = {
+       .name           = "xtensa",
+       .enable         = xtensa_irq_enable,
+       .disable        = xtensa_irq_disable,
+       .mask           = xtensa_irq_mask,
+       .unmask         = xtensa_irq_unmask,
+       .ack            = xtensa_irq_ack,
+       .retrigger      = xtensa_irq_retrigger,
+};
+
 void __init init_IRQ(void)
 {
-       int i;
+       int index;
 
-       for (i=0; i < XTENSA_NR_IRQS; i++)
-               irq_desc[i].handler = &xtensa_irq_type;
+       for (index = 0; index < XTENSA_NR_IRQS; index++) {
+               int mask = 1 << index;
+
+               if (mask & XCHAL_INTTYPE_MASK_SOFTWARE)
+                       set_irq_chip_and_handler(index, &xtensa_irq_chip,
+                                                handle_simple_irq);
+
+               else if (mask & XCHAL_INTTYPE_MASK_EXTERN_EDGE)
+                       set_irq_chip_and_handler(index, &xtensa_irq_chip,
+                                                handle_edge_irq);
+
+               else if (mask & XCHAL_INTTYPE_MASK_EXTERN_LEVEL)
+                       set_irq_chip_and_handler(index, &xtensa_irq_chip,
+                                                handle_level_irq);
+
+               else if (mask & XCHAL_INTTYPE_MASK_TIMER)
+                       set_irq_chip_and_handler(index, &xtensa_irq_chip,
+                                                handle_edge_irq);
+
+               else    /* XCHAL_INTTYPE_MASK_WRITE_ERROR */
+                       /* XCHAL_INTTYPE_MASK_NMI */
+
+                       set_irq_chip_and_handler(index, &xtensa_irq_chip,
+                                                handle_level_irq);
+       }
 
        cached_irq_mask = 0;
 
-       platform_init_irq();
+       variant_init_irq();
 }