fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / asm-mips / irq.h

diff --git a/include/asm-mips/irq.h b/include/asm-mips/irq.h
index d9667a8..386da82 100644 (file)
--- a/include/asm-mips/irq.h
+++ b/include/asm-mips/irq.h
@@ -9,8 +9,10 @@
 #ifndef _ASM_IRQ_H
 #define _ASM_IRQ_H
 
-#include <linux/config.h>
 #include <linux/linkage.h>
+
+#include <asm/mipsmtregs.h>
+
 #include <irq.h>
 
 #ifdef CONFIG_I8259
@@ -22,16 +24,52 @@ static inline int irq_canonicalize(int irq)
 #define irq_canonicalize(irq) (irq)    /* Sane hardware, sane code ... */
 #endif
 
-extern void disable_irq(unsigned int);
-extern void disable_irq_nosync(unsigned int);
-extern void enable_irq(unsigned int);
+#ifdef CONFIG_MIPS_MT_SMTC
+/*
+ * Clear interrupt mask handling "backstop" if irq_hwmask
+ * entry so indicates. This implies that the ack() or end()
+ * functions will take over re-enabling the low-level mask.
+ * Otherwise it will be done on return from exception.
+ */
+#define __DO_IRQ_SMTC_HOOK(irq)                                                \
+do {                                                                   \
+       if (irq_hwmask[irq] & 0x0000ff00)                               \
+               write_c0_tccontext(read_c0_tccontext() &                \
+                                  ~(irq_hwmask[irq] & 0x0000ff00));    \
+} while (0)
+#else
+#define __DO_IRQ_SMTC_HOOK(irq) do { } while (0)
+#endif
 
-struct pt_regs;
-extern asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs);
+/*
+ * do_IRQ handles all normal device IRQ's (the special
+ * SMP cross-CPU interrupts have their own specific
+ * handlers).
+ *
+ * Ideally there should be away to get this into kernel/irq/handle.c to
+ * avoid the overhead of a call for just a tiny function ...
+ */
+#define do_IRQ(irq)                                                    \
+do {                                                                   \
+       irq_enter();                                                    \
+       __DO_IRQ_SMTC_HOOK(irq);                                        \
+       generic_handle_irq(irq);                                        \
+       irq_exit();                                                     \
+} while (0)
 
-extern void init_generic_irq(void);
+extern void arch_init_irq(void);
+extern void spurious_interrupt(void);
 
+#ifdef CONFIG_MIPS_MT_SMTC
 struct irqaction;
-int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
+
+extern unsigned long irq_hwmask[];
+extern int setup_irq_smtc(unsigned int irq, struct irqaction * new,
+                          unsigned long hwmask);
+#endif /* CONFIG_MIPS_MT_SMTC */
+
+extern int allocate_irqno(void);
+extern void alloc_legacy_irqno(void);
+extern void free_irqno(unsigned int irq);
 
 #endif /* _ASM_IRQ_H */