Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[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..dde677f 100644 (file)
--- a/include/asm-mips/irq.h
+++ b/include/asm-mips/irq.h
@@ -11,6 +11,9 @@
 
 #include <linux/config.h>
 #include <linux/linkage.h>
+
+#include <asm/mipsmtregs.h>
+
 #include <irq.h>
 
 #ifdef CONFIG_I8259
@@ -22,16 +25,56 @@ 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);
-
 struct pt_regs;
-extern asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs);
 
-extern void init_generic_irq(void);
+extern asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs);
+
+#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()                                           \
+do {                                                                   \
+       if (irq_hwmask[irq] & 0x0000ff00)                               \
+               write_c0_tccontext(read_c0_tccontext() &                \
+                                  ~(irq_hwmask[irq] & 0x0000ff00));    \
+} while (0)
+#else
+#define __DO_IRQ_SMTC_HOOK() do { } while (0)
+#endif
+
+#ifdef CONFIG_PREEMPT
 
+/*
+ * 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, regs)                                              \
+do {                                                                   \
+       irq_enter();                                                    \
+       __DO_IRQ_SMTC_HOOK();                                           \
+       __do_IRQ((irq), (regs));                                        \
+       irq_exit();                                                     \
+} while (0)
+
+#endif
+
+extern void arch_init_irq(void);
+extern void spurious_interrupt(struct pt_regs *regs);
+
+#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 */
 
 #endif /* _ASM_IRQ_H */