This commit was manufactured by cvs2svn to create tag

[linux-2.6.git] / include / asm-i386 / hardirq.h

diff --git a/include/asm-i386/hardirq.h b/include/asm-i386/hardirq.h
index 95db6fd..8f5a075 100644 (file)
--- a/include/asm-i386/hardirq.h
+++ b/include/asm-i386/hardirq.h
@@ -14,6 +14,48 @@ typedef struct {
 
 #include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
 
-void ack_bad_irq(unsigned int irq);
+/*
+ * We put the hardirq and softirq counter into the preemption
+ * counter. The bitmask has the following meaning:
+ *
+ * - bits 0-7 are the preemption count (max preemption depth: 256)
+ * - bits 8-15 are the softirq count (max # of softirqs: 256)
+ * - bits 16-23 are the hardirq count (max # of hardirqs: 256)
+ *
+ * - ( bit 26 is the PREEMPT_ACTIVE flag. )
+ *
+ * PREEMPT_MASK: 0x000000ff
+ * SOFTIRQ_MASK: 0x0000ff00
+ * HARDIRQ_MASK: 0x00ff0000
+ */
+
+#define PREEMPT_BITS   8
+#define SOFTIRQ_BITS   8
+#define HARDIRQ_BITS   8
+
+#define PREEMPT_SHIFT  0
+#define SOFTIRQ_SHIFT  (PREEMPT_SHIFT + PREEMPT_BITS)
+#define HARDIRQ_SHIFT  (SOFTIRQ_SHIFT + SOFTIRQ_BITS)
+
+/*
+ * The hardirq mask has to be large enough to have
+ * space for potentially all IRQ sources in the system
+ * nesting on a single CPU:
+ */
+#if (1 << HARDIRQ_BITS) < NR_IRQS
+# error HARDIRQ_BITS is too low!
+#endif
+
+#define nmi_enter()            (irq_enter())
+#define nmi_exit()             (preempt_count() -= HARDIRQ_OFFSET)
+
+#define irq_enter()            (preempt_count() += HARDIRQ_OFFSET)
+#define irq_exit()                                                     \
+do {                                                                   \
+               preempt_count() -= IRQ_EXIT_OFFSET;                     \
+               if (!in_interrupt() && softirq_pending(smp_processor_id())) \
+                       do_softirq();                                   \
+               preempt_enable_no_resched();                            \
+} while (0)
 
 #endif /* __ASM_HARDIRQ_H */