This commit was manufactured by cvs2svn to create tag

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

diff --git a/include/asm-alpha/hardirq.h b/include/asm-alpha/hardirq.h
index de7e476..10be402 100644 (file)
--- a/include/asm-alpha/hardirq.h
+++ b/include/asm-alpha/hardirq.h
@@ -16,8 +16,29 @@ typedef struct {
 
 #include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
 
+/*
+ * 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 16-27 are the hardirq count (max # of hardirqs: 4096)
+ *
+ * - ( bit 30 is the PREEMPT_ACTIVE flag. )
+ *
+ * PREEMPT_MASK: 0x000000ff
+ * SOFTIRQ_MASK: 0x0000ff00
+ * HARDIRQ_MASK: 0x0fff0000
+ */
+
+#define PREEMPT_BITS   8
+#define SOFTIRQ_BITS   8
 #define HARDIRQ_BITS   12
 
+#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 nestable IRQ sources in the system