1 files changed, 29 insertions, 0 deletions

diff --git a/include/asm-alpha/hardirq.h b/include/asm-alpha/hardirq.h
new file mode 100644
index 000000000000..c0593f9b21e1
--- /dev/null
+++ b/include/asm-alpha/hardirq.h
@@ -0,0 +1,29 @@
+#ifndef _ALPHA_HARDIRQ_H
+#define _ALPHA_HARDIRQ_H
+
+#include <linux/config.h>
+#include <linux/threads.h>
+#include <linux/cache.h>
+
+
+/* entry.S is sensitive to the offsets of these fields */
+typedef struct {
+        unsigned long __softirq_pending;
+} ____cacheline_aligned irq_cpustat_t;
+
+#include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
+
+#define HARDIRQ_BITS    12
+
+/*
+ * The hardirq mask has to be large enough to have
+ * space for potentially nestable IRQ sources in the system
+ * to nest on a single CPU. On Alpha, interrupts are masked at the CPU
+ * by IPL as well as at the system level. We only have 8 IPLs (UNIX PALcode)
+ * so we really only have 8 nestable IRQs, but allow some overhead
+ */
+#if (1 << HARDIRQ_BITS) < 16
+#error HARDIRQ_BITS is too low!
+#endif
+
+#endif /* _ALPHA_HARDIRQ_H */