1 files changed, 72 insertions, 0 deletions

diff --git a/include/asm-ia64/percpu.h b/include/asm-ia64/percpu.h
new file mode 100644
index 000000000000..1e87f19dad56
--- /dev/null
+++ b/include/asm-ia64/percpu.h
@@ -0,0 +1,72 @@
+#ifndef _ASM_IA64_PERCPU_H
+#define _ASM_IA64_PERCPU_H
+
+/*
+ * Copyright (C) 2002-2003 Hewlett-Packard Co
+ *      David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
+
+#ifdef __ASSEMBLY__
+# define THIS_CPU(var)  (per_cpu__##var)  /* use this to mark accesses to per-CPU variables... */
+#else /* !__ASSEMBLY__ */
+
+#include <linux/config.h>
+
+#include <linux/threads.h>
+
+#ifdef HAVE_MODEL_SMALL_ATTRIBUTE
+# define __SMALL_ADDR_AREA      __attribute__((__model__ (__small__)))
+#else
+# define __SMALL_ADDR_AREA
+#endif
+
+#define DECLARE_PER_CPU(type, name)                             \
+        extern __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name
+
+/* Separate out the type, so (int[3], foo) works. */
+#define DEFINE_PER_CPU(type, name)                              \
+        __attribute__((__section__(".data.percpu")))            \
+        __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name
+
+/*
+ * Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an
+ * external routine, to avoid include-hell.
+ */
+#ifdef CONFIG_SMP
+
+extern unsigned long __per_cpu_offset[NR_CPUS];
+
+/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
+DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);
+
+#define per_cpu(var, cpu)  (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]))
+#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset)))
+
+extern void percpu_modcopy(void *pcpudst, const void *src, unsigned long size);
+extern void setup_per_cpu_areas (void);
+extern void *per_cpu_init(void);
+
+#else /* ! SMP */
+
+#define per_cpu(var, cpu)                       (*((void)cpu, &per_cpu__##var))
+#define __get_cpu_var(var)                      per_cpu__##var
+#define per_cpu_init()                          (__phys_per_cpu_start)
+
+#endif  /* SMP */
+
+#define EXPORT_PER_CPU_SYMBOL(var)              EXPORT_SYMBOL(per_cpu__##var)
+#define EXPORT_PER_CPU_SYMBOL_GPL(var)          EXPORT_SYMBOL_GPL(per_cpu__##var)
+
+/*
+ * Be extremely careful when taking the address of this variable!  Due to virtual
+ * remapping, it is different from the canonical address returned by __get_cpu_var(var)!
+ * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
+ * more efficient.
+ */
+#define __ia64_per_cpu_var(var) (per_cpu__##var)
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_IA64_PERCPU_H */