kernel: add header files

include/kernel/percpu.h

@@ -0,0 +1,36 @@
+#ifndef KERNEL_PERCPU_H_
+#define KERNEL_PERCPU_H_
+
+#include <mango/status.h>
+#include <kernel/compiler.h>
+#include <kernel/sched.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define DEFINE_PERCPU_VAR(type, name) \
+	__section(".data.percpu") type name
+
+#define percpu_get(var) \
+	__extension__({ \
+	preempt_disable(); \
+	__percpu_get(this_cpu(), var); \
+	})
+
+#define percpu_get_from(cpu, var) \
+	__extension__({ \
+	preempt_disable(); \
+	__percpu_get(cpu, var); \
+	})
+
+#define percpu_put(var) preempt_enable();
+
+extern kern_status_t init_per_cpu_areas(void);
+extern void *__percpu_get(unsigned int cpu, void *var);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif