1 files changed, 82 insertions, 0 deletions
diff --git a/cpukit/score/cpu/no_cpu/include/rtems/score/cpuimpl.h b/cpukit/score/cpu/no_cpu/include/rtems/score/cpuimpl.h
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index 0000000000..85214d7f6c
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+++ b/cpukit/score/cpu/no_cpu/include/rtems/score/cpuimpl.h
@@ -0,0 +1,82 @@
+/**
+ * @file
+ *
+ * @brief CPU Port Implementation API
+ */
+
+/*
+ * Copyright (c) 2013, 2016 embedded brains GmbH
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_SCORE_CPUIMPL_H
+#define _RTEMS_SCORE_CPUIMPL_H
+
+#include <rtems/score/cpu.h>
+
+/**
+ * @brief The size of the CPU specific per-CPU control.
+ *
+ * This define must be visible to assember files since it is used to derive
+ * structure offsets.
+ */
+#define CPU_PER_CPU_CONTROL_SIZE 0
+
+#ifndef ASM
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief The CPU specific per-CPU control.
+ *
+ * The CPU port can place here all state information that must be available and
+ * maintained for each processor in the system.  This structure must contain at
+ * least one field for C/C++ compatibility.  In GNU C empty structures have a
+ * size of zero.  In C++ structures have a non-zero size.  In case
+ * CPU_PER_CPU_CONTROL_SIZE is defined to zero, then this structure is not
+ * used.
+ */
+typedef struct {
+  /* CPU specific per-CPU state */
+} CPU_Per_CPU_control;
+
+/**
+ * @brief Special register pointing to the per-CPU control of the current
+ * processor.
+ *
+ * This is optional.  Not every CPU port needs this.  It is only an optional
+ * optimization variant.
+ */
+register struct Per_CPU_Control *_CPU_Per_CPU_current asm( "rX" );
+
+/**
+ * @brief Optional method to obtain the per-CPU control of the current processor.
+ *
+ * This is optional.  Not every CPU port needs this.  It is only an optional
+ * optimization variant.  In case this macro is undefined, the default
+ * implementation using the current processor index will be used.
+ */
+#define _CPU_Get_current_per_CPU_control() ( _CPU_Per_CPU_current )
+
+/**
+ * @brief Optional method to get the executing thread.
+ *
+ * This is optional.  Not every CPU port needs this.  It is only an optional
+ * optimization variant.  In case this macro is undefined, the default
+ * implementation uses the per-CPU information and the current processor index
+ * to get the executing thread.
+ */
+#define _CPU_Get_thread_executing() ( _CPU_Per_CPU_current->executing )
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ASM */
+
+#endif /* _RTEMS_SCORE_CPUIMPL_H */