Remove make preinstall

A speciality of the RTEMS build system was the make preinstall step.  It
copied header files from arbitrary locations into the build tree.  The
header files were included via the -Bsome/build/tree/path GCC command
line option.

This has at least seven problems:

* The make preinstall step itself needs time and disk space.

* Errors in header files show up in the build tree copy.  This makes it
  hard for editors to open the right file to fix the error.

* There is no clear relationship between source and build tree header
  files.  This makes an audit of the build process difficult.

* The visibility of all header files in the build tree makes it
  difficult to enforce API barriers.  For example it is discouraged to
  use BSP-specifics in the cpukit.

* An introduction of a new build system is difficult.

* Include paths specified by the -B option are system headers.  This
  may suppress warnings.

* The parallel build had sporadic failures on some hosts.

This patch removes the make preinstall step.   All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc.  Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.

The new cpukit include directories are:

* cpukit/include

* cpukit/score/cpu/@RTEMS_CPU@/include

* cpukit/libnetworking

The new BSP include directories are:

* bsps/include

* bsps/@RTEMS_CPU@/include

* bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include

There are build tree include directories for generated files.

The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path
order.

The "bootstrap -p" option was removed.  The new "bootstrap -H" option
should be used to regenerate the "headers.am" files.

Update #3254.

1 files changed, 262 insertions, 0 deletions

diff --git a/cpukit/include/rtems/score/smplockmcs.h b/cpukit/include/rtems/score/smplockmcs.h
new file mode 100644
index 0000000000..5a1ad23dc9
--- /dev/null
+++ b/cpukit/include/rtems/score/smplockmcs.h
@@ -0,0 +1,262 @@
+/**
+ * @file
+ *
+ * @ingroup ScoreSMPLock
+ *
+ * @brief SMP Lock API
+ */
+
+/*
+ * Copyright (c) 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_SMPLOCKMCS_H
+#define _RTEMS_SCORE_SMPLOCKMCS_H
+
+#include <rtems/score/cpuopts.h>
+
+#if defined(RTEMS_SMP)
+
+#include <rtems/score/atomic.h>
+#include <rtems/score/smplockstats.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @addtogroup ScoreSMPLock
+ *
+ * @{
+ */
+
+/**
+ * @brief SMP Mellor-Crummey and Scott (MCS) lock context.
+ */
+typedef struct SMP_MCS_lock_Context {
+  /**
+   * @brief The next context on the queue if it exists.
+   */
+  union {
+    /**
+     * @brief The next context as an atomic unsigned integer pointer value.
+     */
+    Atomic_Uintptr atomic;
+
+    /**
+     * @brief The next context as a normal pointer.
+     *
+     * Only provided for debugging purposes.
+     */
+    struct SMP_MCS_lock_Context *normal;
+  } next;
+
+  /**
+   * @brief Indicates if the lock is owned or free in case a previous context
+   * exits on the queue.
+   *
+   * This field is initialized to a non-zero value.  The previous lock owner
+   * (which is the owner of the previous context) will set it to zero during
+   * its lock release.
+   */
+  Atomic_Uint locked;
+
+#if defined(RTEMS_PROFILING)
+  SMP_lock_Stats_context Stats_context;
+
+  unsigned int queue_length;
+#endif
+} SMP_MCS_lock_Context;
+
+/**
+ * @brief SMP Mellor-Crummey and Scott (MCS) lock control.
+ */
+typedef struct {
+  /**
+   * @brief The queue tail context.
+   *
+   * The lock is free, in case this field is zero, otherwise it is locked by
+   * the owner of the queue head.
+   */
+  union {
+    /**
+     * @brief The queue tail context as an atomic unsigned integer pointer
+     * value.
+     */
+    Atomic_Uintptr atomic;
+
+    /**
+     * @brief The queue tail context as a normal pointer.
+     *
+     * Only provided for debugging purposes.
+     */
+    struct SMP_MCS_lock_Context *normal;
+  } queue;
+} SMP_MCS_lock_Control;
+
+/**
+ * @brief SMP MCS lock control initializer for static initialization.
+ */
+#define SMP_MCS_LOCK_INITIALIZER { { ATOMIC_INITIALIZER_UINTPTR( 0 ) } }
+
+/**
+ * @brief Initializes an SMP MCS lock.
+ *
+ * Concurrent initialization leads to unpredictable results.
+ *
+ * @param lock The SMP MCS lock control.
+ */
+static inline void _SMP_MCS_lock_Initialize( SMP_MCS_lock_Control *lock )
+{
+  _Atomic_Init_uintptr( &lock->queue.atomic, 0 );
+}
+
+/**
+ * @brief Destroys an SMP MCS lock.
+ *
+ * Concurrent destruction leads to unpredictable results.
+ *
+ * @param lock The SMP MCS lock control.
+ */
+static inline void _SMP_MCS_lock_Destroy( SMP_MCS_lock_Control *lock )
+{
+  (void) lock;
+}
+
+static inline void _SMP_MCS_lock_Do_acquire(
+  SMP_MCS_lock_Control   *lock,
+  SMP_MCS_lock_Context   *context
+#if defined(RTEMS_PROFILING)
+  ,
+  SMP_lock_Stats         *stats
+#endif
+)
+{
+  SMP_MCS_lock_Context           *previous;
+#if defined(RTEMS_PROFILING)
+  SMP_lock_Stats_acquire_context  acquire_context;
+
+  _SMP_lock_Stats_acquire_begin( &acquire_context );
+  context->queue_length = 0;
+#endif
+
+  _Atomic_Store_uintptr( &context->next.atomic, 0, ATOMIC_ORDER_RELAXED );
+  _Atomic_Store_uint( &context->locked, 1, ATOMIC_ORDER_RELAXED );
+
+  previous = (SMP_MCS_lock_Context *) _Atomic_Exchange_uintptr(
+    &lock->queue.atomic,
+    (uintptr_t) context,
+    ATOMIC_ORDER_ACQ_REL
+  );
+
+  if ( previous != NULL ) {
+    unsigned int locked;
+
+    _Atomic_Store_uintptr(
+      &previous->next.atomic,
+      (uintptr_t) context,
+      ATOMIC_ORDER_RELAXED
+    );
+
+    do {
+      locked = _Atomic_Load_uint( &context->locked, ATOMIC_ORDER_ACQUIRE );
+    } while ( locked != 0 );
+  }
+
+#if defined(RTEMS_PROFILING)
+  _SMP_lock_Stats_acquire_end(
+    &acquire_context,
+    stats,
+    &context->Stats_context,
+    context->queue_length
+  );
+#endif
+}
+
+/**
+ * @brief Acquires an SMP MCS lock.
+ *
+ * This function will not disable interrupts.  The caller must ensure that the
+ * current thread of execution is not interrupted indefinite once it obtained
+ * the SMP MCS lock.
+ *
+ * @param lock The SMP MCS lock control.
+ * @param context The SMP MCS lock context.
+ * @param stats The SMP lock statistics.
+ */
+#if defined(RTEMS_PROFILING)
+  #define _SMP_MCS_lock_Acquire( lock, context, stats ) \
+    _SMP_MCS_lock_Do_acquire( lock, context, stats )
+#else
+  #define _SMP_MCS_lock_Acquire( lock, context, stats ) \
+    _SMP_MCS_lock_Do_acquire( lock, context )
+#endif
+
+/**
+ * @brief Releases an SMP MCS lock.
+ *
+ * @param lock The SMP MCS lock control.
+ * @param context The SMP MCS lock context.
+ */
+static inline void _SMP_MCS_lock_Release(
+  SMP_MCS_lock_Control *lock,
+  SMP_MCS_lock_Context *context
+)
+{
+  SMP_MCS_lock_Context *next;
+
+  next = (SMP_MCS_lock_Context *) _Atomic_Load_uintptr(
+    &context->next.atomic,
+    ATOMIC_ORDER_RELAXED
+  );
+
+  if ( next == NULL ) {
+    uintptr_t expected;
+    bool      success;
+
+    expected = (uintptr_t) context;
+    success = _Atomic_Compare_exchange_uintptr(
+      &lock->queue.atomic,
+      &expected,
+      0,
+      ATOMIC_ORDER_RELEASE,
+      ATOMIC_ORDER_RELAXED
+    );
+
+    if ( success ) {
+#if defined(RTEMS_PROFILING)
+      _SMP_lock_Stats_release_update( &context->Stats_context );
+#endif
+      /* Nobody waits. So, we are done */
+      return;
+    }
+
+    do {
+      next = (SMP_MCS_lock_Context *) _Atomic_Load_uintptr(
+        &context->next.atomic,
+        ATOMIC_ORDER_RELAXED
+      );
+    } while ( next == NULL );
+  }
+
+#if defined(RTEMS_PROFILING)
+  next->queue_length = context->queue_length + 1;
+  _SMP_lock_Stats_release_update( &context->Stats_context );
+#endif
+
+  _Atomic_Store_uint( &next->locked, 0, ATOMIC_ORDER_RELEASE );
+}
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* RTEMS_SMP */
+
+#endif /* _RTEMS_SCORE_SMPLOCKMCS_H */