arch/tricore: add spinlock support

add atomic test and set operation

Signed-off-by: chao an <anchao@lixiang.com>

arch/tricore/Kconfig

@@ -18,6 +18,7 @@ endchoice # Tricore Toolchain Selection
 
 config ARCH_TC3XX
 	bool
+	select ARCH_HAVE_TESTSET
 	default n
 
 config ARCH_FAMILY

arch/tricore/include/spinlock.h

@@ -0,0 +1,88 @@
+/****************************************************************************
+ * arch/tricore/include/spinlock.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_TRICORE_INCLUDE_SPINLOCK_H
+#define __ARCH_TRICORE_INCLUDE_SPINLOCK_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+#  include <stdint.h>
+#endif /* __ASSEMBLY__ */
+
+/****************************************************************************
+ * Pre-processor Prototypes
+ ****************************************************************************/
+
+/* Spinlock states */
+
+#define SP_UNLOCKED 0  /* The Un-locked state */
+#define SP_LOCKED   1  /* The Locked state */
+
+/* Memory barriers for use with NuttX spinlock logic
+ *
+ * Data Memory Barrier (DMB) acts as a memory barrier.
+ * Data Synchronization Barrier (DSB) acts as a special kind of memory
+ * barrier.
+ */
+
+#define SP_DSB() __dsync()
+#define SP_DMB() __asm("":::"memory")
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/* The Type of a spinlock. */
+
+typedef long spinlock_t;
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_testset
+ *
+ * Description:
+ *   Perform an atomic test and set operation on the provided spinlock.
+ *
+ *   This function must be provided via the architecture-specific logic.
+ *
+ * Input Parameters:
+ *   lock - The address of spinlock object.
+ *
+ * Returned Value:
+ *   The spinlock is always locked upon return.  The value of previous value
+ *   of the spinlock variable is returned, either SP_LOCKED if the spinlock
+ *   as previously locked (meaning that the test-and-set operation failed to
+ *   obtain the lock) or SP_UNLOCKED if the spinlock was previously unlocked
+ *   (meaning that we successfully obtained the lock)
+ *
+ ****************************************************************************/
+
+/* See prototype in nuttx/include/nuttx/spinlock.h */
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_TRICORE_INCLUDE_SPINLOCK_H */

arch/tricore/src/common/Make.defs

@@ -46,5 +46,9 @@ CMN_CSRCS += tricore_trapcall.c
 CMN_CSRCS += tricore_systimer.c
 CMN_CSRCS += tricore_usestack.c
 
+ifeq ($(CONFIG_SPINLOCK),y)
+  CMN_CSRCS += tricore_testset.c
+endif
+
 CFLAGS += -DIFX_CFG_EXTEND_TRAP_HOOKS
 CFLAGS += -DIFX_USE_SW_MANAGED_INT

arch/tricore/src/common/tricore_testset.c

@@ -0,0 +1,61 @@
+/****************************************************************************
+ * arch/tricore/src/common/tricore_testset.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/spinlock.h>
+
+#include "tricore_internal.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_testset
+ *
+ * Description:
+ *   Perform an atomic test and set operation on the provided spinlock.
+ *   This function must be provided via the architecture-specific logic.
+ *
+ * Input Parameters:
+ *   lock  - A reference to the spinlock object.
+ *
+ * Returned Value:
+ *   The spinlock is always locked upon return.  The previous value of the
+ *   spinlock variable is returned, either SP_LOCKED if the spinlock was
+ *   previously locked (meaning that the test-and-set operation failed to
+ *   obtain the lock) or SP_UNLOCKED if the spinlock was previously unlocked
+ *   (meaning that we successfully obtained the lock).
+ *
+ ****************************************************************************/
+
+spinlock_t up_testset(volatile spinlock_t *lock)
+{
+  /* Perform the compare and set operation */
+
+  return __cmpswapw((volatile void *)lock, SP_LOCKED, SP_UNLOCKED);
+}
+

boards/tricore/tc3xx/tc397/configs/nsh/defconfig

@@ -40,6 +40,7 @@ CONFIG_READLINE_CMD_HISTORY=y
 CONFIG_SCHED_HPWORK=y
 CONFIG_SCHED_HPWORKPRIORITY=192
 CONFIG_SCHED_WAITPID=y
+CONFIG_SPINLOCK=y
 CONFIG_STACK_COLORATION=y
 CONFIG_START_MONTH=3
 CONFIG_START_YEAR=2016