1 files changed, 115 insertions, 0 deletions
diff --git a/arch/xtensa/include/xtensa_api.h b/arch/xtensa/include/xtensa_api.h
new file mode 100644
index 000000000..6cfb6cabf
--- /dev/null
+++ b/arch/xtensa/include/xtensa_api.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2016 Cadence Design Systems, Inc.
+ *
+ * Licensed 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.
+ */
+
+/******************************************************************************
+  Xtensa-specific API for RTOS ports.
+******************************************************************************/
+
+#ifndef __XTENSA_API_H__
+#define __XTENSA_API_H__
+
+#include <xtensa/hal.h>
+#include "xtensa_rtos.h"
+#include "xtensa_context.h"
+
+
+/* Typedef for C-callable interrupt handler function */
+typedef void (*xt_handler)(void *);
+
+/* Typedef for C-callable exception handler function */
+typedef void (*xt_exc_handler)(XtExcFrame *);
+
+
+/*
+-------------------------------------------------------------------------------
+  Call this function to set a handler for the specified exception.
+
+    n        - Exception number (type)
+    f        - Handler function address, NULL to uninstall handler.
+
+  The handler will be passed a pointer to the exception frame, which is created
+  on the stack of the thread that caused the exception.
+
+  If the handler returns, the thread context will be restored and the faulting
+  instruction will be retried. Any values in the exception frame that are
+  modified by the handler will be restored as part of the context. For details
+  of the exception frame structure see xtensa_context.h.
+-------------------------------------------------------------------------------
+*/
+extern xt_exc_handler _xt_set_exception_handler(int n, xt_exc_handler f);
+
+
+/*
+-------------------------------------------------------------------------------
+  Call this function to set a handler for the specified interrupt.
+ 
+    n        - Interrupt number.
+    f        - Handler function address, NULL to uninstall handler.
+    arg      - Argument to be passed to handler.
+-------------------------------------------------------------------------------
+*/
+#if XT_RTOS_IS_ZEPHYR_OS
+#define _xt_set_interrupt_handler _irq_handler_set /* Map it to Zephyr's one */
+#else
+extern xt_handler _xt_set_interrupt_handler(int n, xt_handler f, void * arg);
+#endif
+
+
+/*
+-------------------------------------------------------------------------------
+  Call this function to enable the specified interrupts.
+
+    mask     - Bit mask of interrupts to be enabled.
+-------------------------------------------------------------------------------
+*/
+extern void _xt_ints_on(unsigned int mask);
+
+
+/*
+-------------------------------------------------------------------------------
+  Call this function to disable the specified interrupts.
+
+    mask     - Bit mask of interrupts to be disabled.
+-------------------------------------------------------------------------------
+*/
+extern void _xt_ints_off(unsigned int mask);
+
+
+/*
+-------------------------------------------------------------------------------
+  Call this function to set the specified (s/w) interrupt.
+-------------------------------------------------------------------------------
+*/
+static inline void _xt_set_intset(unsigned int arg)
+{
+    xthal_set_intset(arg);
+}
+
+
+/*
+-------------------------------------------------------------------------------
+  Call this function to clear the specified (s/w or edge-triggered)
+  interrupt.
+-------------------------------------------------------------------------------
+*/
+static inline void _xt_set_intclear(unsigned int arg)
+{
+    xthal_set_intclear(arg);
+}
+
+
+#endif /* __XTENSA_API_H__ */
+