[dpdk-dev] [PATCH v2 1/2] examples/performance-thread: reorganise arch dependent code

[Ashwin Sekhar T K]

Moved the architecture dependent stack set code to architecture
specific directory.

Signed-off-by: Ashwin Sekhar T K <ashwin.sekhar at caviumnetworks.com>
---
 .../performance-thread/common/arch/x86/stack.h     | 66 ++++++++++++++++++++++
 examples/performance-thread/common/common.mk       |  8 ++-
 examples/performance-thread/common/lthread.c       | 11 +---
 3 files changed, 74 insertions(+), 11 deletions(-)
 create mode 100644 examples/performance-thread/common/arch/x86/stack.h

diff --git a/examples/performance-thread/common/arch/x86/stack.h b/examples/performance-thread/common/arch/x86/stack.h
new file mode 100644
index 000000000..80c06bf1c
--- /dev/null
+++ b/examples/performance-thread/common/arch/x86/stack.h
@@ -0,0 +1,66 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   Copyright(c) Cavium networks Ltd. 2017.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#ifndef STACK_H
+#define STACK_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lthread_int.h"
+
+/*
+ * Sets up the initial stack for the lthread.
+ */
+static inline void
+arch_set_stack(struct lthread *lt, void *func)
+{
+	char *stack_top = (char *)(lt->stack) + lt->stack_size;
+	void **s = (void **)stack_top;
+
+	/* set initial context */
+	s[-3] = NULL;
+	s[-2] = (void *)lt;
+	lt->ctx.rsp = (void *)(stack_top - (4 * sizeof(void *)));
+	lt->ctx.rbp = (void *)(stack_top - (3 * sizeof(void *)));
+	lt->ctx.rip = func;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* STACK_H_ */
diff --git a/examples/performance-thread/common/common.mk b/examples/performance-thread/common/common.mk
index f6cab7718..532dbf61d 100644
--- a/examples/performance-thread/common/common.mk
+++ b/examples/performance-thread/common/common.mk
@@ -37,8 +37,12 @@
 
 MKFILE_PATH=$(abspath $(dir $(lastword $(MAKEFILE_LIST))))
 
-VPATH := $(MKFILE_PATH) $(MKFILE_PATH)/arch/x86
+ifeq ($(CONFIG_RTE_ARCH_X86_64),y)
+ARCH_PATH += $(MKFILE_PATH)/arch/x86
+endif
+
+VPATH := $(MKFILE_PATH) $(ARCH_PATH)
 
 SRCS-y += lthread.c lthread_sched.c lthread_cond.c lthread_tls.c lthread_mutex.c lthread_diag.c ctx.c
 
-INCLUDES += -I$(MKFILE_PATH) -I$(MKFILE_PATH)/arch/x86/
+INCLUDES += -I$(MKFILE_PATH) -I$(ARCH_PATH)
diff --git a/examples/performance-thread/common/lthread.c b/examples/performance-thread/common/lthread.c
index 062275a43..7d76c8c46 100644
--- a/examples/performance-thread/common/lthread.c
+++ b/examples/performance-thread/common/lthread.c
@@ -76,6 +76,7 @@
 
 #include <rte_log.h>
 #include <ctx.h>
+#include <stack.h>
 
 #include "lthread_api.h"
 #include "lthread.h"
@@ -190,19 +191,11 @@ _lthread_init(struct lthread *lt,
  */
 void _lthread_set_stack(struct lthread *lt, void *stack, size_t stack_size)
 {
-	char *stack_top = (char *)stack + stack_size;
-	void **s = (void **)stack_top;
-
 	/* set stack */
 	lt->stack = stack;
 	lt->stack_size = stack_size;
 
-	/* set initial context */
-	s[-3] = NULL;
-	s[-2] = (void *)lt;
-	lt->ctx.rsp = (void *)(stack_top - (4 * sizeof(void *)));
-	lt->ctx.rbp = (void *)(stack_top - (3 * sizeof(void *)));
-	lt->ctx.rip = (void *)_lthread_exec;
+	arch_set_stack(lt, _lthread_exec);
 }
 
 /*
-- 
2.12.2