New upstream version 17.08

[deb_dpdk.git] / examples / performance-thread / common / arch / arm64 / ctx.c

diff --git a/examples/performance-thread/common/arch/arm64/ctx.c b/examples/performance-thread/common/arch/arm64/ctx.c
new file mode 100644 (file)
index 0000000..d0eacaa
--- /dev/null
+++ b/examples/performance-thread/common/arch/arm64/ctx.c
@@ -0,0 +1,90 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright (C) Cavium, Inc. 2017.
+ *
+ *   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 Cavium, Inc 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.
+ */
+
+#include <rte_common.h>
+#include <ctx.h>
+
+void
+ctx_switch(struct ctx *new_ctx __rte_unused, struct ctx *curr_ctx __rte_unused)
+{
+       /* SAVE CURRENT CONTEXT */
+       asm volatile (
+               /* Save SP */
+               "mov x3, sp\n"
+               "str x3, [x1, #0]\n"
+
+               /* Save FP and LR */
+               "stp x29, x30, [x1, #8]\n"
+
+               /* Save Callee Saved Regs x19 - x28 */
+               "stp x19, x20, [x1, #24]\n"
+               "stp x21, x22, [x1, #40]\n"
+               "stp x23, x24, [x1, #56]\n"
+               "stp x25, x26, [x1, #72]\n"
+               "stp x27, x28, [x1, #88]\n"
+
+               /*
+                * Save bottom 64-bits of Callee Saved
+                * SIMD Regs v8 - v15
+                */
+               "stp d8, d9, [x1, #104]\n"
+               "stp d10, d11, [x1, #120]\n"
+               "stp d12, d13, [x1, #136]\n"
+               "stp d14, d15, [x1, #152]\n"
+       );
+
+       /* RESTORE NEW CONTEXT */
+       asm volatile (
+               /* Restore SP */
+               "ldr x3, [x0, #0]\n"
+               "mov sp, x3\n"
+
+               /* Restore FP and LR */
+               "ldp x29, x30, [x0, #8]\n"
+
+               /* Restore Callee Saved Regs x19 - x28 */
+               "ldp x19, x20, [x0, #24]\n"
+               "ldp x21, x22, [x0, #40]\n"
+               "ldp x23, x24, [x0, #56]\n"
+               "ldp x25, x26, [x0, #72]\n"
+               "ldp x27, x28, [x0, #88]\n"
+
+               /*
+                * Restore bottom 64-bits of Callee Saved
+                * SIMD Regs v8 - v15
+                */
+               "ldp d8, d9, [x0, #104]\n"
+               "ldp d10, d11, [x0, #120]\n"
+               "ldp d12, d13, [x0, #136]\n"
+               "ldp d14, d15, [x0, #152]\n"
+       );
+}