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/*
* 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"
);
}
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