mirror of https://github.com/F-Stack/f-stack.git
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Cavium, Inc
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*/
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#include <rte_common.h>
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#include <ctx.h>
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void
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ctx_switch(struct ctx *new_ctx __rte_unused, struct ctx *curr_ctx __rte_unused)
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{
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/* SAVE CURRENT CONTEXT */
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asm volatile (
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/* Save SP */
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"mov x3, sp\n"
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"str x3, [x1, #0]\n"
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/* Save FP and LR */
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"stp x29, x30, [x1, #8]\n"
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/* Save Callee Saved Regs x19 - x28 */
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"stp x19, x20, [x1, #24]\n"
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"stp x21, x22, [x1, #40]\n"
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"stp x23, x24, [x1, #56]\n"
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"stp x25, x26, [x1, #72]\n"
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"stp x27, x28, [x1, #88]\n"
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/*
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* Save bottom 64-bits of Callee Saved
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* SIMD Regs v8 - v15
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*/
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"stp d8, d9, [x1, #104]\n"
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"stp d10, d11, [x1, #120]\n"
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"stp d12, d13, [x1, #136]\n"
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"stp d14, d15, [x1, #152]\n"
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);
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/* RESTORE NEW CONTEXT */
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asm volatile (
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/* Restore SP */
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"ldr x3, [x0, #0]\n"
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"mov sp, x3\n"
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/* Restore FP and LR */
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"ldp x29, x30, [x0, #8]\n"
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/* Restore Callee Saved Regs x19 - x28 */
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"ldp x19, x20, [x0, #24]\n"
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"ldp x21, x22, [x0, #40]\n"
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"ldp x23, x24, [x0, #56]\n"
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"ldp x25, x26, [x0, #72]\n"
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"ldp x27, x28, [x0, #88]\n"
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/*
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* Restore bottom 64-bits of Callee Saved
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* SIMD Regs v8 - v15
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*/
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"ldp d8, d9, [x0, #104]\n"
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"ldp d10, d11, [x0, #120]\n"
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"ldp d12, d13, [x0, #136]\n"
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"ldp d14, d15, [x0, #152]\n"
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);
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}
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