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-rw-r--r--examples/performance-thread/common/arch/arm64/ctx.c90
-rw-r--r--examples/performance-thread/common/arch/arm64/ctx.h83
-rw-r--r--examples/performance-thread/common/arch/arm64/stack.h84
3 files changed, 257 insertions, 0 deletions
diff --git a/examples/performance-thread/common/arch/arm64/ctx.c b/examples/performance-thread/common/arch/arm64/ctx.c
new file mode 100644
index 00000000..d0eacaa6
--- /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"
+ );
+}
diff --git a/examples/performance-thread/common/arch/arm64/ctx.h b/examples/performance-thread/common/arch/arm64/ctx.h
new file mode 100644
index 00000000..38c86ce6
--- /dev/null
+++ b/examples/performance-thread/common/arch/arm64/ctx.h
@@ -0,0 +1,83 @@
+/*
+ * 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.
+ */
+
+#ifndef CTX_H
+#define CTX_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * CPU context registers
+ */
+struct ctx {
+ void *sp; /* 0 */
+ void *fp; /* 8 */
+ void *lr; /* 16 */
+
+ /* Callee Saved Generic Registers */
+ void *r19; /* 24 */
+ void *r20; /* 32 */
+ void *r21; /* 40 */
+ void *r22; /* 48 */
+ void *r23; /* 56 */
+ void *r24; /* 64 */
+ void *r25; /* 72 */
+ void *r26; /* 80 */
+ void *r27; /* 88 */
+ void *r28; /* 96 */
+
+ /*
+ * Callee Saved SIMD Registers. Only the bottom 64-bits
+ * of these registers needs to be saved.
+ */
+ void *v8; /* 104 */
+ void *v9; /* 112 */
+ void *v10; /* 120 */
+ void *v11; /* 128 */
+ void *v12; /* 136 */
+ void *v13; /* 144 */
+ void *v14; /* 152 */
+ void *v15; /* 160 */
+};
+
+
+void
+ctx_switch(struct ctx *new_ctx, struct ctx *curr_ctx);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* RTE_CTX_H_ */
diff --git a/examples/performance-thread/common/arch/arm64/stack.h b/examples/performance-thread/common/arch/arm64/stack.h
new file mode 100644
index 00000000..fa3b31e9
--- /dev/null
+++ b/examples/performance-thread/common/arch/arm64/stack.h
@@ -0,0 +1,84 @@
+/*
+ * 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.
+ */
+
+#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)
+{
+ void **stack_top = (void *)((char *)(lt->stack) + lt->stack_size);
+
+ /*
+ * Align stack_top to 16 bytes. Arm64 has the constraint that the
+ * stack pointer must always be quad-word aligned.
+ */
+ stack_top = (void **)(((unsigned long)(stack_top)) & ~0xfUL);
+
+ /*
+ * First Stack Frame
+ */
+ stack_top[0] = NULL;
+ stack_top[-1] = NULL;
+
+ /*
+ * Initialize the context
+ */
+ lt->ctx.fp = &stack_top[-1];
+ lt->ctx.sp = &stack_top[-2];
+
+ /*
+ * Here only the address of _lthread_exec is saved as the link
+ * register value. The argument to _lthread_exec i.e the address of
+ * the lthread struct is not saved. This is because the first
+ * argument to ctx_switch is the address of the new context,
+ * which also happens to be the address of required lthread struct.
+ * So while returning from ctx_switch into _thread_exec, parameter
+ * register x0 will always contain the required value.
+ */
+ lt->ctx.lr = func;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* STACK_H_ */