From e02cda008591317b1625707ff8e115a4841aa889 Mon Sep 17 00:00:00 2001
From: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 11:40:56 +0000
Subject: Introduce Virtio-loopback epsilon release:
Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.
Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9
---
disas/libvixl/vixl/a64/cpu-a64.h | 83 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100644 disas/libvixl/vixl/a64/cpu-a64.h
(limited to 'disas/libvixl/vixl/a64/cpu-a64.h')
diff --git a/disas/libvixl/vixl/a64/cpu-a64.h b/disas/libvixl/vixl/a64/cpu-a64.h
new file mode 100644
index 000000000..cdf09a6af
--- /dev/null
+++ b/disas/libvixl/vixl/a64/cpu-a64.h
@@ -0,0 +1,83 @@
+// Copyright 2014, ARM Limited
+// 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 ARM Limited 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 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 VIXL_CPU_A64_H
+#define VIXL_CPU_A64_H
+
+#include "vixl/globals.h"
+#include "vixl/a64/instructions-a64.h"
+
+namespace vixl {
+
+class CPU {
+ public:
+ // Initialise CPU support.
+ static void SetUp();
+
+ // Ensures the data at a given address and with a given size is the same for
+ // the I and D caches. I and D caches are not automatically coherent on ARM
+ // so this operation is required before any dynamically generated code can
+ // safely run.
+ static void EnsureIAndDCacheCoherency(void *address, size_t length);
+
+ // Handle tagged pointers.
+ template <typename T>
+ static T SetPointerTag(T pointer, uint64_t tag) {
+ VIXL_ASSERT(is_uintn(kAddressTagWidth, tag));
+
+ // Use C-style casts to get static_cast behaviour for integral types (T),
+ // and reinterpret_cast behaviour for other types.
+
+ uint64_t raw = (uint64_t)pointer;
+ VIXL_STATIC_ASSERT(sizeof(pointer) == sizeof(raw));
+
+ raw = (raw & ~kAddressTagMask) | (tag << kAddressTagOffset);
+ return (T)raw;
+ }
+
+ template <typename T>
+ static uint64_t GetPointerTag(T pointer) {
+ // Use C-style casts to get static_cast behaviour for integral types (T),
+ // and reinterpret_cast behaviour for other types.
+
+ uint64_t raw = (uint64_t)pointer;
+ VIXL_STATIC_ASSERT(sizeof(pointer) == sizeof(raw));
+
+ return (raw & kAddressTagMask) >> kAddressTagOffset;
+ }
+
+ private:
+ // Return the content of the cache type register.
+ static uint32_t GetCacheType();
+
+ // I and D cache line size in bytes.
+ static unsigned icache_line_size_;
+ static unsigned dcache_line_size_;
+};
+
+} // namespace vixl
+
+#endif // VIXL_CPU_A64_H
--
cgit