ams: support building unit test programs on windows/linux/macos

libraries/libstratosphere/source/os/impl/os_cache_impl.os.macos.hpp

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+namespace ams::os::impl {
+
+    inline void FlushDataCacheImpl(const void *addr, size_t size) {
+        #if defined(ATMOSPHERE_ARCH_ARM64)
+        {
+            /* Declare helper variables. */
+            uintptr_t cache_type_register = 0;
+            uintptr_t cache_line_size     = 0;
+            const uintptr_t end_addr      = reinterpret_cast<uintptr_t>(addr) + size;
+
+            /* Get the cache type register. */
+            __asm__ __volatile__("mrs %[cache_type_register], ctr_el0" : [cache_type_register]"=r"(cache_type_register));
+
+            /* Calculate cache line size. */
+            cache_line_size = 4 << ((cache_type_register >> 16) & 0xF);
+
+            /* Iterate, flushing cache lines. */
+            for (uintptr_t cur = reinterpret_cast<uintptr_t>(addr) & ~(cache_line_size - 1); cur < end_addr; cur += cache_line_size) {
+                __asm__ __volatile__ ("dc civac, %[cur]" :: [cur]"r"(cur));
+            }
+
+            /* Insert a memory barrier, now that memory has been flushed. */
+            __asm__ __volatile__("dsb sy" ::: "memory");
+        }
+        #elif defined(ATMOSPHERE_ARCH_X64) || defined(ATMOSPHERE_ARCH_X86)
+        /* Theoretically, do nothing here? */
+        AMS_UNUSED(addr, size);
+        __asm__ __volatile__("" ::: "memory");
+        #else
+        #error "Unknown architecture for macOS DataCache"
+        #endif
+    }
+
+    inline void FlushEntireDataCacheImpl() {
+        #if defined(ATMOSPHERE_ARCH_X64) || defined(ATMOSPHERE_ARCH_X86)
+        /* Theoretically, do nothing here? */
+        __asm__ __volatile__("" ::: "memory");
+        #elif defined(ATMOSPHERE_ARCH_ARM64)
+        AMS_ABORT("FlushEntireDataCacheImpl called on arm64 macOS");
+        #else
+        #error "Unknown architecture for macOS DataCache"
+        #endif
+    }
+
+}