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-rw-r--r--src/common/cache_management.cpp60
1 files changed, 60 insertions, 0 deletions
diff --git a/src/common/cache_management.cpp b/src/common/cache_management.cpp
new file mode 100644
index 000000000..57810b76a
--- /dev/null
+++ b/src/common/cache_management.cpp
@@ -0,0 +1,60 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <cstring>
+
+#include "alignment.h"
+#include "cache_management.h"
+#include "common_types.h"
+
+namespace Common {
+
+#if defined(ARCHITECTURE_x86_64)
+
+// Most cache operations are no-ops on x86
+
+void DataCacheLineCleanByVAToPoU(void* start, size_t size) {}
+void DataCacheLineCleanAndInvalidateByVAToPoC(void* start, size_t size) {}
+void DataCacheLineCleanByVAToPoC(void* start, size_t size) {}
+void DataCacheZeroByVA(void* start, size_t size) {
+ std::memset(start, 0, size);
+}
+
+#elif defined(ARCHITECTURE_arm64)
+
+// BS/DminLine is log2(cache size in words), we want size in bytes
+#define EXTRACT_DMINLINE(ctr_el0) (1 << ((((ctr_el0) >> 16) & 0xf) + 2))
+#define EXTRACT_BS(dczid_el0) (1 << (((dczid_el0)&0xf) + 2))
+
+#define DEFINE_DC_OP(op_name, function_name) \
+ void function_name(void* start, size_t size) { \
+ size_t ctr_el0; \
+ asm volatile("mrs %[ctr_el0], ctr_el0\n\t" : [ctr_el0] "=r"(ctr_el0)); \
+ size_t cacheline_size = EXTRACT_DMINLINE(ctr_el0); \
+ uintptr_t va_start = reinterpret_cast<uintptr_t>(start); \
+ uintptr_t va_end = va_start + size; \
+ for (uintptr_t va = va_start; va < va_end; va += cacheline_size) { \
+ asm volatile("dc " #op_name ", %[va]\n\t" : : [va] "r"(va) : "memory"); \
+ } \
+ }
+
+#define DEFINE_DC_OP_DCZID(op_name, function_name) \
+ void function_name(void* start, size_t size) { \
+ size_t dczid_el0; \
+ asm volatile("mrs %[dczid_el0], dczid_el0\n\t" : [dczid_el0] "=r"(dczid_el0)); \
+ size_t cacheline_size = EXTRACT_BS(dczid_el0); \
+ uintptr_t va_start = reinterpret_cast<uintptr_t>(start); \
+ uintptr_t va_end = va_start + size; \
+ for (uintptr_t va = va_start; va < va_end; va += cacheline_size) { \
+ asm volatile("dc " #op_name ", %[va]\n\t" : : [va] "r"(va) : "memory"); \
+ } \
+ }
+
+DEFINE_DC_OP(cvau, DataCacheLineCleanByVAToPoU);
+DEFINE_DC_OP(civac, DataCacheLineCleanAndInvalidateByVAToPoC);
+DEFINE_DC_OP(cvac, DataCacheLineCleanByVAToPoC);
+DEFINE_DC_OP_DCZID(zva, DataCacheZeroByVA);
+
+#endif
+
+} // namespace Common