Merge pull request #9697 from liamwhite/kcap

kernel: add KCapabilities

1 files changed, 58 insertions, 0 deletions

diff --git a/src/core/hle/kernel/svc_version.h b/src/core/hle/kernel/svc_version.h
new file mode 100644
index 000000000..e4f47b34b
--- /dev/null
+++ b/src/core/hle/kernel/svc_version.h
@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "common/literals.h"
+
+namespace Kernel::Svc {
+
+constexpr inline u32 ConvertToSvcMajorVersion(u32 sdk) {
+    return sdk + 4;
+}
+constexpr inline u32 ConvertToSdkMajorVersion(u32 svc) {
+    return svc - 4;
+}
+
+constexpr inline u32 ConvertToSvcMinorVersion(u32 sdk) {
+    return sdk;
+}
+constexpr inline u32 ConvertToSdkMinorVersion(u32 svc) {
+    return svc;
+}
+
+union KernelVersion {
+    u32 value;
+    BitField<0, 4, u32> minor_version;
+    BitField<4, 13, u32> major_version;
+};
+
+constexpr inline u32 EncodeKernelVersion(u32 major, u32 minor) {
+    return decltype(KernelVersion::minor_version)::FormatValue(minor) |
+           decltype(KernelVersion::major_version)::FormatValue(major);
+}
+
+constexpr inline u32 GetKernelMajorVersion(u32 encoded) {
+    return std::bit_cast<decltype(KernelVersion::major_version)>(encoded).Value();
+}
+
+constexpr inline u32 GetKernelMinorVersion(u32 encoded) {
+    return std::bit_cast<decltype(KernelVersion::minor_version)>(encoded).Value();
+}
+
+// Nintendo doesn't support programs targeting SVC versions < 3.0.
+constexpr inline u32 RequiredKernelMajorVersion = 3;
+constexpr inline u32 RequiredKernelMinorVersion = 0;
+constexpr inline u32 RequiredKernelVersion =
+    EncodeKernelVersion(RequiredKernelMajorVersion, RequiredKernelMinorVersion);
+
+// This is the highest SVC version supported, to be updated on new kernel releases.
+// NOTE: Official kernel versions have SVC major = SDK major + 4, SVC minor = SDK minor.
+constexpr inline u32 SupportedKernelMajorVersion = ConvertToSvcMajorVersion(15);
+constexpr inline u32 SupportedKernelMinorVersion = ConvertToSvcMinorVersion(3);
+constexpr inline u32 SupportedKernelVersion =
+    EncodeKernelVersion(SupportedKernelMajorVersion, SupportedKernelMinorVersion);
+
+} // namespace Kernel::Svc