using ARMeilleure.Memory; using System; using System.Runtime.InteropServices; namespace Ryujinx.Cpu.LightningJit.Cache { class JitCacheInvalidation { private static readonly int[] _invalidationCode = new int[] { unchecked((int)0xd53b0022), // mrs x2, ctr_el0 unchecked((int)0xd3504c44), // ubfx x4, x2, #16, #4 unchecked((int)0x52800083), // mov w3, #0x4 unchecked((int)0x12000c45), // and w5, w2, #0xf unchecked((int)0x1ac42064), // lsl w4, w3, w4 unchecked((int)0x51000482), // sub w2, w4, #0x1 unchecked((int)0x8a220002), // bic x2, x0, x2 unchecked((int)0x1ac52063), // lsl w3, w3, w5 unchecked((int)0xeb01005f), // cmp x2, x1 unchecked((int)0x93407c84), // sxtw x4, w4 unchecked((int)0x540000a2), // b.cs 3c unchecked((int)0xd50b7b22), // dc cvau, x2 unchecked((int)0x8b040042), // add x2, x2, x4 unchecked((int)0xeb02003f), // cmp x1, x2 unchecked((int)0x54ffffa8), // b.hi 2c unchecked((int)0xd5033b9f), // dsb ish unchecked((int)0x51000462), // sub w2, w3, #0x1 unchecked((int)0x93407c63), // sxtw x3, w3 unchecked((int)0x8a220000), // bic x0, x0, x2 unchecked((int)0xeb00003f), // cmp x1, x0 unchecked((int)0x540000a9), // b.ls 64 unchecked((int)0xd50b7520), // ic ivau, x0 unchecked((int)0x8b030000), // add x0, x0, x3 unchecked((int)0xeb00003f), // cmp x1, x0 unchecked((int)0x54ffffa8), // b.hi 54 unchecked((int)0xd5033b9f), // dsb ish unchecked((int)0xd5033fdf), // isb unchecked((int)0xd65f03c0), // ret }; private delegate void InvalidateCache(ulong start, ulong end); private readonly InvalidateCache _invalidateCache; private readonly ReservedRegion _invalidateCacheCodeRegion; private readonly bool _needsInvalidation; public JitCacheInvalidation(IJitMemoryAllocator allocator) { // On macOS and Windows, a different path is used to write to the JIT cache, which does the invalidation. if (RuntimeInformation.ProcessArchitecture == Architecture.Arm64) { ulong size = (ulong)_invalidationCode.Length * sizeof(int); ulong mask = (ulong)ReservedRegion.DefaultGranularity - 1; size = (size + mask) & ~mask; _invalidateCacheCodeRegion = new ReservedRegion(allocator, size); _invalidateCacheCodeRegion.ExpandIfNeeded(size); Marshal.Copy(_invalidationCode, 0, _invalidateCacheCodeRegion.Pointer, _invalidationCode.Length); _invalidateCacheCodeRegion.Block.MapAsRx(0, size); _invalidateCache = Marshal.GetDelegateForFunctionPointer(_invalidateCacheCodeRegion.Pointer); _needsInvalidation = true; } } public void Invalidate(IntPtr basePointer, ulong size) { if (_needsInvalidation) { _invalidateCache((ulong)basePointer, (ulong)basePointer + size); } } } }