[CPU] Increased base JIT cache size (#22)

@MaxLastBreath found that The Legend of Zelda: Tears of the Kingdom experiences inconsistent crashing with a limited JIT cache size. Increasing the cache size seems to help with this, and increasing it shouldn't degrade performance for other titles.

@LotP plans to look this over later, but for now, this should suffice as a fix for affected users.

Reviewed-on: https://git.ryujinx.app/projects/Ryubing/pulls/22

src/Ryujinx.Cpu/LightningJit/Cache/JitCache.cs

@@ -17,7 +17,8 @@ namespace Ryujinx.Cpu.LightningJit.Cache
         private static readonly int _pageMask = _pageSize - 1;
 
         private const int CodeAlignment = 4; // Bytes.
-        private const int CacheSize = 256 * 1024 * 1024;
+        // TODO: JIT Cache size should be application dependent, not global.
+        private const int CacheSize = 1024 * (1024 * 1024); // Megabytes * Size of Megabytes (since its in bytes).
 
         private static JitCacheInvalidation _jitCacheInvalidator;
 
@@ -33,6 +34,14 @@ namespace Ryujinx.Cpu.LightningJit.Cache
         [SupportedOSPlatform("windows")]
         [LibraryImport("kernel32.dll", SetLastError = true)]
         public static partial nint FlushInstructionCache(nint hProcess, nint lpAddress, nuint dwSize);
+        
+        [SupportedOSPlatform("macos")]
+        [LibraryImport("libSystem.dylib", EntryPoint = "sys_icache_invalidate")]
+        internal static partial void SysICacheInvalidate(nint start, nuint len);
+
+        [SupportedOSPlatform("linux")]
+        [LibraryImport("libgcc_s.so.1", EntryPoint = "__clear_cache")]
+        internal static partial void ClearCache(nint begin, nint end);
 
         public static void Initialize(IJitMemoryAllocator allocator)
         {