42 lines
1.6 KiB
C#
42 lines
1.6 KiB
C#
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namespace ARMeilleure.Memory
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{
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/// <summary>
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/// Indicates the type of a memory manager and the method it uses for memory mapping
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/// and address translation. This controls the code generated for memory accesses on the JIT.
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/// </summary>
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public enum MemoryManagerType
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{
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/// <summary>
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/// Complete software MMU implementation, the read/write methods are always called,
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/// without any attempt to perform faster memory access.
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/// </summary>
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SoftwareMmu,
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/// <summary>
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/// High level implementation using a software flat page table for address translation,
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/// used to speed up address translation if possible without calling the read/write methods.
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/// </summary>
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SoftwarePageTable,
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/// <summary>
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/// High level implementation with mappings managed by the host OS, effectively using hardware
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/// page tables. No address translation is performed in software and the memory is just accessed directly.
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/// </summary>
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HostMapped,
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/// <summary>
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/// Same as the host mapped memory manager type, but without masking the address within the address space.
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/// Allows invalid access from JIT code to the rest of the program, but is faster.
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/// </summary>
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HostMappedUnsafe
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}
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static class MemoryManagerTypeExtensions
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{
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public static bool IsHostMapped(this MemoryManagerType type)
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{
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return type == MemoryManagerType.HostMapped || type == MemoryManagerType.HostMappedUnsafe;
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}
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}
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}
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