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https://github.com/Ryujinx/Ryujinx.git
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68 lines
1.8 KiB
C#
68 lines
1.8 KiB
C#
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using Ryujinx.Memory;
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using System;
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namespace Ryujinx.Cpu.AppleHv
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{
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static class HvVm
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{
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// This alignment allows us to use larger blocks on the page table.
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private const ulong AsIpaAlignment = 1UL << 30;
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private static int _addressSpaces;
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private static HvIpaAllocator _ipaAllocator;
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private static object _lock = new object();
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public static (ulong, HvIpaAllocator) CreateAddressSpace(MemoryBlock block)
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{
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HvIpaAllocator ipaAllocator;
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lock (_lock)
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{
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if (++_addressSpaces == 1)
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{
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HvApi.hv_vm_create(IntPtr.Zero).ThrowOnError();
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_ipaAllocator = ipaAllocator = new HvIpaAllocator();
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}
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else
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{
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ipaAllocator = _ipaAllocator;
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}
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}
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ulong baseAddress;
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lock (ipaAllocator)
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{
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baseAddress = ipaAllocator.Allocate(block.Size, AsIpaAlignment);
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}
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var rwx = hv_memory_flags_t.HV_MEMORY_READ | hv_memory_flags_t.HV_MEMORY_WRITE | hv_memory_flags_t.HV_MEMORY_EXEC;
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HvApi.hv_vm_map((ulong)block.Pointer, baseAddress, block.Size, rwx).ThrowOnError();
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return (baseAddress, ipaAllocator);
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}
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public static void DestroyAddressSpace(ulong address, ulong size)
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{
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HvApi.hv_vm_unmap(address, size);
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HvIpaAllocator ipaAllocator;
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lock (_lock)
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{
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if (--_addressSpaces == 0)
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{
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HvApi.hv_vm_destroy().ThrowOnError();
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}
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ipaAllocator = _ipaAllocator;
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}
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lock (ipaAllocator)
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{
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ipaAllocator.Free(address, size);
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}
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}
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}
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}
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