mirror of
https://github.com/Ryujinx/Ryujinx.git
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129 lines
5 KiB
C#
129 lines
5 KiB
C#
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using Ryujinx.Cpu.AppleHv.Arm;
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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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class HvAddressSpace : IDisposable
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{
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private const ulong KernelRegionBase = unchecked((ulong)-(1L << 39));
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private const ulong KernelRegionCodeOffset = 0UL;
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private const ulong KernelRegionCodeSize = 0x2000UL;
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private const ulong KernelRegionTlbiEretOffset = KernelRegionCodeOffset + 0x1000UL;
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private const ulong KernelRegionEretOffset = KernelRegionTlbiEretOffset + 4UL;
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public const ulong KernelRegionEretAddress = KernelRegionBase + KernelRegionEretOffset;
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public const ulong KernelRegionTlbiEretAddress = KernelRegionBase + KernelRegionTlbiEretOffset;
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private const ulong AllocationGranule = 1UL << 14;
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private readonly ulong _asBase;
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private readonly ulong _asSize;
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private readonly ulong _backingSize;
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private readonly HvAddressSpaceRange _userRange;
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private readonly HvAddressSpaceRange _kernelRange;
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private MemoryBlock _kernelCodeBlock;
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public HvAddressSpace(MemoryBlock backingMemory, ulong asSize)
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{
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(_asBase, var ipaAllocator) = HvVm.CreateAddressSpace(backingMemory);
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_asSize = asSize;
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_backingSize = backingMemory.Size;
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_userRange = new HvAddressSpaceRange(ipaAllocator);
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_kernelRange = new HvAddressSpaceRange(ipaAllocator);
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_kernelCodeBlock = new MemoryBlock(AllocationGranule);
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InitializeKernelCode(ipaAllocator);
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}
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private void InitializeKernelCode(HvIpaAllocator ipaAllocator)
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{
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// Write exception handlers.
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for (ulong offset = 0; offset < 0x800; offset += 0x80)
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{
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// Offsets:
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// 0x0: Synchronous
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// 0x80: IRQ
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// 0x100: FIQ
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// 0x180: SError
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_kernelCodeBlock.Write(KernelRegionCodeOffset + offset, 0xD41FFFE2u); // HVC #0xFFFF
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_kernelCodeBlock.Write(KernelRegionCodeOffset + offset + 4, 0xD69F03E0u); // ERET
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}
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_kernelCodeBlock.Write(KernelRegionTlbiEretOffset, 0xD508831Fu); // TLBI VMALLE1IS
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_kernelCodeBlock.Write(KernelRegionEretOffset, 0xD69F03E0u); // ERET
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ulong kernelCodePa = ipaAllocator.Allocate(AllocationGranule);
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HvApi.hv_vm_map((ulong)_kernelCodeBlock.Pointer, kernelCodePa, AllocationGranule, hv_memory_flags_t.HV_MEMORY_READ | hv_memory_flags_t.HV_MEMORY_EXEC).ThrowOnError();
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_kernelRange.Map(KernelRegionCodeOffset, kernelCodePa, KernelRegionCodeSize, ApFlags.UserNoneKernelReadExecute);
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}
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public void InitializeMmu(ulong vcpu)
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{
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HvApi.hv_vcpu_set_sys_reg(vcpu, hv_sys_reg_t.HV_SYS_REG_VBAR_EL1, KernelRegionBase + KernelRegionCodeOffset);
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HvApi.hv_vcpu_set_sys_reg(vcpu, hv_sys_reg_t.HV_SYS_REG_TTBR0_EL1, _userRange.GetIpaBase());
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HvApi.hv_vcpu_set_sys_reg(vcpu, hv_sys_reg_t.HV_SYS_REG_TTBR1_EL1, _kernelRange.GetIpaBase());
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HvApi.hv_vcpu_set_sys_reg(vcpu, hv_sys_reg_t.HV_SYS_REG_MAIR_EL1, 0xffUL);
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HvApi.hv_vcpu_set_sys_reg(vcpu, hv_sys_reg_t.HV_SYS_REG_TCR_EL1, 0x00000011B5193519UL);
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HvApi.hv_vcpu_set_sys_reg(vcpu, hv_sys_reg_t.HV_SYS_REG_SCTLR_EL1, 0x0000000034D5D925UL);
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}
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public bool GetAndClearUserTlbInvalidationPending()
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{
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return _userRange.GetAndClearTlbInvalidationPending();
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}
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public void MapUser(ulong va, ulong pa, ulong size, MemoryPermission permission)
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{
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pa += _asBase;
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lock (_userRange)
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{
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_userRange.Map(va, pa, size, GetApFlags(permission));
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}
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}
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public void UnmapUser(ulong va, ulong size)
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{
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lock (_userRange)
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{
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_userRange.Unmap(va, size);
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}
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}
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public void ReprotectUser(ulong va, ulong size, MemoryPermission permission)
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{
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lock (_userRange)
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{
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_userRange.Reprotect(va, size, GetApFlags(permission));
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}
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}
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private static ApFlags GetApFlags(MemoryPermission permission)
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{
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return permission switch
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{
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MemoryPermission.None => ApFlags.UserNoneKernelRead,
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MemoryPermission.Execute => ApFlags.UserExecuteKernelRead,
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MemoryPermission.Read => ApFlags.UserReadKernelRead,
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MemoryPermission.ReadAndWrite => ApFlags.UserReadWriteKernelReadWrite,
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MemoryPermission.ReadAndExecute => ApFlags.UserReadExecuteKernelRead,
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MemoryPermission.ReadWriteExecute => ApFlags.UserReadWriteExecuteKernelReadWrite,
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_ => throw new ArgumentException($"Permission \"{permission}\" is invalid.")
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};
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}
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public void Dispose()
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{
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_userRange.Dispose();
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_kernelRange.Dispose();
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HvVm.DestroyAddressSpace(_asBase, _backingSize);
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}
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}
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}
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