1  using System;
 2  
 3  namespace Ryujinx.Cpu.AppleHv
 4  {
 5      class HvIpaAllocator
 6      {
 7          private const ulong AllocationGranule = 1UL << 14;
 8          private const ulong IpaRegionSize = 1UL << 35;
 9  
10          private readonly PrivateMemoryAllocator.Block _block;
11  
12          public HvIpaAllocator()
13          {
14              _block = new PrivateMemoryAllocator.Block(null, IpaRegionSize);
15          }
16  
17          public ulong Allocate(ulong size, ulong alignment = AllocationGranule)
18          {
19              ulong offset = _block.Allocate(size, alignment);
20  
21              if (offset == PrivateMemoryAllocator.InvalidOffset)
22              {
23                  throw new InvalidOperationException($"No enough free IPA memory to allocate 0x{size:X} bytes with alignment 0x{alignment:X}.");
24              }
25  
26              return offset;
27          }
28  
29          public void Free(ulong offset, ulong size)
30          {
31              _block.Free(offset, size);
32          }
33      }
34  }