////////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity - Singularity ABI
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  File:   PageTableService.csi
//
//  Note:
//

using System;
using System.Runtime.CompilerServices;

namespace Microsoft.Singularity.V1.Services
{
    public struct PageTableService
    {
        public readonly int id;

        [NoHeapAllocation]
        public static unsafe uint * GetPageTable();

#if UINTPTR_SUPPORT_IN_ABI
        [NoHeapAllocation]
        public static UIntPtr GetPageCount();

        [NoHeapAllocation]
        public static UIntPtr GetBaseAddress();
#endif

        [NoHeapAllocation]
        public static uint GetProcessTag();

        [NoHeapAllocation]
        public static UIntPtr Allocate(UIntPtr numPages);


        [NoHeapAllocation]
        public static UIntPtr AllocateExtend(UIntPtr addr,
                                             UIntPtr numPages);

        [NoHeapAllocation]
        public static void Free(UIntPtr addr,
                                UIntPtr numPages);

        [NoHeapAllocation]
        public static UIntPtr AllocateIOMemory(UIntPtr limit,
                                               UIntPtr bytes,
                                               UIntPtr alignment);

        [NoHeapAllocation]
        public static void FreeIOMemory(UIntPtr addr,
                                        UIntPtr bytes);

        [NoHeapAllocation]
        public static bool Query(UIntPtr queryAddr,
                                 out UIntPtr regionAddr,
                                 out UIntPtr regionSize);

        [NoHeapAllocation]
        public static void GetUsageStatistics(out ulong allocatedCount,
                                              out ulong allocatedBytes,
                                              out ulong freedCount,
                                              out ulong freedBytes);

        //////////////////////////////////////////////////////////////////////
#if !UINTPTR_SUPPORT_IN_ABI
        [NoHeapAllocation]
        public static uint GetPageCount();

        [NoHeapAllocation]
        public static uint GetBaseAddress();

        [NoHeapAllocation]
        public static uint Allocate(uint numPages);

        [NoHeapAllocation]
        public static uint AllocateExtend(uint addr,
                                          uint numPages);

        [NoHeapAllocation]
        public static void Free(uint addr,
                                uint numPages);

        [NoHeapAllocation]
        public static uint AllocateIOMemory(uint limit,
                                            uint bytes,
                                            uint alignment);

        [NoHeapAllocation]
        public static void FreeIOMemory(uint addr,
                                        uint bytes);

        [NoHeapAllocation]
        public static bool Query(uint queryAddr,
                                 out uint regionAddr,
                                 out uint regionSize);
#endif
    }
}