106 lines
3.5 KiB
C#
106 lines
3.5 KiB
C#
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///////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: MpBootInfo.cs
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//
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// Note:
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// This structure holds values needed to bring the application processors
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// into protected mode.
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//
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using System;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using Microsoft.Singularity.Memory;
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namespace Microsoft.Singularity
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{
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[StructLayout(LayoutKind.Sequential, Pack=4)]
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[CLSCompliant(false)]
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public struct MpBootInfo
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{
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#if SINGULARITY_MP
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[AccessedByRuntime("referenced in c++")]
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public const uint MAX_CPU =
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# if MAX_CPU4
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4;
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# elif MAX_CPU3
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3;
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# elif MAX_CPU2
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2;
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# else
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# error "MAX_CPUx needs conversion definition."
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# endif // MAX_CPUX
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#else
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[AccessedByRuntime("referenced in c++")]
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public const uint MAX_CPU = 1;
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#endif // SINGULARITY_MP
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[AccessedByRuntime("referenced in c++")]
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public const uint Signature = 0x4d504249; // "MPBI"
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// Settings for next processor to enter protected mode
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[AccessedByRuntime("referenced in c++")]
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public uint signature;
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[AccessedByRuntime("referenced in c++")]
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public UIntPtr KernelStackBegin;
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[AccessedByRuntime("referenced in c++")]
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public UIntPtr KernelStack;
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[AccessedByRuntime("referenced in c++")]
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public UIntPtr KernelStackLimit;
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[AccessedByRuntime("referenced in c++")]
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public volatile int TargetCpu;
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[MethodImpl(MethodImplOptions.InternalCall)]
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[StackBound(16)]
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internal static unsafe extern MpBootInfo * HalGetMpBootInfo();
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[AccessedByRuntime("referenced in c++")]
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[MethodImpl(MethodImplOptions.InternalCall)]
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[StackBound(16)]
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internal static unsafe extern void HalReleaseMpStartupLock();
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public static unsafe bool PrepareForCpuStart(int targetCpu)
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{
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UIntPtr size = MemoryManager.PagePad(
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new UIntPtr(BootInfo.KERNEL_STACK_LIMIT - BootInfo.KERNEL_STACK_BEGIN)
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);
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MpBootInfo* mbi = HalGetMpBootInfo();
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mbi->KernelStackBegin = MemoryManager.KernelAllocate(
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MemoryManager.PagesFromBytes(size), null, 0, System.GCs.PageType.Stack);
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if (mbi->KernelStackBegin == UIntPtr.Zero)
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{
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mbi->KernelStackLimit = UIntPtr.Zero;
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mbi->KernelStack = UIntPtr.Zero;
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mbi->signature = 0;
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return false;
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}
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mbi->KernelStackLimit = mbi->KernelStackBegin + size;
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mbi->KernelStack = mbi->KernelStackLimit - (BootInfo.KERNEL_STACK_LIMIT - BootInfo.KERNEL_STACK);
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mbi->signature = Signature;
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mbi->TargetCpu = targetCpu;
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HalReleaseMpStartupLock();
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return true;
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}
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// NB attribute is necessary to get definition of MpBootInfo as
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// a struct by Bartok for all builds (including those that do not
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// use MpBootInfo).
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[AccessedByRuntime("referenced in c++")]
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public static unsafe MpBootInfo GetMpBootInfo()
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{
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MpBootInfo *ptr = HalGetMpBootInfo();
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return *ptr;
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}
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}
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}
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