697 lines
24 KiB
C#
697 lines
24 KiB
C#
// ----------------------------------------------------------------------------
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ----------------------------------------------------------------------------
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using System;
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using System.Runtime.InteropServices;
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using System.Runtime.CompilerServices;
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using System.Threading;
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using Microsoft.Singularity.Isal;
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using Microsoft.Singularity.Hal;
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using Microsoft.Singularity.Io;
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namespace Microsoft.Singularity.Hal
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{
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//
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// Platform is the basic abstraction of the HAL execution platform
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//
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// Part of the platform consts
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//
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[CLSCompliant(false)]
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[AccessedByRuntime("referenced in c++", AllFields = true)]
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[StructLayout(LayoutKind.Sequential, Pack=4)]
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public class Platform
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{
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///////////////////////////////////////////////////////////////////////
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// Constants: these remain the same on all platforms.
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///////////////////////////////////////////////////////////////////////
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// TODO: Fix case of constants to camel case
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[AccessedByRuntime("referenced in c++")]
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// 4KB is currently the only supported size
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internal const uint PAGE_SIZE = 0x00001000; // 4KB
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// This is the ABI Stub (MpSyscalls.x86)
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[AccessedByRuntime("referenced in c++")]
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internal const uint MP_ABI_BASE = 0x00600000;
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//
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// These constants control the gross layout of *virtual*
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// memory
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//
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// The physical address and extent of the high-memory
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// range to map into the Kernel space, and mark
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// "uncached". This window is for communicating with
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// hardware.
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[AccessedByRuntime("referenced in c++")]
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public const uint UNCACHED_PHYSICAL = 0xFE000000;
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[AccessedByRuntime("referenced in c++")]
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public const uint UNCACHED_MAPPED = 0x02000000;
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// This is the amount of *contiguous, physical* memory
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// to reserve at boot for use as I/O memory
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public const uint IO_MEMORY_SIZE = 0x00800000; // 8MB
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// This determines where the kernel/user boundary is.
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// Currently, it needs to be multiple of 1GB.
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[AccessedByRuntime("referenced in c++")]
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internal const uint KERNEL_BOUNDARY = 0x40000000; // 1GB
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// This determines the maximum virtual address
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// we will use. Setting this to less than the
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// machine's maximum pointer size can reduce the
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// overhead of paging structures.
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//
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// NOTE: we are not currently safe to use the top
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// bit of addresses (because of the "mark" bit in the
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// multi-use word header), so restrict ourselves to the
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// bottom 2GB.
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[AccessedByRuntime("referenced in c++")]
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public const uint MAX_VIRTUAL_ADDR = 0x80000000; // 2GB
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// Exit Codes:
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[AccessedByRuntime("referenced in c++")]
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internal const int EXIT_AND_RESTART = 0x1fff;
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[AccessedByRuntime("referenced in c++")]
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internal const int EXIT_AND_SHUTDOWN = 0x1ffe;
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[AccessedByRuntime("referenced in c++")]
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internal const int EXIT_AND_WARMBOOT = 0x1ffd;
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[AccessedByRuntime("referenced in c++")]
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internal const int EXIT_AND_HALT = 0x1ffc;
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///////////////////////////////////////////////////////////////////////
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// Boot configuration information: this is all filled out by the loader
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///////////////////////////////////////////////////////////////////////
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// Size of instance; this is a versioning/consistency check
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[AccessedByRuntime("referenced in c++")]
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public readonly int Size;
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#if ISA_IX64
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr Dummy;
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#endif
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[AccessedByRuntime("referenced in c++")]
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public readonly uint BootYear;
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[AccessedByRuntime("referenced in c++")]
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public readonly uint BootMonth;
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[AccessedByRuntime("referenced in c++")]
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public readonly uint BootDay;
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[AccessedByRuntime("referenced in c++")]
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public readonly uint BootHour;
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[AccessedByRuntime("referenced in c++")]
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public readonly uint BootMinute;
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[AccessedByRuntime("referenced in c++")]
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public readonly uint BootSecond;
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// Max # of CPUs allowed. !!! is this a long term thing? Should it be a constant?
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[AccessedByRuntime("referenced in c++")]
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public readonly int CpuMaxCount;
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[AccessedByRuntime("referenced in c++")]
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public readonly int CpuRealCount;
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// Warm boot count (0 = cold boot, 1 = first warm boot, etc.)
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[AccessedByRuntime("referenced in c++")]
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public readonly int BootCount;
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// Description of memory
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// @todo: this is a simple description of devices in the physical address space.
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// Eventually we want a richer way for HAL to communicate the memory layout to
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// S, rather than having S make assumptions about where HAL is and isn't using memory.
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[AccessedByRuntime("referenced in c++")]
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// Field must be integral for 16-bit boot code
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public readonly UIntPtr Smap32;
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public unsafe Microsoft.Singularity.SMAPINFO *Smap {
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[NoHeapAllocation]
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get {
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return (Microsoft.Singularity.SMAPINFO *) Smap32;
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}
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}
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[AccessedByRuntime("referenced in c++")]
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public readonly int SmapCount;
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// Lowest address which should be accessed as physical memory
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr PhysicalBase;
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//For now I'm just doing a single communication channel from subservient kernel
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//to the BSP kernel.
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[AccessedByRuntime("referenced in c++")]
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unsafe public readonly uint*OutgoingMessage;
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[AccessedByRuntime("referenced in c++")]
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unsafe public readonly int* OutgoingCount;
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[AccessedByRuntime("referenced in c++")]
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unsafe public readonly uint*IncomingFree; //previously sent messages that cane be safely freed
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[AccessedByRuntime("referenced in c++")]
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unsafe public readonly int* IncomingFreeCount;
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[AccessedByRuntime("referenced in c++")]
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unsafe public readonly uint*IncomingMessage; //messages bound for this kernel
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[AccessedByRuntime("referenced in c++")]
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unsafe public readonly int* IncomingCount;
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[AccessedByRuntime("referenced in c++")]
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unsafe public readonly uint*OutgoingFree; // messages that this kernel has processed
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[AccessedByRuntime("referenced in c++")]
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unsafe public readonly int* OutgoingFreeCount;
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[AccessedByRuntime("referenced in c++")]
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public readonly uint MaxBufferLength;
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[AccessedByRuntime("referenced in c++")]
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public readonly uint thisDestinationId;
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[AccessedByRuntime("referenced in c++")]
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public readonly uint hasApic;
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public int ApicId {
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[NoHeapAllocation]
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get {
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#if ISA_IX
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if(hasApic == 1) {
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// THIS SHOULD GO AWAY. WE SHOULD:
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// - 1. CHECK HEAP ALLOCATOR INITIALIZED AND PROCESSOR TABLE
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// - YES, return info from processor
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// - NO, return 0
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uint p0, p1, p2, p3;
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Isa.ReadCpuid((uint)1, out p0, out p1, out p2, out p3);
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return (int)((p1 & 0xFF000000) >> 24);
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}
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return 0;
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#elif ISA_ARM
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return 0;
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#else
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#error "E_UNSUPPORTED_PLATFORM"
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#endif
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}
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}
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//
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// This represents "boot memory" in which
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// managed structures are allocated before the
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// GC and memory manager is initialized. These
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// pages must be marked early in MM initialization
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// so that they are known as nonGC pages.
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//
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// It is OK for this to be null if a given platform
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// allocates these classes in memory that is otherwise
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// accounted for.
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//
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// Examples are the Platform class, and each
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// processor class.
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//
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr BootAllocatedMemory;
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr BootAllocatedMemorySize;
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// Command line (if any) given to HAL launcher.
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// !!! either generalize this or distill it to specific options.
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[AccessedByRuntime("referenced in c++")]
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// Field must be integral for 16-bit boot code
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public readonly UIntPtr CommandLine32;
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public unsafe char * CommandLine {
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[NoHeapAllocation]
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get {
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return (char *) CommandLine32;
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}
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}
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[AccessedByRuntime("referenced in c++")]
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public readonly int CommandLineCount;
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// CpuContext record is stored off of FS at the value stored at the following offset
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// of fs. A platform is guaranteed to have 2 pointers available at this offset.
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[AccessedByRuntime("referenced in c++")]
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public readonly unsafe int CpuRecordPointerOffset;
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[AccessedByRuntime("referenced in c++")]
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public readonly unsafe int ThreadRecordPointerOffset;
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// Various logging buffers
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// !!! Move these out of HAL
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr LogRecordBuffer;
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr LogRecordSize;
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr LogTextBuffer;
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr LogTextSize;
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// Kernel Dll (kernel.x86) where S execution will begin;
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// this is reported to S for use in debugging infrastructure
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr KernelDllBase;
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr KernelDllSize;
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr KernelDllFirstPage; // first page may be disjoint on CE
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// Initial minidump file address (if any)
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr MiniDumpBase;
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[AccessedByRuntime("referenced in c++")]
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public readonly UIntPtr MiniDumpLimit;
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// TODO: Remove DebuggerType; replace with BOOL and always go through HAL
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// Debugger type to attach to
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[AccessedByRuntime("referenced in c++")]
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public readonly int DebuggerType;
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// Debugger type enumeration
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[AccessedByRuntime("referenced in c++")]
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public const int DEBUGGER_NONE = 0;
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[AccessedByRuntime("referenced in c++")]
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public const int DEBUGGER_SERIAL = 1;
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[AccessedByRuntime("referenced in c++")]
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public const int DEBUGGER_1394 = 2;
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// EntryPoint return values
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[AccessedByRuntime("referenced in c++")]
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public const int SUCCESS = 0;
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[AccessedByRuntime("referenced in c++")]
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public const int ERROR_BAD_SIZE = 1;
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[AccessedByRuntime("referenced in c++")]
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public const int ERROR_BAD_PLATFORM = 2;
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///////////////////////////////////////////////////////////////////////
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// Platform abstractions - these are filled in by the HAL during kernel
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// initialization
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///////////////////////////////////////////////////////////////////////
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[AccessedByRuntime("referenced in c++")]
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public static Platform thePlatform;
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[AccessedByRuntime("referenced in c++")]
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protected Cpu bootCpu;
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public static Platform ThePlatform
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{
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[Inline]
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[NoHeapAllocation]
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get {
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return thePlatform;
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}
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}
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public static Cpu BootCpu
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{
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[Inline]
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[NoHeapAllocation]
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get {
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return thePlatform.bootCpu;
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}
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}
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public static Cpu CurrentCpu
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{
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[Inline]
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[NoHeapAllocation]
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get {
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return GetCurrentCpu();
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}
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}
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[AccessedByRuntime("accessed by C++")]
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[Inline]
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[NoHeapAllocation]
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public static Cpu Cpu(int id)
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{
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return thePlatform.GetCpu(id);
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}
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// Returns the current processor. Note that in general you need to
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// have preemption disabled for this to return a meaningful value.
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[AccessedByRuntime("defined in hal.cpp")]
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[MethodImpl(MethodImplOptions.InternalCall)]
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[NoHeapAllocation]
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[StackBound(32)]
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public static extern Cpu GetCurrentCpu();
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// Platform is initially configured before Kernel.Main. At this point
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// it is a minimal shell containing the boot records and the boot processor
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// information. Services are not available until InitializeServices is
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// called later (which requires the object heap to be set up.)
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// called before boot; cannot allocate memory
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[NoHeapAllocation]
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[AccessedByRuntime("referenced in c++")]
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public unsafe void Initialize(Cpu bootCpu)
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{
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this.bootCpu = bootCpu;
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thePlatform = this;
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}
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/// Platform
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#region BootInformation
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// Sanity Check
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public uint RecSize;
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// Debug Stub Information
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#if ISA_IX
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public ushort DebugBasePort;
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#elif ISA_ARM
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public uint DebugBasePort;
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#endif
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public ushort DebugSpinBase;
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public uint TwiddleSpinBase;
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// Self-descriptive information
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public ulong Info32;
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public ulong Kill32;
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public uint KillAction;
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// Location (in high memory) of the executable images
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public ulong DumpAddr32;
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// File image table ???
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public ulong FileImageTableBase32;
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public uint FileImageTableEntries;
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// Extent of that data
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public uint DumpSize32;
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public ulong DumpRemainder;
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// Marks the highest address used by the kernel image (undumped from high memory)
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public ulong DumpLimit;
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public ulong NativeContext;
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public ulong Cpus;
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#if ISA_IX64
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public ulong Ppml432; // pointer to Page Map Level-4
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public ulong AddrTss; // pointer to the 64-bit TSS containing the IST stack table
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#endif
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// IDT and PIC
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public ushort BiosPicMask;
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public byte BiosWarmResetCmos;
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public uint BiosWarmResetVector;
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public uint Info16;
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// Temporary IDT
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public ulong IdtEnter0;
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public ulong IdtEnter1;
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public ulong IdtEnterN;
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public ulong IdtTarget;
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public ulong Pdpt32;
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//
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// This is the kernel's operating map that secondary processors
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// must use. It may be updated by the kernel during the CPU 0
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// initialization process.
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//
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// Initially set to the same value as Pdpt32 by singboot when
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// CPU 0 is initialized.
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//
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public ulong KernelPdpt64;
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public ulong Undump;
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// PCI Information (V2.0+)
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public uint PciBiosAX;
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public uint PciBiosBX;
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public uint PciBiosCX;
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public uint PciBiosEDX;
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// BIOS Information
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public ulong AcpiRoot32;
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public ulong PnpNodesAddr32;
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public uint PnpNodesSize32;
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public ulong SmbiosRoot32;
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public ulong DmiRoot32;
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public uint IsaCsns;
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public ushort IsaReadPort;
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public uint Ebda32;
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public uint MpFloat32;
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// 1394 Information
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public ulong Ohci1394Base;
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public ulong Ohci1394BufferAddr32;
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public uint Ohci1394BufferSize32;
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// VESA Information
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public ulong VesaBuffer;
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// MP specific variables
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public ulong MpEnter32; // Entry point
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public uint MpCpuCount; // No of AP's booted
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public uint MpStatus32; // Error indicator
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public ulong MpStartupLock32; // Pointer to MP init lock var
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public Microsoft.Singularity.MpBootInfo MpBootInfo;
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#endregion // BootInformation
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//////////////////////////////////////////////////////////////////////
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// Kernel fields initialized by early kernel code
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//////////////////////////////////////////////////////////////////////
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private Cpu[] processors;
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private HalDevices devices;
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[NoHeapAllocation]
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public void RegisterCpu(Cpu p)
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{
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DebugStub.Assert(processors != null);
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DebugStub.Assert(p.Id >= 0);
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DebugStub.Assert(p.Id < processors.Length);
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DebugStub.Assert((processors[p.Id] == null) || (processors[p.Id] == p));
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processors[p.Id] = p;
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}
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// This routine is used to report GC objects which are manufactured by the
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// HAL, in order to trace their reference fields. (Note that such objects
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// must also end up on pages labelled NonGC for tracing, etc to work correctly.)
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internal void VisitSpecialData(System.GCs.ReferenceVisitor visitor)
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{
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// The Platform object and the processor objects are all allocated
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// on fixed pages, so must be explicitly traced.
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visitor.VisitReferenceFields(thePlatform);
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foreach (Cpu p in processors) {
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if (p != null) {
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visitor.VisitReferenceFields(p);
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}
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}
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}
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[NoHeapAllocation]
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public bool DisableInterrupts()
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{
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return Isa.DisableInterrupts();
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}
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[NoHeapAllocation]
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public void EnableInterrupts()
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{
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Isa.EnableInterrupts();
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}
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[NoHeapAllocation]
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public bool AreInterruptsDisabled()
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{
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return Isa.AreInterruptsDisabled();
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}
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// Halt causes the current CPU to cease execution until an interrupt occurs.
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[NoHeapAllocation]
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public void Halt()
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{
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// @BUG this is broken - we can migrate to another CPU
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CurrentCpu.halted = true;
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Isa.Halt();
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}
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// RendezvousCpus sends a rendezvous to the other processors.
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[NoHeapAllocation]
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public void RendezvousCpus()
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{
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// Not implemented
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}
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// Kill exits the platform environment.
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[AccessedByRuntime("referenced in c++")]
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[MethodImpl(MethodImplOptions.InternalCall)]
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[StackBound(64)]
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[NoHeapAllocation]
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private static extern void NativeKill(int exitCode);
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[NoHeapAllocation]
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public void Kill(int exitCode)
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{
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NativeKill(exitCode);
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}
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// TBD: there is currently no standard processor array, it is maintained by the HAL.
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// (Not sure if this is valuable.)
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[NoHeapAllocation]
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public Cpu GetCpu(int i)
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{
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return processors[i];
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}
|
|
|
|
// This will cause the CPUs to get enabled; each will have EntryPoint called
|
|
public void EnableMoreCpus(int cpus)
|
|
{
|
|
//
|
|
// Currently a separate code path in kernel.cs calls the HalDevices.StartApProcessors()
|
|
// due to layering issues with the HalPic's in the kernel, and the HAL being below
|
|
// the kernel not allowed to call up into the kernel. Eventually when these
|
|
// devices move into the HAL (and PNP resource assignment issues are resolved) this
|
|
// code will call StartAppProcessors(cpus).
|
|
//
|
|
}
|
|
|
|
#region Debugging
|
|
[NoHeapAllocation]
|
|
public void FreezeAllCpus()
|
|
{
|
|
devices.FreezeProcessors();
|
|
}
|
|
#endregion // debugging
|
|
|
|
#region Timer
|
|
// Request that an interrupt fire immediately on the given processor.
|
|
// Note that this may be called on other CPUs to facilitate IPC.
|
|
|
|
[NoHeapAllocation]
|
|
public void WakeNow(int cpu)
|
|
{
|
|
int fromCpu = Microsoft.Singularity.Processor.GetCurrentProcessorId();
|
|
devices.SendFixedIPI((byte)Kernel.HalIpiInterrupt, fromCpu, cpu);
|
|
}
|
|
#endregion // Timer
|
|
|
|
// This is called to fully initialize the platform
|
|
public void InitializeServices()
|
|
{
|
|
processors = new Cpu[CpuMaxCount];
|
|
processors[0] = bootCpu;
|
|
bootCpu.InitializeServices();
|
|
|
|
// TBD
|
|
}
|
|
|
|
#region HAL
|
|
// Get our HalDevices interface from the externally implemented HAL
|
|
public static void InitializeHal(Processor processor)
|
|
{
|
|
thePlatform.devices = (HalDevices)HalDevicesFactory.Initialize(processor);
|
|
}
|
|
|
|
public static void ReleaseResources()
|
|
{
|
|
thePlatform.devices.ReleaseResources();
|
|
}
|
|
|
|
//
|
|
// Adding and removing interrupts from the Pic.
|
|
//
|
|
[NoHeapAllocation]
|
|
public static void EnableIoInterrupt(byte irq)
|
|
{
|
|
thePlatform.devices.EnableIoInterrupt(irq);
|
|
}
|
|
|
|
[NoHeapAllocation]
|
|
public static void DisableIoInterrupt(byte irq)
|
|
{
|
|
thePlatform.devices.DisableIoInterrupt(irq);
|
|
}
|
|
|
|
[NoHeapAllocation]
|
|
public static bool InternalInterrupt(byte interrupt)
|
|
{
|
|
return thePlatform.devices.InternalInterrupt(interrupt);
|
|
}
|
|
|
|
[NoHeapAllocation]
|
|
public static byte GetMaximumIrq()
|
|
{
|
|
return thePlatform.devices.GetMaximumIrq();
|
|
}
|
|
|
|
[NoHeapAllocation]
|
|
public static int GetProcessorCount()
|
|
{
|
|
return thePlatform.devices.GetProcessorCount();
|
|
}
|
|
|
|
public static void StartApProcessors(int cpus)
|
|
{
|
|
thePlatform.devices.StartApProcessors(cpus);
|
|
}
|
|
|
|
[NoHeapAllocation]
|
|
public static void ResetApProcessors()
|
|
{
|
|
thePlatform.devices.ResetApProcessors();
|
|
}
|
|
|
|
[NoHeapAllocation]
|
|
public static void FreezeProcessors()
|
|
{
|
|
thePlatform.devices.FreezeProcessors();
|
|
}
|
|
|
|
// send fixed interrupt
|
|
[NoHeapAllocation]
|
|
public static void SendFixedIPI(byte vector, int from, int to)
|
|
{
|
|
thePlatform.devices.SendFixedIPI(vector, from, to);
|
|
}
|
|
|
|
[NoHeapAllocation]
|
|
public static void BroadcastFixedIPI(byte vector, bool includeSelf)
|
|
{
|
|
thePlatform.devices.BroadcastFixedIPI(vector, includeSelf);
|
|
}
|
|
|
|
[NoHeapAllocation]
|
|
public static void ClearFixedIPI(int interrupt)
|
|
{
|
|
thePlatform.devices.ClearFixedIPI(interrupt);
|
|
}
|
|
|
|
public static byte TranslatePciInterrupt(byte currentInterruptLine,
|
|
byte pciInterruptPin,
|
|
PciPort pciPort)
|
|
{
|
|
return thePlatform.devices.TranslatePciInterrupt(currentInterruptLine,
|
|
pciInterruptPin,
|
|
pciPort);
|
|
}
|
|
#endregion // HAL
|
|
|
|
}
|
|
}
|
|
|