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singrdk/base/Kernel/Singularity/Memory/FlatPages.cs

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////////////////////////////////////////////////////////////////////////////////
//
// Microsoft Research Singularity
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// File: Legacy.cs - Primitive memory manager
//
// Note:
//
#if !PAGING
//#define TEST
//#define VERBOSE
//#define MP_VERBOSE
//#define COMPLEX_TEST
#if MARKSWEEPCOLLECTOR
#define ALLOW_BOOT_ARGLIST // Cannot be used during boot for GCs w/ write barrier
#endif
#define NO__TRACE_PAGES
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Threading;
using System.GCs;
using Microsoft.Singularity;
using Microsoft.Singularity.Hal; // for IHal
namespace Microsoft.Singularity.Memory
{
[NoCCtor]
[CLSCompliant(false)]
public class FlatPages {
// WARNING: don't initialize any static fields in this class
// without manually running the class constructor at startup!
//private const uint PageMask = MemoryManager.PageSize - 1;
private const uint SmallSize = MemoryManager.PageSize;
private static UIntPtr addressLimit;
private static UIntPtr pageCount;
private static ulong allocatedBytes;
private static ulong allocatedCount;
private static ulong freedBytes;
private static ulong freedCount;
private static SpinLock pageLock;
private static unsafe uint *pageTable;
// We keep two lists of free pages:
// The freeList has pages that can be used at any moment.
// The saveList has pages that were reserved for growing a region.
private static FreeNode freeListTail;
private static FreeNode saveListTail;
private static unsafe FreeNode *freeList;
private static unsafe FreeNode *saveList;
// This is a representation of MemoryAffinity. IMPORTANT: The
// rule of the thumb is, always check "isValid" flag before
// using any of the member variables. The reason is not all
// subMemoryMap can be created from the initial freeList. The
// caveat is some top memory addresses have been allocated at
// boot process (e.g. from experiences almost 8 MB of memory
// has been taken). SRAT table usually gives separate entry
// for the first 640 KB region. Since the first 8 MB has gone
// from the free list, we could not create the first
// SubMemoryMap that represents the 640 KB region (hence
// isValid is false for this SubMemoryMap).
private struct SubMemoryMap
{
public int memoryId;
public UIntPtr baseAddr;
public UIntPtr endAddr;
public UIntPtr length;
public uint domain;
public bool isValid;
}
// This is a per-processor memory map/address space. Each
// processor will have each own free list. Future memory
// allocation for MP must consult this structure, the free
// list in particular. Note: Be careful that, the memory area
// from baseAddr to endAddr does not necessary belong to this
// processor. A processor is not guaranteed to have contiguous
// memory addresses in NUMA node. The "length" field
// specifies how big of memory this processor has. Other
// Notes:
// . Maybe in the future we need to create an array of
// sub memory maps within this processorMemoryMap
// . Code for accounting has not been written
private struct ProcessorMemoryMap
{
public int processorId;
public uint domain;
public UIntPtr baseAddr;
public UIntPtr endAddr;
public UIntPtr length;
public FreeNode procFreeListTail;
public FreeNode procSaveListTail;
public unsafe FreeNode *procFreeList;
public unsafe FreeNode *procSaveList;
public bool isInitialized;
}
// This is a domain mapping for dividing memory across
// processors evenly. Using this domain, we ensure that each
// processor gets memory from the domain where it belongs. If
// SRAT table is not at available, we just create 1 domain.
// Notes:
// . Currently, the code does not support a domain that does not
// have any memory. In other words, currently, we do not allow
// "borrowing" memory from other domains. If this is the case,
// an error will generated and a following DebugStub.Break
private struct DomainMap
{
public uint domain;
public ProcessorMemoryMap [] processors;
public SubMemoryMap [] subMemories;
public UIntPtr totalMemSize;
public FreeNode domFreeListTail;
public FreeNode domSaveListTail;
public unsafe FreeNode *domFreeList;
public unsafe FreeNode *domSaveList;
public bool isSubMemConnected;
}
private static SubMemoryMap [] subMemoryMap;
private static ProcessorMemoryMap [] processorMemoryMap;
private static DomainMap [] domainMap;
private static bool isProcessorMemoryInitialized;
//////////////////////////////////////////////////////////////////
//
// haryadi: MP FlatPages routines start here.
private static unsafe void PrintSubMemoryMap()
{
DebugStub.WriteLine("\n\n SUB MEMORY MAP");
DebugStub.WriteLine(" --------------------------------------------");
for (int i = 0; i < subMemoryMap.Length; i++) {
DebugStub.WriteLine(" [m{0}] b.{1:x8} e.{2:x8} l.{3:x8} d.{4} i.{5}",
__arglist(subMemoryMap[i].memoryId,
subMemoryMap[i].baseAddr,
subMemoryMap[i].endAddr,
subMemoryMap[i].length,
subMemoryMap[i].domain,
subMemoryMap[i].isValid));
}
DebugStub.WriteLine();
}
private static unsafe void PrintProcessorMemoryMap()
{
DebugStub.WriteLine("\n\n PROCESSOR MEMORY MAP");
DebugStub.WriteLine(" --------------------------------------------");
for (int i = 0; i < processorMemoryMap.Length; i++) {
DebugStub.WriteLine(" [p{0}] b.{1:x8} e.{2:x8} l.{3:x8} d.{4} f.{5:x8} s.{6:x8} i.{7:x8} ",
__arglist(processorMemoryMap[i].processorId,
processorMemoryMap[i].baseAddr,
processorMemoryMap[i].endAddr,
processorMemoryMap[i].length,
processorMemoryMap[i].domain,
(UIntPtr)processorMemoryMap[i].procFreeList,
(UIntPtr)processorMemoryMap[i].procSaveList,
processorMemoryMap[i].isInitialized));
}
DebugStub.WriteLine();
}
private static unsafe void PrintDomainMap()
{
DebugStub.WriteLine("\n\n DOMAIN MAP");
DebugStub.WriteLine(" --------------------------------------------");
for (int i = 0; i < domainMap.Length; i++) {
DebugStub.Print(" [d{0}] ts.{1:x8} dl.{2:x8}",
__arglist(i, domainMap[i].totalMemSize, (UIntPtr)domainMap[i].domFreeList));
for (int j = 0; j < domainMap[i].processors.Length; j++) {
DebugStub.Print(" (p{0},{1:x8}) ", __arglist(domainMap[i].processors[j].processorId,
domainMap[i].processors[j].baseAddr));
}
for (int j = 0; j < domainMap[i].subMemories.Length; j++) {
DebugStub.Print(" (m{0},{1:x8}) ", __arglist(domainMap[i].subMemories[j].memoryId,
domainMap[i].subMemories[j].baseAddr));
}
DebugStub.WriteLine();
}
DebugStub.WriteLine();
}
private static unsafe void PrintAllMaps()
{
DebugStub.WriteLine("\n\n **** PRINT ALL MAPS ****");
PrintSubMemoryMap();
PrintProcessorMemoryMap();
PrintDomainMap();
DebugStub.WriteLine();
}
// Create manually simple SubMemoryMap
private static unsafe void PrepareSubMemoryMapSimpleTest()
{
int memoryCount = 5;
subMemoryMap = new SubMemoryMap [memoryCount];
fixed (SubMemoryMap *s = &(subMemoryMap[0])) {
s->memoryId = 0;
s->baseAddr = 0x0;
s->endAddr = 0x000a0000; // 640 KB
s->length = s->endAddr - s->baseAddr;
s->domain = 0;
s->isValid = false;
}
fixed (SubMemoryMap *s = &(subMemoryMap[1])) {
s->memoryId = 1;
s->baseAddr = 0x01000000; // 16 MB
s->endAddr = 0x20000000; // 512 MB
s->length = s->endAddr - s->baseAddr;
s->domain = 0;
s->isValid = false;
}
fixed (SubMemoryMap *s = &(subMemoryMap[2])) {
s->memoryId = 2;
s->baseAddr = 0x20000000; // 512 MB
s->endAddr = 0x40000000; // 1 GB
s->length = s->endAddr - s->baseAddr;
s->domain = 1;
s->isValid = false;
}
fixed (SubMemoryMap *s = &(subMemoryMap[3])) {
s->memoryId = 3;
s->baseAddr = 0x40000000; // 1 GB
s->endAddr = 0x60000000; // 1.5 GB
s->length = s->endAddr - s->baseAddr;
s->domain = 0;
s->isValid = false;
}
fixed (SubMemoryMap *s = &(subMemoryMap[4])) {
s->memoryId = 4;
s->baseAddr = 0x60000000; // 1.5 GB
s->endAddr = 0x80000000; // 2 GB
s->length = s->endAddr - s->baseAddr;
s->domain = 1;
s->isValid = false;
}
}
// Create manually complex SubMemoryMap.
// Current complexTest: 3 domains, 12 processors, 9 memories
// 1 G: 0x4000_0000
// 2 G: 0x8000_0000
private static unsafe void PrepareSubMemoryMapComplexTest()
{
int memoryCount = 9;
subMemoryMap = new SubMemoryMap [memoryCount];
uint domain = 0;
UIntPtr cur = 0;
UIntPtr length = 0x04000000;
for (int i = 0; i < memoryCount; i++) {
fixed (SubMemoryMap *s = &(subMemoryMap[i])) {
s->memoryId = i;
s->baseAddr = cur;
s->endAddr = cur+length;
s->length = s->endAddr - s->baseAddr;
s->domain = domain;
s->isValid = false;
// the last one eat up everything
/*
if (i == memoryCount - 1) {
s->baseAddr = cur;
s->endAddr = 0x80000000;
s->length = s->endAddr - s->baseAddr;
}*/
}
cur += length;
// flip domain, so that we have non-contiguous memory
if (domain == 0) {
domain = 1;
}
else if (domain == 1){
domain = 2;
}
else {
domain = 0;
}
}
}
private static unsafe void PrepareSubMemoryMap()
{
// get memory banks
IHalMemory.MemoryAffinity[] memories =
Processor.GetMemoryAffinity();
int memoryCount = memories.Length;
subMemoryMap = new SubMemoryMap [memoryCount];
for (int i = 0; i < subMemoryMap.Length; i++) {
subMemoryMap[i].memoryId = i;
subMemoryMap[i].baseAddr = memories[i].baseAddress;
subMemoryMap[i].endAddr = memories[i].endAddress;
subMemoryMap[i].length = memories[i].memorySize;
subMemoryMap[i].domain = memories[i].domain;
subMemoryMap[i].isValid = false;
}
}
// If we don't have SRAT table, then we treat the whole memory
// as 1 subMemoryMap. Since, we don't break the memory, so
// isValid is set to true
private static unsafe void PrepareSubMemoryMapNoAffinity()
{
subMemoryMap = new SubMemoryMap[1];
subMemoryMap[0].memoryId = 0;
subMemoryMap[0].baseAddr = 0x0;
subMemoryMap[0].endAddr = GetMaxMemory();
subMemoryMap[0].length = GetMaxMemory();
subMemoryMap[0].domain = 0;
subMemoryMap[0].isValid = true;
}
// Based on the SRAT table, we try to break original free list
// into multiple free nodes. The rule is we break at the start
// address of every sub memory map
private static unsafe void CreateSubMemoryMap()
{
for (int mNum = 0; mNum < subMemoryMap.Length; mNum++) {
subMemoryMap[mNum].isValid =
CreateSubMemory(mNum,
subMemoryMap[mNum].baseAddr,
subMemoryMap[mNum].endAddr);
if (!subMemoryMap[mNum].isValid) {
#if MP_VERBOSE
DebugStub.WriteLine
(" WARNING: SubMap-{0} [{1:x8}..{2:x8}] cannot be initialized",
__arglist(mNum,
subMemoryMap[mNum].baseAddr,
subMemoryMap[mNum].endAddr));
#endif
}
}
}
// First, given the base address, we find the free node
// (curNode) that will be cut by the base address. In other
// words, the curNode is the node that will be broken to 2
// parts. If we could not find it, then curNode is null.
// Second, we need to check if the memory area from
// memBaseAddr to memEndAddr is intersecting with any free
// node. (See more detailed comment in IsPartialIntersect()
// function). IsPartialIntersect will give the new breakAddr.
// The corresponding subMemoryMap's base address also must be
// updated with the new breakAddr. If the two conditions
// above fail. Then this subMemory cannot be initialized.
private static unsafe bool CreateSubMemory(int memoryNumber,
UIntPtr memBaseAddr,
UIntPtr memEndAddr)
{
// always break at the memBaseAddr
UIntPtr breakAddr = memBaseAddr;
#if MP_VERBOSE
DebugStub.WriteLine("\n SubMap[{0}]: Creating at {1:x8}",
__arglist(memoryNumber,breakAddr));
#endif
FreeNode* curNode = FreeNode.GetFreeNodeAtBreakAddr(freeList, breakAddr);
if (curNode == null) {
// now check just in case the bottom part of this
// subMem is intersect with one of the free list node
breakAddr = FreeNode.IsPartialIntersect(freeList, memBaseAddr, memEndAddr);
curNode = FreeNode.GetFreeNodeAtBreakAddr(freeList, breakAddr);
if (curNode == null) {
return false;
}
// update base address
if (breakAddr != 0) {
subMemoryMap[memoryNumber].baseAddr = breakAddr;
}
}
#if MP_VERBOSE
DebugStub.WriteLine(" SubMap[{0}]: braking list at {1.x8}",
__arglist(memoryNumber, breakAddr));
#endif
FreeNode.BreakListAt(freeList, curNode, breakAddr);
return true;
}
private static unsafe void PrepareProcessorMemoryMapNoAffinity()
{
int processorCount = Processor.GetProcessorCount();
processorMemoryMap = new ProcessorMemoryMap [processorCount];
PrepareProcessorMemoryMapCommonFields();
}
private static unsafe void PrepareProcessorMemoryMap()
{
IHalMemory.ProcessorAffinity [] halProcessors =
Processor.GetProcessorAffinity();
int processorCount = halProcessors.Length;
processorMemoryMap = new ProcessorMemoryMap [processorCount];
PrepareProcessorMemoryMapCommonFields();
// update domain
for (int i = 0; i < processorCount; i++) {
processorMemoryMap[i].domain = halProcessors[i].domain;
}
}
private static unsafe void PrepareProcessorMemoryMapCommonFields()
{
for (int i=0; i < processorMemoryMap.Length; i++) {
processorMemoryMap[i].domain = 0;
processorMemoryMap[i].processorId = i;
processorMemoryMap[i].baseAddr = 0x0;
processorMemoryMap[i].endAddr = 0x0;
processorMemoryMap[i].length = 0x0;
// Initialize the free and save lists.
fixed (FreeNode *tail = &(processorMemoryMap[i].procFreeListTail)) {
processorMemoryMap[i].procFreeList = tail;
FreeNode.Init(processorMemoryMap[i].procFreeList, false);
}
fixed (FreeNode *tail = &(processorMemoryMap[i].procSaveListTail)) {
processorMemoryMap[i].procSaveList = tail;
FreeNode.Init(processorMemoryMap[i].procSaveList, true);
}
}
}
private static unsafe void PrepareProcessorMemoryMapComplexTest()
{
int processorCount = 12;
uint domain = 0;
processorMemoryMap = new ProcessorMemoryMap [processorCount];
for (int i=0; i < processorCount; i++) {
if (i == 4) {
domain++;
}
if (i == 8) {
domain++;
}
processorMemoryMap[i].domain = domain;
processorMemoryMap[i].processorId = i;
processorMemoryMap[i].baseAddr = 0x0;
processorMemoryMap[i].endAddr = 0x0;
processorMemoryMap[i].length = 0x0;
// Initialize the free and save lists.
fixed (FreeNode *tail = &(processorMemoryMap[i].procFreeListTail)) {
processorMemoryMap[i].procFreeList = tail;
FreeNode.Init(processorMemoryMap[i].procFreeList, false);
}
fixed (FreeNode *tail = &(processorMemoryMap[i].procSaveListTail)) {
processorMemoryMap[i].procSaveList = tail;
FreeNode.Init(processorMemoryMap[i].procSaveList, true);
}
}
}
private static unsafe void PrepareDomainMapCommonFields()
{
for (int i = 0; i < domainMap.Length; i ++) {
domainMap[i].domain = (uint)i;
domainMap[i].isSubMemConnected = false;
// Initialize the free and save lists.
fixed (FreeNode *tail = &(domainMap[i].domFreeListTail)) {
domainMap[i].domFreeList = tail;
FreeNode.Init(domainMap[i].domFreeList, false);
}
fixed (FreeNode *tail = &(domainMap[i].domSaveListTail)) {
domainMap[i].domSaveList = tail;
FreeNode.Init(domainMap[i].domSaveList, true);
}
}
}
// Just attach processors and memories if we don't have SRAT table
private static unsafe void PrepareDomainMapNoAffinity()
{
domainMap = new DomainMap [1];
PrepareDomainMapCommonFields();
domainMap[0].processors = processorMemoryMap;
domainMap[0].subMemories = subMemoryMap;
domainMap[0].totalMemSize = 0;
for (int i = 0; i < subMemoryMap.Length; i++) {
domainMap[0].totalMemSize += subMemoryMap[i].length;
}
}
// Per Domain: Traverse the processor and memory maps, and put
// then in domainMap according to their domain numbers
private static unsafe void PrepareDomainMap(int domainCount)
{
int count;
domainMap = new DomainMap [domainCount];
PrepareDomainMapCommonFields();
for (int i = 0; i < domainCount; i ++) {
domainMap[i].totalMemSize = 0;
// processor, 1st pass, count
count = 0;
for (int j = 0; j < processorMemoryMap.Length; j++) {
if (processorMemoryMap[j].domain == domainMap[i].domain) {
count++;
}
}
domainMap[i].processors = new ProcessorMemoryMap[count];
// processor, 2nd pass, count
count = 0;
for (int j = 0; j < processorMemoryMap.Length; j++) {
if (processorMemoryMap[j].domain == domainMap[i].domain) {
domainMap[i].processors[count] = processorMemoryMap[j];
count++;
}
}
// sub, 1st pass, count
count = 0;
for (int j = 0; j < subMemoryMap.Length; j++) {
if (subMemoryMap[j].domain == domainMap[i].domain) {
count++;
}
}
domainMap[i].subMemories = new SubMemoryMap[count];
// sub, 2nd pass, count
count = 0;
for (int j = 0; j < subMemoryMap.Length; j++) {
if (subMemoryMap[j].domain == domainMap[i].domain) {
domainMap[i].subMemories[count] = subMemoryMap[j];
domainMap[i].totalMemSize += subMemoryMap[j].length;
count++;
}
}
}
}
// Basically, this function grab the original free list and
// and attach it to the domain tail free list. After this
// function is called, we should no longer use the original
// free list
private static unsafe void ConnectSubMemoriesPerDomainNoAffinity()
{
FreeNode *dom = domainMap[0].domFreeList;
FreeNode *first = freeList->next;
FreeNode *last = freeList->prev;
dom->next = first;
dom->prev = last;
first->prev = dom;
first->next = dom;
domainMap[0].isSubMemConnected = true;;
#if MP_VERBOSE
DebugStub.WriteLine("\n\n Connect memory no affinity: ");
DebugStub.WriteLine(" dl.{0:x8} dn.{1:x8} dp.{2:x8}",
__arglist((UIntPtr)dom,
(UIntPtr)dom->next,
(UIntPtr)dom->prev));
DebugStub.WriteLine(" ff.{0:x8} fn.{1:x8} fp.{2:x8}",
__arglist((UIntPtr)first,
(UIntPtr)first->next,
(UIntPtr)first->prev));
DebugStub.WriteLine(" ll.{0:x8} ln.{1:x8} lp.{2:x8}",
__arglist((UIntPtr)last,
(UIntPtr)last->next,
(UIntPtr)last->prev));
#endif
}
private static unsafe void ConnectSubMemoriesPerDomain()
{
for (int i = 0; i < domainMap.Length; i++) {
#if MP_VERBOSE
DebugStub.WriteLine("\n Domain [{0}]:", __arglist(i));
#endif
ConnectSubMemoriesInDomain(domainMap[i]);
domainMap[i].isSubMemConnected = true;
}
}
// At this point, the original free list should have been
// partitioned according to the subMemoryMap. Now, we attach
// the sub memory maps to their corresponding domain free
// list. After this function is called, we should no longer
// use the original free list
private static unsafe void ConnectSubMemoriesInDomain(DomainMap dMap)
{
if (dMap.subMemories.Length == 0) {
DebugStub.WriteLine("\n\n **** ERROR, one of the domain does not have memory ****");
DebugStub.WriteLine("\n\n **** this is not currently supported ****");
DebugStub.Break();
}
#if MP_VERBOSE
DebugStub.WriteLine("\n Connection SubMemories in Domain {0}:",
__arglist(dMap.domain));
DebugStub.WriteLine(" -----------------------------------------------");
#endif
FreeNode *domTailNode = dMap.domFreeList;
FreeNode *curNode;
FreeNode *prevNode = null;
int validMem = 0;
int validMemCount = 0;
#if MP_VERBOSE
DebugStub.WriteLine(" Checking valid memory map:");
#endif
for (int i = 0; i < dMap.subMemories.Length; i++) {
if (dMap.subMemories[i].isValid) {
#if MP_VERBOSE
DebugStub.WriteLine(" Valid: sm{0} smb.{1:x8} sme.{2:x8}",
__arglist(i,
dMap.subMemories[i].baseAddr,
dMap.subMemories[i].endAddr));
#endif
validMemCount++;
}
}
#if MP_VERBOSE
DebugStub.WriteLine("\n Connecting sub memories:");
#endif
for (int i = 0; i < dMap.subMemories.Length; i++) {
// if not valid continue
if (!dMap.subMemories[i].isValid) {
continue;
}
// this is wrong
curNode = (FreeNode*) dMap.subMemories[i].baseAddr;
#if MP_VERBOSE
DebugStub.WriteLine("\n [{0}]. curNode is at [base.{1:x8}]",
__arglist(validMem, (UIntPtr)curNode));
#endif
// if this is the first valid memory, update the head
// of the linked list
if (validMem == 0) {
domTailNode->next = curNode;
curNode->prev = domTailNode;
#if MP_VERBOSE
DebugStub.WriteLine(" [{0}]. [d.{1:x8}] dn.{2:x8} = c.{3:x8}",
__arglist(validMem,
(UIntPtr)domTailNode,
(UIntPtr)domTailNode->next,
(UIntPtr)curNode));
DebugStub.WriteLine(" [{0}]. [c.{1:x8}] cp.{2:x8} = d.{3:x8}",
__arglist(validMem,
(UIntPtr)curNode,
(UIntPtr)curNode->prev,
(UIntPtr)domTailNode));
#endif
}
// this is the last valid memory, update the tail of
// the linked list
if (validMem == validMemCount - 1) {
if (prevNode != null) {
prevNode->next = curNode;
curNode->prev = prevNode;
#if MP_VERBOSE
DebugStub.WriteLine(" [{0}]. [p.{1:x8}] pn.{2:x8} = c.{3:x8}",
__arglist(validMem,
(UIntPtr)prevNode,
(UIntPtr)prevNode->next,
(UIntPtr)curNode));
DebugStub.WriteLine(" [{0}]. [c.{1:x8}] cp.{2:x8} = p.{3:x8}",
__arglist(validMem,
(UIntPtr)curNode,
(UIntPtr)curNode->prev,
(UIntPtr)prevNode));
#endif
}
domTailNode->prev = curNode;
curNode->next = domTailNode;
#if MP_VERBOSE
DebugStub.WriteLine(" [{0}]. [d.{1:x8}] dp.{2:x8} = c.{3:x8}",
__arglist(validMem,
(UIntPtr)domTailNode,
(UIntPtr)domTailNode->prev,
(UIntPtr)curNode));
DebugStub.WriteLine(" [{0}]. [c.{1:x8}] cn.{2:x8} = d.{3:x8}",
__arglist(validMem,
(UIntPtr)curNode,
(UIntPtr)curNode->next,
(UIntPtr)domTailNode));
#endif
}
// else this is the middle
if (validMem > 0 && validMem < validMemCount - 1) {
prevNode->next = curNode;
curNode->prev = prevNode;
#if MP_VERBOSE
DebugStub.WriteLine(" [{0}]. [p.{1:x8}] pn.{2:x8} = c.{3:x8}",
__arglist(validMem,
(UIntPtr)prevNode,
(UIntPtr)prevNode->next,
(UIntPtr)curNode));
DebugStub.WriteLine(" [{0}]. [c.{1:x8}] cp.{2:x8} = p.{3:x8}",
__arglist(validMem,
(UIntPtr)curNode,
(UIntPtr)curNode->prev,
(UIntPtr)prevNode));
#endif
}
prevNode = curNode;
validMem++;
}
}
// Since, a processor might not have a contiguous memory, this
// function performs the conversion from the relativeAddr to th
// realAddr. For example if a processor has 20 bytes memory at
// mem[0..10] and mem[20..30], a relative address of mem[15] will
// be converted to the real address mem[25]
private static unsafe UIntPtr GetRealBaseAddrInDomainMap(DomainMap dMap, UIntPtr relativeAddr)
{
for (int i = 0; i < dMap.subMemories.Length; i++) {
// We should not take into account subMemories
// that are not valid. Remember that the first
// subMemory usually can not be created because that
// part of the memory is not in the original free list
if (!dMap.subMemories[i].isValid) {
continue;
}
if (relativeAddr < dMap.subMemories[i].length) {
return (dMap.subMemories[i].baseAddr + relativeAddr);
}
relativeAddr = relativeAddr - dMap.subMemories[i].length;
}
DebugStub.WriteLine("\n\n **** ERROR relativeAddr.{0:x8} is to big??, overflow ****",
__arglist(relativeAddr));
DebugStub.Break();
return 0;
}
// Convert relative end addr
private static unsafe UIntPtr GetRealEndAddrInDomainMap (DomainMap dMap, UIntPtr relativeAddr)
{
for (int i = 0; i < dMap.subMemories.Length; i++) {
if (!dMap.subMemories[i].isValid) {
continue;
}
if (relativeAddr <= dMap.subMemories[i].length) {
return (dMap.subMemories[i].baseAddr + relativeAddr);
}
relativeAddr = relativeAddr - dMap.subMemories[i].length;
}
DebugStub.WriteLine("\n\n **** ERROR relativeAddr.{0:x8} is to big??, overflow ****",
__arglist(relativeAddr));
DebugStub.Break();
return 0;
}
// This is for rounding. Consider 1 memory, and 3 processors.
// If first two processor get 0.33 of the whole memories, the
// last one gets 0.34.
private static unsafe UIntPtr GetLastAddrInDomainMap (DomainMap dMap)
{
return dMap.subMemories[dMap.subMemories.Length - 1].endAddr;
}
// For each Domain dMap, we will partitioned the memories in this
// domain across the processors in the same domain.
private static unsafe void CreatePerProcessorMemoryInDomain(DomainMap dMap)
{
int processorCount = dMap.processors.Length;
UIntPtr pageCount = dMap.totalMemSize >> MemoryManager.PageBits;
UIntPtr pagePerProcessor =
(UIntPtr)((ulong)pageCount / (ulong)processorCount);
UIntPtr curPage = 0;
FreeNode *curNode;
UIntPtr breakAddr;
#if MP_VERBOSE
DebugStub.WriteLine("\n\n Creating Domain [{0}]",
__arglist(dMap.domain));
DebugStub.WriteLine(" ---------------------------------------");
DebugStub.WriteLine(" Total MemSize : {0:x8}",
__arglist(dMap.totalMemSize));
DebugStub.WriteLine(" Page Count : {0}",
__arglist(pageCount));
DebugStub.WriteLine(" Processor Cnt : {0}",
__arglist(processorCount));
DebugStub.WriteLine(" Page/Proc : {0}",
__arglist(pagePerProcessor));
DebugStub.WriteLine(" DomFreeList : {0:x8}",
__arglist((UIntPtr)dMap.domFreeList));
#endif
for (int i = 0; i < processorCount; i++) {
#if MP_VERBOSE
DebugStub.WriteLine("\n\n PROCESSOR-{0}", __arglist(i));
DebugStub.WriteLine(" -------------------------------");
#endif
dMap.processors[i].baseAddr =
GetRealBaseAddrInDomainMap(dMap,
curPage <<
MemoryManager.PageBits);
#if MP_VERBOSE
DebugStub.WriteLine(" GetRealAddr: curPage,{0} --> baseAddr.{1:x8}",
__arglist(curPage,
dMap.processors[i].baseAddr));
#endif
// if last processor, take all what is left
if (i == processorCount - 1) {
dMap.processors[i].endAddr = GetLastAddrInDomainMap(dMap);
// is not necessary contiguous
dMap.processors[i].length =
(pageCount - curPage) << MemoryManager.PageBits;
#if MP_VERBOSE
DebugStub.WriteLine(" LastProcessor in Domain gets all");
#endif
}
else {
dMap.processors[i].endAddr =
GetRealEndAddrInDomainMap(dMap,
(curPage + pagePerProcessor)
<< MemoryManager.PageBits);
// is not necessary contiguous
dMap.processors[i].length =
(pagePerProcessor << MemoryManager.PageBits);
}
#if MP_VERBOSE
DebugStub.WriteLine(" GetEndAddr : curPage.{0} --> endAddr.{1:x8}, length.{2:x8}",
__arglist(curPage,
dMap.processors[i].endAddr,
dMap.processors[i].length));
#endif
// now, let's break at the start addr
breakAddr = dMap.processors[i].baseAddr;
curNode = FreeNode.GetFreeNodeAtBreakAddr(dMap.domFreeList, breakAddr);
if (curNode != null) {
#if MP_VERBOSE
DebugStub.WriteLine(" Breaking at StartAddr.{0:x8}",
__arglist(breakAddr));
DebugStub.WriteLine(" curNode found around StartAddr: node.{0:x8} prev.{1:x8} next.{2:x8}",
__arglist((UIntPtr)curNode,
(UIntPtr)curNode->prev,
(UIntPtr)curNode->next));
#endif
FreeNode.BreakListAt(dMap.domFreeList, curNode, breakAddr);
}
else {
#if MP_VERBOSE
DebugStub.WriteLine(" Breaking at StartAddr.{0:x8} -- cancelled, can't find freeNode",
__arglist(breakAddr));
#endif
}
// don't forget to add current page
curPage += pagePerProcessor;
#if MP_VERBOSE
DebugStub.WriteLine(" Processor[{0}] initialized at base.{0:x8} end.{1:x8} length.{2:x8}",
__arglist(dMap.processors[i].baseAddr,
dMap.processors[i].endAddr,
dMap.processors[i].length));
#endif
}
}
// Note that this function only performs computation. I.e.
// it calculates the memory ranges that a process will be given.
// It does not steal the free list yet.
private static unsafe void CreatePerProcessorMemory()
{
for (int i = 0; i < domainMap.Length; i++) {
CreatePerProcessorMemoryInDomain(domainMap[i]);
}
}
// just copy back some fields, because domainMap.processors and
// processorMemoryMap do not point to the same object?????
private static unsafe void CopyDomainProcessorsToProcessors()
{
for (int i = 0; i < processorMemoryMap.Length; i++) {
for (int j = 0; j < domainMap.Length; j++) {
for (int k = 0; k < domainMap[j].processors.Length; k++) {
// same, copy
if (processorMemoryMap[i].processorId ==
domainMap[j].processors[k].processorId) {
processorMemoryMap[i].domain =
domainMap[j].processors[k].domain;
processorMemoryMap[i].baseAddr =
domainMap[j].processors[k].baseAddr;
processorMemoryMap[i].endAddr =
domainMap[j].processors[k].endAddr;
processorMemoryMap[i].length =
domainMap[j].processors[k].length;
}
}
}
}
}
// Get lowest free node from all domains
private static unsafe FreeNode* GetLowestNodeFromDomains()
{
// how about in 64 bits architecture??
UIntPtr lowest = (UIntPtr) 0xffffffff;
FreeNode *tail = null;
FreeNode *first = null;
for (int i = 0; i < domainMap.Length; i++) {
tail = domainMap[i].domFreeList;
first = tail->next;
// need to check if tail == first, then we have problem:
// there is no free list!!
if (tail == first) {
DebugStub.WriteLine("\n\n****** ERROR ******");
DebugStub.WriteLine("GetLow: Domain [{0}] has no free list at tail {1:x8}",
__arglist(i,(UIntPtr)tail));
DebugStub.Break();
}
if ((UIntPtr)first < lowest) {
lowest = (UIntPtr)first;
}
}
return (FreeNode*)lowest;
}
// Get highest node from all domains
private static unsafe FreeNode* GetHighestNodeFromDomains()
{
UIntPtr highest = (UIntPtr) 0x0;
FreeNode *tail = null;
FreeNode *last = null;
for (int i = 0; i < domainMap.Length; i++) {
tail = domainMap[i].domFreeList;
last = tail->prev;
if (tail == last) {
DebugStub.WriteLine("\n\n****** ERROR ******");
DebugStub.WriteLine("GetHigh: Domain [{0}] has no free list at tail {1:x8}",
__arglist(i,(UIntPtr)tail));
DebugStub.Break();
}
if ((UIntPtr)last > highest) {
highest = (UIntPtr)last;
}
}
return (FreeNode*)highest;
}
// At this point, each processor should know the baseAddr of
// the memory ranges that it should have. Now, we need to
// partitioned the domain's free lists for the processors in
// the domain. This is a similar operation that we did when
// we partition the original free list to sub-memories. The
// way we break it here, is we will break the free list at
// each processor's baseAddr. After we break the domain's free
// list, we steal the free list and attach it to the
// corresponding processors' free list.
private static unsafe void AttachPerProcessorMemoryToFreeListTail()
{
FreeNode *procTailNode;
FreeNode *firstNode;
LastNode *last;
FreeNode *lastNode;
FreeNode *prevNode = null;
for (int i = 0; i < processorMemoryMap.Length; i++) {
procTailNode = processorMemoryMap[i].procFreeList;
// Special case: The edges of the memory. i.e.
// memories of processor[0] and processor[lastProc]
if (i == 0) {
firstNode = GetLowestNodeFromDomains();
last = (LastNode*) (processorMemoryMap[i].endAddr - MemoryManager.PageSize);
lastNode = last->node;
}
else if (i == processorMemoryMap.Length - 1) {
firstNode = (FreeNode*) processorMemoryMap[i].baseAddr;
last = null;
lastNode = GetHighestNodeFromDomains();
}
else {
firstNode = (FreeNode*) processorMemoryMap[i].baseAddr;
last = (LastNode*) (processorMemoryMap[i].endAddr - MemoryManager.PageSize);
lastNode = last->node;
}
// if processor is the lowest
#if MP_VERBOSE
DebugStub.WriteLine();
DebugStub.WriteLine("\n Attaching Processor[{0}]", __arglist(i));
DebugStub.WriteLine(" -------------------------------------------");
DebugStub.WriteLine(" firstNode = {0:x8}", __arglist((UIntPtr)firstNode));
DebugStub.WriteLine(" last = {0:x8}", __arglist((UIntPtr)last));
DebugStub.WriteLine(" lastNode = {0:x8}", __arglist((UIntPtr)lastNode));
DebugStub.WriteLine(" procTailNode = {0:x8}", __arglist((UIntPtr)procTailNode));
DebugStub.WriteLine(" procTailNode = {0:x8}", __arglist((UIntPtr)procTailNode));
DebugStub.WriteLine("\n Before Attaching: \n");
if (last != null) {
DebugStub.WriteLine(" last a.{0:x8} n.{1:x8} ",
__arglist((UIntPtr)last, (UIntPtr)last->node));
}
DebugStub.WriteLine(" procTail a.{0:x8} p.{1:x8} n.{2:x8} l.{3:x8} ",
__arglist((UIntPtr)procTailNode, (UIntPtr)procTailNode->prev,
(UIntPtr)procTailNode->next, (UIntPtr)procTailNode->last));
DebugStub.WriteLine(" firstNode a.{0:x8} p.{1:x8} n.{2:x8} l.{3:x8} ",
__arglist((UIntPtr)firstNode, (UIntPtr)firstNode->prev,
(UIntPtr)firstNode->next, (UIntPtr)firstNode->last));
DebugStub.WriteLine(" lastNode a.{0:x8} p.{1:x8} n.{2:x8} l.{3:x8} ",
__arglist((UIntPtr)lastNode, (UIntPtr)lastNode->prev,
(UIntPtr)lastNode->next, (UIntPtr)lastNode->last));
#endif
// set heads
procTailNode->next = firstNode;
firstNode->prev = procTailNode;
// set tails
procTailNode->prev = lastNode;
lastNode->next = procTailNode;
processorMemoryMap[i].isInitialized = true;
#if MP_VERBOSE
DebugStub.WriteLine("\n After Attaching: \n");
if (last != null) {
DebugStub.WriteLine(" last a.{0:x8} n.{1:x8} ",
__arglist((UIntPtr)last, (UIntPtr)last->node));
}
DebugStub.WriteLine(" procTail a.{0:x8} p.{1:x8} n.{2:x8} l.{3:x8} ",
__arglist((UIntPtr)procTailNode, (UIntPtr)procTailNode->prev,
(UIntPtr)procTailNode->next, (UIntPtr)procTailNode->last));
DebugStub.WriteLine(" firstNode a.{0:x8} p.{1:x8} n.{2:x8} l.{3:x8} ",
__arglist((UIntPtr)firstNode, (UIntPtr)firstNode->prev,
(UIntPtr)firstNode->next, (UIntPtr)firstNode->last));
DebugStub.WriteLine(" lastNode a.{0:x8} p.{1:x8} n.{2:x8} l.{3:x8} ",
__arglist((UIntPtr)lastNode, (UIntPtr)lastNode->prev,
(UIntPtr)lastNode->next, (UIntPtr)lastNode->last));
#endif
}
}
private static unsafe void DebugMpPhase(int phase)
{
#if MP_VERBOSE
DebugStub.WriteLine("\n\n");
DebugStub.Print("PHASE {0}: ", __arglist(phase));
switch (phase) {
case 0:
DebugStub.WriteLine("MP FLAT-PAGES START");
break;
case 1:
FreeNode.PrintFreeList(freeList);
DebugStub.WriteLine("PREPARE SUB MEMORY MAP");
break;
case 2:
DebugStub.WriteLine("CREATE SUB MEMORY MAP");
break;
case 3:
PrintSubMemoryMap();
FreeNode.PrintFreeList(freeList);
DebugStub.WriteLine("PREPARE PROCESSOR MEM MAP");
break;
case 4:
PrintProcessorMemoryMap();
DebugStub.WriteLine("PREPARE DOMAIN MAPPING");
break;
case 5:
PrintDomainMap();
PrintSubMemoryMap();
DebugStub.WriteLine("CREATE SUB MEM PER DOMAIN:");
break;
case 6:
FreeNode.PrintDomainFreeLists();
DebugStub.WriteLine("CREATE PER PROC MEMORY"); break;
case 7:
FreeNode.PrintDomainFreeLists();
DebugStub.WriteLine("COPY DOMAIN TO PMAP");
break;
case 8:
PrintAllMaps();
DebugStub.WriteLine("ATTACH PROC FREE LIST");
break;
case 9:
PrintAllMaps();
FreeNode.PrintProcessorFreeLists();
DebugStub.WriteLine("MP FLAT-PAGES DONE"); break;
default: DebugStub.WriteLine(); break;
}
DebugStub.WriteLine("*************************************");
#endif
}
// At this point, all subMemories can be considered
// independent. Even though, they are all still
// full-linked under freeList we are going to break the
// links.
internal static unsafe void InitializeProcessorAddressSpace()
{
bool hasAffinityInfo = Processor.HasAffinityInfo();
DebugMpPhase(0);
#if COMPLEX_TEST
DebugMpPhase(1);
PrepareSubMemoryMapComplexTest();
DebugMpPhase(2);
CreateSubMemoryMap();
DebugMpPhase(3);
PrepareProcessorMemoryMapComplexTest();
DebugMpPhase(4);
PrepareDomainMap(3);
DebugMpPhase(5);
ConnectSubMemoriesPerDomain();
#else
if (!hasAffinityInfo) {
DebugMpPhase(1);
PrepareSubMemoryMapNoAffinity();
// skip Phase 2, since only has 1 sub memory
DebugMpPhase(3);
PrepareProcessorMemoryMapNoAffinity();
DebugMpPhase(4);
PrepareDomainMapNoAffinity();
DebugMpPhase(5);
ConnectSubMemoriesPerDomainNoAffinity();
}
else {
DebugMpPhase(1);
PrepareSubMemoryMap();
DebugMpPhase(2);
CreateSubMemoryMap();
DebugMpPhase(3);
PrepareProcessorMemoryMap();
DebugMpPhase(4);
PrepareDomainMap(Processor.GetDomainCount());
DebugMpPhase(5);
ConnectSubMemoriesPerDomain();
}
#endif
// At this point, domain is ready, then we can break the
// each domain's sub memories across the processors in the
// domain
DebugMpPhase(6);
CreatePerProcessorMemory();
DebugMpPhase(7);
CopyDomainProcessorsToProcessors();
DebugMpPhase(8);
AttachPerProcessorMemoryToFreeListTail();
// Reset back processor[0].baseAddr = 0. This is a hack for
// now, the top part of the memory is already gone during
// MP FlatPage initialization.
processorMemoryMap[0].length += processorMemoryMap[0].baseAddr;
processorMemoryMap[0].baseAddr = 0;
// Each Processor's memory is ready
isProcessorMemoryInitialized = true;
DebugMpPhase(9);
// Final check, dump to debugger
FreeNode.PrintProcessorsAddressSpaces();
}
internal static unsafe void Initialize()
{
Tracing.Log(Tracing.Debug, "FlatPages.Initialize() called");
InitializeLock();
BootInfo * bi = BootInfo.HalGetBootInfo();
isProcessorMemoryInitialized = false;
// First pass over SMAP, find the highest RAM address
SMAPINFO *smap = (SMAPINFO*)bi->SmapData32;
addressLimit = UIntPtr.Zero;
for (uint i = 0; i < bi->SmapCount; i++) {
if (smap[i].type == (ulong)SMAPINFO.AddressType.Free &&
smap[i].addr + smap[i].size > addressLimit) {
addressLimit = smap[i].addr + smap[i].size;
}
unchecked {
Tracing.Log(Tracing.Debug,
" [{0,8:x8}..{1,8:x8}] = {2,8:x8}",
(UIntPtr)(uint)smap[i].addr,
(UIntPtr)(uint)(smap[i].addr + smap[i].size),
(UIntPtr)(uint)smap[i].type);
}
}
pageCount = Pad((addressLimit >> MemoryManager.PageBits) + 1, MemoryManager.PageSize / sizeof(uint));
UIntPtr limit = Pad(bi->DumpLimit, 0x200000);
Tracing.Log(Tracing.Debug,
"Limit of RAM={0,8:x}, entries={1:x}, table={2:x}",
addressLimit, pageCount, limit);
// Create the page descriptor table.
pageTable = (uint *)limit;
// Initialize all page descriptors to Unknown.
SetPages(0, pageCount, MemoryManager.PageUnknown);
// Second pass over SMAP, mark known RAM.
for (uint i = 0; i < bi->SmapCount; i++) {
if (smap[i].type == (ulong)SMAPINFO.AddressType.Free) {
SetRange(smap[i].addr, smap[i].size, MemoryManager.PageFree);
}
}
// Record the page table memory.
SetRange(limit, pageCount * sizeof(uint), MemoryManager.KernelPageNonGC);
// Record the kernel memory.
SetRange(0x0, BootInfo.KERNEL_STACK_BEGIN, MemoryManager.KernelPageImage);
SetRange(bi->DumpBase, limit - bi->DumpBase, MemoryManager.KernelPageNonGC);
SetRange(BootInfo.KERNEL_STACK_BEGIN,
BootInfo.KERNEL_STACK_LIMIT - BootInfo.KERNEL_STACK_BEGIN,
MemoryManager.KernelPageStack);
// Note, normally filtered out by boot loader.
// SetRange(bi->DumpAddr32, bi->DumpAddr32 + bi->DumpSize32, MemoryManager.PageUnknown);
// Third pass over SMAP, mark hardware reserved memory as Unknown.
for (uint i = 0; i < bi->SmapCount; i++) {
if (smap[i].type != (ulong)SMAPINFO.AddressType.Free &&
smap[i].addr < addressLimit) {
SetRange(smap[i].addr, smap[i].size, MemoryManager.PageUnknown);
}
}
// Initialize the free and save lists.
fixed (FreeNode *tail = &freeListTail) {
freeList = tail;
FreeNode.Init(freeList, false);
}
fixed (FreeNode *tail = &saveListTail) {
saveList = tail;
FreeNode.Init(saveList, true);
}
uint *desc = pageTable;
uint last = *desc;
UIntPtr begin = UIntPtr.Zero;
for (UIntPtr i = UIntPtr.Zero; i < pageCount; i++) {
uint val = *desc++ & MemoryManager.SystemPageMask;
if (val != last) {
if (last == MemoryManager.PageFree) {
FreeNode.CreateAndInsert(freeList,
AddrFromPage(begin),
AddrFromPage(i - begin));
}
begin = i;
last = val;
}
}
Dump("Initialized");
#if TEST
UIntPtr l1 = RawAllocateBelow(0x1000000, 0x20000, 0x20000, 0x88810000u);
UIntPtr l2 = RawAllocateBelow(0x1000000, 0x10000, 0x20000, 0x88820000u);
UIntPtr l3 = RawAllocateBelow(0x1000000, 0x20000, 0x20000, 0x88830000u);
UIntPtr l4 = RawAllocateBelow(0x1000000, 0x10000, 0x20000, 0x88840000u);
UIntPtr a1 = RawAllocate( 0x1000, 0x100000, 0x4000, 0x99910000u);
UIntPtr a2 = RawAllocate( 0x10000, 0x100000, 0x4000, 0x99920000u);
UIntPtr a3 = RawAllocate(0x100000, 0x100000, 0x4000, 0x99930000u);
UIntPtr a4 = RawAllocate( 0x1000, 0x10000, 0x4000, 0x99940000u);
UIntPtr a5 = RawAllocate( 0x1000, 0x10000, 0x4000, 0x99950000u);
Dump("Base Allocations");
UIntPtr a1a = a1 != UIntPtr.Zero
? RawAllocateExtend(a1 + 0x1000, 0xf000, 0x99910001u) : UIntPtr.Zero;
UIntPtr a2a = a2 != UIntPtr.Zero
? RawAllocateExtend(a2 + 0x10000, 0x10000, 0x99920001u) : UIntPtr.Zero;
UIntPtr a4a = a4 != UIntPtr.Zero
? RawAllocateExtend(a4 + 0x1000, 0xf000, 0x99940001u) : UIntPtr.Zero;
Dump("Extend Allocations");
Tracing.Log(Tracing.Debug, "Query Tests:");
DumpQuery(0);
DumpQuery(0x100000);
DumpQuery(0x200000);
DumpQuery(0x300000);
DumpQuery(bi->DumpBase + 0x1000);
DumpQuery(BootInfo.KERNEL_STACK_BEGIN + 0x1000);
DumpQuery(l1);
DumpQuery(l1 + 0x20000);
DumpQuery(l2);
DumpQuery(l2 + 0x20000);
DumpQuery(l3);
DumpQuery(l3 + 0x20000);
DumpQuery(l4);
DumpQuery(l4 + 0x20000);
DumpQuery(a1);
DumpQuery(a1 + 0x20000);
DumpQuery(a2);
DumpQuery(a2 + 0x20000);
DumpQuery(a3);
DumpQuery(a3 + 0x20000);
DumpQuery(a4);
DumpQuery(a4 + 0x20000);
DumpQuery(a5);
DumpQuery(a5 + 0x20000);
if (l1 != UIntPtr.Zero) {
RawFree(l1, 0x20000, 0x88810000u);
}
if (l3 != UIntPtr.Zero) {
RawFree(l3, 0x20000, 0x88830000u);
}
if (a1 != UIntPtr.Zero) {
RawFree(a1, 0x10000, 0x99910000u);
}
if (a3 != UIntPtr.Zero) {
RawFree(a3, 0x100000, 0x99930000u);
}
if (a5 != UIntPtr.Zero) {
RawFree(a5, 0x1000, 0x99950000u);
}
Dump("First Free");
if (l2 != UIntPtr.Zero) {
RawFree(l2, 0x10000, 0x88820000u);
}
if (l4 != UIntPtr.Zero) {
RawFree(l4, 0x10000, 0x88840000u);
}
if (a2 != UIntPtr.Zero) {
RawFree(a2, 0x20000, 0x99920000u);
}
if (a4 != UIntPtr.Zero) {
RawFree(a4, 0x10000, 0x99940000u);
}
Dump("Final Free");
DebugStub.Break();
DebugStub.Break();
DebugStub.Break();
#endif
}
internal static void Finalize()
{
// Doesn't actually do anything.
}
private static void InitializeLock()
{
#if SINGULARITY_MP
pageLock = new SpinLock();
#endif // SINGULARITY_MP
}
[NoStackLinkCheck]
private static bool Lock()
{
bool enabled = Processor.DisableInterrupts();
#if SINGULARITY_MP
pageLock.Acquire(Thread.CurrentThread);
#endif // SINGULARITY_MP
return enabled;
}
[NoStackLinkCheck]
private static void Unlock(bool iflag)
{
#if SINGULARITY_MP
pageLock.Release(Thread.CurrentThread);
#endif // SINGULARITY_MP
Processor.RestoreInterrupts(iflag);
}
// Currently, we just return the BSP free list. In the
// future, this should consult the ProcessorMemoryMap
private static unsafe FreeNode* GetFreeList()
{
if (isProcessorMemoryInitialized) {
return processorMemoryMap[0].procFreeList;
}
else {
return freeList;
}
}
private static unsafe FreeNode* GetSaveList()
{
if (isProcessorMemoryInitialized) {
return processorMemoryMap[0].procSaveList;
}
else {
return saveList;
}
}
//////////////////////////////////////////////////////////////////////
//
internal static UIntPtr PageCount
{
get { return pageCount; }
}
internal static unsafe uint * PageTable
{
get { return pageTable; }
}
[NoStackLinkCheck]
internal static UIntPtr Allocate(UIntPtr bytes,
UIntPtr reserve,
UIntPtr alignment,
Process process,
uint extra,
PageType type)
{
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(960);
#endif
UIntPtr got = new UIntPtr();
bool iflag = Lock();
try {
got = RawAllocate(bytes, reserve, alignment,
(process != null ? process.ProcessTag : MemoryManager.KernelPage)
| (extra & MemoryManager.ExtraMask)
| (uint)type);
#if VERBOSE
Tracing.Log(Tracing.Debug, "{0:x8} Allocate({1:x},{2:x},{3:x}",
Kernel.AddressOf(process), bytes, reserve,
alignment);
#endif
if (process != null) {
process.Allocated(bytes);
}
}
finally {
Unlock(iflag);
}
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(961);
#endif
return got;
}
internal static UIntPtr AllocateBelow(UIntPtr limit,
UIntPtr bytes,
UIntPtr alignment,
Process process,
uint extra,
PageType type)
{
UIntPtr got = new UIntPtr();
bool iflag = Lock();
try {
got = RawAllocateBelow(limit, bytes, alignment,
(process != null ? process.ProcessTag : MemoryManager.KernelPage)
| (extra & MemoryManager.ExtraMask)
| (uint)type);
if (process != null) {
process.Allocated(bytes);
}
}
finally {
Unlock(iflag);
}
return got;
}
internal static UIntPtr AllocateExtend(UIntPtr addr,
UIntPtr bytes,
Process process,
uint extra,
PageType type)
{
UIntPtr got = new UIntPtr();
bool iflag = Lock();
try {
uint tag =
(process != null ?
process.ProcessTag :
MemoryManager.KernelPage)
| (extra & MemoryManager.ExtraMask)
| (uint)type;
got = RawAllocateExtend(addr, bytes, tag);
if (got != UIntPtr.Zero && process != null) {
process.Allocated(bytes);
}
}
finally {
Unlock(iflag);
}
return got;
}
[NoStackLinkCheck]
internal static void Free(UIntPtr addr,
UIntPtr bytes,
Process process)
{
bool iflag = Lock();
try {
RawFree(addr, bytes, process != null ? process.ProcessTag : MemoryManager.KernelPage);
if (process != null) {
process.Freed(bytes);
}
}
finally {
Unlock(iflag);
}
}
internal static unsafe UIntPtr FreeAll(Process process)
{
DebugStub.Assert(process != null,
"FlatPages.FreeAll null process");
DebugStub.Assert(process.ProcessTag != MemoryManager.KernelPage,
"FlatPages.FreeAll ProcessTag={0}",
__arglist(process.ProcessTag));
uint tag = process.ProcessTag & MemoryManager.ProcessPageMask;
uint *pageLimit = pageTable + pageCount;
UIntPtr bytes = 0;
Tracing.Log(Tracing.Debug, "FreeAll({0,8:x})", tag);
for (uint *begin = pageTable; begin < pageLimit;) {
uint *limit = begin;
uint val = (*limit++) & MemoryManager.ProcessPageMask;
#if VERBOSE
unchecked {
Tracing.Log(Tracing.Debug, " {0,8:x}: {1,8:x}",
AddrFromPage((UIntPtr)(begin - pageTable)),
val);
}
#endif
if (val == tag) {
while ((((*limit) & MemoryManager.ProcessPageMask) == tag) && (limit < pageLimit)) {
limit++;
}
UIntPtr page = (UIntPtr)(begin - pageTable);
UIntPtr size = (UIntPtr)(limit - begin);
Tracing.Log(Tracing.Debug,
" {0,8:x}..{1,8:x} : {2,8:x} [will free]",
page << MemoryManager.PageBits, (page + size) << MemoryManager.PageBits,
*begin);
bool iflag = Lock();
try {
RawFree(AddrFromPage(page), AddrFromPage(size), tag);
}
finally {
Unlock(iflag);
}
bytes += size;
}
else {
while ((((*limit) & MemoryManager.ProcessPageMask) != tag) && (limit < pageLimit)) {
limit++;
}
UIntPtr page = (UIntPtr)(begin - pageTable);
UIntPtr size = (UIntPtr)(limit - begin);
Tracing.Log(Tracing.Debug,
"- {0,8:x}..{1,8:x} : {2,8:x} [will free]",
page << MemoryManager.PageBits, (page + size) << MemoryManager.PageBits,
*begin);
}
begin = limit;
}
if (process != null) {
process.Freed(bytes * MemoryManager.PageSize);
}
return bytes * MemoryManager.PageSize;
}
internal static PageType Query(UIntPtr queryAddr,
Process process,
out UIntPtr regionAddr,
out UIntPtr regionSize)
{
PageType type = new PageType();
bool iflag = Lock();
try {
type = RawQuery(queryAddr,
process != null ? process.ProcessTag : 0,
out regionAddr, out regionSize);
}
finally {
Unlock(iflag);
}
return type;
}
//////////////////////////////////////////////////////////////////////
//
[NoStackLinkCheck]
private static unsafe UIntPtr RawAllocate(UIntPtr bytes,
UIntPtr reserve,
UIntPtr alignment,
uint tag)
{
VTable.Assert(Processor.InterruptsDisabled());
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(970);
#endif
if (alignment < MemoryManager.PageSize)
{
alignment = MemoryManager.PageSize;
}
if (reserve < bytes) {
reserve = bytes;
}
#if VERBOSE
Tracing.Log(Tracing.Debug,
" size={0:x}, res={1:x}, aln={2:x}, tag={3:x}",
bytes, reserve, alignment, tag);
#endif
FreeNode * node = FreeNode.FindGoodFit(GetFreeList(), reserve, alignment);
if (node == null) {
node = FreeNode.FindGoodFit(GetFreeList(), bytes, alignment);
if (node == null) {
node = FreeNode.FindGoodFit(GetSaveList(), reserve, alignment);
if (node == null) {
node = FreeNode.FindGoodFit(GetSaveList(), bytes, alignment);
if (node == null) {
// We should try to combine free and save pages...
// But for now, we just fail.
return UIntPtr.Zero;
}
}
}
}
UIntPtr addr = (UIntPtr)node;
UIntPtr adjust = SpaceNotAligned(addr + node->bytes, alignment);
UIntPtr found = node->bytes;
#if VERBOSE
Tracing.Log(Tracing.Debug, " 0. {0:x8}..{1:x8}: res={2:x}, adj={3:x}",
addr, addr + found, reserve, adjust);
#endif
if (found > reserve + adjust) {
// Put the extraneous pages in the free list.
FreeNode.ReturnExtraBelow(GetFreeList(), ref addr, ref found, reserve + adjust);
#if VERBOSE
Tracing.Log(Tracing.Debug, " 1. {0:x8}..{1:x8}",
addr, addr + found);
#endif
}
#if ALLOW_BOOT_ARGLIST
DebugStub.Assert
(SpaceNotAligned(addr, alignment) == UIntPtr.Zero,
"FlatPages.RawAllocate not aligned addr={0} alignment={1}",
__arglist(addr, alignment));
#endif
if (found > bytes) {
// Put extra pages in the save list.
FreeNode.ReturnExtraAbove(GetSaveList(), addr, ref found, bytes);
#if VERBOSE
Tracing.Log(Tracing.Debug, " 2. {0:x8}..{1:x8}",
addr, addr + found);
#endif
}
#if ALLOW_BOOT_ARGLIST
DebugStub.Assert
(found == bytes,
"FlatPages.RawAllocate wrong amount found={0} bytes={1}",
__arglist(found, bytes));
#endif
SetRange(addr, found, tag);
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(971);
#endif
allocatedCount++;
allocatedBytes += (ulong)bytes;
return addr;
}
private static unsafe UIntPtr RawAllocateBelow(UIntPtr limit,
UIntPtr bytes,
UIntPtr alignment,
uint tag)
{
VTable.Assert(Processor.InterruptsDisabled());
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(972);
#endif
if (alignment < MemoryManager.PageSize)
{
alignment = MemoryManager.PageSize;
}
#if VERBOSE
Tracing.Log(Tracing.Debug,
"lim={0:x8}, size={1:x8}, align={2}, tag={3:x}",
limit, bytes, alignment, tag);
#endif
FreeNode * node = FreeNode.FindBelow(limit, GetFreeList(), bytes, alignment);
if (node == null) {
node = FreeNode.FindBelow(limit, GetSaveList(), bytes, alignment);
if (node == null) {
// We should try to combine free and save pages...
// But for now, we just fail.
return UIntPtr.Zero;
}
}
UIntPtr addr = (UIntPtr)node;
UIntPtr adjust = SpaceToAlign(addr, alignment);
UIntPtr found = node->bytes;
if (adjust != UIntPtr.Zero) {
// Put the alignment pages in free list.
FreeNode.ReturnExtraBelow(GetFreeList(), ref addr, ref found, found - adjust);
}
DebugStub.Assert
(SpaceNotAligned(addr, alignment) == UIntPtr.Zero,
"FlatPages.RawAllocateBelow not aligned addr={0} alignment={1}",
__arglist(addr, alignment));
if (found > bytes) {
// Put the extra pages in free list.
#if VERBOSE
Tracing.Log(Tracing.Debug,
"found {0:x8}..{1:x8}, found={3:x8}, keep={4:x8}",
addr, addr + found, found, bytes);
#endif
FreeNode.ReturnExtraAbove(GetFreeList(), addr, ref found, bytes);
}
DebugStub.Assert
(found == bytes,
"FlatPages.RawAllocateBelow wrong amount found={0} bytes={1}",
__arglist(found, bytes));
SetRange(addr, found, tag);
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(973);
#endif
allocatedCount++;
allocatedBytes += (ulong)bytes;
return addr;
}
private static unsafe UIntPtr RawAllocateExtend(UIntPtr addr,
UIntPtr bytes,
uint tag)
{
VTable.Assert(Processor.InterruptsDisabled());
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(974);
#endif
UIntPtr page = MemoryManager.PageFromAddr(addr);
if (*(pageTable + page) != MemoryManager.PageFreeFirst) {
Tracing.Log(Tracing.Error,
"{0:x} is not first free page {1:x}.",
addr, *(pageTable + page));
return UIntPtr.Zero;
}
FreeNode *node = (FreeNode *)addr;
if (node->bytes < bytes) {
Tracing.Log(Tracing.Error,
"Only {0:x} free bytes, not {1:x} as requested.",
node->bytes, bytes);
return UIntPtr.Zero;
}
#if VERBOSE
Tracing.Log(Tracing.Debug, "addr={0:x8}, size={1:x8}, tag={2:x}",
addr, bytes, tag);
#endif
// Remove the node from the list.
FreeNode.Remove(node);
UIntPtr found = node->bytes;
if (found > bytes) {
// Save the extra pages in the save list.
FreeNode.ReturnExtraAbove(GetSaveList(), addr, ref found, bytes);
}
DebugStub.Assert
(found == bytes,
"FlatPages.RawAllocateExtend wrong amount found={0} bytes{1}",
__arglist(found, bytes));
SetRange(addr, found, tag);
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(975);
#endif
allocatedCount++;
allocatedBytes += (ulong)bytes;
return addr;
}
[NoStackLinkCheck]
private static unsafe void VerifyOwner(UIntPtr page, UIntPtr pages, uint tag)
{
tag &= MemoryManager.ProcessPageMask;
for (UIntPtr i = UIntPtr.Zero; i < pages; i++) {
DebugStub.Assert
(((*(pageTable + page + i)) & MemoryManager.ProcessPageMask) == tag,
"FlatPages.VerifyOwner page={0} i={1} tag={2}",
__arglist(page, i, tag));
}
}
[NoStackLinkCheck]
private static unsafe void RawFree(UIntPtr addr, UIntPtr bytes, uint tag)
{
VTable.Assert(Processor.InterruptsDisabled());
UIntPtr bytesIn = bytes;
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(976);
#endif
#if VERBOSE
Tracing.Log(Tracing.Debug, "adr={0:x}, size={1:x}, tag={2:x}",
addr, bytes, tag);
#endif
VerifyOwner(MemoryManager.PageFromAddr(addr), MemoryManager.PagesFromBytes(bytes), tag);
FreeNode *node = FreeNode.GetNodeAt(addr + bytes);
FreeNode *prev = FreeNode.GetNodeFromLast(addr - MemoryManager.PageSize);
SetRange(addr, bytes, MemoryManager.PageFree);
// Try to combine with the previous region if it isn't a save region.
if (prev != null && prev->isSave == false) {
addr = (UIntPtr)prev;
bytes += prev->bytes;
FreeNode.Remove(prev);
}
// Try to combine with the next region even if it was a save region.
if (node != null) {
bytes += node->bytes;
FreeNode.Remove(node);
if (node->isSave) {
// If next was save, then try to combine with the follower.
node = FreeNode.GetNodeAt(addr + bytes);
if (node != null) {
bytes += node->bytes;
FreeNode.Remove(node);
}
}
}
// Create the free node.
FreeNode.CreateAndInsert(GetFreeList(), addr, bytes);
#if NO__TRACE_PAGES
#else
Kernel.Waypoint(977);
#endif
freedCount++;
freedBytes += (ulong)bytesIn;
}
private static unsafe PageType RawQuery(UIntPtr queryAddr,
uint tag,
out UIntPtr regionAddr,
out UIntPtr regionSize)
{
VTable.Assert(Processor.InterruptsDisabled());
UIntPtr page = MemoryManager.PageFromAddr(queryAddr);
UIntPtr startPage = page;
UIntPtr limitPage = page + 1;
PageType type;
uint val = *(pageTable + startPage);
bool used = ((val & MemoryManager.ProcessPageMask) != MemoryManager.SystemPage);
if ((val & MemoryManager.ProcessPageMask) == MemoryManager.SystemPage) {
// Found a system page.
type = (tag == 0) ? (PageType)(val & MemoryManager.TypeMask) : PageType.Unknown;
// Find the start of the SystemPage region.
for (; startPage > UIntPtr.Zero; startPage--) {
val = *(pageTable + startPage - 1);
if ((val & MemoryManager.ProcessPageMask) != MemoryManager.SystemPage) {
break;
}
}
// Find the end of the SystemPage region
for (; limitPage < pageCount; limitPage++) {
val = *(pageTable + limitPage);
if ((val & MemoryManager.ProcessPageMask) != MemoryManager.SystemPage) {
break;
}
}
}
else {
// Found a process page.
uint ptag = val & MemoryManager.ProcessPageMask;
type = (tag == 0 || ptag == tag)
? (PageType)(val & MemoryManager.TypeMask) : PageType.Unknown;
if ((val & MemoryManager.TypeMask) == (uint)PageType.System) {
// Find the start of the process code region.
for (; startPage > UIntPtr.Zero; startPage--) {
val = *(pageTable + startPage - 1);
if ((val & MemoryManager.ProcessPageMask) != ptag ||
(val & MemoryManager.TypeMask) != (uint)PageType.System) {
break;
}
}
// Find the end of the process code region
for (; limitPage < pageCount; limitPage++) {
val = *(pageTable + limitPage);
if ((val & MemoryManager.ProcessPageMask) != ptag ||
(val & MemoryManager.TypeMask) != (uint)PageType.System) {
break;
}
}
}
else {
// Find the start of the process region.
for (; startPage > UIntPtr.Zero; startPage--) {
val = *(pageTable + startPage - 1);
if ((val & MemoryManager.ProcessPageMask) != ptag ||
(val & MemoryManager.TypeMask) == (uint)PageType.System) {
break;
}
}
// Find the end of the process region
for (; limitPage < pageCount; limitPage++) {
val = *(pageTable + limitPage);
if ((val & MemoryManager.ProcessPageMask) != ptag ||
(val & MemoryManager.TypeMask) == (uint)PageType.System) {
break;
}
}
}
}
#if VERBOSE
Tracing.Log(Tracing.Debug, "[{0:x8}..{1:x8}]",
AddrFromPage(startPage), AddrFromPage(limitPage));
#endif
regionAddr = AddrFromPage(startPage);
regionSize = AddrFromPage(limitPage - startPage);
return type;
}
//////////////////////////////////////////////////////////////////////////
//
private static unsafe void DumpQuery(UIntPtr addr)
{
UIntPtr regionAddr;
UIntPtr regionSize;
PageType type = RawQuery(addr, 0, out regionAddr, out regionSize);
Tracing.Log(Tracing.Debug, " {0:x8} => {1:x8}..{2:x8} [{3:x}]",
addr, regionAddr, regionAddr + regionSize, (uint)type);
}
private static unsafe void DumpFreeNodes(FreeNode *list)
{
DumpFreeNodes(list, list->isSave);
}
private static unsafe void DumpFreeNodes(FreeNode *list, bool isSave)
{
if (isSave) {
Tracing.Log(Tracing.Debug, " SaveList:");
}
else {
Tracing.Log(Tracing.Debug, " FreeList:");
}
for (FreeNode *node = list->next; node != list; node = node->next) {
string fmt = " {0:x8}..{1:x8} prev={2:x8}, next={3:x8}, last={4:x8} ";
if (node->isSave != isSave) {
if (node->isSave) {
fmt = " {0:x8}..{1:x8} prev={2:x8}, next={3:x8}, last={4:x8} [Save!]";
}
else {
fmt = " {0:x8}..{1:x8} prev={2:x8}, next={3:x8}, last={4:x8} [Free!]";
}
}
unchecked {
Tracing.Log(Tracing.Debug, fmt,
(UIntPtr)node, (UIntPtr)node + node->bytes,
(UIntPtr)node->prev, (UIntPtr)node->next,
(UIntPtr)node->last);
}
}
}
internal static unsafe void Dump(string where)
{
Tracing.Log(Tracing.Debug, "FlatPages.Dump: {0}", where);
uint *descriptors = pageTable;
uint last = *descriptors++ & MemoryManager.SystemPageMask;
UIntPtr begin = UIntPtr.Zero;
UIntPtr freePages = UIntPtr.Zero;
UIntPtr usedPages = UIntPtr.Zero;
UIntPtr unknownPages = UIntPtr.Zero;
UIntPtr sharedPages = UIntPtr.Zero;
for (UIntPtr i = (UIntPtr)1; i < pageCount; i++) {
uint dsc = *descriptors++;
uint val = dsc & MemoryManager.SystemPageMask;
switch (val) {
case MemoryManager.PageUnknown:
unknownPages++;
break;
case MemoryManager.PageShared:
sharedPages++;
break;
case MemoryManager.PageFree:
freePages++;
break;
default:
usedPages++;
break;
}
if (dsc != last) {
Tracing.Log(Tracing.Debug, " {0:x8}..{1:x8} : {2:x8} : {3:x8}",
begin << MemoryManager.PageBits, i << MemoryManager.PageBits, last,
(i - begin) << MemoryManager.PageBits);
last = dsc;
begin = i;
}
}
Tracing.Log(Tracing.Debug, " {0:x8}..{1:x8} : {2:x8} : {3:x8}",
begin << MemoryManager.PageBits, pageCount << MemoryManager.PageBits, last,
(pageCount - begin) << MemoryManager.PageBits);
DumpFreeNodes(GetFreeList(), false);
DumpFreeNodes(GetSaveList(), true);
Tracing.Log(Tracing.Audit,
"Totals: free={0:x8}, used={1:x8}, unknown={2:x8}, reserved={3:x8}",
freePages << MemoryManager.PageBits,
usedPages << MemoryManager.PageBits,
unknownPages << MemoryManager.PageBits,
sharedPages << MemoryManager.PageBits);
}
//////////////////////////////////////////////////////////////////////
//
[NoStackLinkCheck]
private static unsafe void SetPages(UIntPtr startPage, UIntPtr pageCount, uint tag)
{
uint * descriptor = pageTable + startPage;
#if VERY_VERBOSE
Tracing.Log(Tracing.Audit,
"SetPages(beg={0:x},num={1:x},val={2}",
startPage << MemoryManager.PageBits,
pageCount << MemoryManager.PageBits,
tag);
#endif
while (pageCount > UIntPtr.Zero) {
*descriptor++ = tag;
pageCount--;
}
}
[NoStackLinkCheck]
private static void SetRange(UIntPtr start, UIntPtr bytes, uint tag)
{
if (start > addressLimit) {
return;
}
if (start + bytes > addressLimit) {
bytes = addressLimit - start;
}
SetPages(MemoryManager.PageFromAddr(start), MemoryManager.PagesFromBytes(bytes), tag);
}
//////////////////////////////////////////////////////////////////////////
//
public static UIntPtr GetMaxMemory()
{
return addressLimit;
}
public static unsafe UIntPtr GetFreeMemory()
{
uint *descriptors = pageTable;
UIntPtr retval = 0;
// Count free pages
for (UIntPtr i = (UIntPtr)1; i < pageCount; i++) {
uint dsc = *descriptors++;
uint val = dsc & MemoryManager.SystemPageMask;
if (val == MemoryManager.PageFree)
{
retval++;
}
}
return retval * MemoryManager.PageSize;
}
public static unsafe UIntPtr GetUsedMemory()
{
uint *descriptors = pageTable;
UIntPtr retval = 0;
// Count free pages
for (UIntPtr i = (UIntPtr)1; i < pageCount; i++) {
uint dsc = *descriptors++;
uint val = dsc & MemoryManager.SystemPageMask;
if (val != MemoryManager.PageFree)
{
retval++;
}
}
return retval * MemoryManager.PageSize;
}
public static void GetUsageStatistics(out ulong allocatedCount,
out ulong allocatedBytes,
out ulong freedCount,
out ulong freedBytes)
{
allocatedCount = FlatPages.allocatedCount;
allocatedBytes = FlatPages.allocatedBytes;
freedCount = FlatPages.freedCount;
freedBytes = FlatPages.freedBytes;
}
//////////////////////////////////////////////////////////////////////
//
[Inline]
internal static UIntPtr AddrFromPage(UIntPtr page) {
return (page << MemoryManager.PageBits);
}
[Inline]
private static UIntPtr Align(UIntPtr data, UIntPtr size)
{
return ((data) & ~(size - 1));
}
[Inline]
private static UIntPtr Pad(UIntPtr data, UIntPtr size)
{
return ((data + size - 1) & ~(size - 1));
}
[Inline]
private static UIntPtr SpaceToAlign(UIntPtr data, UIntPtr size)
{
return Pad(data, size) - data;
}
[Inline]
private static UIntPtr SpaceNotAligned(UIntPtr data, UIntPtr size)
{
return ((data) & (size - 1));
}
//////////////////////////////////////////////////////////////////////
//
[StructLayout(LayoutKind.Sequential)]
private struct LastNode
{
internal const uint Signature = 0xaa2222aa;
internal const uint Removed = 0xee1111ee;
internal uint signature;
internal unsafe FreeNode * node;
[NoStackLinkCheck]
internal static unsafe LastNode * Create(UIntPtr addr, FreeNode *node)
{
LastNode *last = (LastNode *)addr;
last->signature = LastNode.Signature;
last->node = node;
node->last = last;
#if VERBOSE
Tracing.Log(Tracing.Debug, "addr={0:x8}, node={1:x8}",
addr, (UIntPtr) last->node);
#endif
return last;
}
[NoStackLinkCheck]
internal static unsafe void Remove(LastNode *last)
{
last->signature = Removed;
last->node = null;
}
[NoStackLinkCheck]
internal static unsafe void PrintLastNode(UIntPtr addr)
{
LastNode *last = (LastNode *)addr;
DebugStub.WriteLine("ln.{1:x8} ", __arglist((UIntPtr)last->node));
}
}
//////////////////////////////////////////////////////////////////////
//
[StructLayout(LayoutKind.Sequential)]
private struct FreeNode
{
internal const uint Signature = 0x22aaaa22;
internal const uint Removed = 0x11eeee11;
internal uint signature;
internal unsafe FreeNode * prev;
internal unsafe FreeNode * next;
internal unsafe LastNode * last;
internal UIntPtr bytes;
internal bool isSave;
[NoStackLinkCheck]
internal static unsafe void Init(FreeNode *list, bool isSave)
{
list->signature = Signature;
list->prev = list;
list->next = list;
list->last = null;
list->bytes = 0;
list->isSave = isSave;
}
[NoStackLinkCheck]
internal static unsafe bool Remove(FreeNode *node)
{
FreeNode * prev;
FreeNode * next;
UIntPtr page = MemoryManager.PageFromAddr((UIntPtr)node);
*(pageTable + page) = MemoryManager.PageFree;
next = node->next;
prev = node->prev;
prev->next = next;
next->prev = prev;
if (node->last != null) {
LastNode.Remove(node->last);
}
node->signature = Removed;
return (next == prev);
}
[NoStackLinkCheck]
private static unsafe void InsertAsPrev(FreeNode *list, FreeNode *node)
{
FreeNode * prev;
prev = list->prev;
node->next = list;
node->prev = prev;
prev->next = node;
list->prev = node;
}
[NoStackLinkCheck]
private static unsafe void InsertAsNext(FreeNode *list, FreeNode *node)
{
FreeNode * next;
next = list->next;
node->prev = list;
node->next = next;
next->prev = node;
list->next = node;
}
[NoStackLinkCheck]
private static unsafe void InsertBySize(FreeNode *list, FreeNode *node)
{
#if ALLOW_BOOT_ARGLIST
DebugStub.Assert(node->bytes > 0,
"FlatPages.InsertBySize node->bytes={0}",
__arglist(node->bytes));
#endif
if (node->bytes <= SmallSize) {
// If the size is pretty small, we insert from the back of the list...
for (FreeNode *step = list->prev; step != list; step = step->prev) {
if (step->bytes >= node->bytes) {
InsertAsNext(step, node);
return;
}
}
InsertAsNext(list, node);
}
else {
// Insert a region into the list by size.
for (FreeNode *step = list; step->next != list; step = step->next) {
if (step->next->bytes <= node->bytes) {
InsertAsNext(step, node);
return;
}
}
InsertAsPrev(list, node);
}
}
///////////////////////////////////////////////////////////
// haryadi FreeNode's new routines start here
internal static unsafe void PrintFreeList(FreeNode *list)
{
int count = 0;
DebugStub.WriteLine
(" PRINT FREE LIST (tail.{0:x8} prev.{1:x8} next.{2:x8})",
__arglist((UIntPtr)(list),
(UIntPtr)list->prev,
(UIntPtr)list->next));
DebugStub.WriteLine(" ---------------------------------------------------");
for (FreeNode *node = list->next;
node != list; node = node->next) {
DebugStub.Print
(" [{0}] b.{1:x8} e.{2:x8} {3,8}KB p.{4:x8} n.{5:x8} l.{6:x8} -- ",
__arglist(
count,
(UIntPtr)node, (UIntPtr)node + node->bytes,
node->bytes/(1024),
(UIntPtr)node->prev,
(UIntPtr)node->next,
(UIntPtr)node->last));
if (node->last != null) {
LastNode.PrintLastNode((UIntPtr)(node->last));
}
else {
DebugStub.WriteLine();
}
if (count++ > 20) {
DebugStub.WriteLine("\n **** ERROR INFINITE LIST ****\n");
DebugStub.Break();
}
}
}
internal static unsafe void PrintDomainFreeLists()
{
DebugStub.WriteLine(" DOMAIN FREE LIST");
DebugStub.WriteLine(" ------------------------------------------");
for (int i = 0; i < domainMap.Length; i++) {
if (domainMap[i].isSubMemConnected) {
DebugStub.WriteLine("\n\n Domain [{0}]:", __arglist(i));
PrintFreeList(domainMap[i].domFreeList);
}
}
}
internal static unsafe void PrintProcessorFreeLists()
{
DebugStub.WriteLine("\n");
DebugStub.WriteLine(" ******************************************");
DebugStub.WriteLine(" PROCESSOR FREE LIST");
DebugStub.WriteLine(" ******************************************");
for (int i = 0; i < processorMemoryMap.Length; i++) {
DebugStub.WriteLine("\n\n Processor [{0}]:", __arglist(i));
if (processorMemoryMap[i].isInitialized) {
PrintFreeList(processorMemoryMap[i].procFreeList);
}
}
DebugStub.WriteLine();
}
internal static unsafe UIntPtr GetFreeListTotalSize(FreeNode *list)
{
UIntPtr size = 0;
for (FreeNode *node = list->next;
node != list; node = node->next) {
size += node->bytes;
}
return size;
}
internal static unsafe void PrintProcessorAddressSpace(FreeNode *list)
{
ulong MB = 1024*1024;
for (FreeNode *node = list->next;
node != list; node = node->next) {
DebugStub.Print
("[{0:x8}..{1:x8},{2,3}MB] ",
__arglist((UIntPtr)node,
(UIntPtr)node + node->bytes,
(ulong)(node->bytes)/MB));
}
}
internal static unsafe void PrintProcessorsAddressSpaces()
{
UIntPtr size = 0;
ulong MB = 1024*1024;
DebugStub.WriteLine("Processor Address Space (Current Free List):");
for (int i = 0; i < processorMemoryMap.Length; i++) {
if (processorMemoryMap[i].isInitialized) {
size = GetFreeListTotalSize(processorMemoryMap[i].procFreeList);
DebugStub.Print(" p{0} ({1,3}MB) : ",
__arglist(i, (ulong)size/MB));
PrintProcessorAddressSpace(processorMemoryMap[i].procFreeList);
}
DebugStub.WriteLine();
}
}
[NoStackLinkCheck]
internal static unsafe FreeNode* GetFreeNodeAtBreakAddr(FreeNode *list, UIntPtr breakAddr)
{
int count = 0;
for (FreeNode *node = list->next;
node != list; node = node->next) {
if ((UIntPtr)node <= breakAddr
&& breakAddr < ((UIntPtr)node + node->bytes)) {
return node;
}
if (count++ > 20) {
DebugStub.WriteLine(" WARNING: Can't GetFreeNode ListTail.{0:x8} at {1:x8} after 20 iterations",
__arglist((UIntPtr)list, breakAddr));
DebugStub.Break();
}
}
return null;
}
// Imagine the case where the current free list contains
// node from address 100 to 1000 Now, the SRAT table says
// that a sub memory is from range 50 to 500. In
// CreateSubMemory, when we call GetFreeNodeBreakAddr(50)
// it will fail, because there is no free node at address
// 50. However this sub memory is actually intersects with
// the free list node. So the correct thing to do is to
// break it at address 100. This function will return the
// correct address (i.e. 100) to the caller, so that the
// caller can break the free list at 100 instead of 50.
// return breakAddr
[NoStackLinkCheck]
internal static unsafe UIntPtr IsPartialIntersect(FreeNode *list, UIntPtr baseAddr, UIntPtr endAddr)
{
UIntPtr nodeBaseAddr;
UIntPtr nodeEndAddr;
for (FreeNode *node = list->next;
node != list; node = node->next) {
nodeBaseAddr = (UIntPtr)node;
nodeEndAddr = (UIntPtr)(node) + node->bytes;
if (nodeBaseAddr < endAddr && nodeBaseAddr >= baseAddr) {
#if MP_VERBOSE
DebugStub.WriteLine(" ** Return Nb.{0:x8}",
__arglist(baseAddr));
#endif
return nodeBaseAddr;
}
}
return 0;
}
// This will break curNode into two nodes. For example
// curNode is from address X to Y The two nodes will be
// one from X to breakAddr and the other from breakAddr to
// Y. Also prev and next pointers are updated
[NoStackLinkCheck]
internal static unsafe void BreakListAt(FreeNode *list, FreeNode *curNode, UIntPtr breakAddr)
{
// Before breaking, need to check if this breakAddr
// has been broken before or not. If so, don't double
// break. One way to find out is to check the
// signature of the lastnode and freenode before and
// after the breakAddress respectively
FreeNode *freeNode = (FreeNode*) breakAddr;
LastNode *lastNode = (LastNode*) (breakAddr - MemoryManager.PageSize);
if (lastNode->signature == LastNode.Signature &&
freeNode->signature == FreeNode.Signature) {
#if MP_VERBOSE
DebugStub.WriteLine(" {0:x8} Has been broken before. Cancel braking.",
__arglist(breakAddr));
#endif
return;
}
// If this is the first node in the list, and the address of
// the first node is the same as curNode. Then,
// don't break this node.
if ((UIntPtr) freeNode == breakAddr &&
freeNode->prev == list) {
#if MP_VERBOSE
DebugStub.WriteLine(" {0:x8} is the first node. Cancel braking.",
__arglist(breakAddr));
#endif
return;
}
#if MP_VERBOSE
DebugStub.WriteLine(" {0:x8} is okay. Proceed Breaking", __arglist(breakAddr));
#endif
// first remember originals
LastNode *origLast = curNode->last;
FreeNode *origNext = curNode->next;
FreeNode *origPrev = curNode->prev;
UIntPtr origBytes = curNode->bytes;
bool origIsSave = curNode->isSave;
uint origSignature = curNode->signature;
// prepare the two nodes
FreeNode *firstNode = curNode;
FreeNode *secondNode = (FreeNode*)breakAddr;
UIntPtr firstNodeBase = (UIntPtr) firstNode;
UIntPtr firstNodeEnd = breakAddr;
UIntPtr secondNodeBase = breakAddr;
UIntPtr secondNodeEnd = (UIntPtr)curNode + curNode->bytes;
// now fix the second node FIRST!! (before the first node)
secondNode->next = origNext;
secondNode->prev = firstNode;
secondNode->bytes = secondNodeEnd - secondNodeBase;
secondNode->isSave = origIsSave;
secondNode->signature = origSignature;
LastNode.Create(secondNodeEnd - MemoryManager.PageSize, secondNode);
// now fix the first node
firstNode->next = secondNode;
firstNode->prev = origPrev;
firstNode->bytes = firstNodeEnd - firstNodeBase;
firstNode->isSave = origIsSave;
firstNode->signature = origSignature;
LastNode.Create(firstNodeEnd - MemoryManager.PageSize, firstNode);
// now fix the original next's previous pointer
origNext->prev = secondNode;
}
[NoStackLinkCheck]
internal static unsafe FreeNode * FindGoodFit(FreeNode *list,
UIntPtr bytes, UIntPtr alignment)
{
#if ALLOW_BOOT_ARGLIST
DebugStub.Assert(bytes > 0,
"FlatPages.FindGoodFit bytes={0}",
__arglist(bytes));
#endif
// If it is a small allocation, we try to accelerate the search.
if (bytes <= SmallSize && alignment <= MemoryManager.PageSize) {
for (FreeNode *node = list->prev; node != list; node = node->prev) {
if (node->bytes >= bytes) {
Remove(node);
return node;
}
}
return null;
}
else {
// First try to find a region closest in size to bytes...
FreeNode *best = null;
for (FreeNode *node = list->next; node != list; node = node->next) {
if (bytes <= node->bytes) {
UIntPtr full = SpaceToAlign((UIntPtr)node, alignment) + bytes;
if (full <= node->bytes) {
// If we find a candidate, remember it.
best = node;
if (full == node->bytes) {
// Stop if it is the ideal region.
break;
}
}
}
else {
// Stop if we have a candidate and we've reach smaller regions.
if (best != null) {
break;
}
}
}
if (best != null) {
Remove(best);
}
return best;
}
}
[NoStackLinkCheck]
internal static unsafe FreeNode * FindBelow(UIntPtr limit, FreeNode *list,
UIntPtr bytes, UIntPtr alignment)
{
DebugStub.Assert(bytes > 0,
"FlatPages.FindBelow bytes={0}",
__arglist(bytes));
// Try to find the first region below the limit address.
for (FreeNode *node = list->next; node != list; node = node->next) {
if ((UIntPtr)node + bytes < limit && node->bytes >= bytes) {
UIntPtr full = SpaceToAlign((UIntPtr)node, alignment) + bytes;
if ((UIntPtr)node + full < limit && node->bytes >= full) {
Remove(node);
return node;
}
}
}
return null;
}
[NoStackLinkCheck]
internal static unsafe FreeNode * GetNodeAt(UIntPtr addr)
{
UIntPtr page = MemoryManager.PageFromAddr(addr);
if (*(pageTable + page) == MemoryManager.PageFreeFirst) {
return (FreeNode *)addr;
}
return null;
}
[NoStackLinkCheck]
internal static unsafe FreeNode * GetNodeFromLast(UIntPtr addr)
{
UIntPtr page = MemoryManager.PageFromAddr(addr);
if (*(pageTable + page) == MemoryManager.PageFree &&
*(pageTable + page + 1) != MemoryManager.PageFree) {
return ((LastNode *)addr)->node;
}
if (*(pageTable + page) == MemoryManager.PageFreeFirst) {
return (FreeNode *)addr;
}
return null;
}
[NoStackLinkCheck]
internal static unsafe FreeNode * Create(UIntPtr addr, UIntPtr bytes, bool isSave)
{
// Mark a page as a node in the free list, initialize the node struct.
FreeNode * node = (FreeNode *)addr;
#if VERY_VERBOSE
Tracing.Log(Tracing.Debug,
isSave ?
"{0:x8}..{1:x8}, last={4:x8}" :
"{0:x8}..{1:x8}, last={4:x8}",
addr, addr+bytes, addr + bytes - MemoryManager.PageSize);
#endif
UIntPtr page = MemoryManager.PageFromAddr(addr);
*(pageTable + page) = MemoryManager.PageFreeFirst;
node->signature = FreeNode.Signature;
node->bytes = bytes;
node->isSave = isSave;
node->prev = null;
node->next = null;
node->last = null;
if (bytes > MemoryManager.PageSize) {
LastNode.Create(addr + bytes - MemoryManager.PageSize, node);
}
return node;
}
[NoStackLinkCheck]
internal static unsafe void CreateAndInsert(FreeNode *list,
UIntPtr addr,
UIntPtr bytes)
{
FreeNode * node = Create(addr, bytes, list->isSave);
#if VERBOSE
Tracing.Log(Tracing.Debug,
list->isSave ?
"({0:x8}, {1:x8}, true), prev={3:x8}, next={4:x8}, last={5:x8}" :
"({0:x8}, {1:x8}, false), prev={3:x8}, next={4:x8}, last={5:x8}",
addr, bytes, (UIntPtr) node->prev,
(UIntPtr) node->next, (UIntPtr) node->last);
#endif
#if ALLOW_BOOT_ARGLIST
DebugStub.Assert((bytes & MemoryManager.PageMask) == 0,
"FlatPages.CreateAndInsert bytes={0}",
__arglist(bytes));
DebugStub.Assert((node->bytes & MemoryManager.PageMask) == 0,
"FlatPages.CreateAndInsert node->bytes={0}",
__arglist(node->bytes));
#endif
InsertBySize(list, node);
}
[NoStackLinkCheck]
internal static unsafe void ReturnExtraAbove(FreeNode *list,
UIntPtr addr,
ref UIntPtr found,
UIntPtr keep)
{
CreateAndInsert(list, addr + keep, found - keep);
found = keep;
}
[NoStackLinkCheck]
internal static unsafe void ReturnExtraBelow(FreeNode *list,
ref UIntPtr addr,
ref UIntPtr found,
UIntPtr keep)
{
CreateAndInsert(list, addr, found - keep);
addr = addr + found - keep;
found = keep;
}
}
}
}
#endif // !PAGING
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