The Stack of pages (below4GB, below64GB, no constraint). More...
Collaboration diagram for X86CommonPhysicalMemoryManager::PageStack:
Public Member Functions | |
| PageStack () INITIALISATION_ONLY | |
| physical_uintptr_t | allocate (size_t constraints) |
| void | free (uint64_t physicalAddress, size_t length) |
| ~PageStack () | |
| size_t | freePages () const |
| void | setCapacity (size_t newCapacity) |
| void | increaseCapacity (size_t by) |
Protected Member Functions | |
| void | markAbove4GReady () |
| void | markBelow4GReady () |
Private Member Functions | |
| PageStack (const PageStack &) | |
| PageStack & | operator= (const PageStack &) |
| bool | maybeMap (size_t index, uint64_t physicalAddress) |
Private Attributes | |
| void * | m_Stack [StackCount] |
| size_t | m_StackMax [StackCount] |
| size_t | m_StackSize [StackCount] |
| size_t | m_FreePages |
| size_t | m_Capacity |
| size_t | m_DesiredCapacity |
| Atomic< bool > | m_StackReady [StackCount] |
Static Private Attributes | |
| static const size_t | StackCount = 3 |
Friends | |
| class | X86CommonPhysicalMemoryManager |
Detailed Description
The Stack of pages (below4GB, below64GB, no constraint).
The actual page stack contains is a Stack of the pages with the constraints below4GB and below64GB and those pages without address size constraints.
Definition at line 119 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
Constructor & Destructor Documentation
| X86CommonPhysicalMemoryManager::PageStack::PageStack | ( | ) |
Default constructor does nothing
Definition at line 1060 of file x86_common/PhysicalMemoryManager.cc.
Referenced by ~PageStack().
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inline |
The destructor does nothing
Definition at line 134 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
References m_DesiredCapacity, m_FreePages, markAbove4GReady(), markBelow4GReady(), maybeMap(), operator=(), PageStack(), and StackCount.
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private |
The copy-constructor
- Note
- Not implemented
Member Function Documentation
| physical_uintptr_t X86CommonPhysicalMemoryManager::PageStack::allocate | ( | size_t | constraints | ) |
Allocate a page with certain constraints
- Parameters
-
[in] constraints either below4GB or below64GB or 0
- Returns
- The physical address of the allocated page or 0
- Note
- Testing.
Definition at line 903 of file x86_common/PhysicalMemoryManager.cc.
References PhysicalMemoryManager::below4GB, PhysicalMemoryManager::below64GB, g_FreePages, PhysicalMemoryManager::getPageSize(), Processor::pause(), and physicalAddress().
| void X86CommonPhysicalMemoryManager::PageStack::free | ( | uint64_t | physicalAddress, |
| size_t | length | ||
| ) |
Free a physical page
- Parameters
-
[in] physicalAddress physical address of the page
- Todo:
- make sure callers split any regions that cross over before calling
- Note
- Testing.
Definition at line 989 of file x86_common/PhysicalMemoryManager.cc.
References g_FreePages, PhysicalMemoryManager::getPageSize(), physicalAddress(), and UNLIKELY.
Referenced by X86CommonPhysicalMemoryManager::unmapRegion().
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protected |
Mark all stacks tracking pages above 4GB mark ready.
Definition at line 1082 of file x86_common/PhysicalMemoryManager.cc.
Referenced by ~PageStack().
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protected |
Mark stacks tracking pages below 4GB mark ready.
Definition at line 1090 of file x86_common/PhysicalMemoryManager.cc.
Referenced by ~PageStack().
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private |
Potentially use the given page to map paging structures for future stack frees.
- Returns
- true if the page was consumed, false otherwise.
Definition at line 1095 of file x86_common/PhysicalMemoryManager.cc.
References FATAL, VirtualAddressSpace::getKernelAddressSpace(), PhysicalMemoryManager::getPageSize(), X64VirtualAddressSpace::isMapped(), VirtualAddressSpace::KernelMode, X64VirtualAddressSpace::mapPageStructures(), and VirtualAddressSpace::Write.
Referenced by ~PageStack().
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The copy-constructor
- Note
- Not implemented
Referenced by ~PageStack().
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Member Data Documentation
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private |
Current capacity (i.e. mapped pages).
Definition at line 192 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
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private |
Desired capacity. New pages will be mapped until demand is met.
Definition at line 194 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
Referenced by ~PageStack().
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private |
Current pages available.
Definition at line 190 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
Referenced by ~PageStack().
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private |
Pointer to the base address of the stack. The stack grows upwards.
Definition at line 184 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
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private |
Size of the currently mapped stack
Definition at line 186 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
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private |
Whether or not a particular stack is ready for use.
Definition at line 197 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
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private |
Currently used size of the stack
Definition at line 188 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
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staticprivate |
The number of Stacks
Definition at line 179 of file kernel/core/processor/x86_common/PhysicalMemoryManager.h.
Referenced by ~PageStack().
The documentation for this class was generated from the following files:
