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core: Move PageTable struct into Common.

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This commit is contained in:
bunnei
2019-03-02 15:20:28 -05:00
parent 2392e146b0
commit 93da8e0abf
16 changed files with 215 additions and 171 deletions
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74
src/core/memory.h
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@ -10,7 +10,10 @@
#include <vector>
#include <boost/icl/interval_map.hpp>
#include "common/common_types.h"
#include "core/memory_hook.h"
namespace Common {
struct PageTable;
}
namespace Kernel {
class Process;
@ -26,71 +29,6 @@ constexpr std::size_t PAGE_BITS = 12;
constexpr u64 PAGE_SIZE = 1ULL << PAGE_BITS;
constexpr u64 PAGE_MASK = PAGE_SIZE - 1;
enum class PageType : u8 {
/// Page is unmapped and should cause an access error.
Unmapped,
/// Page is mapped to regular memory. This is the only type you can get pointers to.
Memory,
/// Page is mapped to regular memory, but also needs to check for rasterizer cache flushing and
/// invalidation
RasterizerCachedMemory,
/// Page is mapped to a I/O region. Writing and reading to this page is handled by functions.
Special,
};
struct SpecialRegion {
enum class Type {
DebugHook,
IODevice,
} type;
MemoryHookPointer handler;
bool operator<(const SpecialRegion& other) const {
return std::tie(type, handler) < std::tie(other.type, other.handler);
}
bool operator==(const SpecialRegion& other) const {
return std::tie(type, handler) == std::tie(other.type, other.handler);
}
};
/**
* A (reasonably) fast way of allowing switchable and remappable process address spaces. It loosely
* mimics the way a real CPU page table works.
*/
struct PageTable {
explicit PageTable();
explicit PageTable(std::size_t address_space_width_in_bits);
~PageTable();
/**
* Resizes the page table to be able to accomodate enough pages within
* a given address space.
*
* @param address_space_width_in_bits The address size width in bits.
*/
void Resize(std::size_t address_space_width_in_bits);
/**
* Vector of memory pointers backing each page. An entry can only be non-null if the
* corresponding entry in the `attributes` vector is of type `Memory`.
*/
std::vector<u8*> pointers;
/**
* Contains MMIO handlers that back memory regions whose entries in the `attribute` vector is
* of type `Special`.
*/
boost::icl::interval_map<VAddr, std::set<SpecialRegion>> special_regions;
/**
* Vector of fine grained page attributes. If it is set to any value other than `Memory`, then
* the corresponding entry in `pointers` MUST be set to null.
*/
std::vector<PageType> attributes;
};
/// Virtual user-space memory regions
enum : VAddr {
/// Read-only page containing kernel and system configuration values.
@ -116,8 +54,8 @@ enum : VAddr {
};
/// Currently active page table
void SetCurrentPageTable(PageTable* page_table);
PageTable* GetCurrentPageTable();
void SetCurrentPageTable(Common::PageTable* page_table);
Common::PageTable* GetCurrentPageTable();
/// Determines if the given VAddr is valid for the specified process.
bool IsValidVirtualAddress(const Kernel::Process& process, VAddr vaddr);