diff options
Diffstat (limited to 'src/core/memory.h')
-rw-r--r-- | src/core/memory.h | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/src/core/memory.h b/src/core/memory.h index 2a27c0251..739e5be94 100644 --- a/src/core/memory.h +++ b/src/core/memory.h @@ -4,10 +4,10 @@ #pragma once -#include <array> #include <cstddef> #include <string> #include <tuple> +#include <vector> #include <boost/icl/interval_map.hpp> #include "common/common_types.h" #include "core/memory_hook.h" @@ -23,10 +23,8 @@ namespace Memory { * be mapped. */ constexpr std::size_t PAGE_BITS = 12; -constexpr u64 PAGE_SIZE = 1 << PAGE_BITS; +constexpr u64 PAGE_SIZE = 1ULL << PAGE_BITS; constexpr u64 PAGE_MASK = PAGE_SIZE - 1; -constexpr std::size_t ADDRESS_SPACE_BITS = 36; -constexpr std::size_t PAGE_TABLE_NUM_ENTRIES = 1ULL << (ADDRESS_SPACE_BITS - PAGE_BITS); enum class PageType : u8 { /// Page is unmapped and should cause an access error. @@ -62,23 +60,35 @@ struct SpecialRegion { * 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); + /** - * Array of memory pointers backing each page. An entry can only be non-null if the - * corresponding entry in the `attributes` array is of type `Memory`. + * 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::array<u8*, PAGE_TABLE_NUM_ENTRIES> pointers; + std::vector<u8*> pointers; /** - * Contains MMIO handlers that back memory regions whose entries in the `attribute` array is of - * type `Special`. + * 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; /** - * Array of fine grained page attributes. If it is set to any value other than `Memory`, then + * 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::array<PageType, PAGE_TABLE_NUM_ENTRIES> attributes; + std::vector<PageType> attributes; }; /// Virtual user-space memory regions |