diff options
Diffstat (limited to 'src/core/memory.h')
| -rw-r--r-- | src/core/memory.h | 63 |
1 files changed, 22 insertions, 41 deletions
diff --git a/src/core/memory.h b/src/core/memory.h index 2a27c0251..1acf5ce8c 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. @@ -62,32 +60,39 @@ 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 enum : VAddr { - /// Where the application text, data and bss reside. - PROCESS_IMAGE_VADDR = 0x08000000, - PROCESS_IMAGE_MAX_SIZE = 0x08000000, - PROCESS_IMAGE_VADDR_END = PROCESS_IMAGE_VADDR + PROCESS_IMAGE_MAX_SIZE, - /// Read-only page containing kernel and system configuration values. CONFIG_MEMORY_VADDR = 0x1FF80000, CONFIG_MEMORY_SIZE = 0x00001000, @@ -98,36 +103,12 @@ enum : VAddr { SHARED_PAGE_SIZE = 0x00001000, SHARED_PAGE_VADDR_END = SHARED_PAGE_VADDR + SHARED_PAGE_SIZE, - /// Area where TLS (Thread-Local Storage) buffers are allocated. - TLS_AREA_VADDR = 0x40000000, + /// TLS (Thread-Local Storage) related. TLS_ENTRY_SIZE = 0x200, - TLS_AREA_SIZE = 0x10000000, - TLS_AREA_VADDR_END = TLS_AREA_VADDR + TLS_AREA_SIZE, /// Application stack - STACK_AREA_VADDR = TLS_AREA_VADDR_END, - STACK_AREA_SIZE = 0x10000000, - STACK_AREA_VADDR_END = STACK_AREA_VADDR + STACK_AREA_SIZE, DEFAULT_STACK_SIZE = 0x100000, - /// Application heap - /// Size is confirmed to be a static value on fw 3.0.0 - HEAP_VADDR = 0x108000000, - HEAP_SIZE = 0x180000000, - HEAP_VADDR_END = HEAP_VADDR + HEAP_SIZE, - - /// New map region - /// Size is confirmed to be a static value on fw 3.0.0 - NEW_MAP_REGION_VADDR = HEAP_VADDR_END, - NEW_MAP_REGION_SIZE = 0x80000000, - NEW_MAP_REGION_VADDR_END = NEW_MAP_REGION_VADDR + NEW_MAP_REGION_SIZE, - - /// Map region - /// Size is confirmed to be a static value on fw 3.0.0 - MAP_REGION_VADDR = NEW_MAP_REGION_VADDR_END, - MAP_REGION_SIZE = 0x1000000000, - MAP_REGION_VADDR_END = MAP_REGION_VADDR + MAP_REGION_SIZE, - /// Kernel Virtual Address Range KERNEL_REGION_VADDR = 0xFFFFFF8000000000, KERNEL_REGION_SIZE = 0x7FFFE00000, |