diff options
Diffstat (limited to 'src/core/memory.cpp')
-rw-r--r-- | src/core/memory.cpp | 87 |
1 files changed, 12 insertions, 75 deletions
diff --git a/src/core/memory.cpp b/src/core/memory.cpp index 65649d9d7..ea46b6ead 100644 --- a/src/core/memory.cpp +++ b/src/core/memory.cpp @@ -11,75 +11,18 @@ #include "core/hle/kernel/process.h" #include "core/memory.h" #include "core/memory_setup.h" -#include "core/mmio.h" #include "video_core/renderer_base.h" #include "video_core/video_core.h" namespace Memory { -enum class PageType { - /// 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, - /// Page is mapped to a I/O region, but also needs to check for rasterizer cache flushing and - /// invalidation - RasterizerCachedSpecial, -}; - -struct SpecialRegion { - VAddr base; - u32 size; - MMIORegionPointer handler; -}; - -/** - * A (reasonably) fast way of allowing switchable and remappable process address spaces. It loosely - * mimics the way a real CPU page table works, but instead is optimized for minimal decoding and - * fetching requirements when accessing. In the usual case of an access to regular memory, it only - * requires an indexed fetch and a check for NULL. - */ -struct PageTable { - /** - * 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`. - */ - std::array<u8*, PAGE_TABLE_NUM_ENTRIES> pointers; - - /** - * Contains MMIO handlers that back memory regions whose entries in the `attribute` array is of - * type `Special`. - */ - std::vector<SpecialRegion> special_regions; - - /** - * Array 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; - - /** - * Indicates the number of externally cached resources touching a page that should be - * flushed before the memory is accessed - */ - std::array<u8, PAGE_TABLE_NUM_ENTRIES> cached_res_count; -}; - -/// Singular page table used for the singleton process -static PageTable main_page_table; -/// Currently active page table -static PageTable* current_page_table = &main_page_table; +PageTable* current_page_table = nullptr; std::array<u8*, PAGE_TABLE_NUM_ENTRIES>* GetCurrentPageTablePointers() { return ¤t_page_table->pointers; } -static void MapPages(u32 base, u32 size, u8* memory, PageType type) { +static void MapPages(PageTable& page_table, u32 base, u32 size, u8* memory, PageType type) { LOG_DEBUG(HW_Memory, "Mapping %p onto %08X-%08X", memory, base * PAGE_SIZE, (base + size) * PAGE_SIZE); @@ -90,9 +33,9 @@ static void MapPages(u32 base, u32 size, u8* memory, PageType type) { while (base != end) { ASSERT_MSG(base < PAGE_TABLE_NUM_ENTRIES, "out of range mapping at %08X", base); - current_page_table->attributes[base] = type; - current_page_table->pointers[base] = memory; - current_page_table->cached_res_count[base] = 0; + page_table.attributes[base] = type; + page_table.pointers[base] = memory; + page_table.cached_res_count[base] = 0; base += 1; if (memory != nullptr) @@ -100,30 +43,24 @@ static void MapPages(u32 base, u32 size, u8* memory, PageType type) { } } -void InitMemoryMap() { - main_page_table.pointers.fill(nullptr); - main_page_table.attributes.fill(PageType::Unmapped); - main_page_table.cached_res_count.fill(0); -} - -void MapMemoryRegion(VAddr base, u32 size, u8* target) { +void MapMemoryRegion(PageTable& page_table, VAddr base, u32 size, u8* target) { ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size); ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base); - MapPages(base / PAGE_SIZE, size / PAGE_SIZE, target, PageType::Memory); + MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, target, PageType::Memory); } -void MapIoRegion(VAddr base, u32 size, MMIORegionPointer mmio_handler) { +void MapIoRegion(PageTable& page_table, VAddr base, u32 size, MMIORegionPointer mmio_handler) { ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size); ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base); - MapPages(base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Special); + MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Special); - current_page_table->special_regions.emplace_back(SpecialRegion{base, size, mmio_handler}); + page_table.special_regions.emplace_back(SpecialRegion{base, size, mmio_handler}); } -void UnmapRegion(VAddr base, u32 size) { +void UnmapRegion(PageTable& page_table, VAddr base, u32 size) { ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size); ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base); - MapPages(base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Unmapped); + MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Unmapped); } /** |