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https://github.com/Lime3DS/Lime3DS
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d553135748
This is slightly more ergonomic to use, correctly handles virtual regions which are disjoint in physical addressing space, and checks only regions which can be cached by the rasterizer.
212 lines
7.2 KiB
C++
212 lines
7.2 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <cstddef>
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#include <string>
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#include <boost/optional.hpp>
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#include "common/common_types.h"
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namespace Memory {
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/**
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* Page size used by the ARM architecture. This is the smallest granularity with which memory can
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* be mapped.
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*/
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const u32 PAGE_SIZE = 0x1000;
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const u32 PAGE_MASK = PAGE_SIZE - 1;
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const int PAGE_BITS = 12;
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const size_t PAGE_TABLE_NUM_ENTRIES = 1 << (32 - PAGE_BITS);
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/// Physical memory regions as seen from the ARM11
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enum : PAddr {
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/// IO register area
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IO_AREA_PADDR = 0x10100000,
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IO_AREA_SIZE = 0x01000000, ///< IO area size (16MB)
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IO_AREA_PADDR_END = IO_AREA_PADDR + IO_AREA_SIZE,
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/// MPCore internal memory region
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MPCORE_RAM_PADDR = 0x17E00000,
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MPCORE_RAM_SIZE = 0x00002000, ///< MPCore internal memory size (8KB)
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MPCORE_RAM_PADDR_END = MPCORE_RAM_PADDR + MPCORE_RAM_SIZE,
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/// Video memory
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VRAM_PADDR = 0x18000000,
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VRAM_SIZE = 0x00600000, ///< VRAM size (6MB)
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VRAM_PADDR_END = VRAM_PADDR + VRAM_SIZE,
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/// New 3DS additional memory. Supposedly faster than regular FCRAM. Part of it can be used by
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/// applications and system modules if mapped via the ExHeader.
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N3DS_EXTRA_RAM_PADDR = 0x1F000000,
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N3DS_EXTRA_RAM_SIZE = 0x00400000, ///< New 3DS additional memory size (4MB)
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N3DS_EXTRA_RAM_PADDR_END = N3DS_EXTRA_RAM_PADDR + N3DS_EXTRA_RAM_SIZE,
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/// DSP memory
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DSP_RAM_PADDR = 0x1FF00000,
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DSP_RAM_SIZE = 0x00080000, ///< DSP memory size (512KB)
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DSP_RAM_PADDR_END = DSP_RAM_PADDR + DSP_RAM_SIZE,
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/// AXI WRAM
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AXI_WRAM_PADDR = 0x1FF80000,
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AXI_WRAM_SIZE = 0x00080000, ///< AXI WRAM size (512KB)
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AXI_WRAM_PADDR_END = AXI_WRAM_PADDR + AXI_WRAM_SIZE,
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/// Main FCRAM
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FCRAM_PADDR = 0x20000000,
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FCRAM_SIZE = 0x08000000, ///< FCRAM size on the Old 3DS (128MB)
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FCRAM_N3DS_SIZE = 0x10000000, ///< FCRAM size on the New 3DS (256MB)
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FCRAM_PADDR_END = FCRAM_PADDR + FCRAM_SIZE,
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FCRAM_N3DS_PADDR_END = FCRAM_PADDR + FCRAM_N3DS_SIZE,
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};
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/// Virtual user-space memory regions
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enum : VAddr {
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/// Where the application text, data and bss reside.
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PROCESS_IMAGE_VADDR = 0x00100000,
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PROCESS_IMAGE_MAX_SIZE = 0x03F00000,
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PROCESS_IMAGE_VADDR_END = PROCESS_IMAGE_VADDR + PROCESS_IMAGE_MAX_SIZE,
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/// Area where IPC buffers are mapped onto.
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IPC_MAPPING_VADDR = 0x04000000,
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IPC_MAPPING_SIZE = 0x04000000,
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IPC_MAPPING_VADDR_END = IPC_MAPPING_VADDR + IPC_MAPPING_SIZE,
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/// Application heap (includes stack).
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HEAP_VADDR = 0x08000000,
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HEAP_SIZE = 0x08000000,
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HEAP_VADDR_END = HEAP_VADDR + HEAP_SIZE,
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/// Area where shared memory buffers are mapped onto.
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SHARED_MEMORY_VADDR = 0x10000000,
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SHARED_MEMORY_SIZE = 0x04000000,
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SHARED_MEMORY_VADDR_END = SHARED_MEMORY_VADDR + SHARED_MEMORY_SIZE,
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/// Maps 1:1 to an offset in FCRAM. Used for HW allocations that need to be linear in physical
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/// memory.
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LINEAR_HEAP_VADDR = 0x14000000,
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LINEAR_HEAP_SIZE = 0x08000000,
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LINEAR_HEAP_VADDR_END = LINEAR_HEAP_VADDR + LINEAR_HEAP_SIZE,
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/// Maps 1:1 to New 3DS additional memory
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N3DS_EXTRA_RAM_VADDR = 0x1E800000,
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N3DS_EXTRA_RAM_VADDR_END = N3DS_EXTRA_RAM_VADDR + N3DS_EXTRA_RAM_SIZE,
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/// Maps 1:1 to the IO register area.
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IO_AREA_VADDR = 0x1EC00000,
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IO_AREA_VADDR_END = IO_AREA_VADDR + IO_AREA_SIZE,
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/// Maps 1:1 to VRAM.
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VRAM_VADDR = 0x1F000000,
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VRAM_VADDR_END = VRAM_VADDR + VRAM_SIZE,
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/// Maps 1:1 to DSP memory.
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DSP_RAM_VADDR = 0x1FF00000,
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DSP_RAM_VADDR_END = DSP_RAM_VADDR + DSP_RAM_SIZE,
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/// Read-only page containing kernel and system configuration values.
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CONFIG_MEMORY_VADDR = 0x1FF80000,
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CONFIG_MEMORY_SIZE = 0x00001000,
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CONFIG_MEMORY_VADDR_END = CONFIG_MEMORY_VADDR + CONFIG_MEMORY_SIZE,
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/// Usually read-only page containing mostly values read from hardware.
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SHARED_PAGE_VADDR = 0x1FF81000,
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SHARED_PAGE_SIZE = 0x00001000,
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SHARED_PAGE_VADDR_END = SHARED_PAGE_VADDR + SHARED_PAGE_SIZE,
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/// Area where TLS (Thread-Local Storage) buffers are allocated.
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TLS_AREA_VADDR = 0x1FF82000,
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TLS_ENTRY_SIZE = 0x200,
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/// Equivalent to LINEAR_HEAP_VADDR, but expanded to cover the extra memory in the New 3DS.
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NEW_LINEAR_HEAP_VADDR = 0x30000000,
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NEW_LINEAR_HEAP_SIZE = 0x10000000,
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NEW_LINEAR_HEAP_VADDR_END = NEW_LINEAR_HEAP_VADDR + NEW_LINEAR_HEAP_SIZE,
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};
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bool IsValidVirtualAddress(const VAddr addr);
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bool IsValidPhysicalAddress(const PAddr addr);
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u8 Read8(VAddr addr);
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u16 Read16(VAddr addr);
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u32 Read32(VAddr addr);
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u64 Read64(VAddr addr);
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void Write8(VAddr addr, u8 data);
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void Write16(VAddr addr, u16 data);
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void Write32(VAddr addr, u32 data);
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void Write64(VAddr addr, u64 data);
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void ReadBlock(const VAddr src_addr, void* dest_buffer, size_t size);
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void WriteBlock(const VAddr dest_addr, const void* src_buffer, size_t size);
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void ZeroBlock(const VAddr dest_addr, const size_t size);
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void CopyBlock(VAddr dest_addr, VAddr src_addr, size_t size);
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u8* GetPointer(VAddr virtual_address);
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std::string ReadCString(VAddr virtual_address, std::size_t max_length);
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/**
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* Converts a virtual address inside a region with 1:1 mapping to physical memory to a physical
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* address. This should be used by services to translate addresses for use by the hardware.
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*/
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boost::optional<PAddr> TryVirtualToPhysicalAddress(VAddr addr);
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/**
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* Converts a virtual address inside a region with 1:1 mapping to physical memory to a physical
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* address. This should be used by services to translate addresses for use by the hardware.
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*
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* @deprecated Use TryVirtualToPhysicalAddress(), which reports failure.
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*/
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PAddr VirtualToPhysicalAddress(VAddr addr);
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/**
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* Undoes a mapping performed by VirtualToPhysicalAddress().
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*/
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boost::optional<VAddr> PhysicalToVirtualAddress(PAddr addr);
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/**
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* Gets a pointer to the memory region beginning at the specified physical address.
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*
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* @note This is currently implemented using PhysicalToVirtualAddress().
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*/
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u8* GetPhysicalPointer(PAddr address);
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/**
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* Adds the supplied value to the rasterizer resource cache counter of each
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* page touching the region.
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*/
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void RasterizerMarkRegionCached(PAddr start, u32 size, int count_delta);
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/**
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* Flushes any externally cached rasterizer resources touching the given region.
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*/
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void RasterizerFlushRegion(PAddr start, u32 size);
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/**
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* Flushes and invalidates any externally cached rasterizer resources touching the given region.
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*/
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void RasterizerFlushAndInvalidateRegion(PAddr start, u32 size);
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enum class FlushMode {
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/// Write back modified surfaces to RAM
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Flush,
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/// Write back modified surfaces to RAM, and also remove them from the cache
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FlushAndInvalidate,
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};
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/**
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* Flushes and invalidates any externally cached rasterizer resources touching the given virtual
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* address region.
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*/
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void RasterizerFlushVirtualRegion(VAddr start, u32 size, FlushMode mode);
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/**
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* Dynarmic has an optimization to memory accesses when the pointer to the page exists that
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* can be used by setting up the current page table as a callback. This function is used to
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* retrieve the current page table for that purpose.
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*/
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std::array<u8*, PAGE_TABLE_NUM_ENTRIES>* GetCurrentPageTablePointers();
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}
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