citra/src/core/mem_map_funcs.cpp

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// 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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#include <map>
#include "common/common.h"
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#include "core/mem_map.h"
#include "core/hw/hw.h"
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#include "hle/config_mem.h"
#include "hle/shared_page.h"
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namespace Memory {
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static std::map<u32, MemoryBlock> heap_map;
static std::map<u32, MemoryBlock> heap_linear_map;
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static std::map<u32, MemoryBlock> shared_map;
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/// Convert a physical address to virtual address
VAddr PhysicalToVirtualAddress(const PAddr addr) {
// Our memory interface read/write functions assume virtual addresses. Put any physical address
// to virtual address translations here. This is quite hacky, but necessary until we implement
// proper MMU emulation.
// TODO: Screw it, I'll let bunnei figure out how to do this properly.
if (addr == 0) {
return 0;
} else if ((addr >= VRAM_PADDR) && (addr < VRAM_PADDR_END)) {
return addr - VRAM_PADDR + VRAM_VADDR;
} else if ((addr >= FCRAM_PADDR) && (addr < FCRAM_PADDR_END)) {
return addr - FCRAM_PADDR + HEAP_LINEAR_VADDR;
}
LOG_ERROR(HW_Memory, "Unknown physical address @ 0x%08x", addr);
return addr;
}
/// Convert a physical address to virtual address
PAddr VirtualToPhysicalAddress(const VAddr addr) {
// Our memory interface read/write functions assume virtual addresses. Put any physical address
// to virtual address translations here. This is quite hacky, but necessary until we implement
// proper MMU emulation.
// TODO: Screw it, I'll let bunnei figure out how to do this properly.
if (addr == 0) {
return 0;
} else if ((addr >= VRAM_VADDR) && (addr < VRAM_VADDR_END)) {
return addr - VRAM_VADDR + VRAM_PADDR;
} else if ((addr >= HEAP_LINEAR_VADDR) && (addr < HEAP_LINEAR_VADDR_END)) {
return addr - HEAP_LINEAR_VADDR + FCRAM_PADDR;
}
LOG_ERROR(HW_Memory, "Unknown virtual address @ 0x%08x", addr);
return addr;
}
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template <typename T>
inline void Read(T &var, const VAddr vaddr) {
// TODO: Figure out the fastest order of tests for both read and write (they are probably different).
// TODO: Make sure this represents the mirrors in a correct way.
// Could just do a base-relative read, too.... TODO
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// Kernel memory command buffer
if (vaddr >= KERNEL_MEMORY_VADDR && vaddr < KERNEL_MEMORY_VADDR_END) {
var = *((const T*)&g_kernel_mem[vaddr - KERNEL_MEMORY_VADDR]);
// ExeFS:/.code is loaded here
} else if ((vaddr >= EXEFS_CODE_VADDR) && (vaddr < EXEFS_CODE_VADDR_END)) {
var = *((const T*)&g_exefs_code[vaddr - EXEFS_CODE_VADDR]);
// FCRAM - linear heap
} else if ((vaddr >= HEAP_LINEAR_VADDR) && (vaddr < HEAP_LINEAR_VADDR_END)) {
var = *((const T*)&g_heap_linear[vaddr - HEAP_LINEAR_VADDR]);
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// FCRAM - application heap
} else if ((vaddr >= HEAP_VADDR) && (vaddr < HEAP_VADDR_END)) {
var = *((const T*)&g_heap[vaddr - HEAP_VADDR]);
// Shared memory
} else if ((vaddr >= SHARED_MEMORY_VADDR) && (vaddr < SHARED_MEMORY_VADDR_END)) {
var = *((const T*)&g_shared_mem[vaddr - SHARED_MEMORY_VADDR]);
// System memory
} else if ((vaddr >= SYSTEM_MEMORY_VADDR) && (vaddr < SYSTEM_MEMORY_VADDR_END)) {
var = *((const T*)&g_system_mem[vaddr - SYSTEM_MEMORY_VADDR]);
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// Config memory
} else if ((vaddr >= CONFIG_MEMORY_VADDR) && (vaddr < CONFIG_MEMORY_VADDR_END)) {
ConfigMem::Read<T>(var, vaddr);
// Shared page
} else if ((vaddr >= SHARED_PAGE_VADDR) && (vaddr < SHARED_PAGE_VADDR_END)) {
SharedPage::Read<T>(var, vaddr);
// DSP memory
} else if ((vaddr >= DSP_MEMORY_VADDR) && (vaddr < DSP_MEMORY_VADDR_END)) {
var = *((const T*)&g_dsp_mem[vaddr - DSP_MEMORY_VADDR]);
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// VRAM
} else if ((vaddr >= VRAM_VADDR) && (vaddr < VRAM_VADDR_END)) {
var = *((const T*)&g_vram[vaddr - VRAM_VADDR]);
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} else {
LOG_ERROR(HW_Memory, "unknown Read%lu @ 0x%08X", sizeof(var) * 8, vaddr);
}
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}
template <typename T>
inline void Write(const VAddr vaddr, const T data) {
// Kernel memory command buffer
if (vaddr >= KERNEL_MEMORY_VADDR && vaddr < KERNEL_MEMORY_VADDR_END) {
*(T*)&g_kernel_mem[vaddr - KERNEL_MEMORY_VADDR] = data;
// ExeFS:/.code is loaded here
} else if ((vaddr >= EXEFS_CODE_VADDR) && (vaddr < EXEFS_CODE_VADDR_END)) {
*(T*)&g_exefs_code[vaddr - EXEFS_CODE_VADDR] = data;
// FCRAM - linear heap
} else if ((vaddr >= HEAP_LINEAR_VADDR) && (vaddr < HEAP_LINEAR_VADDR_END)) {
*(T*)&g_heap_linear[vaddr - HEAP_LINEAR_VADDR] = data;
// FCRAM - application heap
} else if ((vaddr >= HEAP_VADDR) && (vaddr < HEAP_VADDR_END)) {
*(T*)&g_heap[vaddr - HEAP_VADDR] = data;
// Shared memory
} else if ((vaddr >= SHARED_MEMORY_VADDR) && (vaddr < SHARED_MEMORY_VADDR_END)) {
*(T*)&g_shared_mem[vaddr - SHARED_MEMORY_VADDR] = data;
// System memory
} else if ((vaddr >= SYSTEM_MEMORY_VADDR) && (vaddr < SYSTEM_MEMORY_VADDR_END)) {
*(T*)&g_system_mem[vaddr - SYSTEM_MEMORY_VADDR] = data;
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// VRAM
} else if ((vaddr >= VRAM_VADDR) && (vaddr < VRAM_VADDR_END)) {
*(T*)&g_vram[vaddr - VRAM_VADDR] = data;
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// DSP memory
} else if ((vaddr >= DSP_MEMORY_VADDR) && (vaddr < DSP_MEMORY_VADDR_END)) {
*(T*)&g_dsp_mem[vaddr - DSP_MEMORY_VADDR] = data;
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//} else if ((vaddr & 0xFFFF0000) == 0x1FF80000) {
// ASSERT_MSG(MEMMAP, false, "umimplemented write to Configuration Memory");
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//} else if ((vaddr & 0xFFFFF000) == 0x1FF81000) {
// ASSERT_MSG(MEMMAP, false, "umimplemented write to shared page");
// Error out...
} else {
LOG_ERROR(HW_Memory, "unknown Write%lu 0x%08X @ 0x%08X", sizeof(data) * 8, (u32)data, vaddr);
}
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}
u8 *GetPointer(const VAddr vaddr) {
// Kernel memory command buffer
if (vaddr >= KERNEL_MEMORY_VADDR && vaddr < KERNEL_MEMORY_VADDR_END) {
return g_kernel_mem + (vaddr - KERNEL_MEMORY_VADDR);
// ExeFS:/.code is loaded here
} else if ((vaddr >= EXEFS_CODE_VADDR) && (vaddr < EXEFS_CODE_VADDR_END)) {
return g_exefs_code + (vaddr - EXEFS_CODE_VADDR);
// FCRAM - linear heap
} else if ((vaddr >= HEAP_LINEAR_VADDR) && (vaddr < HEAP_LINEAR_VADDR_END)) {
return g_heap_linear + (vaddr - HEAP_LINEAR_VADDR);
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// FCRAM - application heap
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} else if ((vaddr >= HEAP_VADDR) && (vaddr < HEAP_VADDR_END)) {
return g_heap + (vaddr - HEAP_VADDR);
// Shared memory
} else if ((vaddr >= SHARED_MEMORY_VADDR) && (vaddr < SHARED_MEMORY_VADDR_END)) {
return g_shared_mem + (vaddr - SHARED_MEMORY_VADDR);
// System memory
} else if ((vaddr >= SYSTEM_MEMORY_VADDR) && (vaddr < SYSTEM_MEMORY_VADDR_END)) {
return g_system_mem + (vaddr - SYSTEM_MEMORY_VADDR);
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// VRAM
} else if ((vaddr >= VRAM_VADDR) && (vaddr < VRAM_VADDR_END)) {
return g_vram + (vaddr - VRAM_VADDR);
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} else {
LOG_ERROR(HW_Memory, "unknown GetPointer @ 0x%08x", vaddr);
return 0;
}
}
/**
* Maps a block of memory on the heap
* @param size Size of block in bytes
* @param operation Memory map operation type
* @param flags Memory allocation flags
*/
u32 MapBlock_Heap(u32 size, u32 operation, u32 permissions) {
MemoryBlock block;
block.base_address = HEAP_VADDR;
block.size = size;
block.operation = operation;
block.permissions = permissions;
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if (heap_map.size() > 0) {
const MemoryBlock last_block = heap_map.rbegin()->second;
block.address = last_block.address + last_block.size;
}
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heap_map[block.GetVirtualAddress()] = block;
return block.GetVirtualAddress();
}
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/**
* Maps a block of memory on the linear heap
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* @param size Size of block in bytes
* @param operation Memory map operation type
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* @param flags Memory allocation flags
*/
u32 MapBlock_HeapLinear(u32 size, u32 operation, u32 permissions) {
MemoryBlock block;
block.base_address = HEAP_LINEAR_VADDR;
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block.size = size;
block.operation = operation;
block.permissions = permissions;
if (heap_linear_map.size() > 0) {
const MemoryBlock last_block = heap_linear_map.rbegin()->second;
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block.address = last_block.address + last_block.size;
}
heap_linear_map[block.GetVirtualAddress()] = block;
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return block.GetVirtualAddress();
}
u8 Read8(const VAddr addr) {
u8 data = 0;
Read<u8>(data, addr);
return data;
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}
u16 Read16(const VAddr addr) {
u16_le data = 0;
Read<u16_le>(data, addr);
return (u16)data;
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}
u32 Read32(const VAddr addr) {
u32_le data = 0;
Read<u32_le>(data, addr);
return (u32)data;
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}
u64 Read64(const VAddr addr) {
u64_le data = 0;
Read<u64_le>(data, addr);
return (u64)data;
}
u32 Read8_ZX(const VAddr addr) {
return (u32)Read8(addr);
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}
u32 Read16_ZX(const VAddr addr) {
return (u32)Read16(addr);
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}
void Write8(const VAddr addr, const u8 data) {
Write<u8>(addr, data);
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}
void Write16(const VAddr addr, const u16 data) {
Write<u16_le>(addr, data);
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}
void Write32(const VAddr addr, const u32 data) {
Write<u32_le>(addr, data);
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}
void Write64(const VAddr addr, const u64 data) {
Write<u64_le>(addr, data);
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}
void WriteBlock(const VAddr addr, const u8* data, const size_t size) {
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u32 offset = 0;
while (offset < (size & ~3)) {
Write32(addr + offset, *(u32*)&data[offset]);
offset += 4;
}
if (size & 2) {
Write16(addr + offset, *(u16*)&data[offset]);
offset += 2;
}
if (size & 1)
Write8(addr + offset, data[offset]);
}
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} // namespace