Merge pull request #762 from yuriks/memmap

Memory: Use a table based lookup scheme to read from memory regions

1 files changed, 112 insertions, 10 deletions

diff --git a/src/core/mem_map.cpp b/src/core/mem_map.cpp
index f99520464..5ecec9566 100644
--- a/src/core/mem_map.cpp
+++ b/src/core/mem_map.cpp
@@ -2,10 +2,16 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <map>
+
 #include "common/common_types.h"
 #include "common/logging/log.h"
 
+#include "core/hle/config_mem.h"
+#include "core/hle/shared_page.h"
 #include "core/mem_map.h"
+#include "core/memory.h"
+#include "core/memory_setup.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
@@ -23,33 +29,129 @@ namespace {
 
 struct MemoryArea {
     u8** ptr;
-    size_t size;
+    u32 base;
+    u32 size;
 };
 
 // We don't declare the IO regions in here since its handled by other means.
 static MemoryArea memory_areas[] = {
-    {&g_exefs_code,  PROCESS_IMAGE_MAX_SIZE},
-    {&g_heap,        HEAP_SIZE             },
-    {&g_shared_mem,  SHARED_MEMORY_SIZE    },
-    {&g_heap_linear, LINEAR_HEAP_SIZE      },
-    {&g_vram,        VRAM_SIZE             },
-    {&g_dsp_mem,     DSP_RAM_SIZE          },
-    {&g_tls_mem,     TLS_AREA_SIZE         },
+    {&g_exefs_code,  PROCESS_IMAGE_VADDR, PROCESS_IMAGE_MAX_SIZE},
+    {&g_heap,        HEAP_VADDR,          HEAP_SIZE             },
+    {&g_shared_mem,  SHARED_MEMORY_VADDR, SHARED_MEMORY_SIZE    },
+    {&g_heap_linear, LINEAR_HEAP_VADDR,   LINEAR_HEAP_SIZE      },
+    {&g_vram,        VRAM_VADDR,          VRAM_SIZE             },
+    {&g_dsp_mem,     DSP_RAM_VADDR,       DSP_RAM_SIZE          },
+    {&g_tls_mem,     TLS_AREA_VADDR,      TLS_AREA_SIZE         },
+};
+
+/// Represents a block of memory mapped by ControlMemory/MapMemoryBlock
+struct MemoryBlock {
+    MemoryBlock() : handle(0), base_address(0), address(0), size(0), operation(0), permissions(0) {
+    }
+    u32 handle;
+    u32 base_address;
+    u32 address;
+    u32 size;
+    u32 operation;
+    u32 permissions;
+
+    const u32 GetVirtualAddress() const{
+        return base_address + address;
+    }
 };
 
+static std::map<u32, MemoryBlock> heap_map;
+static std::map<u32, MemoryBlock> heap_linear_map;
+
+}
+
+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;
+
+    if (heap_map.size() > 0) {
+        const MemoryBlock last_block = heap_map.rbegin()->second;
+        block.address = last_block.address + last_block.size;
+    }
+    heap_map[block.GetVirtualAddress()] = block;
+
+    return block.GetVirtualAddress();
+}
+
+u32 MapBlock_HeapLinear(u32 size, u32 operation, u32 permissions) {
+    MemoryBlock block;
+
+    block.base_address  = LINEAR_HEAP_VADDR;
+    block.size          = size;
+    block.operation     = operation;
+    block.permissions   = permissions;
+
+    if (heap_linear_map.size() > 0) {
+        const MemoryBlock last_block = heap_linear_map.rbegin()->second;
+        block.address = last_block.address + last_block.size;
+    }
+    heap_linear_map[block.GetVirtualAddress()] = block;
+
+    return block.GetVirtualAddress();
+}
+
+PAddr VirtualToPhysicalAddress(const VAddr addr) {
+    if (addr == 0) {
+        return 0;
+    } else if (addr >= VRAM_VADDR && addr < VRAM_VADDR_END) {
+        return addr - VRAM_VADDR + VRAM_PADDR;
+    } else if (addr >= LINEAR_HEAP_VADDR && addr < LINEAR_HEAP_VADDR_END) {
+        return addr - LINEAR_HEAP_VADDR + FCRAM_PADDR;
+    } else if (addr >= DSP_RAM_VADDR && addr < DSP_RAM_VADDR_END) {
+        return addr - DSP_RAM_VADDR + DSP_RAM_PADDR;
+    } else if (addr >= IO_AREA_VADDR && addr < IO_AREA_VADDR_END) {
+        return addr - IO_AREA_VADDR + IO_AREA_PADDR;
+    }
+
+    LOG_ERROR(HW_Memory, "Unknown virtual address @ 0x%08x", addr);
+    // To help with debugging, set bit on address so that it's obviously invalid.
+    return addr | 0x80000000;
+}
+
+VAddr PhysicalToVirtualAddress(const PAddr addr) {
+    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 + LINEAR_HEAP_VADDR;
+    } else if (addr >= DSP_RAM_PADDR && addr < DSP_RAM_PADDR_END) {
+        return addr - DSP_RAM_PADDR + DSP_RAM_VADDR;
+    } else if (addr >= IO_AREA_PADDR && addr < IO_AREA_PADDR_END) {
+        return addr - IO_AREA_PADDR + IO_AREA_VADDR;
+    }
+
+    LOG_ERROR(HW_Memory, "Unknown physical address @ 0x%08x", addr);
+    // To help with debugging, set bit on address so that it's obviously invalid.
+    return addr | 0x80000000;
 }
 
 void Init() {
+    InitMemoryMap();
+
     for (MemoryArea& area : memory_areas) {
         *area.ptr = new u8[area.size];
+        MapMemoryRegion(area.base, area.size, *area.ptr);
     }
-    MemBlock_Init();
+    MapMemoryRegion(CONFIG_MEMORY_VADDR, CONFIG_MEMORY_SIZE, (u8*)&ConfigMem::config_mem);
+    MapMemoryRegion(SHARED_PAGE_VADDR, SHARED_PAGE_SIZE, (u8*)&SharedPage::shared_page);
 
     LOG_DEBUG(HW_Memory, "initialized OK, RAM at %p", g_heap);
 }
 
 void Shutdown() {
-    MemBlock_Shutdown();
+    heap_map.clear();
+    heap_linear_map.clear();
+
     for (MemoryArea& area : memory_areas) {
         delete[] *area.ptr;
         *area.ptr = nullptr;