Memmap: Re-organize memory function in two files

memory.cpp/h contains definitions related to acessing memory and
configuring the address space
mem_map.cpp/h contains higher-level definitions related to configuring
the address space accoording to the kernel and allocating memory.

1 files changed, 95 insertions, 2 deletions

diff --git a/src/core/mem_map.cpp b/src/core/mem_map.cpp
index f9952046..66c2f77c 100644
--- a/src/core/mem_map.cpp
+++ b/src/core/mem_map.cpp
@@ -2,10 +2,13 @@
 // 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/mem_map.h"
+#include "core/memory.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
@@ -37,19 +40,109 @@ static MemoryArea memory_areas[] = {
     {&g_tls_mem,     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() {
     for (MemoryArea& area : memory_areas) {
         *area.ptr = new u8[area.size];
     }
-    MemBlock_Init();
 
     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;