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Memory: Support more regions in the VAddr-PAddr translation functions

Browse source 
Also adds better documentation and removes the one-off reimplementation
of the function in pica.h.
This commit is contained in:
Yuri Kunde Schlesner 2015-05-09 03:08:11 -03:00
parent e7b6ed7578
commit 28a9e4c1d5
7 changed files with 45 additions and 51 deletions
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13
src/core/mem_map.h
View file

@ -181,10 +181,15 @@ inline const char* GetCharPointer(const VAddr address) {
return (const char *)GetPointer(address);
}
/// Converts a physical address to virtual address
VAddr PhysicalToVirtualAddress(PAddr addr);
/// Converts a virtual address to physical address
/**
* Converts a virtual address inside a region with 1:1 mapping to physical memory to a physical
* address. This should be used by services to translate addresses for use by the hardware.
*/
PAddr VirtualToPhysicalAddress(VAddr addr);
/**
* Undoes a mapping performed by VirtualToPhysicalAddress().
*/
VAddr PhysicalToVirtualAddress(PAddr addr);
} // namespace

52
src/core/mem_map_funcs.cpp
View file

@ -18,40 +18,40 @@ namespace Memory {
static std::map<u32, MemoryBlock> heap_map;
static std::map<u32, MemoryBlock> heap_linear_map;
/// 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 + LINEAR_HEAP_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)) {
} 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)) {
} 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);
return 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;
}
template <typename T>