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Memory: Add TryVirtualToPhysicalAddress, returning a boost::optional

This commit is contained in:
Yuri Kunde Schlesner 2017-06-21 20:25:46 -07:00
parent 326e7c7020
commit 6ae0086b39
2 changed files with 23 additions and 7 deletions
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10
src/core/memory.cpp
View File

@ -670,7 +670,7 @@ void WriteMMIO<u64>(MMIORegionPointer mmio_handler, VAddr addr, const u64 data)
mmio_handler->Write64(addr, data);
}
PAddr VirtualToPhysicalAddress(const VAddr addr) {
boost::optional<PAddr> TryVirtualToPhysicalAddress(const VAddr addr) {
if (addr == 0) {
return 0;
} else if (addr >= VRAM_VADDR && addr < VRAM_VADDR_END) {
@ -687,10 +687,18 @@ PAddr VirtualToPhysicalAddress(const VAddr addr) {
return addr - N3DS_EXTRA_RAM_VADDR + N3DS_EXTRA_RAM_PADDR;
}
return boost::none;
}
PAddr VirtualToPhysicalAddress(const VAddr addr) {
auto paddr = TryVirtualToPhysicalAddress(addr);
if (!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;
}
return *paddr;
}
boost::optional<VAddr> PhysicalToVirtualAddress(const PAddr addr) {
if (addr == 0) {

8
src/core/memory.h
View File

@ -152,6 +152,14 @@ std::string ReadCString(VAddr virtual_address, std::size_t max_length);
* 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.
*/
boost::optional<PAddr> TryVirtualToPhysicalAddress(VAddr addr);
/**
* 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.
*
* @deprecated Use TryVirtualToPhysicalAddress(), which reports failure.
*/
PAddr VirtualToPhysicalAddress(VAddr addr);
/**