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Memory: IsValidVirtualAddress/IsValidPhysicalAddress

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MerryMage 2016-04-16 08:46:11 +01:00 • committed by Subv
parent 51ee2d2eb1
commit c084fc824c
3 changed files with 26 additions and 0 deletions
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21
src/core/memory.cpp
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@ -246,6 +246,26 @@ void Write(const VAddr vaddr, const T data) {
}
}
bool IsValidVirtualAddress(const VAddr vaddr) {
const u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer)
return true;
if (current_page_table->attributes[vaddr >> PAGE_BITS] != PageType::Special)
return false;
MMIORegionPointer mmio_region = GetMMIOHandler(vaddr);
if (mmio_region) {
return mmio_region->IsValidAddress(vaddr);
}
return false;
}
bool IsValidPhysicalAddress(const PAddr paddr) {
return IsValidVirtualAddress(PhysicalToVirtualAddress(paddr));
}
u8* GetPointer(const VAddr vaddr) {
u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer) {
@ -261,6 +281,7 @@ u8* GetPointer(const VAddr vaddr) {
}
u8* GetPhysicalPointer(PAddr address) {
// TODO(Subv): This call should not go through the application's memory mapping.
return GetPointer(PhysicalToVirtualAddress(address));
}

3
src/core/memory.h
View file

@ -110,6 +110,9 @@ enum : VAddr {
NEW_LINEAR_HEAP_VADDR_END = NEW_LINEAR_HEAP_VADDR + NEW_LINEAR_HEAP_SIZE,
};
bool IsValidVirtualAddress(const VAddr addr);
bool IsValidPhysicalAddress(const PAddr addr);
u8 Read8(VAddr addr);
u16 Read16(VAddr addr);
u32 Read32(VAddr addr);

2
src/core/mmio.h
View file

@ -18,6 +18,8 @@ class MMIORegion {
public:
virtual ~MMIORegion() = default;
virtual bool IsValidAddress(VAddr addr) = 0;
virtual u8 Read8(VAddr addr) = 0;
virtual u16 Read16(VAddr addr) = 0;
virtual u32 Read32(VAddr addr) = 0;