Poke paging. Still a little strange. Removed excess debugging.
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cf30822677
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d342772ed3
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@ -118,6 +118,8 @@ void InitPaging() {
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Allocator = PhysAllocateZeroMem(Size);
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Allocator = CreateAllocatorWithPool(Allocator, Size);
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SerialPrintf("Everything preallocated. Setting up paging.\n");
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KernelAddressSpace = (address_space_t) {
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.Lock = {0},
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.PML4 = PhysAllocateZeroMem(PAGE_SIZE)
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@ -125,6 +127,7 @@ void InitPaging() {
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size_t* Pagetable = KernelAddressSpace.PML4;
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SerialPrintf("About to identity map the higher half.\n");
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// Identity map the higher half
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for(int i = 256; i < 512; i++) {
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Pagetable[i] = (size_t)PhysAllocateZeroMem(PAGE_SIZE);
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@ -132,12 +135,16 @@ void InitPaging() {
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Pagetable[i] |= (PAGE_PRESENT | PAGE_RW);
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}
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SerialPrintf("Identity mapping complete.\n");
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MMapEnt* TopEntry = (MMapEnt*)(((&bootldr) + bootldr.size) - sizeof(MMapEnt));
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size_t LargestAddress = TopEntry->ptr + TopEntry->size;
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SerialPrintf("About to map lower memory into the Direct Region.\n");
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for(size_t Address = 0; Address < AlignUpwards(LargestAddress, PAGE_SIZE); Address += PAGE_SIZE) {
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MapVirtualMemory(&KernelAddressSpace, (size_t*)(((char*)Address) + DIRECT_REGION), Address, MAP_WRITE);
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}
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SerialPrintf("Lower half mapping complete.\n");
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SerialPrintf("Mapping kernel into new memory map.\r\n");
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@ -138,20 +138,20 @@ static directptr_t BuddyAllocate(buddy_t* Buddy, size_t Size) {
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SerialPrintf("Searching for a valid order to allocate into. Condition: {\r\n\tOrder: %d,\r\n\tSize: 0x%x\r\n}\r\n\n", InitialOrder, WantedSize);
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for(int Order = InitialOrder; Order < Buddy->MaxOrder; Order++) {
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SerialPrintf("\tCurrent Order: %d, Buddy entry: %x\r\n", Order, Buddy->List[Order - MIN_ORDER]);
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//SerialPrintf("\tCurrent Order: %d, Buddy entry: %x\r\n", Order, Buddy->List[Order - MIN_ORDER]);
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if(Buddy->List[Order - MIN_ORDER] != 0) {
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SerialPrintf("\t\tFound a valid Order!\r\n");
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SerialPrintf("\tFound a valid Order!\r\n");
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directptr_t Address = Buddy->List[Order - MIN_ORDER];
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Buddy->List[Order - MIN_ORDER] = PEEK(directptr_t, Address);
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TicketUnlock(&Buddy->Lock);
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size_t FoundSize = 1ull << Order;
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SerialPrintf("\t\tAdding area - Address 0x%p, Size 0x%x\r\n\n", Address, FoundSize);
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SerialPrintf("\tAdding area - Address 0x%p, Size 0x%x\r\n\n", Address, FoundSize);
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AddRangeToBuddy(Buddy, (void*)((size_t)Address + WantedSize), FoundSize - WantedSize);
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SerialPrintf("\t\tArea added!\r\n\n");
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SerialPrintf("\tArea added!\r\n\n");
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return Address;
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}
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}
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@ -272,11 +272,15 @@ directptr_t PhysAllocateLowMem(size_t Size) {
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directptr_t PhysAllocateMem(size_t Size) {
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directptr_t Pointer = NULL;
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if(HighBuddy.Base == 0)
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if(HighBuddy.Base == 0) {
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SerialPrintf("Attempting allocation into high memory.\n");
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Pointer = BuddyAllocate(&HighBuddy, Size);
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}
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if(Pointer == NULL)
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if(Pointer == NULL) {
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SerialPrintf("Attempting allocation into low memory.\n");
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Pointer = BuddyAllocate(&LowBuddy, Size);
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}
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ASSERT(Pointer != NULL, "PhysAllocateMem: Unable to allocate memory!");
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