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Minor adjustments to the allocator

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This commit is contained in:
Curle 2021-06-16 22:57:07 +01:00
parent 28a29ecdff
commit da81dfc597
Signed by: TheCurle
GPG Key ID: 5942F13718443F79
2 changed files with 11 additions and 15 deletions
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2
src/system/memory/liballoc.c
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@ -46,7 +46,7 @@ static void liballoc_unlock() {
* \return A pointer to the allocated memory.
*/
static void* liballoc_alloc(size_t count) {
return (void*) PhysAllocateMem(count * PAGE_SIZE);
return (void*) PhysAllocateZeroMem(count * PAGE_SIZE);
}
/** This frees previously allocated memory. The void* parameter passed

24
src/system/memory/physmem.c
View File

@ -26,7 +26,6 @@
#define MIN_ORDER 3
#define PEEK(type, address) (*((volatile type*)(address)))
uint8_t* Memory = ((uint8_t*)(&memstart));
uint8_t* MemoryStart;
size_t MemoryBuckets;
@ -58,18 +57,10 @@ static void AddToBuddyList(buddy_t* Buddy, directptr_t Address, size_t Order, bo
//SerialPrintf("Adding new entry to buddy: Address 0x%p with order %d, New Entry is %s\r\n", Address, Order, NewEntry ? "true" : "false");
/*
SerialPrintf("About to poke memory..\r\n");
PEEK(directptr_t, Address) = 0;
SerialPrintf("Did it work?\r\n");
*/
size_t Size = 1ull << Order;
TicketAttemptLock(&Buddy->Lock);
//SerialPrintf("Ticketlock engaged\r\n");
if(!NewEntry && ListHead != 0) {
directptr_t ListPrevious = 0;
@ -93,18 +84,14 @@ static void AddToBuddyList(buddy_t* Buddy, directptr_t Address, size_t Order, bo
ListHead = PEEK(directptr_t, ListHead);
}
} else {
//SerialPrintf("\tAbout to poke memory 0x%p - current value is 0x%x\r\n", Address, *((size_t*)(Address)));
*((size_t*)(Address)) = (size_t) ListHead;
Buddy->List[Order - MIN_ORDER] = Address;
}
TicketUnlock(&Buddy->Lock);
//SerialPrintf("Ticketlock Released.\r\n");
}
static void AddRangeToBuddy(buddy_t* Buddy, directptr_t Base, size_t Size) {
//SerialPrintf("Starting a new range addition.\r\n\t");
while(Size > (1ull << MIN_ORDER)) {
//SerialPrintf("New iteration. Current Size: 0x%x\r\n\t", Size);
for(int Order = Buddy->MaxOrder - 1; Order >= MIN_ORDER; Order--) {
@ -234,14 +221,23 @@ void ListMemoryMap() {
}
void AddRangeToPhysMem(directptr_t Base, size_t Size) {
if(Base < (void*)(LOWER_REGION + DIRECT_REGION)) {
if(Base + Size < (void*)(LOWER_REGION)) {
SerialPrintf("[ Mem] New range in lower memory: 0x%p, size 0x%x\r\n", Base, Size);
AddRangeToBuddy(&LowBuddy, Base, Size);
} else {
if(Base < (void*)(LOWER_REGION)) {
size_t difference = (size_t) LOWER_REGION - (size_t) Base;
SerialPrintf("[ Mem] Base is 0x%p bytes away from the threshold, allocating 0x%p-0x%p to lower memory..\r\n", difference, Base, Base + difference);
AddRangeToBuddy(&LowBuddy, Base, difference);
Base = (void*) LOWER_REGION;
Size = Size - difference;
}
if(HighBuddy.Base == NULL) {
HighBuddy.Base = Base;
}
SerialPrintf("[ Mem] New range in higher memory: 0x%p, size 0x%x\r\n", Base, Size);
AddRangeToBuddy(&HighBuddy, Base, Size);
}