1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
#include <common.h>
#include <MemoryManager/PhysMem.ns.h>
#include <MemoryManager/Heap.class.h>
namespace Mem {
bool pagingEnabled = false;
u32int placementAddress;
Heap kheap;
//Placement malloc, used while heap is not initialized
void *kallocInternal(u32int sz, bool align) {
if (kheap.usable()) return 0;
if (align && (placementAddress & 0xFFFFF000)) {
placementAddress &= 0xFFFFF000;
placementAddress += 0x1000;
}
u32int temp = placementAddress;
placementAddress += sz;
for (u32int i = temp; i < placementAddress; i += 0x1000) {
if (pagingEnabled) kernelPageDirectory->allocFrame(i, false, false);
}
return (void*)temp;
}
//***************************************************************************
//*** MEMORY MANAGMENT FUNCTIONS ***
//***************************************************************************
void createHeap() {
u32int heapIndexSize = PhysMem::total() * 64 + 0x10000;
u32int heapStart = (placementAddress & 0xFFFFF000) + 0x10000; //Set initial heap start
u32int heapSize = HEAP_MIN_SIZE + heapIndexSize; //Calculate heap size
for (u32int i = (placementAddress & 0xFFFFF000); i < heapStart; i += 0x1000) {
kernelPageDirectory->allocFrame(i, false, false);
}
kheap.create(heapStart, heapSize, heapIndexSize, kernelPageDirectory, false, false);
}
void *kalloc(u32int sz, bool align) {
if (!kheap.usable()) return kallocInternal(sz, align);
if (align) return 0;
return kheap.alloc(sz);
}
void kfree(void *ptr) {
kheap.free(ptr);
}
u32int kheapSize() {
return kheap.size();
}
u32int kheapFree() {
return kheap.free();
}
}
|
