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[Zion] Move to a kernel slab allocator that will allow easier dealloc.

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This commit is contained in:
Drew Galbraith 2023-11-15 12:03:42 -08:00
parent 792e5155ba
commit d71d543b2a
6 changed files with 141 additions and 109 deletions
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35
zion/memory/kernel_heap.cpp
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@ -15,23 +15,26 @@ KernelHeap& GetKernelHeap() {
}
return *gKernelHeap;
}
static uint8_t kNewByte = 0xAB;
void InitMemory(uint8_t* addr, uint64_t size) {
for (uint64_t i = 0; i < size; i++) {
addr[i] = kNewByte;
}
}
} // namespace
KernelHeap::KernelHeap(uint64_t lower_bound, uint64_t upper_bound)
: next_slab_addr_(lower_bound),
first_unsized_addr_(lower_bound + (upper_bound - lower_bound) / 2),
next_addr_(first_unsized_addr_),
upper_bound_(upper_bound) {
: next_addr_(lower_bound), upper_bound_(upper_bound) {
gKernelHeap = this;
}
void KernelHeap::InitializeSlabAllocators() {
slab_8_ = glcr::MakeUnique<SlabAllocator<8>>(next_slab_addr_, 4);
next_slab_addr_ += 0x4000;
slab_16_ = glcr::MakeUnique<SlabAllocator<16>>(next_slab_addr_, 6);
next_slab_addr_ += 0x6000;
slab_32_ = glcr::MakeUnique<SlabAllocator<32>>(next_slab_addr_, 6);
next_slab_addr_ += 0x6000;
slab_8_ = glcr::MakeUnique<SlabAllocator>(8);
slab_16_ = glcr::MakeUnique<SlabAllocator>(16);
slab_32_ = glcr::MakeUnique<SlabAllocator>(32);
}
void* KernelHeap::Allocate(uint64_t size) {
@ -106,8 +109,16 @@ void KernelHeap::RecordSize(uint64_t size) {
distributions[index]++;
}
void* operator new(uint64_t size) { return GetKernelHeap().Allocate(size); }
void* operator new[](uint64_t size) { return GetKernelHeap().Allocate(size); }
void* operator new(uint64_t size) {
void* addr = GetKernelHeap().Allocate(size);
InitMemory(static_cast<uint8_t*>(addr), size);
return addr;
}
void* operator new[](uint64_t size) {
void* addr = GetKernelHeap().Allocate(size);
InitMemory(static_cast<uint8_t*>(addr), size);
return addr;
}
void operator delete(void*, uint64_t size) {}
void operator delete[](void*) {}