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kern: implement more of KMemoryManager through KPageBuffer slab init

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This commit is contained in:
Michael Scire 2020-02-06 20:36:26 -08:00
parent f7d3d50f33
commit d9e6771e63
8 changed files with 418 additions and 13 deletions
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20
libraries/libmesosphere/source/init/kern_init_slab_setup.cpp
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@ -135,6 +135,26 @@ namespace ams::kern::init {
return size;
}
void InitializeKPageBufferSlabHeap() {
const auto &counts = GetSlabResourceCounts();
const size_t num_pages = counts.num_KProcess + counts.num_KThread + (counts.num_KProcess + counts.num_KThread) / 8;
const size_t slab_size = num_pages * PageSize;
/* Reserve memory from the system resource limit. */
MESOSPHERE_ABORT_UNLESS(Kernel::GetSystemResourceLimit().Reserve(ams::svc::LimitableResource_PhysicalMemoryMax, slab_size));
/* Allocate memory for the slab. */
constexpr auto AllocateOption = KMemoryManager::EncodeOption(KMemoryManager::Pool_System, KMemoryManager::Direction_FromFront);
const KVirtualAddress slab_address = Kernel::GetMemoryManager().AllocateContinuous(num_pages, 1, AllocateOption);
MESOSPHERE_ABORT_UNLESS(slab_address != Null<KVirtualAddress>);
/* Open references to the slab. */
Kernel::GetMemoryManager().Open(slab_address, num_pages);
/* Initialize the slabheap. */
KPageBuffer::InitializeSlabHeap(GetVoidPointer(slab_address), slab_size);
}
void InitializeSlabHeaps() {
/* Get the start of the slab region, since that's where we'll be working. */
KVirtualAddress address = KMemoryLayout::GetSlabRegionAddress();