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kern: implement KMemoryManager init

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This commit is contained in:
Michael Scire
2020-02-06 17:40:57 -08:00
parent 1de607c183
commit f7d3d50f33
9 changed files with 283 additions and 9 deletions
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28
libraries/libmesosphere/source/kern_k_page_heap.cpp
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@@ -17,10 +17,36 @@
namespace ams::kern {
void KPageHeap::Initialize(KVirtualAddress address, size_t size, KVirtualAddress metadata_address, size_t metadata_size, const size_t *block_shifts, size_t num_block_shifts) {
/* Check our assumptions. */
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(address), PageSize));
MESOSPHERE_ASSERT(util::IsAligned(size, PageSize));
MESOSPHERE_ASSERT(0 < num_block_shifts && num_block_shifts <= NumMemoryBlockPageShifts);
const KVirtualAddress metadata_end = metadata_address + metadata_size;
/* Set our members. */
this->heap_address = address;
this->heap_size = size;
this->num_blocks = num_block_shifts;
/* Setup bitmaps. */
u64 *cur_bitmap_storage = GetPointer<u64>(metadata_address);
for (size_t i = 0; i < num_block_shifts; i++) {
const size_t cur_block_shift = block_shifts[i];
const size_t next_block_shift = (i != num_block_shifts - 1) ? block_shifts[i + 1] : 0;
cur_bitmap_storage = this->blocks[i].Initialize(this->heap_address, this->heap_size, cur_block_shift, next_block_shift, cur_bitmap_storage);
}
/* Ensure we didn't overextend our bounds. */
MESOSPHERE_ABORT_UNLESS(KVirtualAddress(cur_bitmap_storage) <= metadata_end);
}
size_t KPageHeap::CalculateMetadataOverheadSize(size_t region_size, const size_t *block_shifts, size_t num_block_shifts) {
size_t overhead_size = 0;
for (size_t i = 0; i < num_block_shifts; i++) {
overhead_size += KPageHeap::Block::CalculateMetadataOverheadSize(region_size, block_shifts[i], (i != num_block_shifts - 1) ? block_shifts[i + 1] : 0);
const size_t cur_block_shift = block_shifts[i];
const size_t next_block_shift = (i != num_block_shifts - 1) ? block_shifts[i + 1] : 0;
overhead_size += KPageHeap::Block::CalculateMetadataOverheadSize(region_size, cur_block_shift, next_block_shift);
}
return util::AlignUp(overhead_size, PageSize);
}