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Allocate guest objects in last quarter of memory heap

This commit is contained in:
Gliniak 2022-02-28 14:20:55 +01:00
parent 7be4b7a138
commit af806ee98f
1 changed files with 21 additions and 3 deletions
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24
src/xenia/memory.cc
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@ -553,9 +553,9 @@ uint32_t Memory::SystemHeapAlloc(uint32_t size, uint32_t alignment,
bool is_physical = !!(system_heap_flags & kSystemHeapPhysical); bool is_physical = !!(system_heap_flags & kSystemHeapPhysical);
auto heap = LookupHeapByType(is_physical, 4096); auto heap = LookupHeapByType(is_physical, 4096);
uint32_t address; uint32_t address;
if (!heap->Alloc(size, alignment, if (!heap->AllocSystemHeap(
kMemoryAllocationReserve | kMemoryAllocationCommit, size, alignment, kMemoryAllocationReserve | kMemoryAllocationCommit,
kMemoryProtectRead | kMemoryProtectWrite, false, &address)) { kMemoryProtectRead | kMemoryProtectWrite, false, &address)) {
return 0; return 0;
} }
Zero(address, size); Zero(address, size);
@ -1059,6 +1059,24 @@ bool BaseHeap::AllocRange(uint32_t low_address, uint32_t high_address,
return true; return true;
} }
bool BaseHeap::AllocSystemHeap(uint32_t size, uint32_t alignment,
uint32_t allocation_type, uint32_t protect,
bool top_down, uint32_t* out_address) {
*out_address = 0;
size = xe::round_up(size, page_size_);
alignment = xe::round_up(alignment, page_size_);
uint32_t low_address = heap_base_;
if (heap_type_ == xe::HeapType::kGuestVirtual) {
// Both virtual heaps are same size, so we can assume that we substract
// constant value.
low_address = heap_base_ + heap_size_ - 0x10000000;
}
uint32_t high_address = heap_base_ + (heap_size_ - 1);
return AllocRange(low_address, high_address, size, alignment, allocation_type,
protect, top_down, out_address);
}
bool BaseHeap::Decommit(uint32_t address, uint32_t size) { bool BaseHeap::Decommit(uint32_t address, uint32_t size) {
uint32_t page_count = get_page_count(size, page_size_); uint32_t page_count = get_page_count(size, page_size_);
uint32_t start_page_number = (address - heap_base_) / page_size_; uint32_t start_page_number = (address - heap_base_) / page_size_;