30 lines
1.1 KiB
C++
30 lines
1.1 KiB
C++
|
// Copyright 2019 yuzu Emulator Project
|
||
|
|
// Licensed under GPLv2 or any later version
|
||
|
|
// Refer to the license.txt file included.
|
||
|
|
|
||
|
|
#include "common/page_table.h"
|
||
|
|
|
||
|
|
namespace Common {
|
||
|
|
|
||
|
|
PageTable::PageTable(std::size_t page_size_in_bits) : page_size_in_bits{page_size_in_bits} {}
|
||
|
|
|
||
|
|
PageTable::~PageTable() = default;
|
||
|
|
|
||
|
|
void PageTable::Resize(std::size_t address_space_width_in_bits) {
|
||
|
|
const std::size_t num_page_table_entries = 1ULL
|
||
|
|
<< (address_space_width_in_bits - page_size_in_bits);
|
||
|
|
|
||
|
|
pointers.resize(num_page_table_entries);
|
||
|
|
attributes.resize(num_page_table_entries);
|
||
|
|
|
||
|
|
// The default is a 39-bit address space, which causes an initial 1GB allocation size. If the
|
||
|
|
// vector size is subsequently decreased (via resize), the vector might not automatically
|
||
|
|
// actually reallocate/resize its underlying allocation, which wastes up to ~800 MB for
|
||
|
|
// 36-bit titles. Call shrink_to_fit to reduce capacity to what's actually in use.
|
||
|
|
|
||
|
|
pointers.shrink_to_fit();
|
||
|
|
attributes.shrink_to_fit();
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace Common
|