blob: 69b7abc544310c2c797bbe4aec2a0087aa91ada9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
// 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);
backing_addr.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();
backing_addr.shrink_to_fit();
}
} // namespace Common
|
