diff options
Diffstat (limited to 'src/common/page_table.cpp')
| -rw-r--r-- | src/common/page_table.cpp | 34 |
1 files changed, 9 insertions, 25 deletions
diff --git a/src/common/page_table.cpp b/src/common/page_table.cpp index 566b57b62..e5d3090d5 100644 --- a/src/common/page_table.cpp +++ b/src/common/page_table.cpp @@ -6,36 +6,20 @@ namespace Common { -PageTable::PageTable(std::size_t page_size_in_bits) : page_size_in_bits{page_size_in_bits} {} +PageTable::PageTable() = default; 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); - +void PageTable::Resize(std::size_t address_space_width_in_bits, std::size_t page_size_in_bits, + bool has_attribute) { + 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(); -} - -BackingPageTable::BackingPageTable(std::size_t page_size_in_bits) : PageTable{page_size_in_bits} {} - -BackingPageTable::~BackingPageTable() = default; - -void BackingPageTable::Resize(std::size_t address_space_width_in_bits) { - PageTable::Resize(address_space_width_in_bits); - const std::size_t num_page_table_entries = 1ULL - << (address_space_width_in_bits - page_size_in_bits); backing_addr.resize(num_page_table_entries); - backing_addr.shrink_to_fit(); + + if (has_attribute) { + attributes.resize(num_page_table_entries); + } } } // namespace Common |