From 93da8e0abfcdcc6e3cb5488a0db12373429f1377 Mon Sep 17 00:00:00 2001 From: bunnei Date: Sat, 2 Mar 2019 15:20:28 -0500 Subject: core: Move PageTable struct into Common. --- src/common/page_table.cpp | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 src/common/page_table.cpp (limited to 'src/common/page_table.cpp') diff --git a/src/common/page_table.cpp b/src/common/page_table.cpp new file mode 100644 index 000000000..8eba1c3f1 --- /dev/null +++ b/src/common/page_table.cpp @@ -0,0 +1,29 @@ +// 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 -- cgit v1.2.3