Mirrors/yuzu
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

memory: Dehardcode the use of a 36-bit address space

Browse source 
Given games can also request a 32-bit or 39-bit address space, we
shouldn't be hardcoding the address space range as 36-bit.
This commit is contained in:
Lioncash 2018-09-24 10:29:56 -04:00
parent 75603b005b
commit 7fd598636e
6 changed files with 63 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/core/memory.cpp
View file

@ -3,7 +3,6 @@
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <cstring>
#include <utility>
@ -41,6 +40,21 @@ PageTable* GetCurrentPageTable() {
return current_page_table;
}
PageTable::PageTable() = default;
PageTable::PageTable(std::size_t address_space_width_in_bits) {
Resize(address_space_width_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_BITS);
pointers.resize(num_page_table_entries);
attributes.resize(num_page_table_entries);
}
static void MapPages(PageTable& page_table, VAddr base, u64 size, u8* memory, PageType type) {
LOG_DEBUG(HW_Memory, "Mapping {} onto {:016X}-{:016X}", fmt::ptr(memory), base * PAGE_SIZE,
(base + size) * PAGE_SIZE);
@ -50,7 +64,7 @@ static void MapPages(PageTable& page_table, VAddr base, u64 size, u8* memory, Pa
VAddr end = base + size;
while (base != end) {
ASSERT_MSG(base < PAGE_TABLE_NUM_ENTRIES, "out of range mapping at {:016X}", base);
ASSERT_MSG(base < page_table.pointers.size(), "out of range mapping at {:016X}", base);
page_table.attributes[base] = type;
page_table.pointers[base] = memory;