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[Kernel/Memory] Implement datetime a bit more nicely

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wheremyfoodat 2022-09-24 04:40:43 +03:00
parent 4da023c236
commit c4cb20f846
4 changed files with 17 additions and 5 deletions
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5
include/cpu_dynarmic.hpp
View file

@ -155,6 +155,11 @@ public:
return env.totalTicks;
}
// Get reference to tick count. Memory needs access to this
u64& getTicksRef() {
return env.totalTicks;
}
void runFrame() {
env.ticksLeft = 268111856 / 60;
const auto exitReason = jit->Run();

2
include/emulator.hpp
View file

@ -30,7 +30,7 @@ class Emulator {
public:
Emulator() : window(sf::VideoMode(width, height), "Alber", sf::Style::Default, sf::ContextSettings(0, 0, 0, 4, 3)),
kernel(cpu, memory, gpu), cpu(memory, kernel), gpu(memory) {
kernel(cpu, memory, gpu), cpu(memory, kernel), gpu(memory), memory(cpu.getTicksRef()) {
reset();
window.setActive(true);
}

5
include/memory.hpp
View file

@ -72,6 +72,7 @@ namespace KernelMemoryTypes {
class Memory {
u8* fcram;
u64& cpuTicks; // Reference to the CPU tick counter
// Our dynarmic core uses page tables for reads and writes with 4096 byte pages
std::vector<uintptr_t> readTable, writeTable;
@ -93,13 +94,14 @@ class Memory {
std::bitset<FCRAM_PAGE_COUNT> usedFCRAMPages;
std::optional<u32> findPaddr(u32 size);
u64 timeSince3DSEpoch();
public:
u16 kernelVersion = 0;
u32 usedUserMemory = 0;
std::optional<int> gspMemIndex; // Index of GSP shared mem in lockedMemoryInfo or nullopt if it's already reserved
Memory();
Memory(u64& cpuTicks);
void reset();
void* getReadPointer(u32 address);
void* getWritePointer(u32 address);
@ -118,7 +120,6 @@ public:
u32 getLinearHeapVaddr();
u8* getFCRAM() { return fcram; }
u64 timeSince3DSEpoch();
// Returns whether "addr" is aligned to a page (4096 byte) boundary
static constexpr bool isAligned(u32 addr) {

10
src/core/memory.cpp
View file

@ -6,7 +6,7 @@
using namespace KernelMemoryTypes;
Memory::Memory() {
Memory::Memory(u64& cpuTicks) : cpuTicks(cpuTicks) {
fcram = new uint8_t[FCRAM_SIZE]();
readTable.resize(totalPageCount, 0);
writeTable.resize(totalPageCount, 0);
@ -88,6 +88,12 @@ u32 Memory::read32(u32 vaddr) {
switch (vaddr) {
case ConfigMem::Datetime0: return u32(timeSince3DSEpoch()); // ms elapsed since Jan 1 1900, bottom 32 bits
case ConfigMem::Datetime0 + 4: return u32(timeSince3DSEpoch() >> 32); // top 32 bits
// Ticks since time was last updated. For now we return the current tick count
case ConfigMem::Datetime0 + 8: return u32(cpuTicks);
case ConfigMem::Datetime0 + 12: return u32(cpuTicks >> 32);
case ConfigMem::Datetime0 + 16: return 0xFFB0FF0; // Unknown, set by PTM
case ConfigMem::Datetime0 + 20: case ConfigMem::Datetime0 + 24: case ConfigMem::Datetime0 + 28:
return 0; // Set to 0 by PTM
case ConfigMem::AppMemAlloc: return appResourceLimits.maxCommit;
case 0x1FF81000: return 0; // TODO: Figure out what this config mem address does
@ -360,7 +366,7 @@ void Memory::mapGSPSharedMemory(u32 vaddr, u32 myPerms, u32 otherPerms) {
// Get the number of ms since Jan 1 1900
u64 Memory::timeSince3DSEpoch() {
using namespace std::chrono;
// ms since Jan 1 1970
milliseconds ms = duration_cast<milliseconds>(system_clock::now().time_since_epoch());
// ms between Jan 1 1900 and Jan 1 1970 (2208988800 seconds elapsed between the two)