mirror of
https://github.com/open-goal/jak-project
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water111
139 lines
3.3 KiB
C++
139 lines
3.3 KiB
C++
/*!
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* @file vm.cpp
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* Base "PS2 virtual machine" code.
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* Simulates the existence of select PS2 components, for inspection & debugging.
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* Not an emulator!
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*/
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#include "vm.h"
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#include "dmac.h"
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#include "common/log/log.h"
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#include "game/kernel/kscheme.h"
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#include <condition_variable>
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#include <mutex>
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namespace VM {
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bool use = true; // enable VM by default, since we're debugging right now
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namespace {
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Status status;
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std::condition_variable vm_init_cv;
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std::condition_variable vm_dead_cv;
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std::mutex status_mutex;
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int components = 0;
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} // namespace
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static void vm_change_status(Status new_status) {
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std::unique_lock<std::mutex> lk(status_mutex);
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status = new_status;
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}
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void wait_vm_init() {
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std::unique_lock<std::mutex> lk(status_mutex);
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vm_init_cv.wait(lk, [&] { return status == Status::Inited; });
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}
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void wait_vm_dead() {
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if (status != Status::Kill && status != Status::Dead) {
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lg::warn("[VM] Dying without being killed! There are {} component(s) running", components);
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}
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std::unique_lock<std::mutex> lk(status_mutex);
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vm_dead_cv.wait(lk, [&] { return components == 0; });
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}
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bool vm_want_exit() {
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return status == Status::Kill || status == Status::Dead;
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}
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void vm_prepare() {
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lg::debug("[VM] Preparing...");
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vm_change_status(Status::Uninited);
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lg::debug("[VM] Prepared");
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}
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void vm_init() {
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if (status != Status::Uninited) {
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lg::warn("[VM] unexpected status {}", status);
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}
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lg::debug("[VM] Inited");
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vm_change_status(Status::Inited);
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vm_init_cv.notify_all();
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}
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void vm_kill() {
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lg::debug("[VM] Killing");
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vm_change_status(Status::Kill);
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// stall caller until VM is done dying
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wait_vm_dead();
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vm_change_status(Status::Dead);
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}
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void subscribe_component() {
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if (status == Status::Dead) {
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throw std::runtime_error("[VM] Cannot add new components when VM is dead!");
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}
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status_mutex.lock();
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++components;
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status_mutex.unlock();
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// stall component until VM is ready
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if (status == Status::Uninited) {
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wait_vm_init();
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}
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}
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void unsubscribe_component() {
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status_mutex.lock();
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--components;
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status_mutex.unlock();
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vm_dead_cv.notify_all();
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}
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/*!
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* Return the GOAL pointer to a specified PS2 VM component based on the EE address.
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*/
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u64 get_vm_ptr(u32 ptr) {
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// currently, only DMAC and DMA channel banks are implemented. add more as necessary.
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if (ptr == 0x10008000) {
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return VM::dmac_ch[0].offset;
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} else if (ptr == 0x10009000) {
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return VM::dmac_ch[1].offset;
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} else if (ptr == 0x1000a000) {
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return VM::dmac_ch[2].offset;
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} else if (ptr == 0x1000b000) {
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return VM::dmac_ch[3].offset;
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} else if (ptr == 0x1000b400) {
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return VM::dmac_ch[4].offset;
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} else if (ptr == 0x1000c000) {
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return VM::dmac_ch[5].offset;
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} else if (ptr == 0x1000c400) {
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return VM::dmac_ch[6].offset;
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} else if (ptr == 0x1000c800) {
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return VM::dmac_ch[7].offset;
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} else if (ptr == 0x1000d000) {
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return VM::dmac_ch[8].offset;
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} else if (ptr == 0x1000d400) {
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return VM::dmac_ch[9].offset;
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} else if (ptr == 0x1000e000) {
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return VM::dmac.offset;
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} else {
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// return zero, using this result will segfault GOAL!
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// we could die immediately, but it might be worth it to keep going just on the off chance more
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// errors are reported, and not just only this one.
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lg::error("unknown EE register for VM at #x{:08x}", ptr);
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return 0;
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}
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}
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} // namespace VM
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