initial commitHEADmaster

1 files changed, 99 insertions, 0 deletions

diff --git a/src/Userspace.cpp b/src/Userspace.cpp
new file mode 100644
index 0000000..0dc2425
--- /dev/null
+++ b/src/Userspace.cpp
@@ -0,0 +1,99 @@
+#include "Userspace.h"
+
+#include "Bus.h"
+#include "RAM.h"
+
+#include <thread>
+
+Userspace::Userspace() : m_RAM(std::make_shared<RAM>()), m_ProgramMemory(std::make_shared<RAM>()), m_Bus(std::make_shared<Bus>(m_RAM)), m_CPU(m_Bus) {
+  std::cout << "[Userspace] Emulation started." << std::endl;
+  m_ApplicationRunning = true;
+  m_Status = SystemStatus::STOPPED;
+}
+
+void Userspace::Upload2Memory(uint8_t bytes[], size_t len) {
+  m_ProgramMemoryLen = len;
+  std::memcpy(m_RAM->Data(), bytes, len);
+  std::memcpy(m_ProgramMemory->Data(), bytes, len);
+}
+
+uint8_t* Userspace::RetrieveMemory() {
+  return m_RAM->Data();
+}
+
+void Userspace::Run() {
+  while(m_ApplicationRunning) {
+    EmulatorLoop();
+  }
+}
+
+void Userspace::StepCPU() {
+  try {
+    m_CPU.Step();
+  } catch (CPUException& c) {
+    m_Status = SystemStatus::EXCEPTION;
+    m_ExceptionMessages.push_back(c.GetMessage());
+  }
+}
+
+void Userspace::EmulatorLoop() {
+  while(m_Status == SystemStatus::RUNNING) {
+    if(!m_CPU.IsHalted()) {
+      StepCPU();
+    }
+
+    if (m_CPU.IsHalted()) {
+      if(m_Status == SystemStatus::RUNNING)
+	m_Status = SystemStatus::STOPPED;
+      std::this_thread::sleep_for(std::chrono::milliseconds(10));
+    }
+  }
+  if(m_Status == SystemStatus::STOPPED)
+    std::this_thread::sleep_for(std::chrono::milliseconds(10));
+}
+
+void Userspace::Reset() {
+  if(m_CPU.IsHalted()) m_Status = SystemStatus::STOPPED;
+  m_CPU.Reset();
+  std::memcpy(m_RAM->Data(), m_ProgramMemory->Data(), m_ProgramMemoryLen);
+  m_ExceptionMessages.clear();
+}
+
+void Userspace::Start() {
+  m_Status = SystemStatus::RUNNING;
+}
+
+void Userspace::Step() {
+  if(!m_CPU.IsHalted())
+  {
+    StepCPU();
+    std::cout << "[Userspace] CPU stepped!" << std::endl;
+  }
+  else
+  {
+    std::cout << "[Userspace] CPU is halted! Cannot step." << std::endl;
+  }
+}
+
+void Userspace::Stop() {
+  m_Status = SystemStatus::STOPPED;
+  std::cout << "[Userspace] Emulation stopped." << std::endl;
+}
+
+void Userspace::Exit() {
+  m_Status = SystemStatus::STOPPED;
+  m_ApplicationRunning = false;
+  std::cout << "[Userspace] Emulation exited." << std::endl;
+}
+
+SystemStatus Userspace::GetSystemStatus() {
+  return m_Status;
+}
+
+CPUStatus Userspace::GetCPUStatus() {
+  return m_CPU.GetStatus();
+}
+
+std::vector<std::string>& Userspace::GetException() {
+  return m_ExceptionMessages;
+}