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Kernel: Implement software context switching and Processor structure

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Moving certain globals into a new Processor structure for
each CPU allows us to eventually run an instance of the
scheduler on each CPU.
This commit is contained in:
Tom 2020-06-27 13:42:28 -06:00 • committed by Andreas Kling
parent 10407061d2
commit fb41d89384
22 changed files with 1002 additions and 513 deletions
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14
Kernel/Scheduler.h
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@ -43,28 +43,25 @@ struct SchedulerData;
extern Thread* g_finalizer;
extern Thread* g_colonel;
extern WaitQueue* g_finalizer_wait_queue;
extern bool g_finalizer_has_work;
extern Atomic<bool> g_finalizer_has_work;
extern u64 g_uptime;
extern SchedulerData* g_scheduler_data;
extern timeval g_timeofday;
class Scheduler {
public:
static void initialize();
static void initialize(u32 cpu);
static void timer_tick(const RegisterState&);
[[noreturn]] static void start();
static bool pick_next();
static timeval time_since_boot();
static void pick_next_and_switch_now();
static void switch_now();
static bool yield();
static bool donate_to(Thread*, const char* reason);
static bool context_switch(Thread&);
static void prepare_to_modify_tss(Thread&);
static Process* colonel();
static bool is_active();
static void beep();
static void idle_loop();
static void stop_idling();
static void invoke_async();
template<typename Callback>
static inline IterationDecision for_each_runnable(Callback);
@ -74,9 +71,6 @@ public:
static void init_thread(Thread& thread);
static void update_state_for_thread(Thread& thread);
private:
static void prepare_for_iret_to_new_process();
};
}