apic ipis, scheduler stub, crappy and slow tlb shootdown

src/sys/Makefile

@@ -1,5 +1,5 @@
 objects := $(patsubst %.c,%.o,$(wildcard *.c))
-subdirs := mm
+subdirs := mm sched
 OBJPATH=$(OBJDIR)
 export
 

src/sys/sched/Makefile

@@ -0,0 +1,12 @@
+objects := $(patsubst %.c,%.o,$(wildcard *.c))
+subdirs :=
+OBJPATH=$(OBJDIR)
+export
+
+all: $(subdirs) $(objects)
+	for subdir in $(subdirs) ; do $(MAKE) -C $${subdir} ; done
+
+%.o: %.c
+	$(CC) $(CFLAGS) -o $@ $<
+	mkdir -p $(OBJPATH) 
+	cp $@ $(OBJPATH)/$@

src/sys/sched/scheduler.c

@@ -0,0 +1,49 @@
+#include <kernel/sched.h>
+#include <arch/cls.h>
+
+thread_t* queue;
+thread_t* blocked;
+
+static thread_t* next_thread(){
+	
+	thread_t* thread = queue;
+
+	while(1){
+
+		while(thread != NULL && thread->state != THREAD_STATE_WAITING)
+			thread = thread->next;
+
+		if(!thread)
+			asm("hlt"); // wait until something happens that would allow a thread to be scheduled
+	
+	}
+
+	return thread;
+	
+}
+
+__attribute__((noreturn)) static void sched_switch(thread_t* thread){
+	
+	thread_t* current = arch_getcls()->thread;
+
+	if(current->proc != thread->proc){
+
+		// change address spaces and all
+		
+	}
+	
+	arch_switchcontext(thread->regs);
+
+	__builtin_unreachable();
+}
+
+__attribute__((noreturn)) void sched_timerhook(arch_regs* c){
+	
+	thread_t* current = arch_getcls()->thread;
+
+	memcpy(current->regs, c, sizeof(arch_regs));
+	
+	;
+
+	__builtin_unreachable();
+}