Initial source

1 files changed, 305 insertions, 0 deletions

diff --git a/kern/startup.c b/kern/startup.c
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+++ b/kern/startup.c
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	Mach kernel startup.
+ */
+
+
+#include <xpr_debug.h>
+#include <cpus.h>
+#include <mach_host.h>
+#include <norma_ipc.h>
+#include <norma_vm.h>
+
+#include <mach/boolean.h>
+#include <mach/machine.h>
+#include <mach/task_special_ports.h>
+#include <mach/vm_param.h>
+#include <ipc/ipc_init.h>
+#include <kern/cpu_number.h>
+#include <kern/processor.h>
+#include <kern/sched_prim.h>
+#include <kern/task.h>
+#include <kern/thread.h>
+#include <kern/thread_swap.h>
+#include <kern/time_out.h>
+#include <kern/timer.h>
+#include <kern/zalloc.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_map.h>
+#include <vm/vm_object.h>
+#include <vm/vm_page.h>
+#include <machine/machspl.h>
+#include <machine/pmap.h>
+#include <mach/version.h>
+
+
+
+extern void	vm_mem_init();
+extern void	vm_mem_bootstrap();
+extern void	init_timeout();
+extern void	machine_init();
+
+extern void	idle_thread();
+extern void	vm_pageout();
+extern void	reaper_thread();
+extern void	swapin_thread();
+extern void	sched_thread();
+
+extern void	bootstrap_create();
+extern void	device_service_create();
+
+void cpu_launch_first_thread();		/* forward */
+void start_kernel_threads();	/* forward */
+
+#if	NCPUS > 1
+extern void	start_other_cpus();
+extern void	action_thread();
+#endif	NCPUS > 1
+
+/* XX */
+extern vm_offset_t phys_first_addr, phys_last_addr;
+
+/*
+ *	Running in virtual memory, on the interrupt stack.
+ *	Does not return.  Dispatches initial thread.
+ *
+ *	Assumes that master_cpu is set.
+ */
+void setup_main()
+{
+	thread_t		startup_thread;
+
+	panic_init();
+	printf_init();
+
+	sched_init();
+	vm_mem_bootstrap();
+	ipc_bootstrap();
+	vm_mem_init();
+	ipc_init();
+
+	/*
+	 * As soon as the virtual memory system is up, we record
+	 * that this CPU is using the kernel pmap.
+	 */
+	PMAP_ACTIVATE_KERNEL(master_cpu);
+
+	init_timers();
+	init_timeout();
+
+#if	XPR_DEBUG
+	xprbootstrap();
+#endif	XPR_DEBUG
+
+	timestamp_init();
+
+	mapable_time_init();
+
+	machine_init();
+
+	machine_info.max_cpus = NCPUS;
+	machine_info.memory_size = phys_last_addr - phys_first_addr; /* XXX mem_size */
+	machine_info.avail_cpus = 0;
+	machine_info.major_version = KERNEL_MAJOR_VERSION;
+	machine_info.minor_version = KERNEL_MINOR_VERSION;
+
+	/*
+	 *	Initialize the IPC, task, and thread subsystems.
+	 */
+	task_init();
+	thread_init();
+	swapper_init();
+#if	MACH_HOST
+	pset_sys_init();
+#endif	MACH_HOST
+
+	/*
+	 *	Kick off the time-out driven routines by calling
+	 *	them the first time.
+	 */
+	recompute_priorities();
+	compute_mach_factor();
+	
+	/*
+	 *	Create a kernel thread to start the other kernel
+	 *	threads.  Thread_resume (from kernel_thread) calls
+	 *	thread_setrun, which may look at current thread;
+	 *	we must avoid this, since there is no current thread.
+	 */
+
+	/*
+	 * Create the thread, and point it at the routine.
+	 */
+	(void) thread_create(kernel_task, &startup_thread);
+	thread_start(startup_thread, start_kernel_threads);
+
+	/*
+	 * Give it a kernel stack.
+	 */
+	thread_doswapin(startup_thread);
+
+	/*
+	 * Pretend it is already running, and resume it.
+	 * Since it looks as if it is running, thread_resume
+	 * will not try to put it on the run queues.
+	 *
+	 * We can do all of this without locking, because nothing
+	 * else is running yet.
+	 */
+	startup_thread->state |= TH_RUN;
+	(void) thread_resume(startup_thread);
+
+	/*
+	 * Start the thread.
+	 */
+	cpu_launch_first_thread(startup_thread);
+	/*NOTREACHED*/
+}
+
+/*
+ * Now running in a thread.  Create the rest of the kernel threads
+ * and the bootstrap task.
+ */
+void start_kernel_threads()
+{
+	register int	i;
+
+	/*
+	 *	Create the idle threads and the other
+	 *	service threads.
+	 */
+	for (i = 0; i < NCPUS; i++) {
+	    if (machine_slot[i].is_cpu) {
+		thread_t	th;
+
+		(void) thread_create(kernel_task, &th);
+		thread_bind(th, cpu_to_processor(i));
+		thread_start(th, idle_thread);
+		thread_doswapin(th);
+		(void) thread_resume(th);
+	    }
+	}
+
+	(void) kernel_thread(kernel_task, reaper_thread, (char *) 0);
+	(void) kernel_thread(kernel_task, swapin_thread, (char *) 0);
+	(void) kernel_thread(kernel_task, sched_thread, (char *) 0);
+
+#if	NCPUS > 1
+	/*
+	 *	Create the shutdown thread.
+	 */
+	(void) kernel_thread(kernel_task, action_thread, (char *) 0);
+
+	/*
+	 *	Allow other CPUs to run.
+	 */
+	start_other_cpus();
+#endif	NCPUS > 1
+
+	/*
+	 *	Create the device service.
+	 */
+	device_service_create();
+
+	/*
+	 *	Initialize NORMA ipc system.
+	 */
+#if	NORMA_IPC
+	norma_ipc_init();
+#endif	NORMA_IPC
+
+	/*
+	 *	Initialize NORMA vm system.
+	 */
+#if	NORMA_VM
+	norma_vm_init();
+#endif	NORMA_VM
+
+	/*
+	 *	Start the user bootstrap.
+	 */
+	bootstrap_create();
+
+#if	XPR_DEBUG
+	xprinit();		/* XXX */
+#endif	XPR_DEBUG
+
+	/*
+	 *	Become the pageout daemon.
+	 */
+	(void) spl0();
+	vm_pageout();
+	/*NOTREACHED*/
+}
+
+#if	NCPUS > 1
+void slave_main()
+{
+	cpu_launch_first_thread(THREAD_NULL);
+}
+#endif	NCPUS > 1
+
+/*
+ *	Start up the first thread on a CPU.
+ *	First thread is specified for the master CPU.
+ */
+void cpu_launch_first_thread(th)
+	register thread_t	th;
+{
+	register int	mycpu;
+
+	mycpu = cpu_number();
+
+	cpu_up(mycpu);
+
+	start_timer(&kernel_timer[mycpu]);
+
+	/*
+	 * Block all interrupts for choose_thread.
+	 */
+	(void) splhigh();
+
+	if (th == THREAD_NULL)
+	    th = choose_thread(cpu_to_processor(mycpu));
+	if (th == THREAD_NULL)
+	    panic("cpu_launch_first_thread");
+
+	startrtclock();		/* needs an active thread */
+	PMAP_ACTIVATE_KERNEL(mycpu);
+
+	active_threads[mycpu] = th;
+	active_stacks[mycpu] = th->kernel_stack;
+	thread_lock(th);
+	th->state &= ~TH_UNINT;
+	thread_unlock(th);
+	timer_switch(&th->system_timer);
+
+	PMAP_ACTIVATE_USER(vm_map_pmap(th->task->map), th, mycpu);
+
+	load_context(th);
+	/*NOTREACHED*/
+}