changelog

开放源码实时操作系统源码.

		changed in the future.

		* src/sched/mlqueue.cxx:
		Added local set_need_reschedule() function to set the
		need_reschedule flag on a suitable CPU.
		Many more changes to cope with SMP systems.
		NOTE: This code has all become somthing of a mess, it need to be
		tidied up and the SMP-specific changes integrated better into the
		code. Also, timesliceing currently only works on the CPU that
		takes clock interrupts - this needs fixing.

		* src/common/thread.cxx:
		Moved assignment of initial current thread to here from sched.cxx.

		* include/smp.hxx:
		Changed CYG_KERNEL_CPU_INTERRUPT()
		CYG_KERNEL_CPU_RESCHEDULE_INTERRUPT() since there may be other
		interrupt types to worry about.
		Added annotations to scheduler data items.

		* include/sched.hxx:
		Split set_current_thread() into two functions, the original works
		only on the current CPU, the new one sets another CPU's current
		thread. This latter function is only used to prime the current
		threads during initialization.
		Added second need_reschedule() function that takes a thread
		argument. This is intended to be overridden by a scheduler
		specific function that sets the need_reschedule flag if the
		supplied thread is more deserving of CPU time that any current
		thread.

		* include/mlqueue.hxx:
		Made cyg_scheduler_set_need_reschedule() a friend of
		Cyg_Scheduler_Implementation class.
		Added override set_need_reschedule() functions.

		* include/kapidata.h: Added cpu field to cyg_thread structure when
		in SMP systems.

		* include/intr.hxx:
		* src/intr/intr.cxx:
		Added Cyg_Interrupt::set_cpu() and Cyg_Interrupt::get_cpu() for
		SMP systems.

		* include/instrmnt.h: Added events for INTR_GET_CPU and
		INTR_SET_CPU.

	2001-05-29  Nick Garnett  <[e-mail]>

		The following changes were all imported from the SMP branch:

		* tests/tm_basic.cxx:
		Modified to work in SMP configuration - mostly at present by
		ifdeffing out code I didn't want to fix.

		* include/sched.hxx:
		Moved scheduler lock operation into Cyg_Scheduler_SchedLock class.
		Converted current_thread, need_reschedule, and thread_switches
		into CPU indexed arrays. Added member functions to get and set
		these indirectly.
		Added start_cpu() to do per-CPU scheduler startup.

		* include/sched.inl:
		Converted scheduler lock/unlock functions to use new schedlock
		class.

		* src/sched/sched.cxx:
		Changed in line with sched.hxx.
		Added call to requeue() in unlock_inner() to restore current
		thread to run queue if necessary.	
		Moved most of scheduler startup to Cyg_Scheduler::start_cpu().
		Cyg_Scheduler::start() now also starts secondary CPUs in SMP
		systems.
		Added cyg_kernel_smp_startup() as entry point from HAL into kernel
		for secondary CPUs.

		* include/mlqueue.hxx:
		Added Cyg_RunQueue type and removed
		Cyg_SchedulerThreadQueue_Implementation type.
		Converted timeslice_count to CPU indexed array.
		Added requeue() member function to scheduler class.
		Added cpu member to thread implementation class, to record
		thread's current CPU.

		* src/sched/mlqueue.cxx:
		Changed behaviour when in SMP system to remove scheduled thread
		from run queue and replace it when preempted.
		Added some extra asserts, and removed some that are no longer true
		in an SMP system.

		* src/instrmnt/meminst.cxx: In SMP systems: added spinlock to
		protect instrument buffer, added CPU Id in top 4 bits of thread Id
		field.

		* src/common/thread.cxx:
		Converted to use accessor functions for need_reschedule and
		current_thread.
		Rearranged idle thread creation to create one for each CPU.

		* include/test/stackmon.h: Extended to handle stack usage for
		multiple idle threads.

		* include/thread.inl:
		Added some extra instrumentation.

		* include/smp.hxx:
		Added this file to contain all kernel SMP support. The main
		definitions exported by this file are spin lock and scheduler lock
		implementation classes, for both SMP and uniprocessor
		configurations.

		* src/intr/intr.cxx: 
		* include/intr.hxx:
		Converted interrupt disable counter to CPU indexed array. In
		intr.cxx: added lock of scheduler lock in interrupt_end() rather
		than in default interrupt VSR.

		* cdl/kernel.cdl: Added option to enable SMP support.

		* include/instrmnt.h: 
		* cdl/instrument.cdl: Added SMP instrumentation.

	2001-05-25  Nick Garnett  <[e-mail]>

		* include/intr.hxx:
		* src/intr/intr.cxx: 
		Added default definition of CYGNUM_HAL_ISR_TABLE_SIZE. This is now
		used to declare the chain table so that architectures which have
		different sizes for the interrupt table and vector count will work
		correctly.

	2001-05-22  Nick Garnett  <[e-mail]>

		* include/sched.hxx (class Cyg_Scheduler_Base):
		Added annotation to sched_lock.

		* cdl/instrument.cdl:
		Rename CYGNUM_KERNEL_INSTRUMENT_BUFFER_WRAP to
		CYGDBG_KERNEL_INSTRUMENT_BUFFER_WRAP as it appears in the code.

2001-07-27  Jesper Skov  <[e-mail]>

	* src/intr/intr.cxx (chain_isr): Return isr_ret so caller (which
	may be an arbiter) can tell if the interrupt was handled.

2001-07-26  Gary Thomas  <[e-mail]>

	* src/common/clock.cxx (dsr): Fix problems mixing signed and
	unsigned values.  Normally only generated warnings, but...

2001-07-09  Jonathan Larmour  <[e-mail]>

	* include/sched.inl (unlock_reschedule): Fix commenting.
	* src/sched/sched.cxx: Improve description of unlock_inner().

2001-06-21  Jonathan Larmour  <[e-mail]>

	* src/common/thread.cxx (Cyg_Thread::Cyg_Thread): Initialize
	wakeup_count

2001-06-06  Hugo Tyson  <[e-mail]>

	* tests/clocktruth.cxx: New file.  A test to get a sanity check on
	whether the clock is accurate to wallclock time, only useful for
	humans to watch really.  But important!

2001-05-31  Jonathan Larmour  <[e-mail]>

	* include/thread.hxx (class Cyg_HardwareThread): Remove unused
	load_context() method.
	* include/thread.inl: Ditto.

2001-05-29  Jonathan Larmour  <[e-mail]>

	* src/sched/bitmap.cxx (rem_thread): No need to set need_reschedule...
	rescheduling will happen automatically when the state changes.

	* src/sched/mlqueue.cxx (add_thread): No need to explicitly clear
	thread->queue.

2001-04-26  Nick Garnett  <[e-mail]>

	* tests/intr0.cxx: 
	* tests/kintr0.c:
	Fixed these two tests so that they work properly on architectures
	where CYGNUM_HAL_ISR_MIN is not zero. These include the x86 and
	V850.

2001-04-18  Bart Veer  <[e-mail]>

	* tests/dhrystone.c:
	Fix the conditional for STDIO_FORMATTED_IO

2001-04-17  Bart Veer  <[e-mail]>

	* tests/stress_threads.c (setup_death_alarm):
	Cope with synthetic target reorg

	* tests/except1.cxx, tests/kexcept1.c:
	Reenable for the synthetic target

	* tests/tm_basic.cxx:
	Reenable for the synthetic target

2001-04-17  Jesper Skov  <[e-mail]>

	* cdl/kernel.cdl: Do cache tests on E7T.

2001-04-05  Nick Garnett  <[e-mail]>

	* tests/flag1.cxx: Apply same changes here as were applied to
	kflag1 on 2000-07-17. This allows this test to run to completion
	in slow targets, especially simulators.

	* tests/stress_threads.c: Reduce run time even further in
	simulator runs where instrumentation is enabled.

2001-04-03  Jesper Skov  <[e-mail]>

	* tests/dhrystone.c: Fix feature check.

2001-03-28  Jonathan Larmour  <[e-mail]>

	* cdl/kernel.cdl: Only need to compile dbg_gdb.cxx with
	CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT

	* src/debug/dbg_gdb.cxx: Add new dbg_thread_id() function.

2001-02-23  Jonathan Larmour  <[e-mail]>

	* include/thread.inl (attach_stack): Check for non-NULL stack base.

2001-02-11  Jonathan Larmour  <[e-mail]>

	* tests/stress_threads.c: CYGINT_ISO_STDIO_FORMATTED_IO needs a
	#ifdef not an #if.
	* tests/dhrystone.c: Ditto.

2001-02-04  Jonathan Larmour  <[e-mail]>

	* tests/kill.cxx: Increase delay for all targets, just in case some
	are slow.

2001-01-30  Hugo Tyson  <[e-mail]>

	* src/common/clock.cxx (rem_alarm): Must clear the enabled flag;
	this disappeared in the changes to using clists of 2001-01-09.
	Symptom was that an alarm, once disabled, could never be
	re-attached to its counter because it claimed it already was.
	Plus asserts with multiple disables - "bad counter object".

2001-01-30  Hugo Tyson  <[e-mail]>

	* src/common/thread.cxx (reinitialize): Following change of
	2000-12-05, if CYGFUN_KERNEL_THREADS_STACK_CHECKING, this was
	using the stack_base/stack_size variables directly to reinitialize
	the stack area.  This was wrong, and leaked store off the top and
	bottom of the stacks because the "buffer zone" was carved off
	repeatedly.  Fix is to use the published APIs which compensate.

2001-01-26  Nick Garnett  <[e-mail]>

	* include/mlqueue.hxx: 
	* src/sched/mlqueue.cxx:
	Restored Cyg_ThreadQueue_Implementation::remove() since it must
	clear the thread's queue pointer, which the base clist class
	remove() does not.

2001-01-24  Jesper Skov  <[e-mail]>

	* src/sched/mlqueue.cxx (highpri): Fix trace call.

2001-01-09  Nick Garnett  <[e-mail]>

	* include/mlqueue.hxx:
	* src/sched/mlqueue.cxx: 
	Converted to use clist.hxx list implementation. The main effect of
	this is to clean up the code and class definitions since much of
	what was part of the thread queue and thread classes now moves to
	the DNode and CList classes.

	* include/clock.hxx:
	* src/common/clock.cxx: 
	Converted to use clist.hxx list implementation. This removes all
	the explicit list manipulation code from the counter and alarm
	classes, resulting in cleaner, easier to understand code.

	* include/kapidata.h: Adjusted cyg_alarm struct to match Cyg_Alarm
	using Cyg_DNode.
	
2000-12-22  Jonathan Larmour  <[e-mail]>

	* include/thread.inl (check_stack): check word alignment with CYG_WORD
	not cyg_uint32
	Add extra stack checking for when stack limits are used.
	(measure_stack_usage): New function to measure stack usage of the thread
	(attach_stack): check word alignment with CYG_WORD not cyg_uint32
	Initialize stack to preset value when measuring stack usage
	(increment_stack_limit): Conditionalize here wrt 
	CYGFUN_KERNEL_THREADS_STACK_CHECKING and use the version in thread.cxx
	instead if CYGFUN_KERNEL_THREADS_STACK_CHECKING is defined.

	* src/common/thread.cxx (exit): If verbose stack measurement enabled,
	output stack usage
	(increment_stack_limit): Add version of this method when
	CYGFUN_KERNEL_THREADS_STACK_CHECKING *is* defined. This will add
	padding above the stack limit as necessary.

	* include/thread.hxx (class Cyg_HardwareThread): Add
	measure_stack_usage() member

	* cdl/thread.cdl (CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT):
	Add to implement stack usage measurement.

	* include/kapi.h (cyg_thread_measure_stack_usage): New function
	* src/common/kapi.cxx (cyg_thread_measure_stack_usage): New function

2000-12-08  Jonathan Larmour  <[e-mail]>

	* cdl/thread.cdl (CYGFUN_KERNEL_ALL_THREADS_STACK_CHECKING): 
	Requires threads list, rather than active_if them so that
	inference engine can do its thang.

2000-12-07  Jesper Skov  <[e-mail]>

	* src/debug/dbg-thread-demux.c: Add comment about the use of
	DBG_SYSCALL_THREAD_VEC_NUM vs CYGNUM_CALL_IF_DBG_SYSCALL.

2000-12-06  Hugo Tyson  <[e-mail]>

	* include/thread.inl (attach_stack): Additional assert check for
	unsigned wrap of the stack size in subtracting the signature
	areas' size.  Also round to whole words better.

2000-12-05  Hugo Tyson  <[e-mail]>

	* cdl/thread.cdl (CYGFUN_KERNEL_THREADS_STACK_CHECKING): New
	option, to control new stack check features.  Enabled by default,
	but only active if CYGPKG_INFRA_DEBUG and CYGDBG_USE_ASSERTS
	anyway, plus checking *all* threads is possible, but default off,
	iff CYGVAR_KERNEL_THREADS_LIST.

	* include/thread.hxx (class Cyg_HardwareThread): Define
	check_stack() function.

	* include/thread.inl (attach_stack): Add initialization of a
	signature in the top and base of the stack, if so configured.
	(check_stack): New function to check that signature for
	correctness; minor re-ordering to permit more inlining.

	* src/sched/sched.cxx (unlock_inner): Check departing and incoming
	thread stacks if CYGFUN_KERNEL_THREADS_STACK_CHECKING.  Also, if
	CYGFUN_KERNEL_ALL_THREADS_STACK_CHECKING, check all registered
	thread stacks.  This is placed here to get executed every
	clocktick and other interrupts that call DSRs, rather than messing
	with interrupt_end() or the idle thread.

2000-12-04  Hugo Tyson  <[e-mail]>

	* tests/kcache2.c (entry0): Make this more robust against a
	complete absence of useful caches.  Previous change was not
	careful enough.