changelog

eCos1.31版

	* include/hal_intr.h (HAL_INTERRUPT_STACK_CALL_PENDING_DSRS): 
	Add macro for new DSR handling mechanism (was override of a
	"weak" symbol in kernel).	

1999-05-13  Nick Garnett  <[e-mail]>
	The following have been merged from a branch:
	
    1999-05-11  Nick Garnett  <[e-mail]>

	* include/hal_arch.h: 
	* include/hal_intr.h: 
	* include/hal_cache.h: 
	* include/arch.inc:
	Changed references to "imp" and "implementation" to "var" and
	"variant" respectively. These are better names for these files and
	functions.

	* src/vectors.S: 
	Removed or disabled some development/debug code.
	Same imp->var changes as above.
	
    1999-05-06  Nick Garnett  <[e-mail]>

	* src/vectors.S: Added call to hal_cpu_except_enable in
	__default_exception_vsr to re-enable nested exceptions.

	* src/mips-stub.c: Use _registers[X] rather that register[X] for
	accessing CPU registers, since the former may point to per-thread
	register sets while the latter only refers to the current trap
	register set.

	* include/arch.inc: Added hal_cpu_except_enable macro to
	(re-)enable exception processing and disable interrupts. This is
	necessary if we are to allow nested exceptions (like breakpoints
	in exception handlers).

    1999-04-29  Nick Garnett  <[e-mail]>

	* src/vectors.S: Reenable interrupts while processing exceptions.
	Several temporary kludges to permit us to test ROM code from RAM
	under PMON.

	* include/mips.inc: Extended list of CP0 register aliases.

	* include/mips-stub.h: The stubs must behave as if we are on a 64
	bit processor when debugging the VR4300, since that is what GDB
	expects.
	
	* include/arch.inc: Added generic version of hal_cache_init to
	disable kseg0 caching in config0 register.

	* include/hal_cache.h: Moved dummy addresses used in index
	operations to 0x80000000, zero caused MMU exceptions.
	Fixed looping bugs in all macros that use them.

    1999-04-28  Gary Thomas  <[e-mail]>

	[v1_2_2_beta branch]
	* src/vectors.S: Add dummy "__gccmain()"

    1999-04-27  Gary Thomas  <[e-mail]>

	* include/hal_arch.h: Make minimum stack sizes more realistic.
	Also fix size of interrupt stack frame when FPU present.

    1999-04-23  Nick Garnett  <[e-mail]>

	* src/vectors.S: Added support for floating point register save
	and restore. Fixed hal_interrupt_stack_call_pending_DSRs to use
	hal_cpu_int_merge macro.

	* src/context.S: Added support for floating point register save
	and restore. Started some preparations for 64 bit processor
	support.

	* include/mips.inc: Added floating point register aliases. Moved
	saved state to arch.inc.

	* include/hal_arch.h: Completed support for floating point state
	save and restore. Parameterized GDB support macros a little to
	enable GDB to work properly.

	* include/arch.inc: Added support for floating point state save
	and restore. Moved assembler version of saved state layout here
	from mips.inc.

    1999-04-22  Nick Garnett  <[e-mail]>

	* src/context.S (hal_thread_load_context): Substituted explicit
	code to reload the interrupt enable state with a macro.

	* include/hal_cache.h: Removed default implementations of
	HAL_[D/I]CACHE_[EN/DIS]ABLE since these were actually TX39
	specific. There is aparrently no standard way of implementing
	these function in the MIPS architecture.

	* include/mips.inc: Added a comment to point out a TX39-only
	register.
	
	* src/vectors.S: Modified hal_interrupt_stack_call_pending_DSRs()
	to also call DSRs with interrupts enabled. Returns interrupt state
	to original value when finished.
	Use hal_cpu_int_ensable macro in place of explicit code in
	hal_interrupt_stack_call_pending_DSRs().

    1999-04-21  Nick Garnett  <[e-mail]>

	* include/arch.inc: Ifdeffed definition of hal_intc_init macro to
	allow it to be defined elsewhere. Added default versions of diag
	macros.

	* src/vectors.S: Added some low-level diagnostic macros to show
	HAL events if there is adequate hardware (such as leds).
	Removed interrupt enable/disables in interrupt processing since we
	can now go through a thread switch with interrupts disabled.
	Ifdeffed ISR tables so they can be defined elsewhere.
	Added implementation of hal_interrupt_stack_call_pending_DSRs.
	Added calls to implementation and platform init routines.
	
	* src/hal_misc.c: Many changes to hal_idle_thread_action() to
	print or instrument various CPU registers. Left with code to
	wiggle an led in the idle loop.
	Stripped out TX39 specific code and moved it to plf_misc.c.
	
	* src/context.S: Added code to save and restore the interrupt mask
	state in thread contexts.

	* include/hal_intr.h:
	Renamed default interrupts to match the hardware more closely.
	Added ifdef around HAL_TRANSLATE_VECTOR() so it can be made
	platform/variant specific. Added implementation of
	HAL_INTERRUPT_ACKNOWLEDGE().

	* include/hal_arch.h (HAL_THREAD_INIT_CONTEXT): Aligned the
	intitial stack pointer to 16 byte boundary, added an initial value
	for the status register.

	* include/arch.inc: Added some nops to eret macros.

    1999-04-13  John Dallaway  <[e-mail]>

	* src/mips.ld: Migrate global MIPS linker script to individual
	MIPS variant directories

1999-04-30  Hugo Tyson  <[e-mail]>

	Merge the following changes from the 1.2.1 release branch,
	but without any CDL for CYGDBG_HAL_MIPS_INSTALL_CTRL_C_ISR,
	it is always on.

    1999-04-30  Jesper Skov  <[e-mail]>
	* src/hal_misc.c: Added vector decoding to the below.
    1999-04-30  Hugo Tyson  <[e-mail]>
	* src/hal_misc.c (hal_init_ctrlc_intr): Chain onto the old value
	of the ISR when attaching the ctrl-c ISR; this allows chained
	interrupts to work (otherwise a stack-wrecking interrupt loop
	occurs).
    1999-04-29  Hugo Tyson  <[e-mail]>
	* include/pkgconf/hal_tx39.h (CYGDBG_HAL_MIPS_INSTALL_CTRL_C_ISR): 
	New config option, on by default.
	* src/hal_misc.c (hal_ctrlc_isr): Enable these features on
	CYGDBG_HAL_MIPS_INSTALL_CTRL_C_ISR new config option.

1999-04-28  Bart Veer  <[e-mail]>

	* src/PKGconf.mak:
	Remove the -n argument to tail, it does not appear to be required
	on any supported host and causes problems with some
	implementations of tail.

1999-04-20  Jonathan Larmour  <[e-mail]>

	* include/hal_intr.h: Don't sync TRR if platform sim - it doesn't need
	it

	* include/pkgconf/hal_tx39.h: 
	Allow CYGARC_TX39_PR19846 to override
	CYGHWR_HAL_MIPS_TX3904_TRR_REQUIRES_SYNC so that we can do something
	sensible in the simulators
	
	Related to PR 19846

1999-04-15  Jonathan Larmour  <[e-mail]>

	* src/tx39.ld: Define __bss_end at the end of the BSS
	* src/hal_misc.c (hal_zero_bss): Stop at __bss_end rather than _end
	when clearing BSS
	These fix PR 19750

1999-04-15  Jonathan Larmour  <[e-mail]>

	* src/hal_misc.c:
	* src/vectors.S:
	Separate parts of cyg_hal_invoke_constructors() out into new functions
	cyg_hal_enable_caches() and cyg_hal_debug_init() so that
	cyg_hal_invoke_constructors() can be called again safely if
	necessary
	Related fix to that of PR19642

1999-04-14  Jonathan Larmour  <[e-mail]>

	* src/PKGconf.mak (EXTRAS): Don't generate extras.o here any more
	But do define EXTRAS every time for the linker script

1999-04-13  Jonathan Larmour  <[e-mail]>

	* include/hal_intr.h (HAL_CLOCK_READ): 
	Add workaround for tx39 bug - needs to sync and wait for the
	write buffer to clear before reading the clock.
	Submitted by [e-mail]

	* include/pkgconf/hal_tx39.h
	(CYGHWR_HAL_MIPS_TX3904_TRR_REQUIRES_SYNC): Define this by default
	to implement above

1999-04-12  Jonathan Larmour  <[e-mail]>

	* include/hal_intr.h (HAL_VSR_SET_TO_ECOS_HANDLER): Added.
	(HAL_VSR_SET): Cast types to CYG_ADDRESS to prevent warnings

	Part of fix for PRs 19731/19607

1999-04-09  Jesper Skov  <[e-mail]>

	* src/mips-stub.c: 
	Moved get_register and put_register to hal_stub.c.

1999-04-08  John Dallaway  <[e-mail]>

	* src/*.ld: Use double underscore substitution for period
	character in SECTION_* macro names (PR 19787)

1999-04-08  John Dallaway  <[e-mail]>

	* src/*.ld: Revised SECTION_* macro arguments to
	avoid padded output sections (PR 19787)

1999-03-31  Nick Garnett  <[e-mail]>

	* include/hal_cache.h: Added include of hal.h and a test that a
	valid set of macros have been added.
	Also moved address used in HAL_DCACHE_INVALIDATE_ALL() to
	0x9fc00000, which is the cached ROM space.

1999-03-24  Nick Garnett  <[e-mail]>

	* src/vectors.S:
	Added options to allow different settings for DRAM initialization.
	Fixed some ifdef bugs. 

	* src/hal_misc.c (cyg_hal_invoke_constructors):
	Added ifdefs to control enabling and disabling of timeout
	exceptions.

	* include/pkgconf/hal_tx39.h:
	Added translations from the user friendly CPU speed settings into
	the real CPU frequencies in Hz.

	* include/hal_intr.h:
	Added HAL_TX39_DEBUG_TOE_ENABLE() and ...DISABLE, to switch
	timeout exceptions on and off.

1999-03-23  Nick Garnett  <[e-mail]>

	* include/hal_arch.h:
	Modified stack size definitions to be more accurate.

1999-03-22  Jonathan Larmour  <[e-mail]>

	* include/mips-regs.h: Update copyright

	* include/mips-stub.h: Update copyright

	* src/mips-stub.c: Update copyright

1999-03-22  Hugo Tyson  <[e-mail]>

	* include/hal_arch.h: 
	Use CYGNUM_HAL_STACK_SIZE_TYPICAL for the stack size instead of
	CYGNUM_HAL_MINIMUM_STACK_SIZE.

1999-03-17  Jonathan Larmour  <[e-mail]>

	* src/hal_misc.c (cyg_hal_user_break): Remove #warning - it doesn't
	really provide any useful info, and may unnecessarily worry a user
	since it fires in normal situations

1999-03-17  John Dallaway  <[e-mail]>

	* src/PKGconf.mak: Remove dependence on echo '-e' switch.

1999-03-16  Nick Garnett  <[e-mail]>

	* src/vectors.S: Removed definition of idle thread stack. 

1999-03-15  Nick Garnett  <[e-mail]>

	* include/hal_cache.h:
	Changed implementation of HAL_DCACHE_INVALIDATE_ALL() to read from
	ROM space rather than RAM. This fixes PR 19510.

1999-03-12  Nick Garnett  <[e-mail]>

	* src/vectors.S: Modified ROMC and SCS settings in line with
	Toshiba's suggestions for compatibility with other CPU variants.

1999-03-12  Gary Thomas  <[e-mail]>

	* include/hal_arch.h: Add definition for 'CYGNUM_HAL_MINIMUM_STACK_SIZE'

1999-03-11  Nick Garnett  <[e-mail]>

	* src/hal_misc.c:
	Disabled use of stand-alone ^C detection interrupt. This is now
	done in the serial driver. Added cyg_hal_is_break() and
	cyg_hal_user_break() to detect and provoke ^C processing. These
	are used by the serial driver and will one day interact with the
	BSP/Cygmon/GDB stubs to do the right thing.

1999-03-10  Jesper Skov  <[e-mail]>

	* include/hal_intr.h (HAL_INTERRUPT_IN_USE): Added.

1999-03-10  Nick Garnett  <[e-mail]>

	* include/pkgconf/hal_tx39.h: 
	* src/vectors.S:
	Changed names used to control CPU frequency into something more
	generic. Moved definition into hal_tx39.h from hal_tx39_jmr3904.h.

1999-03-09  Jesper Skov  <[e-mail]>
        PR 19370
	* src/hal_misc.c (cyg_hal_invoke_constructors): Changed
	constructor loop.

1999-03-05  Gary Thomas  <[e-mail]>

	* src/tx39.ld: 
	* src/PKGconf.mak: Clean up I/O package changes.

1999-03-04  Jonathan Larmour  <[e-mail]>

	* src/tx39.ld: 
	Add INPUT(libextras.a), include libextras.a in GROUP() and include 
	new __DEVTAB__ section for new device drivers

1999-02-25  Nick Garnett  <[e-mail]>

	* src/vectors.S:
	Changed label used to access scheduler lock to one that is not
	mangled by C++. This is intended to make support for interrupt
	handling in non-kernel configurations easier.
	Added some code to initialize DRAM in ROM-only configurations.

1999-02-23  Nick Garnett  <[e-mail]>

	* src/hal_misc.c: 
	Added support for SIGINT-causing magic breakpoint. This involves
	passing a third, hidden argument to hal_ctrlc_isr() which is a
	pointer to the saved CPU state.
	
	* src/vectors.S:
	Added support for 66MHz part (untested).
	Added support for SIGINT-causing magic breakpoint to allow
	continuation after ^C. This also relies on CYGMON changes.

1999-02-20  Jonathan Larmour  <[e-mail]>

	* include/hal_arch.h: 
	Rename deliver_exception() -> cyg_hal_deliver_exception()
	QA improvements

	* include/hal_intr.h:
	Reorganise vector/interrupt/exception names according to purpose
	QA improvements