2001-09-05  Jonathan Larmour  <jlarmour@redhat.com>

	* src/vectors.S (__default_interrupt_vsr): Adjust saved stack pointer
	for the hardware and trampoline saved data.
	(__default_exception_vsr): Ditto.

2001-08-31  Nick Garnett  <nickg@redhat.com>

	* include/arch.inc: Clean up typo in stack switching macros.

2001-08-22  Nick Garnett  <nickg@redhat.com>

	* include/hal_io.h: Added some macros to do in-memory data
	accesses for memory mapped devices.

	* include/hal_arch.h: Attempted to make some sense out of the
	stack size macros.

	* include/hal_intr.h: Extended VSR table to its full 256 entries.

2001-07-31  Jonathan Larmour  <jlarmour@redhat.com>

	* src/hal_misc.c: Fix "implicit decl of diag_printf" warning.

2001-07-13  Nick Garnett  <nickg@redhat.com>

	* include/arch.inc:
	Added code to clear CR0:TS bit in hal_fpu_init macro. If this bit
	is not clear, then the following finit might trap, and we don't
	want that.
	Added a compare to hal_fpu_push_exc macro for a zero fpu state
	owner. The code was assuming the move set the condition codes,
	which it doesn't.

2001-07-08  Jonathan Larmour  <jlarmour@redhat.com>

	* include/hal_arch.h (HAL_THREAD_INIT_FPU_CONTEXT): Fix indirection to
	fpucontext members.

2001-07-05  Jonathan Larmour  <jlarmour@redhat.com>

	* include/hal_intr.h (HAL_RESTORE_INTERRUPTS): Don't change name
	for clobbers.

2001-07-04  Jonathan Larmour  <jlarmour@redhat.com>

	* include/hal_intr.h: Be pedantic about register constraint syntax
	to satisfy newer compilers
	* include/hal_io.h: Ditto

2001-06-13  Jonathan Larmour  <jlarmour@redhat.com>

	* cdl/hal_i386.cdl: Default to enabling FPU support since gcc assumes
	a hardware FPU anyway. Also default to lazy FPU switching since
	this is cheapest in the modal case.

2001-05-01  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]	
	* src/context.S: Fixed bug in hal_setjmp() that corrupted EBX.

2001-04-26  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	* include/hal_intr.h:
	Tidied up mapping of exceptions to vectors. Added implementation
	of HAL_VSR_SET_TO_ECOS_HANDLER().

2001-04-19  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	* src/vectors.S (__default_exception_vsr):
	Disabled ROM monitor stack switching here. There are problems with
	this that I do not have time to worry about now. 

2001-03-30  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	* src/romboot.S: Added code to call video BIOS to initialize
	display.

	* src/vectors.S: Added code to copy data section from ROM to RAM
	in ROM booted systems.

2001-03-16  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	* src/romboot.S:
	* src/romboot.ld:
	Added these files to build 256 byte realmode bootstrap at the top
	of ROM.
	(This is work in progress and is not yet complete.)
	
	* cdl/hal_i386.cdl:
	Added options for building a bootstrap ROM.
	(This is work in progress and is not yet complete.)
	
	* include/basetype.h:
	Returned alignment to 32 bytes, now that I have discovered, the
	hard way, why it was that value in the first place.

	* src/i386.ld: Force alignment of tables to 32 bytes.

	* include/hal_arch.h (HAL_THREAD_INIT_FPU_CONTEXT_SPACE): Fixed
	compiler warning.

2001-03-14  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	* src/vectors.S:
	Removed memory size stuff.
	Moved BSS zero code here to avoid doing a procedure call. The
	interrupt stack is in the BSS so zeroing it would blow the return
	address away.
	Moved interrupt stack to BSS.

	* src/hal_misc.c: Removed hal_zero_bss(), hal_lsbit_index() and
	hal_msbit_index() functions.

	* include/hal_arch.h:
	Replaced hal_[lm]sbit_index() functions with inline assembler
	using the bsf and bsr instructions.
	Added support for dynamic memory size finder.	

	* cdl/hal_i386.cdl:
	Added interface CYGINT_HAL_I386_MEM_REAL_REGION_TOP.

2001-03-13  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	* src/vectors.S: Enabled FPU support.
	Added FPU state save and restore macros to default exception and
	interrupt VSRs.
	Added __fpu_switch_vsr to perform lazy context switch of FPU
	state.
	Made use of i386reg_xxx definitions.

	* src/context.S: Added FPU save and restore macros to thread
	switch code. Made use of i386reg_xxx definitions.

	* include/hal_arch.h: Added HAL_FPU_Context structure to contain
	FPU state. Added code to HAL_THREAD_INIT_CONTEXT() to create
	FPU context.

	* include/i386.inc: Updated savestate format in line with hal_arch.h

	* include/arch.inc: Added macros to implement FPU initialization,
	save and restore for threads, exceptions and interrupts.

	* cdl/hal_i386.cdl: Added initial FPU configuration options.

2001-03-09  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	* src/vectors.S:
	Added support for use of interrupt stack, together with support
	for running DSRs on it.
	Added instrumentation support to default interrupt VSR.
	Miscellaneous tidies to code and comments.

	* src/context.S:
	Rewrote context switch code to permit preservation of the
	interrupt disable state of a thread. This is to support use of an
	interrupt stack, calling DSRs on it and brings the i386 HAL in
	line with other HALs.

	* include/hal_intr.h:
	Added HAL_INTERRUPT_STACK_CALL_PENDING_DSRS(),
	HAL_INTERRUPT_STACK_BASE and HAL_INTERRUPT_STACK_TOP.

	* include/i386.inc: 
	* include/hal_arch.h:
	* src/i386_stub.c:
	Changed naming of last two HAL_SavedRegisters fields.
	Modified HAL_THREAD_INIT_CONTEXT() to match new context switch
	code.

2001-03-08  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	* src/vectors.S: Eliminated some unnecessary code. Tidied up some
	comments.

	* include/hal_intr.h:
	Moved common exception vector definitions here.
	Moved CPU interrupt enable/disable macros here.
	
	* include/hal_arch.h:
	* src/i386_stub.c: 
	Converted arguments to hal_[g|s]et_gdb_registers() to CYG_ADDRWORD
	from target_register_t.

	* include/arch.inc:
	Moved FPU control stuff here - this still needs a lot of work to
	get running.
	Moved A20 gate enable macro here. Since the A20 gate stuff is part
	of all recent CPUs, this has become an architectural feature.

2001-03-06  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]	
	* include/hal_arch.h: Added CYGARC_CACHED_ADDRESS() and friends.

2001-03-05  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]	
	* src/hal_misc.c (hal_arch_default_isr): Restored diag_printf() in
	here. Without the reference, RedBoot does not include anything
	from infra/diag.cxx, does not call HAL_DIAG_INIT() and will not
	mangle diagnostic output. 

2001-03-02  Nick Garnett  <nickg@cygnus.co.uk>

	[x86 branch]
	Some of these changes here were initially made by Fabrice Gautier
	and then liberally modified by me.
	
	* src/vectors.S:
	Removed Synthetic target support - this is moving to its own HAL.
	Added __default_exception_vsr to capture exceptions.
	Renamed hal_pc_generic_interrupt to __default_interrupt_vsr in
	line with other HALs. Generally tidied and polished.
	Added VSR entry trampolines.
	Added interrupt stack definition.

	* src/i386_stub.c: Removed a lot of unnecessary stuff.

	* src/i386.ld: Added absolute defines for IDT, VSR and virtual
	vector tables.

	* src/hal_misc.c: Tidied up and added eCos exception support.

	* src/context.S:
	Modified to save and restore context in new format.

	* include/i386_stub.h:
	Added definition of HAL_STUB_PLATFORM_STUBS_FIXUP() macro.

	* include/hal_io.h: Implemented these macros as inline assembler.

	* include/hal_intr.h: Various changes to interrupt and VSR table
	handling macros.

	* include/hal_arch.h: 
	* include/i386.inc:
	Redfined HAL_SavedRegisters structure and init macro. Now all
	contexts consist of a full register set, vector number, and
	PC,CS,EFLAGS as pushed by the hardware.

	* include/basetype.h: Changed alignment to 4 bytes.

2000-11-01  Jonathan Larmour  <jlarmour@redhat.com>

	* src/vectors.S (hal_pc_irq): Use correct register for ISR return value
	when calling interrupt_end()
	Thanks to Phil Hinton for reporting.

2000-10-20  Jonathan Larmour  <jlarmour@redhat.com>

	* src/vectors.S (_start): call constructors after initializing
	stub so that they can be debugged. Reported to work okay
	by Fabrice Gautier.

2000-09-05  Jonathan Larmour  <jlarmour@redhat.com>

	* include/basetype.h: Use 32-byte alignment

2000-08-14  Jonathan Larmour  <jlarmour@redhat.co.uk>

	From Fabrice Gautier:
	* src/hal_misc.c (hal_zero_bss): Use __bss_end not _end
	* src/i386.ld: Add __bss_end symbol to end of SECTION_bss

2000-06-21  Nick Garnett  <nickg@cygnus.co.uk>

	* src/i386_stub.c: Removed use of CYG_LABEL_NAME() and added
	underscore to _breakinst.

	* src/i386.ld: Switched to new table definition mechanism.

	* include/basetype.h: Removed definition of CYG_LABEL_NAME().

2000-06-08  Jesper Skov  <jskov@redhat.com>

	* include/hal_arch.h (CYGARC_HAL_SAVE_GP, CYGARC_HAL_RESTORE_GP):
	Added.

2000-03-27  Jonathan Larmour  <jlarmour@redhat.co.uk>

	* include/basetype.h: Let cyg_halbool revert to the system default
	(i.e. a word)

2000-03-24  Jesper Skov  <jskov@redhat.com>

	* include/basetype.h: Define bool type since it's only 8 bits.
	(cyg_halbool): always unsigned char.

2000-03-02  Jonathan Larmour  <jlarmour@redhat.co.uk>

	* src/hal_misc.c (cyg_hal_exception_handler): Comment out since
	it's unimplemented

2000-02-16  Jesper Skov  <jskov@redhat.com>

	* src/i386_stub.c: CYG_HAL_I386 -> CYGPKG_HAL_I386

2000-02-16  Jesper Skov  <jskov@redhat.com>

	* cdl/hal_i386.cdl: remove fix mes.

2000-02-10  Nick Garnett  <nickg@cygnus.co.uk>

	* include/hal_arch.h: Merged PC platform support changes
	contributed by Patrick O'Grady (pjo)(patrick@softprocess.com).

	* include/hal_intr.h: Moved Linux specific support out to its own
	var_intr.h.

	* src/context.S: Added FP switch code from pjo, suitably
	protected.

	* src/PKGconf.mak: Added i386_stub.c to COMPILE list.

	* cdl/hal_i386.cdl: Added i386_stub.c to compile list.

	* src/i386_stub.c:
	* include/arch.inc: Files added.

	* src/hal_misc.c: Added hal_zero_bss().

	* src/vectors.S: Added PC support code.

2000-01-28  Gary Thomas  <gthomas@cygnus.co.uk>

	* src/i386.ld: Add support for network package.

2000-01-21  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h (HAL_INTERRUPT_MASK, HAL_INTERRUPT_UNMASK): 
	Define.

	(HAL_INTERRUPT_ACKNOWLEDGE): 
	(HAL_CLOCK_RESET): 
	Let acknowledge clear pending flag, but leave unblocking to
	clients of the interrupt (i.e., RTC).

1999-12-02  John Dallaway  <jld@cygnus.co.uk>

	* cdl/hal_i386.cdl:

	Use the <PACKAGE> token in custom rules.

1999-12-01  John Dallaway  <jld@cygnus.co.uk>

	* cdl/hal_i386.cdl:

	Use the <PREFIX> token in custom rules.

1999-11-04  John Dallaway  <jld@cygnus.co.uk>

	* cdl/hal_i386.cdl:

	Output custom rule dependency information to .deps files in
	the current directory.

	Dispense with the need to create a 'src' sub-directory.

1999-11-01  Jesper Skov  <jskov@cygnus.co.uk>

	* cdl/hal_i386.cdl: Added.

1999-10-25  Jonathan Larmour  <jlarmour@cygnus.co.uk>

	* src/i386.ld: Add asterisks to input section names to make them more
	tolerant of subtle differences

1999-10-05  Jesper Skov  <jskov@cygnus.co.uk>
        From Andrew Lunn (lunn@ma.tech.ascom.ch)
	* include/hal_arch.h (HAL_IDLE_THREAD_ACTION): Defined.

1999-05-14  Jesper Skov  <jskov@cygnus.co.uk>
        PR 18956
	* src/i386.ld: Fixed problem with rel_got.
	Encode . in section name as __.

1999-05-13  Hugo Tyson  <hmt@cygnus.co.uk>

	* include/hal_arch.h (HAL_THREAD_INIT_CONTEXT): Align stack
	(rather conservatively) before use.

1999-04-28  Bart Veer  <bartv@cygnus.co.uk>

	* 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.

1999-04-14  Jonathan Larmour  <jlarmour@cygnus.co.uk>

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

1999-04-08  John Dallaway  <jld@cygnus.co.uk>

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

1999-04-08  John Dallaway  <jld@cygnus.co.uk>

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

1999-03-23  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_arch.h: Added stack values.

1999-03-22  Hugo Tyson  <hmt@cygnus.co.uk>

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

1999-03-22  Jesper Skov  <jskov@cygnus.co.uk>

	* src/vectors.S: 
	* include/hal_intr.h:
	Changed CYG_HAL_ to CYGPKG_HAL_

	* include/hal_intr.h:
	Include the hal_i386_linux header file. 

1999-03-22  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: 
	* include/hal_arch.h: 
	Cleaned up some FIX MEs.

1999-03-17  John Dallaway  <jld@cygnus.co.uk>

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

1999-03-16  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: 
	Cleaned up macros. 
	Renamed hal_ to	cyg_hal_. 

1999-03-12  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: Default contents of vector table changed.

1999-03-12  Gary Thomas  <gthomas@cygnus.co.uk>

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

1999-03-10  Jesper Skov  <jskov@cygnus.co.uk>

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

1999-03-08  Nick Garnett  <nickg@cygnus.co.uk>

	* src/i386.ld:
	Added alignment before definition of __DEVTAB__.

1999-03-05  Gary Thomas  <gthomas@cygnus.co.uk>

	* src/i386.ld: 
	* src/PKGconf.mak: Clean up I/O package changes.

1999-03-04  Jonathan Larmour  <jlarmour@cygnus.co.uk>

	* src/i386.ld: 
	Add INPUT(libextras.a), add libextras.a to GROUP() and include
	new section for device driver table

1999-02-25  Nick Garnett  <nickg@cygnus.co.uk>

	* src/i386.ld:
	Removed alias for Cyg_Scheduler::sched_lock, since this is now
	handled elsewhere.

1999-02-20  Jonathan Larmour  <jlarmour@cygnus.co.uk>

	* include/hal_arch.h: 
	Rename deliver_exception -> cyg_hal_deliver_exception

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

	* src/hal_misc.c:
	Rename deliver_exception -> cyg_hal_deliver_exception
	Rename exception_handler -> cyg_hal_exception_handler

1999-02-08  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: Always allocate space for at least one
	exception vector.

1999-02-05  John Dallaway  <jld@cygnus.co.uk>

	* src/i386.ld: Add LMA_EQ_VMA macro definition.

1999-01-29  Jesper Skov  <jskov@cygnus.co.uk>
        PR 18966
	* src/hal_misc.c (cyg_hal_invoke_constructors): Added
	cyg_hal_stop_constructors code.

1999-01-25  Jesper Skov  <jskov@cygnus.co.uk>

	* src/i386.ld: Added rel.got section. Cleaned up a bit.

1999-01-22  Jesper Skov  <jskov@cygnus.co.uk>

	* src/hal_misc.c: Moved external declarations into top-level
	scope to avoid compiler warning.

1999-01-20  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_arch.h: 
	* src/context.S: 
	Added setjmp/longjmp support.

	* src/hal_misc.c: Removed bogus setjmp/longjmp functions.

1999-01-20  Jesper Skov  <jskov@cygnus.co.uk>

	* src/context.S: 
	* include/hal_arch.h:
	* include/i386.inc: [added]
	Rewrote the context switch code.

1999-01-20  Jesper Skov  <jskov@cygnus.co.uk>

	* src/i386.ld (SECTION_bss): Added align statement.

1999-01-14  Jesper Skov  <jskov@cygnus.co.uk>

	* src/hal_misc.c: Add bogus setjmp & longjmp functions to prevent
	compiler error.

1999-01-12  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: Made virtual timer the default.

1999-01-12  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h (HAL_CLOCK_LATENCY): Return the clock read
	value.

1999-01-12  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: Made all Linux stuff CYG_HAL_I386_LINUX
	conditional.

	* include/hal_cache.h: Added HAL_DCACHE_UNLOCK_ALL (empty) macro.

1999-01-12  Jesper Skov  <jskov@cygnus.co.uk>

	* include/pkgconf/hal_i386.h: Added.

1999-01-11  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_arch.h: Fix HAL_SavedRegisters struct definition.

	* include/hal_intr.h: Made interrupt enable/disable macros behave
	more like the macros used for real HW CPUs.

1999-01-11  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: Removed IN_OUT target conditional.

1999-01-11  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: 
	* include/hal_io.h: 
	Cleaned up some more.

	* include/hal_diag.h: Moved to i386/linux

	* include/hal_arch.h: 
	* include/basetype.h: 
	Comment fix.

1999-01-08  Jesper Skov  <jskov@cygnus.co.uk>

	* include/basetype.h (CYG_LABEL_NAME): Added.

1999-01-07  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h (HAL_CLOCK_INITIALIZE): Use _period_
	argument.
	Added CYG_VECTOR_ definitions.
	Added choice for real/virtual time (no config yet).

1999-01-07  Jesper Skov  <jskov@cygnus.co.uk>

	* src/vectors.S: 
	* src/hal_misc.c: 
	* src/context.S: 
	* include/hal_io.h: 
	* include/hal_cache.h: 
	* include/hal_arch.h: 
	* include/basetype.h: 
	* include/hal_diag.h: 
	Changed comment style & removed tabs.

1999-01-07  Jesper Skov  <jskov@cygnus.co.uk>

	* src/hal_misc.c (cyg_hal_invoke_constructors): Match new link
	behavior.

1999-01-07  Jesper Skov  <jskov@cygnus.co.uk>

	* src/vectors.S: Added. Simple stub for now.

	* src/crt_end.c:
	* src/crtbegin.c:
	Removed.

	* src/PKGconf.mak:
	* include/hal_intr.h:
	Cleaned up.

1999-01-06  Jesper Skov  <jskov@cygnus.co.uk>

	* src/crtbegin.c: 
	* src/crt_end.c: 
	* include/hal_intr.h:
	* include/hal_diag.h:
	* include/hal_arch.h:
	Fixed remaining warnings.

	* include/hal_intr.h (HAL_CLOCK_INITIALIZE): Changed timeout
	value.

1999-01-06  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: Move extern declarations into global scope,
	extern"C" doesn't work in sub-scopes.
	* include/hal_arch.h: Use CYG_MACRO_START/END, not HAL_...

1998-12-18  Jesper Skov  <jskov@cygnus.co.uk>

	* include/hal_intr.h: 
	* include/hal_arch.h:
        Fixed compiler warnings.
        Use CYG_MACRO_START/END.
        Added new HAL macros.

Wed Dec  9 14:09:47 GMT 1998   Chris Provenzano  <proven@cygnus.com>

	* src/crtbegin.c: Added.
	* src/crt_begin.c: Removed.
	* src/PKGconf.mak: Compile crtbegin.c to create the correct file 
        for linking. This is to turn on init-priority for i386 linux target.

        The default i386 linker script looks for the file named crtbegin.o
        and then looks for the .ctors section within that file to
        determine where to put the sorted constructors.
	
Mon Nov  9 15:18:11 GMT 1998   Chris Provenzano  <proven@cygnus.com>

	Initial i386 linux port.

//===========================================================================
//####COPYRIGHTBEGIN####
//                                                                          
// -------------------------------------------                              
// The contents of this file are subject to the Red Hat eCos Public License 
// Version 1.1 (the "License"); you may not use this file except in         
// compliance with the License.  You may obtain a copy of the License at    
// http://www.redhat.com/                                                   
//                                                                          
// Software distributed under the License is distributed on an "AS IS"      
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
// License for the specific language governing rights and limitations under 
// the License.                                                             
//                                                                          
// The Original Code is eCos - Embedded Configurable Operating System,      
// released September 30, 1998.                                             
//                                                                          
// The Initial Developer of the Original Code is Red Hat.                   
// Portions created by Red Hat are                                          
// Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.                             
// All Rights Reserved.                                                     
// -------------------------------------------                              
//                                                                          
//####COPYRIGHTEND####
//===========================================================================
