Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 347 insertions, 0 deletions

diff --git a/arch/m68k/ifpsp060/iskeleton.S b/arch/m68k/ifpsp060/iskeleton.S
new file mode 100644
index 000000000..91a9c65fe
--- /dev/null
+++ b/arch/m68k/ifpsp060/iskeleton.S
@@ -0,0 +1,347 @@
+|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+|MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
+|M68000 Hi-Performance Microprocessor Division
+|M68060 Software Package
+|Production Release P1.00 -- October 10, 1994
+|
+|M68060 Software Package Copyright © 1993, 1994 Motorola Inc.  All rights reserved.
+|
+|THE SOFTWARE is provided on an "AS IS" basis and without warranty.
+|To the maximum extent permitted by applicable law,
+|MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
+|INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+|and any warranty against infringement with regard to the SOFTWARE
+|(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials.
+|
+|To the maximum extent permitted by applicable law,
+|IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
+|(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
+|BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS)
+|ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
+|Motorola assumes no responsibility for the maintenance and support of the SOFTWARE.
+|
+|You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE
+|so long as this entire notice is retained without alteration in any modified and/or
+|redistributed versions, and that such modified versions are clearly identified as such.
+|No licenses are granted by implication, estoppel or otherwise under any patents
+|or trademarks of Motorola, Inc.
+|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+| iskeleton.s
+|
+| This file contains:
+|	(1) example "Call-out"s
+|	(2) example package entry code
+|	(3) example "Call-out" table
+|
+
+#include <linux/linkage.h>
+#include <asm/entry.h>
+#include <asm/asm-offsets.h>
+
+
+|################################
+| (1) EXAMPLE CALL-OUTS		#
+|				#
+| _060_isp_done()		#
+| _060_real_chk()		#
+| _060_real_divbyzero()		#
+|				#
+| _060_real_cas()		#
+| _060_real_cas2()		#
+| _060_real_lock_page()		#
+| _060_real_unlock_page()	#
+|################################
+
+|
+| _060_isp_done():
+|
+| This is and example main exit point for the Unimplemented Integer
+| Instruction exception handler. For a normal exit, the
+| _isp_unimp() branches to here so that the operating system
+| can do any clean-up desired. The stack frame is the
+| Unimplemented Integer Instruction stack frame with
+| the PC pointing to the instruction following the instruction
+| just emulated.
+| To simply continue execution at the next instruction, just
+| do an "rte".
+|
+| Linux/68k: If returning to user space, check for needed reselections.
+
+	.global		_060_isp_done
+_060_isp_done:
+	btst	#0x5,%sp@		| supervisor bit set in saved SR?
+	beq	.Lnotkern
+	rte
+.Lnotkern:
+	SAVE_ALL_INT
+	GET_CURRENT(%d0)
+	| deliver signals, reschedule etc..
+	jra	ret_from_exception
+
+|
+| _060_real_chk():
+|
+| This is an alternate exit point for the Unimplemented Integer
+| Instruction exception handler. If the instruction was a "chk2"
+| and the operand was out of bounds, then _isp_unimp() creates
+| a CHK exception stack frame from the Unimplemented Integer Instrcution
+| stack frame and branches to this routine.
+|
+| Linux/68k: commented out test for tracing
+
+	.global		_060_real_chk
+_060_real_chk:
+|	tst.b		(%sp)			| is tracing enabled?
+|	bpls		real_chk_end		| no
+
+|
+|	    CHK FRAME		   TRACE FRAME
+|	*****************	*****************
+|	*   Current PC	*	*   Current PC	*
+|	*****************	*****************
+|	* 0x2 *  0x018	*	* 0x2 *  0x024	*
+|	*****************	*****************
+|	*     Next	*	*     Next	*
+|	*      PC	*	*      PC	*
+|	*****************	*****************
+|	*      SR	*	*      SR	*
+|	*****************	*****************
+|
+|	move.b		#0x24,0x7(%sp)		| set trace vecno
+|	bral		_060_real_trace
+
+real_chk_end:
+	bral		trap			| jump to trap handler
+
+|
+| _060_real_divbyzero:
+|
+| This is an alternate exit point for the Unimplemented Integer
+| Instruction exception handler isp_unimp(). If the instruction is a 64-bit
+| integer divide where the source operand is a zero, then the _isp_unimp()
+| creates a Divide-by-zero exception stack frame from the Unimplemented
+| Integer Instruction stack frame and branches to this routine.
+|
+| Remember that a trace exception may be pending. The code below performs
+| no action associated with the "chk" exception. If tracing is enabled,
+| then it create a Trace exception stack frame from the "chk" exception
+| stack frame and branches to the _real_trace() entry point.
+|
+| Linux/68k: commented out test for tracing
+
+	.global		_060_real_divbyzero
+_060_real_divbyzero:
+|	tst.b		(%sp)			| is tracing enabled?
+|	bpls		real_divbyzero_end	| no
+
+|
+|	 DIVBYZERO FRAME	   TRACE FRAME
+|	*****************	*****************
+|	*   Current PC	*	*   Current PC	*
+|	*****************	*****************
+|	* 0x2 *  0x014	*	* 0x2 *  0x024	*
+|	*****************	*****************
+|	*     Next	*	*     Next	*
+|	*      PC	*	*      PC	*
+|	*****************	*****************
+|	*      SR	*	*      SR	*
+|	*****************	*****************
+|
+|	move.b		#0x24,0x7(%sp)		| set trace vecno
+|	bral		_060_real_trace
+
+real_divbyzero_end:
+	bral		trap			| jump to trap handler
+
+|##########################
+
+|
+| _060_real_cas():
+|
+| Entry point for the selected cas emulation code implementation.
+| If the implementation provided by the 68060ISP is sufficient,
+| then this routine simply re-enters the package through _isp_cas.
+|
+	.global		_060_real_cas
+_060_real_cas:
+	bral		_I_CALL_TOP+0x80+0x08
+
+|
+| _060_real_cas2():
+|
+| Entry point for the selected cas2 emulation code implementation.
+| If the implementation provided by the 68060ISP is sufficient,
+| then this routine simply re-enters the package through _isp_cas2.
+|
+	.global		_060_real_cas2
+_060_real_cas2:
+	bral		_I_CALL_TOP+0x80+0x10
+
+|
+| _060_lock_page():
+|
+| Entry point for the operating system`s routine to "lock" a page
+| from being paged out. This routine is needed by the cas/cas2
+| algorithms so that no page faults occur within the "core" code
+| region. Note: the routine must lock two pages if the operand
+| spans two pages.
+| NOTE: THE ROUTINE SHOULD RETURN AN FSLW VALUE IN D0 ON FAILURE
+| SO THAT THE 060SP CAN CREATE A PROPER ACCESS ERROR FRAME.
+| Arguments:
+|	a0 = operand address
+|	d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
+|	d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
+| Expected outputs:
+|	d0 = 0 -> success; non-zero -> failure
+|
+| Linux/m68k: Make sure the page is properly paged in, so we use
+| plpaw and handle any exception here. The kernel must not be
+| preempted until _060_unlock_page(), so that the page stays mapped.
+|
+	.global		_060_real_lock_page
+_060_real_lock_page:
+	move.l	%d2,-(%sp)
+	| load sfc/dfc
+	tst.b	%d0
+	jne	1f
+	moveq	#1,%d0
+	jra	2f
+1:	moveq	#5,%d0
+2:	movec.l	%dfc,%d2
+	movec.l	%d0,%dfc
+	movec.l	%d0,%sfc
+
+	clr.l	%d0
+	| prefetch address
+	.chip	68060
+	move.l	%a0,%a1
+1:	plpaw	(%a1)
+	addq.w	#1,%a0
+	tst.b	%d1
+	jeq	2f
+	addq.w	#2,%a0
+2:	plpaw	(%a0)
+3:	.chip	68k
+
+	| restore sfc/dfc
+	movec.l	%d2,%dfc
+	movec.l	%d2,%sfc
+	move.l	(%sp)+,%d2
+	rts
+
+.section __ex_table,"a"
+	.align	4
+	.long	1b,11f
+	.long	2b,21f
+.previous
+.section .fixup,"ax"
+	.even
+11:	move.l	#0x020003c0,%d0
+	or.l	%d2,%d0
+	swap	%d0
+	jra	3b
+21:	move.l	#0x02000bc0,%d0
+	or.l	%d2,%d0
+	swap	%d0
+	jra	3b
+.previous
+
+|
+| _060_unlock_page():
+|
+| Entry point for the operating system`s routine to "unlock" a
+| page that has been "locked" previously with _real_lock_page.
+| Note: the routine must unlock two pages if the operand spans
+| two pages.
+| Arguments:
+|	a0 = operand address
+|	d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
+|	d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
+|
+| Linux/m68k: perhaps reenable preemption here...
+
+	.global		_060_real_unlock_page
+_060_real_unlock_page:
+	clr.l		%d0
+	rts
+
+|###########################################################################
+
+|#################################
+| (2) EXAMPLE PACKAGE ENTRY CODE #
+|#################################
+
+	.global		_060_isp_unimp
+_060_isp_unimp:
+	bral		_I_CALL_TOP+0x80+0x00
+
+	.global		_060_isp_cas
+_060_isp_cas:
+	bral		_I_CALL_TOP+0x80+0x08
+
+	.global		_060_isp_cas2
+_060_isp_cas2:
+	bral		_I_CALL_TOP+0x80+0x10
+
+	.global		_060_isp_cas_finish
+_060_isp_cas_finish:
+	bra.l		_I_CALL_TOP+0x80+0x18
+
+	.global		_060_isp_cas2_finish
+_060_isp_cas2_finish:
+	bral		_I_CALL_TOP+0x80+0x20
+
+	.global		_060_isp_cas_inrange
+_060_isp_cas_inrange:
+	bral		_I_CALL_TOP+0x80+0x28
+
+	.global		_060_isp_cas_terminate
+_060_isp_cas_terminate:
+	bral		_I_CALL_TOP+0x80+0x30
+
+	.global		_060_isp_cas_restart
+_060_isp_cas_restart:
+	bral		_I_CALL_TOP+0x80+0x38
+
+|###########################################################################
+
+|###############################
+| (3) EXAMPLE CALL-OUT SECTION #
+|###############################
+
+| The size of this section MUST be 128 bytes!!!
+
+_I_CALL_TOP:
+	.long	_060_real_chk		- _I_CALL_TOP
+	.long	_060_real_divbyzero	- _I_CALL_TOP
+	.long	_060_real_trace		- _I_CALL_TOP
+	.long	_060_real_access	- _I_CALL_TOP
+	.long	_060_isp_done		- _I_CALL_TOP
+
+	.long	_060_real_cas		- _I_CALL_TOP
+	.long	_060_real_cas2		- _I_CALL_TOP
+	.long	_060_real_lock_page	- _I_CALL_TOP
+	.long	_060_real_unlock_page	- _I_CALL_TOP
+
+	.long	0x00000000, 0x00000000, 0x00000000, 0x00000000
+	.long	0x00000000, 0x00000000, 0x00000000
+
+	.long	_060_imem_read		- _I_CALL_TOP
+	.long	_060_dmem_read		- _I_CALL_TOP
+	.long	_060_dmem_write		- _I_CALL_TOP
+	.long	_060_imem_read_word	- _I_CALL_TOP
+	.long	_060_imem_read_long	- _I_CALL_TOP
+	.long	_060_dmem_read_byte	- _I_CALL_TOP
+	.long	_060_dmem_read_word	- _I_CALL_TOP
+	.long	_060_dmem_read_long	- _I_CALL_TOP
+	.long	_060_dmem_write_byte	- _I_CALL_TOP
+	.long	_060_dmem_write_word	- _I_CALL_TOP
+	.long	_060_dmem_write_long	- _I_CALL_TOP
+
+	.long	0x00000000
+	.long	0x00000000, 0x00000000, 0x00000000, 0x00000000
+
+|###########################################################################
+
+| 060 INTEGER KERNEL PACKAGE MUST GO HERE!!!
+#include "isp.sa"