patch-1.3.94 linux/arch/m68k/ifpsp060/fskeleton.S

• Lines: 345
• Date: Sun Feb 18 19:32:57 1996
• Orig file: v1.3.93/linux/arch/m68k/ifpsp060/fskeleton.S
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.93/linux/arch/m68k/ifpsp060/fskeleton.S linux/arch/m68k/ifpsp060/fskeleton.S
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+|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+|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.
+|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+| fskeleton.s
+|
+| This file contains:
+|	(1) example "Call-out"s
+|	(2) example package entry code
+|	(3) example "Call-out" table
+|
+
+
+|################################
+| (1) EXAMPLE CALL-OUTS		#
+|				#
+| _060_fpsp_done()		#
+| _060_real_ovfl()		#
+| _060_real_unfl()		#
+| _060_real_operr()		#
+| _060_real_snan()		#
+| _060_real_dz()		#
+| _060_real_inex()		#
+| _060_real_bsun()		#
+| _060_real_fline()		#
+| _060_real_fpu_disabled()	#
+| _060_real_trap()		#
+|################################
+
+|
+| _060_fpsp_done():
+|
+| This is the main exit point for the 68060 Floating-Point
+| Software Package. For a normal exit, all 060FPSP routines call this
+| routine. The operating system can do system dependent clean-up or
+| simply execute an "rte" as with the sample code below.
+|
+	.global		_060_fpsp_done
+_060_fpsp_done:
+	rte
+
+|
+| _060_real_ovfl():
+|
+| This is the exit point for the 060FPSP when an enabled overflow exception
+| is present. The routine below should point to the operating system handler 
+| for enabled overflow conditions. The exception stack frame is an overflow
+| stack frame. The FP state frame holds the EXCEPTIONAL OPERAND.
+|
+| The sample routine below simply clears the exception status bit and
+| does an "rte".
+|
+	.global		_060_real_ovfl
+_060_real_ovfl:
+	fsave		-(%sp)
+	move.w		#0x6000,0x2(%sp)
+	frestore	(%sp)+
+	rte
+
+|
+| _060_real_unfl():
+|
+| This is the exit point for the 060FPSP when an enabled underflow exception
+| is present. The routine below should point to the operating system handler 
+| for enabled underflow conditions. The exception stack frame is an underflow
+| stack frame. The FP state frame holds the EXCEPTIONAL OPERAND.
+|
+| The sample routine below simply clears the exception status bit and
+| does an "rte".
+|
+	.global		_060_real_unfl
+_060_real_unfl:
+	fsave		-(%sp)
+	move.w		#0x6000,0x2(%sp)
+	frestore	(%sp)+
+	rte
+
+|
+| _060_real_operr():
+|
+| This is the exit point for the 060FPSP when an enabled operand error exception
+| is present. The routine below should point to the operating system handler 
+| for enabled operand error exceptions. The exception stack frame is an operand error
+| stack frame. The FP state frame holds the source operand of the faulting
+| instruction.
+|
+| The sample routine below simply clears the exception status bit and
+| does an "rte".
+|
+	.global		_060_real_operr
+_060_real_operr:
+	fsave		-(%sp)
+	move.w		#0x6000,0x2(%sp)
+	frestore	(%sp)+
+	rte
+
+|
+| _060_real_snan():
+|
+| This is the exit point for the 060FPSP when an enabled signalling NaN exception
+| is present. The routine below should point to the operating system handler 
+| for enabled signalling NaN exceptions. The exception stack frame is a signalling NaN
+| stack frame. The FP state frame holds the source operand of the faulting
+| instruction.
+|
+| The sample routine below simply clears the exception status bit and
+| does an "rte".
+|
+	.global		_060_real_snan
+_060_real_snan:
+	fsave		-(%sp)
+	move.w		#0x6000,0x2(%sp)
+	frestore	(%sp)+
+	rte
+
+|
+| _060_real_dz():
+|
+| This is the exit point for the 060FPSP when an enabled divide-by-zero exception
+| is present. The routine below should point to the operating system handler 
+| for enabled divide-by-zero exceptions. The exception stack frame is a divide-by-zero
+| stack frame. The FP state frame holds the source operand of the faulting
+| instruction.
+|
+| The sample routine below simply clears the exception status bit and
+| does an "rte".
+|
+	.global		_060_real_dz
+_060_real_dz:
+	fsave		-(%sp)
+	move.w		#0x6000,0x2(%sp)
+	frestore	(%sp)+
+	rte
+
+|
+| _060_real_inex():
+|
+| This is the exit point for the 060FPSP when an enabled inexact exception
+| is present. The routine below should point to the operating system handler 
+| for enabled inexact exceptions. The exception stack frame is an inexact
+| stack frame. The FP state frame holds the source operand of the faulting
+| instruction.
+|
+| The sample routine below simply clears the exception status bit and
+| does an "rte".
+|
+	.global		_060_real_inex
+_060_real_inex:
+	fsave		-(%sp)
+	move.w		#0x6000,0x2(%sp)
+	frestore	(%sp)+
+	rte
+
+|
+| _060_real_bsun():
+|
+| This is the exit point for the 060FPSP when an enabled bsun exception
+| is present. The routine below should point to the operating system handler 
+| for enabled bsun exceptions. The exception stack frame is a bsun
+| stack frame.
+|
+| The sample routine below clears the exception status bit, clears the NaN
+| bit in the FPSR, and does an "rte". The instruction that caused the 
+| bsun will now be re-executed but with the NaN FPSR bit cleared.
+|
+	.global		_060_real_bsun
+_060_real_bsun:
+	fsave		-(%sp)
+
+	fmove.l		%fpsr,-(%sp)
+	andi.b		#0xfe,(%sp)
+	fmove.l		(%sp)+,%fpsr
+
+	add.l		#0xc,%sp
+	rte
+
+|
+| _060_real_fline():
+|
+| This is the exit point for the 060FPSP when an F-Line Illegal exception is 
+| encountered. Three different types of exceptions can enter the F-Line exception
+| vector number 11: FP Unimplemented Instructions, FP implemented instructions when
+| the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module
+| _fpsp_fline() distinguishes between the three and acts appropriately. F-Line
+| Illegals branch here.
+| 
+	.global		_060_real_fline
+_060_real_fline:
+	bras		_060_real_fline
+
+|
+| _060_real_fpu_disabled():
+|
+| This is the exit point for the 060FPSP when an FPU disabled exception is 
+| encountered. Three different types of exceptions can enter the F-Line exception
+| vector number 11: FP Unimplemented Instructions, FP implemented instructions when
+| the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module
+| _fpsp_fline() distinguishes between the three and acts appropriately. FPU disabled
+| exceptions branch here.
+|
+| The sample code below enables the FPU, sets the PC field in the exception stack
+| frame to the PC of the instruction causing the exception, and does an "rte".
+| The execution of the instruction then proceeds with an enabled floating-point
+| unit.
+|
+	.global		_060_real_fpu_disabled
+_060_real_fpu_disabled:
+	move.l		%d0,-(%sp)		| enabled the fpu
+	.long	0x4E7A0808
+	|movec		pcr,d0
+	bclr		#0x1,%d0
+	.long	0x4E7B0808
+	|movec		%d0,pcr
+	move.l		(%sp)+,%d0
+
+	move.l		0xc(%sp),0x2(%sp)	| set "Current PC"
+	rte
+
+|
+| _060_real_trap():
+|
+| This is the exit point for the 060FPSP when an emulated "ftrapcc" instruction
+| discovers that the trap condition is true and it should branch to the operating
+| system handler for the trap exception vector number 7.
+|
+| The sample code below simply executes an "rte".
+|
+	.global		_060_real_trap
+_060_real_trap:
+	rte
+
+|############################################################################
+
+|#################################
+| (2) EXAMPLE PACKAGE ENTRY CODE #
+|#################################
+
+	.global		_060_fpsp_snan
+_060_fpsp_snan:
+	bra.l		_FP_CALL_TOP+0x80+0x00
+
+	.global		_060_fpsp_operr
+_060_fpsp_operr:
+	bra.l		_FP_CALL_TOP+0x80+0x08
+
+	.global		_060_fpsp_ovfl
+_060_fpsp_ovfl:
+	bra.l		_FP_CALL_TOP+0x80+0x10
+
+	.global		_060_fpsp_unfl
+_060_fpsp_unfl:
+	bra.l		_FP_CALL_TOP+0x80+0x18
+
+	.global		_060_fpsp_dz
+_060_fpsp_dz:
+	bra.l		_FP_CALL_TOP+0x80+0x20
+
+	.global		_060_fpsp_inex
+_060_fpsp_inex:
+	bra.l		_FP_CALL_TOP+0x80+0x28
+
+	.global		_060_fpsp_fline
+_060_fpsp_fline:
+	bra.l		_FP_CALL_TOP+0x80+0x30
+
+	.global		_060_fpsp_unsupp
+_060_fpsp_unsupp:
+	bra.l		_FP_CALL_TOP+0x80+0x38
+
+	.global		_060_fpsp_effadd
+_060_fpsp_effadd:
+	bra.l		_FP_CALL_TOP+0x80+0x40
+
+|############################################################################
+
+|###############################
+| (3) EXAMPLE CALL-OUT SECTION #
+|###############################
+
+| The size of this section MUST be 128 bytes!!!
+
+	.global	_FP_CALL_TOP
+_FP_CALL_TOP:
+	.long	_060_real_bsun		- _FP_CALL_TOP
+	.long	_060_real_snan		- _FP_CALL_TOP
+	.long	_060_real_operr		- _FP_CALL_TOP
+	.long	_060_real_ovfl		- _FP_CALL_TOP
+	.long	_060_real_unfl		- _FP_CALL_TOP
+	.long	_060_real_dz		- _FP_CALL_TOP
+	.long	_060_real_inex		- _FP_CALL_TOP
+	.long	_060_real_fline		- _FP_CALL_TOP
+	.long	_060_real_fpu_disabled	- _FP_CALL_TOP
+	.long	_060_real_trap		- _FP_CALL_TOP
+	.long	_060_real_trace		- _FP_CALL_TOP
+	.long	_060_real_access	- _FP_CALL_TOP
+	.long	_060_fpsp_done		- _FP_CALL_TOP
+
+	.long	0x00000000, 0x00000000, 0x00000000
+
+	.long	_060_imem_read		- _FP_CALL_TOP
+	.long	_060_dmem_read		- _FP_CALL_TOP
+	.long	_060_dmem_write		- _FP_CALL_TOP
+	.long	_060_imem_read_word	- _FP_CALL_TOP
+	.long	_060_imem_read_long	- _FP_CALL_TOP
+	.long	_060_dmem_read_byte	- _FP_CALL_TOP
+	.long	_060_dmem_read_word	- _FP_CALL_TOP
+	.long	_060_dmem_read_long	- _FP_CALL_TOP
+	.long	_060_dmem_write_byte	- _FP_CALL_TOP
+	.long	_060_dmem_write_word	- _FP_CALL_TOP
+	.long	_060_dmem_write_long	- _FP_CALL_TOP
+
+	.long	0x00000000
+
+	.long	0x00000000, 0x00000000, 0x00000000, 0x00000000
+
+|############################################################################
+
+| 060 FPSP KERNEL PACKAGE NEEDS TO GO HERE!!!
+
+	.include "fpsp.sa"