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linux/arch/m68k/ifpsp060/fskeleton.S
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

343 lines
10 KiB
ArmAsm
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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
|
#include <linux/linkage.h>
|################################
| (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:
bral _060_isp_done | do the same as isp_done
|
| _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)+
bral trap | jump to trap handler
|
| _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)+
bral trap | jump to trap handler
|
| _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)+
bral trap | jump to trap handler
|
| _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)+
bral trap | jump to trap handler
|
| _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)+
bral trap | jump to trap handler
|
| _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)+
bral trap | jump to trap handler
|
| _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
bral trap | jump to trap handler
|
| _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:
bral trap | jump to trap handler
|
| _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:
bral trap | jump to trap handler
|############################################################################
|#################################
| (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!!!
_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"
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