forked from Minki/linux
121 lines
4.6 KiB
Plaintext
121 lines
4.6 KiB
Plaintext
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|||
|
|
MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
|
|||
|
|
M68000 Hi-Performance Microprocessor Division
|
|||
|
|
M68060 Software Package
|
|||
|
|
Production Release P1.00 -- October 10, 1994
|
|||
|
|
|
|||
|
|
M68060 Software Package Copyright <20> 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.
|
|||
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|||
|
|
|
|||
|
|
CHANGES SINCE LAST RELEASE:
|
|||
|
|
---------------------------
|
|||
|
|
|
|||
|
|
1) "movep" emulation where data was being read from memory
|
|||
|
|
was reading the intermediate bytes. Emulation now only
|
|||
|
|
reads the required bytes.
|
|||
|
|
|
|||
|
|
2) "flogn", "flog2", and "flog10" of "1" was setting the
|
|||
|
|
Inexact FPSR bit. Emulation now does not set Inexact for
|
|||
|
|
this case.
|
|||
|
|
|
|||
|
|
3) For an opclass three FP instruction where the effective addressing
|
|||
|
|
mode was pre-decrement or post-increment and the address register
|
|||
|
|
was A0 or A1, the address register was not being updated as a result
|
|||
|
|
of the operation. This has been corrected.
|
|||
|
|
|
|||
|
|
4) Beta B.2 version had the following erratum:
|
|||
|
|
|
|||
|
|
Scenario:
|
|||
|
|
---------
|
|||
|
|
If {i,d}mem_{read,write}_{byte,word,long}() returns
|
|||
|
|
a failing value to the 68060SP, the package ignores
|
|||
|
|
this return value and continues with program execution
|
|||
|
|
as if it never received a failing value.
|
|||
|
|
|
|||
|
|
Effect:
|
|||
|
|
-------
|
|||
|
|
For example, if a user executed "fsin.x ADDR,fp0" where
|
|||
|
|
ADDR should cause a "segmentation violation", the memory read
|
|||
|
|
requested by the package should return a failing value
|
|||
|
|
to the package. Since the package currently ignores this
|
|||
|
|
return value, the user program will continue to the
|
|||
|
|
next instruction, and the result created in fp0 will be
|
|||
|
|
undefined.
|
|||
|
|
|
|||
|
|
Fix:
|
|||
|
|
----
|
|||
|
|
This has been fixed in the current release.
|
|||
|
|
|
|||
|
|
Notes:
|
|||
|
|
------
|
|||
|
|
Upon receiving a non-zero (failing) return value from
|
|||
|
|
a {i,d}mem_{read,write}_{byte,word,long}() "call-out",
|
|||
|
|
the package creates a 16-byte access error stack frame
|
|||
|
|
from the current exception stack frame and exits
|
|||
|
|
through the "call-out" _real_access(). This is the process
|
|||
|
|
as described in the MC68060 User's Manual.
|
|||
|
|
|
|||
|
|
For instruction read access errors, the info stacked is:
|
|||
|
|
SR = SR at time of exception
|
|||
|
|
PC = PC of instruction being emulated
|
|||
|
|
VOFF = $4008 (stack frame format type)
|
|||
|
|
ADDRESS = PC of instruction being emulated
|
|||
|
|
FSLW = FAULT STATUS LONGWORD
|
|||
|
|
|
|||
|
|
The valid FSLW bits are:
|
|||
|
|
bit 27 = 1 (misaligned bit)
|
|||
|
|
bit 24 = 1 (read)
|
|||
|
|
bit 23 = 0 (write)
|
|||
|
|
bit 22:21 = 10 (SIZE = word)
|
|||
|
|
bit 20:19 = 00 (TT)
|
|||
|
|
bit 18:16 = x10 (TM; x = 1 for supervisor mode)
|
|||
|
|
bit 15 = 1 (IO)
|
|||
|
|
bit 0 = 1 (Software Emulation Error)
|
|||
|
|
|
|||
|
|
all other bits are EQUAL TO ZERO and can be set by the _real_access()
|
|||
|
|
"call-out" stub by the user as appropriate. The MC68060 User's Manual
|
|||
|
|
stated that ONLY "bit 0" would be set. The 060SP attempts to set a few
|
|||
|
|
other bits.
|
|||
|
|
|
|||
|
|
For data read/write access errors, the info stacked is:
|
|||
|
|
SR = SR at time of exception
|
|||
|
|
PC = PC of instruction being emulated
|
|||
|
|
VOFF = $4008 (stack frame format type)
|
|||
|
|
ADDRESS = Address of source or destination operand
|
|||
|
|
FSLW = FAULT STATUS LONGWORD
|
|||
|
|
|
|||
|
|
The valid FSLW bits are:
|
|||
|
|
bit 27 = 0 (misaligned bit)
|
|||
|
|
bit 24 = x (read; 1 if read, 0 if write)
|
|||
|
|
bit 23 = x (write; 1 if write, 0 if read)
|
|||
|
|
bit 22:21 = xx (SIZE; see MC68060 User's Manual)
|
|||
|
|
bit 20:19 = 00 (TT)
|
|||
|
|
bit 18:16 = x01 (TM; x = 1 for supervisor mode)
|
|||
|
|
bit 15 = 0 (IO)
|
|||
|
|
bit 0 = 1 (Software Emulation Error)
|
|||
|
|
|
|||
|
|
all other bits are EQUAL TO ZERO and can be set by the _real_access()
|
|||
|
|
"call-out" stub by the user as appropriate. The MC68060 User's Manual
|
|||
|
|
stated that ONLY "bit 0" would be set. The 060SP attempts to set a few
|
|||
|
|
other bits.
|