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Diffstat (limited to 'arch/m68k/ifpsp060/CHANGES')
| -rw-r--r-- | arch/m68k/ifpsp060/CHANGES | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/arch/m68k/ifpsp060/CHANGES b/arch/m68k/ifpsp060/CHANGES new file mode 100644 index 0000000..c1e712d --- /dev/null +++ b/arch/m68k/ifpsp060/CHANGES @@ -0,0 +1,120 @@ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +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. +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +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. |
