1da177e4c3
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!
218 lines
8.4 KiB
Text
218 lines
8.4 KiB
Text
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
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.
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
68060 INTEGER SOFTWARE PACKAGE (Kernel version)
|
|
------------------------------------------------
|
|
|
|
The file isp.sa contains the 68060 Integer Software Package.
|
|
This package is essentially an exception handler that can be
|
|
integrated into an operating system to handle the "Unimplemented
|
|
Integer Instruction" exception vector #61.
|
|
This exception is taken when any of the integer instructions
|
|
not hardware implemented on the 68060 are encountered. The
|
|
isp.sa provides full emulation support for these instructions.
|
|
|
|
The unimplemented integer instructions are:
|
|
64-bit divide
|
|
64-bit multiply
|
|
movep
|
|
cmp2
|
|
chk2
|
|
cas (w/ a misaligned effective address)
|
|
cas2
|
|
|
|
Release file format:
|
|
--------------------
|
|
The file isp.sa is essentially a hexadecimal image of the
|
|
release package. This is the ONLY format which will be supported.
|
|
The hex image was created by assembling the source code and
|
|
then converting the resulting binary output image into an
|
|
ASCII text file. The hexadecimal numbers are listed
|
|
using the Motorola Assembly Syntax assembler directive "dc.l"
|
|
(define constant longword). The file can be converted to other
|
|
assembly syntaxes by using any word processor with a global
|
|
search and replace function.
|
|
|
|
To assist in assembling and linking this module with other modules,
|
|
the installer should add a symbolic label to the top of the file.
|
|
This will allow calling routines to access the entry points
|
|
of this package.
|
|
|
|
The source code isp.s has also been included but only for
|
|
documentation purposes.
|
|
|
|
Release file structure:
|
|
-----------------------
|
|
|
|
(top of module)
|
|
-----------------
|
|
| | - 128 byte-sized section
|
|
(1) | Call-Out | - 4 bytes per entry (user fills these in)
|
|
| | - example routines in iskeleton.s
|
|
-----------------
|
|
| | - 8 bytes per entry
|
|
(2) | Entry Point | - user does a "bra" or "jmp" to this address
|
|
| |
|
|
-----------------
|
|
| | - code section
|
|
(3) ~ ~
|
|
| |
|
|
-----------------
|
|
(bottom of module)
|
|
|
|
The first section of this module is the "Call-out" section. This section
|
|
is NOT INCLUDED in isp.sa (an example "Call-out" section is provided at
|
|
the end of the file iskeleton.s). The purpose of this section is to allow
|
|
the ISP routines to reference external functions that must be provided
|
|
by the host operating system. This section MUST be exactly 128 bytes in
|
|
size. There are 32 fields, each 4 bytes in size. Each field corresponds
|
|
to a function required by the ISP (these functions and their location are
|
|
listed in "68060ISP call-outs" below). Each field entry should contain
|
|
the address of the corresponding function RELATIVE to the starting address
|
|
of the "call-out" section. The "Call-out" section must sit adjacent to the
|
|
isp.sa image in memory.
|
|
|
|
The second section, the "Entry-point" section, is used by external routines
|
|
to access the functions within the ISP. Since the isp.sa hex file contains
|
|
no symbol names, this section contains function entry points that are fixed
|
|
with respect to the top of the package. The currently defined entry-points
|
|
are listed in section "68060 ISP entry points" below. A calling routine
|
|
would simply execute a "bra" or "jmp" that jumped to the selected function
|
|
entry-point.
|
|
|
|
For example, if the 68060 hardware took a "Unimplemented Integer Instruction"
|
|
exception (vector #61), the operating system should execute something
|
|
similar to:
|
|
|
|
bra _060ISP_TOP+128+0
|
|
|
|
(_060ISP_TOP is the starting address of the "Call-out" section; the "Call-out"
|
|
section is 128 bytes long; and the Unimplemented Integer ISP handler entry
|
|
point is located 0 bytes from the top of the "Entry-point" section.)
|
|
|
|
The third section is the code section. After entering through an "Entry-point",
|
|
the entry code jumps to the appropriate emulation code within the code section.
|
|
|
|
68060ISP call-outs: (details in iskeleton.s)
|
|
--------------------
|
|
0x000: _060_real_chk
|
|
0x004: _060_real_divbyzero
|
|
0x008: _060_real_trace
|
|
0x00c: _060_real_access
|
|
0x010: _060_isp_done
|
|
|
|
0x014: _060_real_cas
|
|
0x018: _060_real_cas2
|
|
0x01c: _060_real_lock_page
|
|
0x020: _060_real_unlock_page
|
|
|
|
0x024: (Motorola reserved)
|
|
0x028: (Motorola reserved)
|
|
0x02c: (Motorola reserved)
|
|
0x030: (Motorola reserved)
|
|
0x034: (Motorola reserved)
|
|
0x038: (Motorola reserved)
|
|
0x03c: (Motorola reserved)
|
|
|
|
0x040: _060_imem_read
|
|
0x044: _060_dmem_read
|
|
0x048: _060_dmem_write
|
|
0x04c: _060_imem_read_word
|
|
0x050: _060_imem_read_long
|
|
0x054: _060_dmem_read_byte
|
|
0x058: _060_dmem_read_word
|
|
0x05c: _060_dmem_read_long
|
|
0x060: _060_dmem_write_byte
|
|
0x064: _060_dmem_write_word
|
|
0x068: _060_dmem_write_long
|
|
|
|
0x06c: (Motorola reserved)
|
|
0x070: (Motorola reserved)
|
|
0x074: (Motorola reserved)
|
|
0x078: (Motorola reserved)
|
|
0x07c: (Motorola reserved)
|
|
|
|
68060ISP entry points:
|
|
-----------------------
|
|
0x000: _060_isp_unimp
|
|
|
|
0x008: _060_isp_cas
|
|
0x010: _060_isp_cas2
|
|
0x018: _060_isp_cas_finish
|
|
0x020: _060_isp_cas2_finish
|
|
0x028: _060_isp_cas_inrange
|
|
0x030: _060_isp_cas_terminate
|
|
0x038: _060_isp_cas_restart
|
|
|
|
Integrating cas/cas2:
|
|
---------------------
|
|
The instructions "cas2" and "cas" (when used with a misaligned effective
|
|
address) take the Unimplemented Integer Instruction exception. When the
|
|
060ISP is installed properly, these instructions will enter through the
|
|
_060_isp_unimp() entry point of the ISP.
|
|
|
|
After the 060ISP decodes the instruction type and fetches the appropriate
|
|
data registers, and BEFORE the actual emulated transfers occur, the
|
|
package calls either the "Call-out" _060_real_cas() or _060_real_cas2().
|
|
If the emulation code provided by the 060ISP is sufficient for the
|
|
host system (see isp.s source code), then these "Call-out"s should be
|
|
made, by the system integrator, to point directly back into the package
|
|
through the "Entry-point"s _060_isp_cas() or _060_isp_cas2().
|
|
|
|
One other necessary action by the integrator is to supply the routines
|
|
_060_real_lock_page() and _060_real_unlock_page(). These functions are
|
|
defined further in iskeleton.s and the 68060 Software Package Specification.
|
|
|
|
If the "core" emulation routines of either "cas" or "cas2" perform some
|
|
actions which are too system-specific, then the system integrator must
|
|
supply new emulation code. This new emulation code should reside within
|
|
the functions _060_real_cas() or _060_real_cas2(). When this new emulation
|
|
code has completed, then it should re-enter the 060ISP package through the
|
|
"Entry-point" _060_isp_cas_finish() or _060_isp_cas2_finish().
|
|
To see what the register state is upon entering _060_real_cas() or
|
|
_060_real_cas2() and what it should be upon return to the package through
|
|
_060_isp_cas_finish() or _060_isp_cas2_finish(), please refer to the
|
|
source code in isp.s.
|
|
|
|
Miscellaneous:
|
|
--------------
|
|
|
|
_060_isp_unimp:
|
|
----------------
|
|
- documented in 2.2 in spec.
|
|
- Basic flow:
|
|
exception taken ---> enter _060_isp_unimp --|
|
|
|
|
|
|
|
|
may exit through _060_real_itrace <----|
|
|
or |
|
|
may exit through _060_real_chk <----|
|
|
or |
|
|
may exit through _060_real_divbyzero <----|
|
|
or |
|
|
may exit through _060_isp_done <----|
|