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295 lines
10 KiB
295 lines
10 KiB
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP |
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M68000 Hi-Performance Microprocessor Division |
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M68060 Software Package |
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Production Release P1.00 -- October 10, 1994 |
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M68060 Software Package Copyright © 1993, 1994 Motorola Inc. All rights reserved. |
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THE SOFTWARE is provided on an "AS IS" basis and without warranty. |
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To the maximum extent permitted by applicable law, |
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MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, |
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INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE |
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and any warranty against infringement with regard to the SOFTWARE |
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(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials. |
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To the maximum extent permitted by applicable law, |
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IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER |
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(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, |
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BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS) |
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ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE. |
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Motorola assumes no responsibility for the maintenance and support of the SOFTWARE. |
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You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE |
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so long as this entire notice is retained without alteration in any modified and/or |
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redistributed versions, and that such modified versions are clearly identified as such. |
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No licenses are granted by implication, estoppel or otherwise under any patents |
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or trademarks of Motorola, Inc. |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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68060 FLOATING-POINT SOFTWARE PACKAGE (Kernel version) |
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------------------------------------------------------- |
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The file fpsp.sa contains the 68060 Floating-Point Software |
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Package. This package is essentially a set of exception handlers |
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that can be integrated into an operating system. |
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These exception handlers emulate Unimplemented FP instructions, |
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instructions using unimplemented data types, and instructions |
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using unimplemented addressing modes. In addition, this package |
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includes exception handlers to provide full IEEE-754 compliant |
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exception handling. |
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Release file format: |
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-------------------- |
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The file fpsp.sa is essentially a hexadecimal image of the |
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release package. This is the ONLY format which will be supported. |
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The hex image was created by assembling the source code and |
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then converting the resulting binary output image into an |
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ASCII text file. The hexadecimal numbers are listed |
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using the Motorola Assembly Syntax assembler directive "dc.l" |
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(define constant longword). The file can be converted to other |
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assembly syntaxes by using any word processor with a global |
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search and replace function. |
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To assist in assembling and linking this module with other modules, |
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the installer should add a symbolic label to the top of the file. |
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This will allow calling routines to access the entry points |
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of this package. |
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The source code fpsp.s has also been included but only for |
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documentation purposes. |
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Release file structure: |
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----------------------- |
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(top of module) |
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----------------- |
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| | - 128 byte-sized section |
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(1) | Call-Out | - 4 bytes per entry (user fills these in) |
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| | - example routines in fskeleton.s |
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----------------- |
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| | - 8 bytes per entry |
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(2) | Entry Point | - user does "bra" or "jmp" to this address |
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| | |
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----------------- |
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| | - code section |
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(3) ~ ~ |
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| | |
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----------------- |
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(bottom of module) |
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The first section of this module is the "Call-out" section. This section |
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is NOT INCLUDED in fpsp.sa (an example "Call-out" section is provided at |
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the end of the file fskeleton.s). The purpose of this section is to allow |
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the FPSP routines to reference external functions that must be provided |
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by the host operating system. This section MUST be exactly 128 bytes in |
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size. There are 32 fields, each 4 bytes in size. Each field corresponds |
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to a function required by the FPSP (these functions and their location are |
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listed in "68060FPSP call-outs" below). Each field entry should contain |
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the address of the corresponding function RELATIVE to the starting address |
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of the "call-out" section. The "Call-out" section must sit adjacent to the |
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fpsp.sa image in memory. |
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The second section, the "Entry-point" section, is used by external routines |
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to access the functions within the FPSP. Since the fpsp.sa hex file contains |
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no symbol names, this section contains function entry points that are fixed |
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with respect to the top of the package. The currently defined entry-points |
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are listed in section "68060 FPSP entry points" below. A calling routine |
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would simply execute a "bra" or "jmp" that jumped to the selected function |
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entry-point. |
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For example, if the 68060 hardware took a "Line-F Emulator" exception |
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(vector #11), the operating system should execute something similar to: |
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bra _060FPSP_TOP+128+48 |
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(_060FPSP_TOP is the starting address of the "Call-out" section; the "Call-out" |
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section is 128 bytes long; and the F-Line FPSP handler entry point is located |
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48 bytes from the top of the "Entry-point" section.) |
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The third section is the code section. After entering through an "Entry-point", |
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the entry code jumps to the appropriate emulation code within the code section. |
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68060FPSP call-outs: (details in fskeleton.s) |
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-------------------- |
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0x000: _060_real_bsun |
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0x004: _060_real_snan |
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0x008: _060_real_operr |
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0x00c: _060_real_ovfl |
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0x010: _060_real_unfl |
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0x014: _060_real_dz |
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0x018: _060_real_inex |
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0x01c: _060_real_fline |
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0x020: _060_real_fpu_disabled |
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0x024: _060_real_trap |
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0x028: _060_real_trace |
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0x02c: _060_real_access |
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0x030: _060_fpsp_done |
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0x034: (Motorola reserved) |
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0x038: (Motorola reserved) |
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0x03c: (Motorola reserved) |
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0x040: _060_imem_read |
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0x044: _060_dmem_read |
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0x048: _060_dmem_write |
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0x04c: _060_imem_read_word |
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0x050: _060_imem_read_long |
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0x054: _060_dmem_read_byte |
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0x058: _060_dmem_read_word |
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0x05c: _060_dmem_read_long |
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0x060: _060_dmem_write_byte |
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0x064: _060_dmem_write_word |
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0x068: _060_dmem_write_long |
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0x06c: (Motorola reserved) |
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0x070: (Motorola reserved) |
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0x074: (Motorola reserved) |
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0x078: (Motorola reserved) |
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0x07c: (Motorola reserved) |
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68060FPSP entry points: |
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----------------------- |
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0x000: _060_fpsp_snan |
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0x008: _060_fpsp_operr |
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0x010: _060_fpsp_ovfl |
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0x018: _060_fpsp_unfl |
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0x020: _060_fpsp_dz |
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0x028: _060_fpsp_inex |
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0x030: _060_fpsp_fline |
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0x038: _060_fpsp_unsupp |
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0x040: _060_fpsp_effadd |
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Miscellaneous: |
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-------------- |
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_060_fpsp_snan: |
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---------------- |
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- documented in 3.5 of 060SP spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_snan --| |
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always exits through _060_real_snan <---- |
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_060_fpsp_operr: |
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---------------- |
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- documented in 3.5 of 060SP spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_operr --| |
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always exits through _060_real_operr <----- |
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_060_fpsp_dz: |
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---------------- |
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- documented in 3.7 of 060SP spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_dz --| |
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always exits through _060_real_dz <---- |
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_060_fpsp_inex: |
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---------------- |
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- documented in 3.6 of 060SP spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_inex --| |
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always exits through _060_real_inex <---- |
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_060_fpsp_ovfl: |
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---------------- |
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- documented in 3.4 of 060SP spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_ovfl --| |
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may exit through _060_real_inex <---| |
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or | |
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may exit through _060_real_ovfl <---| |
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or | |
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may exit through _060_fpsp_done <---| |
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_060_fpsp_unfl: |
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---------------- |
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- documented in 3.4 of 060SP spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_unfl --| |
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may exit through _060_real_inex <---| |
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or | |
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may exit through _060_real_unfl <---| |
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or | |
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may exit through _060_fpsp_done <---| |
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_060_fpsp_fline: |
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----------------- |
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- not fully documented in 060SP spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_fline --| |
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------------------------------------------- |
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| | | |
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v v v |
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(unimplemented (fpu disabled) (possible F-line illegal) |
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stack frame) | v |
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| v special case "fmovecr"? |
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| exit through | |
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| _060_real_fpu_disabled ------------- |
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| | | |
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| ^ v v |
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| | (yes) (no) |
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| | v v |
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| | fpu disabled? exit through |
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| | | _060_real_fline |
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v | ------------- |
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| | | | |
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| | v v |
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| |-----------(yes) (no) |
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| | |
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|----<------------------------------------| |
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|----> may exit through _060_real_trace |
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| |
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|----> may exit through _060_real_trap |
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| |
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|----> may exit through _060_real_bsun |
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|----> may exit through _060_fpsp_done |
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_060_fpsp_unsupp: |
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------------------ |
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- documented in 3.1 of 060SP spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_unsupp --| |
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may exit through _060_real_snan <----| |
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or | |
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may exit through _060_real_operr <----| |
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or | |
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may exit through _060_real_ovfl <----| |
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or | |
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may exit through _060_real_unfl <----| |
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or | |
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may exit through _060_real_inex <----| |
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or | |
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may exit through _060_real_trace <----| |
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or | |
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may exit through _060_fpsp_done <----| |
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_060_fpsp_effadd: |
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------------------ |
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- documented in 3.3 of 060 spec. |
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- Basic flow: |
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exception taken ---> enter _060_fpsp_effadd --| |
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may exit through _060_real_trace <----| |
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or | |
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may exit through _060_real_fpu_disabled <----| |
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or | |
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may exit through _060_fpsp_done <----|
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