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diff --git a/arch/m68k/ifpsp060/fpsp.doc b/arch/m68k/ifpsp060/fpsp.doc new file mode 100644 index 00000000000..408315209e6 --- /dev/null +++ b/arch/m68k/ifpsp060/fpsp.doc @@ -0,0 +1,295 @@ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +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 FLOATING-POINT SOFTWARE PACKAGE (Kernel version) +------------------------------------------------------- + +The file fpsp.sa contains the 68060 Floating-Point Software +Package. This package is essentially a set of exception handlers +that can be integrated into an operating system. +These exception handlers emulate Unimplemented FP instructions, +instructions using unimplemented data types, and instructions +using unimplemented addressing modes. In addition, this package +includes exception handlers to provide full IEEE-754 compliant +exception handling. + +Release file format: +-------------------- +The file fpsp.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 fpsp.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 fskeleton.s + ----------------- + | | - 8 bytes per entry + (2) | Entry Point | - user does "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 fpsp.sa (an example "Call-out" section is provided at +the end of the file fskeleton.s). The purpose of this section is to allow +the FPSP 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 FPSP (these functions and their location are +listed in "68060FPSP 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 +fpsp.sa image in memory. + +The second section, the "Entry-point" section, is used by external routines +to access the functions within the FPSP. Since the fpsp.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 FPSP 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 "Line-F Emulator" exception +(vector #11), the operating system should execute something similar to: + + bra _060FPSP_TOP+128+48 + +(_060FPSP_TOP is the starting address of the "Call-out" section; the "Call-out" +section is 128 bytes long; and the F-Line FPSP handler entry point is located +48 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. + +68060FPSP call-outs: (details in fskeleton.s) +-------------------- +0x000: _060_real_bsun +0x004: _060_real_snan +0x008: _060_real_operr +0x00c: _060_real_ovfl +0x010: _060_real_unfl +0x014: _060_real_dz +0x018: _060_real_inex +0x01c: _060_real_fline +0x020: _060_real_fpu_disabled +0x024: _060_real_trap +0x028: _060_real_trace +0x02c: _060_real_access +0x030: _060_fpsp_done + +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) + +68060FPSP entry points: +----------------------- +0x000: _060_fpsp_snan +0x008: _060_fpsp_operr +0x010: _060_fpsp_ovfl +0x018: _060_fpsp_unfl +0x020: _060_fpsp_dz +0x028: _060_fpsp_inex +0x030: _060_fpsp_fline +0x038: _060_fpsp_unsupp +0x040: _060_fpsp_effadd + + + +Miscellaneous: +-------------- + +_060_fpsp_snan: +---------------- +- documented in 3.5 of 060SP spec. +- Basic flow: + exception taken ---> enter _060_fpsp_snan --| + | + always exits through _060_real_snan <---- + +_060_fpsp_operr: +---------------- +- documented in 3.5 of 060SP spec. +- Basic flow: + exception taken ---> enter _060_fpsp_operr --| + | + always exits through _060_real_operr <----- + +_060_fpsp_dz: +---------------- +- documented in 3.7 of 060SP spec. +- Basic flow: + exception taken ---> enter _060_fpsp_dz --| + | + always exits through _060_real_dz <---- + +_060_fpsp_inex: +---------------- +- documented in 3.6 of 060SP spec. +- Basic flow: + exception taken ---> enter _060_fpsp_inex --| + | + always exits through _060_real_inex <---- + + +_060_fpsp_ovfl: +---------------- +- documented in 3.4 of 060SP spec. +- Basic flow: + exception taken ---> enter _060_fpsp_ovfl --| + | + may exit through _060_real_inex <---| + or | + may exit through _060_real_ovfl <---| + or | + may exit through _060_fpsp_done <---| + +_060_fpsp_unfl: +---------------- +- documented in 3.4 of 060SP spec. +- Basic flow: + exception taken ---> enter _060_fpsp_unfl --| + | + may exit through _060_real_inex <---| + or | + may exit through _060_real_unfl <---| + or | + may exit through _060_fpsp_done <---| + + +_060_fpsp_fline: +----------------- +- not fully documented in 060SP spec. +- Basic flow: + exception taken ---> enter _060_fpsp_fline --| + | + ------------------------------------------- + | | | + v v v + (unimplemented (fpu disabled) (possible F-line illegal) + stack frame) | v + | v special case "fmovecr"? + | exit through | + | _060_real_fpu_disabled ------------- + | | | + | ^ v v + | | (yes) (no) + | | v v + | | fpu disabled? exit through + | | | _060_real_fline + v | ------------- + | | | | + | | v v + | |-----------(yes) (no) + | | + |----<------------------------------------| + | + | + |----> may exit through _060_real_trace + | + |----> may exit through _060_real_trap + | + |----> may exit through _060_real_bsun + | + |----> may exit through _060_fpsp_done + + +_060_fpsp_unsupp: +------------------ +- documented in 3.1 of 060SP spec. +- Basic flow: + exception taken ---> enter _060_fpsp_unsupp --| + | + | + may exit through _060_real_snan <----| + or | + may exit through _060_real_operr <----| + or | + may exit through _060_real_ovfl <----| + or | + may exit through _060_real_unfl <----| + or | + may exit through _060_real_inex <----| + or | + may exit through _060_real_trace <----| + or | + may exit through _060_fpsp_done <----| + + +_060_fpsp_effadd: +------------------ +- documented in 3.3 of 060 spec. +- Basic flow: + exception taken ---> enter _060_fpsp_effadd --| + | + | + may exit through _060_real_trace <----| + or | + may exit through _060_real_fpu_disabled <----| + or | + may exit through _060_fpsp_done <----| |