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Diffstat (limited to 'arch/m68k/ifpsp060/iskeleton.S')
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diff --git a/arch/m68k/ifpsp060/iskeleton.S b/arch/m68k/ifpsp060/iskeleton.S new file mode 100644 index 00000000000..803a6ecdda8 --- /dev/null +++ b/arch/m68k/ifpsp060/iskeleton.S @@ -0,0 +1,349 @@ +|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +|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. +|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +| iskeleton.s +| +| This file contains: +| (1) example "Call-out"s +| (2) example package entry code +| (3) example "Call-out" table +| + +#include <linux/linkage.h> +#include <asm/entry.h> +#include <asm/offsets.h> + + +|################################ +| (1) EXAMPLE CALL-OUTS # +| # +| _060_isp_done() # +| _060_real_chk() # +| _060_real_divbyzero() # +| # +| _060_real_cas() # +| _060_real_cas2() # +| _060_real_lock_page() # +| _060_real_unlock_page() # +|################################ + +| +| _060_isp_done(): +| +| This is and example main exit point for the Unimplemented Integer +| Instruction exception handler. For a normal exit, the +| _isp_unimp() branches to here so that the operating system +| can do any clean-up desired. The stack frame is the +| Unimplemented Integer Instruction stack frame with +| the PC pointing to the instruction following the instruction +| just emulated. +| To simply continue execution at the next instruction, just +| do an "rte". +| +| Linux/68k: If returning to user space, check for needed reselections. + + .global _060_isp_done +_060_isp_done: + btst #0x5,%sp@ | supervisor bit set in saved SR? + beq .Lnotkern + rte +.Lnotkern: + SAVE_ALL_INT + GET_CURRENT(%d0) + tstb %curptr@(TASK_NEEDRESCHED) + jne ret_from_exception | deliver signals, + | reschedule etc.. + RESTORE_ALL + +| +| _060_real_chk(): +| +| This is an alternate exit point for the Unimplemented Integer +| Instruction exception handler. If the instruction was a "chk2" +| and the operand was out of bounds, then _isp_unimp() creates +| a CHK exception stack frame from the Unimplemented Integer Instrcution +| stack frame and branches to this routine. +| +| Linux/68k: commented out test for tracing + + .global _060_real_chk +_060_real_chk: +| tst.b (%sp) | is tracing enabled? +| bpls real_chk_end | no + +| +| CHK FRAME TRACE FRAME +| ***************** ***************** +| * Current PC * * Current PC * +| ***************** ***************** +| * 0x2 * 0x018 * * 0x2 * 0x024 * +| ***************** ***************** +| * Next * * Next * +| * PC * * PC * +| ***************** ***************** +| * SR * * SR * +| ***************** ***************** +| +| move.b #0x24,0x7(%sp) | set trace vecno +| bral _060_real_trace + +real_chk_end: + bral trap | jump to trap handler + +| +| _060_real_divbyzero: +| +| This is an alternate exit point for the Unimplemented Integer +| Instruction exception handler isp_unimp(). If the instruction is a 64-bit +| integer divide where the source operand is a zero, then the _isp_unimp() +| creates a Divide-by-zero exception stack frame from the Unimplemented +| Integer Instruction stack frame and branches to this routine. +| +| Remember that a trace exception may be pending. The code below performs +| no action associated with the "chk" exception. If tracing is enabled, +| then it create a Trace exception stack frame from the "chk" exception +| stack frame and branches to the _real_trace() entry point. +| +| Linux/68k: commented out test for tracing + + .global _060_real_divbyzero +_060_real_divbyzero: +| tst.b (%sp) | is tracing enabled? +| bpls real_divbyzero_end | no + +| +| DIVBYZERO FRAME TRACE FRAME +| ***************** ***************** +| * Current PC * * Current PC * +| ***************** ***************** +| * 0x2 * 0x014 * * 0x2 * 0x024 * +| ***************** ***************** +| * Next * * Next * +| * PC * * PC * +| ***************** ***************** +| * SR * * SR * +| ***************** ***************** +| +| move.b #0x24,0x7(%sp) | set trace vecno +| bral _060_real_trace + +real_divbyzero_end: + bral trap | jump to trap handler + +|########################## + +| +| _060_real_cas(): +| +| Entry point for the selected cas emulation code implementation. +| If the implementation provided by the 68060ISP is sufficient, +| then this routine simply re-enters the package through _isp_cas. +| + .global _060_real_cas +_060_real_cas: + bral _I_CALL_TOP+0x80+0x08 + +| +| _060_real_cas2(): +| +| Entry point for the selected cas2 emulation code implementation. +| If the implementation provided by the 68060ISP is sufficient, +| then this routine simply re-enters the package through _isp_cas2. +| + .global _060_real_cas2 +_060_real_cas2: + bral _I_CALL_TOP+0x80+0x10 + +| +| _060_lock_page(): +| +| Entry point for the operating system`s routine to "lock" a page +| from being paged out. This routine is needed by the cas/cas2 +| algorithms so that no page faults occur within the "core" code +| region. Note: the routine must lock two pages if the operand +| spans two pages. +| NOTE: THE ROUTINE SHOULD RETURN AN FSLW VALUE IN D0 ON FAILURE +| SO THAT THE 060SP CAN CREATE A PROPER ACCESS ERROR FRAME. +| Arguments: +| a0 = operand address +| d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user +| d1 = `xxxxxxff -> longword; `xxxxxx00 -> word +| Expected outputs: +| d0 = 0 -> success; non-zero -> failure +| +| Linux/m68k: Make sure the page is properly paged in, so we use +| plpaw and handle any exception here. The kernel must not be +| preempted until _060_unlock_page(), so that the page stays mapped. +| + .global _060_real_lock_page +_060_real_lock_page: + move.l %d2,-(%sp) + | load sfc/dfc + tst.b %d0 + jne 1f + moveq #1,%d0 + jra 2f +1: moveq #5,%d0 +2: movec.l %dfc,%d2 + movec.l %d0,%dfc + movec.l %d0,%sfc + + clr.l %d0 + | prefetch address + .chip 68060 + move.l %a0,%a1 +1: plpaw (%a1) + addq.w #1,%a0 + tst.b %d1 + jeq 2f + addq.w #2,%a0 +2: plpaw (%a0) +3: .chip 68k + + | restore sfc/dfc + movec.l %d2,%dfc + movec.l %d2,%sfc + move.l (%sp)+,%d2 + rts + +.section __ex_table,"a" + .align 4 + .long 1b,11f + .long 2b,21f +.previous +.section .fixup,"ax" + .even +11: move.l #0x020003c0,%d0 + or.l %d2,%d0 + swap %d0 + jra 3b +21: move.l #0x02000bc0,%d0 + or.l %d2,%d0 + swap %d0 + jra 3b +.previous + +| +| _060_unlock_page(): +| +| Entry point for the operating system`s routine to "unlock" a +| page that has been "locked" previously with _real_lock_page. +| Note: the routine must unlock two pages if the operand spans +| two pages. +| Arguments: +| a0 = operand address +| d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user +| d1 = `xxxxxxff -> longword; `xxxxxx00 -> word +| +| Linux/m68k: perhaps reenable preemption here... + + .global _060_real_unlock_page +_060_real_unlock_page: + clr.l %d0 + rts + +|########################################################################### + +|################################# +| (2) EXAMPLE PACKAGE ENTRY CODE # +|################################# + + .global _060_isp_unimp +_060_isp_unimp: + bral _I_CALL_TOP+0x80+0x00 + + .global _060_isp_cas +_060_isp_cas: + bral _I_CALL_TOP+0x80+0x08 + + .global _060_isp_cas2 +_060_isp_cas2: + bral _I_CALL_TOP+0x80+0x10 + + .global _060_isp_cas_finish +_060_isp_cas_finish: + bra.l _I_CALL_TOP+0x80+0x18 + + .global _060_isp_cas2_finish +_060_isp_cas2_finish: + bral _I_CALL_TOP+0x80+0x20 + + .global _060_isp_cas_inrange +_060_isp_cas_inrange: + bral _I_CALL_TOP+0x80+0x28 + + .global _060_isp_cas_terminate +_060_isp_cas_terminate: + bral _I_CALL_TOP+0x80+0x30 + + .global _060_isp_cas_restart +_060_isp_cas_restart: + bral _I_CALL_TOP+0x80+0x38 + +|########################################################################### + +|############################### +| (3) EXAMPLE CALL-OUT SECTION # +|############################### + +| The size of this section MUST be 128 bytes!!! + +_I_CALL_TOP: + .long _060_real_chk - _I_CALL_TOP + .long _060_real_divbyzero - _I_CALL_TOP + .long _060_real_trace - _I_CALL_TOP + .long _060_real_access - _I_CALL_TOP + .long _060_isp_done - _I_CALL_TOP + + .long _060_real_cas - _I_CALL_TOP + .long _060_real_cas2 - _I_CALL_TOP + .long _060_real_lock_page - _I_CALL_TOP + .long _060_real_unlock_page - _I_CALL_TOP + + .long 0x00000000, 0x00000000, 0x00000000, 0x00000000 + .long 0x00000000, 0x00000000, 0x00000000 + + .long _060_imem_read - _I_CALL_TOP + .long _060_dmem_read - _I_CALL_TOP + .long _060_dmem_write - _I_CALL_TOP + .long _060_imem_read_word - _I_CALL_TOP + .long _060_imem_read_long - _I_CALL_TOP + .long _060_dmem_read_byte - _I_CALL_TOP + .long _060_dmem_read_word - _I_CALL_TOP + .long _060_dmem_read_long - _I_CALL_TOP + .long _060_dmem_write_byte - _I_CALL_TOP + .long _060_dmem_write_word - _I_CALL_TOP + .long _060_dmem_write_long - _I_CALL_TOP + + .long 0x00000000 + .long 0x00000000, 0x00000000, 0x00000000, 0x00000000 + +|########################################################################### + +| 060 INTEGER KERNEL PACKAGE MUST GO HERE!!! +#include "isp.sa" |