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+|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+|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"