CVS commit: src/sys/arch/luna68k/luna68k

Module Name:	src
Committed By:	thorpej
Date:		Sun Mar 15 17:54:54 UTC 2026

Modified Files:
	src/sys/arch/luna68k/luna68k: genassym.cf

Log Message:
Clean-up / consolidation of m68k bus error / address error handling
code.  This is not a very radical change for most m68k platforms,
since they were using a version of this re-factored code already via
an #include directive in locore.s.  Now, however, the bus error handlers
are split into CPU "generation"-specific files, and brought into the
kernel via the CPU options in the kernel config file (the goal being
to reduce boilerplate in each locore.s).

The more notable changes:
- amiga and atari no longer have their own copy of each handler, and
  some of their local tweaks have been folded into the shared code.
- sun2's bus error handling code has been re-factored into a shared
  buserr_10.s to facilitate support for other 68010-based systems (all
  of which have their own custom MMU).
- sun3's bus error handling code has been re-refactored into the
  shared buserr_2030.s.  The Sun3-specific MMU handling is treated
  just like the HP-specific MMU handling that was already there.
  This additional #ifdef is a small price to pay for more code sharing.
- sun3x now also uses the shared buserr_2030.s rather than an identical
  local copy of the 68030 MMU handling.

Other minor changes:
- Get rid of magic numbers used a trap frame offsets in the bus error
  handlers; provide proper assym.h constants for them, and add comments
  to each handler describing which format(s) the CPU will use (68010
  uses Format 8, 68020 and 68030 use Format A or Format B depending
  on whether or not the error occurred on an instruction boundary,
  68040 and 68060 use Format 2 for address error, 68040 uses Format 7
  for bus error and 68060 uses Format 4).
- No longer a need for MACHINE_BUSERR_HANDLER or MACHINE_ADDRERR_HANDLER
  hooks, so go ahead and garbage-collect those.


To generate a diff of this commit:
cvs rdiff -u -r1.30 -r1.31 src/sys/arch/luna68k/luna68k/genassym.cf

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.