Switch the sun68k platforms over to the common m68k vector table.

Fix various typos of "system" in comments. Mainly copypasto errors.

from vezhlys on freenode.

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)

branches: 1.40.28; 1.40.30;
Tab/whitespace cleanup.

branches: 1.39.2; 1.39.4;
Appease gcc -fno-common:
- initialize cn_tab in locore2.c:_bootstrap() for early printf calls
Tested on sun3 (3/160 on TME) and sun3x (real 3/80).

XXX: sun3 with >16MB RAM gets "panic: ubc_init: failed to map ubc_object"

branches: 1.38.12;
Cast a vaddr_t to void* before passing to memset, so that this builds again.

- Use uvm_lwp_setuarea() instead of directly setting address to lwp_t::l_addr.
- Replace most remaining uses of l_addr with uvm_lwp_getuarea() or lwp_getpcb().
- Amend assembly in ports where it accesses PCB via struct user.
- Rename L_ADDR to L_PCB in few places. Reduce sys/user.h inclusions.

Kill proc0paddr. Use lwp0.l_addr instead.

Use lwp_getpcb() on sparc{64} and sun2/3 MD code, clean from struct user usage.

Remove clause 3 and 4 from TNF licenses

branches: 1.33.40; 1.33.42; 1.33.44;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.32.4;
First attempt at bus_space(9) support for sun3 with common sun68k/bus.c:
- make sun3 port use common sun68k files as much as possible
- add temporary options _SUN2_ in std.sun2 until sun3 can share all
sun68k files (autoconf.c and isr.c are not yet)
- move sun68kvme declaration temporary as well from files.sun68k to files.sun2
- rename and move sun68k_find_prom_map() function to MD sources since it
can't be shared with sun3
- add bus tag members to struct confargs and initilize them where appropriate

XXX1: MD bus_dma(9) backends are not implemented (yet).
XXX2: more code (obio etc.) should be shared among sun3, sun3x and sun2.

branches: 1.31.20; 1.31.22;
merge ktrace-lwp.

branches: 1.30.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.29.8;
__KERNEL_RCSID()

branches: 1.28.2;
Merge the nathanw_sa branch.

G/c vestiges of old sun3-specific SYMTAB_SPACE support.

branches: 1.26.6; 1.26.14;
bcopy() -> memcpy(), bzero() -> memset()

- vm_offset_t -> [pv]addr_t
- vm_size_t -> vsize_t
- remove register prefixes

branches: 1.24.4;
switch sun3 to ELF. highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return values in %a0 instead of %d0.
C symbols no longer prepend an underscore, adjust assembly code for this.
32-bit values are now 32-bit aligned instead of 16-bit aligned,
adjust structure packing and padding to override this where necessary.
make EXEC_ELF std, make EXEC_AOUT and COMPAT_AOUT_M68K optional.
use the MI loadfile() instead of several home-grown versions.

Use macro in <m68k/m68k.h> for cputype and mmutype.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

branches: 1.21.14;
defopt DDB.

Sync with the sun3 version.

Merge arch/sun3x into arch/sun3

branches: 1.18.4;
Move the call to cninit() up a level (easier to find).

branches: 1.17.4;
s/_round_page/m68k_round_page/

Remove call to leds_init (it is already in obio_init).

Add call to leds_init() after everything has started up ok.

Move the _verify_hardware() work into machdep.c:identifycpu().
Call obio_init() after _vm_init() so we can use peek_byte() to
probe the idprom. Be quiet in _save_symtab() when all is well.

No longer force boothowto=RB_SINGLE|RB_KDB
(Yes, it goes multi-user just fine! 8^)

s/sun3x_/_/ in sun3x_(round|trunc)_(page|seg) macros

Define "cold" over in autoconf.c

Force RB_SINGLE for now (in addition to RB_KDB).

Sync with sun3.

branches: 1.8.2;
Declare and set cputype and mmutype.

Kill sunmon.h; add sun "code names" (Hydra, Pegasus).

Use sunmon_abort() instead of mon_panic().

Move a bunch of stuff to sun3/sunmon.c where we can share it.

Do loadcrp(&mon_crp) only when returning permanently to the monitor.

Adapt to rename of pcb_mmuctx to pcb_mmucrp, and corrected
prototype of loadcrp(), which kills some bogus type casts.

Before dropping into the PROM monitor, restore its CPU Root Pointer (CRP),
and restore our own CRP if we resume. Make sure the string passed to
mon_reboot() is in our data segment where the PROM can see it.

branches: 1.1.1;
Initial revision