Misc cleanup to avoid future confusion.

- Remove more unnecessary debug sections
- Use DBG instead of COPTS to specify -Os as defined in bsd.prog.mk
- Use CFLAGS and CPPFLAGS correctly
- Explicitly set -ffreestanding

Consistently use ${RELEASEDIR}/${RELEASEMACHINE} instead of
${RELEASEDIR}/${MACHINE} (Paul Ripke)

branches: 1.10.10; 1.10.18; 1.10.22;
include bsd.init.mk to get Makefile.inc

branches: 1.9.2;
Avoid "unhandled relocation of type 3 for" error when load module.
"insmod zbsdmod.o" is successful now.

branches: 1.8.4;
Move flags for ARM's APCS ABI into a common variable. Add some forces to
deal with limitations in the Clang <-> LLVM backend interaction to pick
the correct ABI and target assembler.

branches: 1.7.4;
Force abi/float-abi/cpu
Only allow to build on little-endian.
Force MACHINE to be zaurus.

branches: 1.6.6;
- WARNS=4
- object size is more smaller.

branches: 1.5.12; 1.5.16;
Use <bsd.klinks.mk> to create ${MACHINE} and ${MACHINE_ARCH} symlinks.

branches: 1.4.20; 1.4.28; 1.4.34;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.3.2;
Use $INSTALL_FILE, not just $INSTALL so that unpriviliged builds work.

build and install zbsdmod.o.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.12; 1.1.20; 1.1.24; 1.1.26; 1.1.28;
Update from the latest Zaurus source from NONAKA Kimihiro.

- LCD screen and keyboard are working now.
- Add bootstrap loader.

Make sure to clear bss before jumping to a kernel copied from load buffer.

This will fix yet another boot failure issue
"screen white-out after loading a kernel"
https://mail-index.netbsd.org/port-zaurus/2019/10/26/msg000072.html

Should be pulled up to netbsd-8 and netbsd-9.

branches: 1.6.40; 1.6.48; 1.6.52;
- WARNS=4
- object size is more smaller.

branches: 1.5.8; 1.5.12;
Advertise printk() as a printf-like function. (from OpenBSD)

branches: 1.4.42;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.3.10;
Added RCS Id.

remove unused function.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.12; 1.1.14; 1.1.20;
Update from the latest Zaurus source from NONAKA Kimihiro.

- LCD screen and keyboard are working now.
- Add bootstrap loader.

Make zaurus kernels use symbol tables loaded by the bootloader.

Now COPY_SYMTAB is no longer necessary and it saves ~500kbytes of
GENERIC, so re-enable options DDB (i.e. revert GENERIC rev 1.85).

Also fix zbsdmod.o (a kernel loader for Zaurus Linux) to load symbols
at a proper address as the MI sys/lib/libsa/loadfile_elf32.c does.

No particular comment on port-zaurus@:
https://mail-index.netbsd.org/port-zaurus/2019/11/11/msg000086.html

Note zbsdmod.c (derived from OpenBSD/zaurus) assumed that the loaded
kernels had "esym" variable at the top of its data section and
implicitly overwrote it with the address of loaded symbol tables.
OpenBSD/zaurus kernels used the esym value written by the zbsdmod.o
to initialize ksyms(4) on startup, but we will avoid such implicit
MD interface between the bootloader and kernels (though we don't
bother to add a symbol address value into bootinfo but just assume
symbols are loaded at end[] of a loaded kernel, as per the MI
libsa loadfile() implementation).

Worth to pullup to both netbsd-8 and netbsd-9.

Make sure to clear bss before jumping to a kernel copied from load buffer.

This will fix yet another boot failure issue
"screen white-out after loading a kernel"
https://mail-index.netbsd.org/port-zaurus/2019/10/26/msg000072.html

Should be pulled up to netbsd-8 and netbsd-9.

Fix another boot failure issue of NetBSD/zaurus 8.x and later.

It looks some cacheline alignment restriction so that zbsdmod.o in
NetBSD/zaurus 8.x release cannot jump to a loaded kernel properly.
Adding an explicit alingment pseudo op to put all instructions
between I-cache flush and jumping to the loaded kernel into the
same cacheline solves the issue.

See my post in port-zaurus@ for details:
https://mail-index.netbsd.org/port-zaurus/2019/10/22/msg000069.html

Should be pulled up to netbsd-8 and netbsd-9.

branches: 1.9.22; 1.9.30; 1.9.34;
Don't use cpsr_all/spsr_all with mrs, it doesn't take a mask.

branches: 1.8.6; 1.8.10;
more clean D-cache.

- WARNS=4
- object size is more smaller.

branches: 1.6.4; 1.6.8;
Reduce kernel size.
Tested on SL-C1000.

Fix PR/44898.

branches: 1.5.2;
Add missing argument to printk(). (from OpenBSD)

branches: 1.4.4;
Added zboot from OpenBSD.

branches: 1.3.4;
Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

branches: 1.2.4; 1.2.10; 1.2.12;
increase bsdimage size.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.50;
Update from the latest Zaurus source from NONAKA Kimihiro.

- LCD screen and keyboard are working now.
- Add bootstrap loader.