Use OBJCOPY_STRIPFLAGS instead of STRIPFLAGS.

Produce elf32 images for mipsn64eb too

use ${MACHINE_MIPS64}

branches: 1.70.16;
ELF2ECOFF -> MIPS_ELF2ECOFF

- Determine KERN_AS automatically depending on whether OPT_MODULAR is
set or not, in the same way as libcompat.

- Specify OPT_MODULAR in the port Makefile instead of KERN_AS.

Now, KERN_AS=library is used for kernels without module(7) for all ports.

OK christos

branches: 1.68.2;
use the compiler way of passing arguments to the linker.

branches: 1.67.12;
leave the part for GCC >= 5.3 in.

Was a little over-eager and accidentally removed the else case.

GC workaround for GCC 4.8 fixed in GCC 5+

branches: 1.65.2; 1.65.4;
make sure we compile mips_fpu.c and fp.S with -mhard-float

Restrict float format hacks to gcc 4.8

gcc does not pass floating point options to the assembler
by default, because it is afraid that the stricter tests
will break userland code. The new binutils is pickier about
this. Gcc 5.x fixes the issue so for now, set explicitly
the assembler soft-float flags when we build the kernel.
see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64569

Define ${LINKSCRIPT} in one place.

branches: 1.61.2;
LINKSCRIPT is set only once, so use = not +=.

Use LINKSCRIPT.

Explicitly set KERN_AS (this could be done in /usr/src/sys/conf/Makefile.*)
so that modules work, on config files that did not set it explicitly. All
the files now use the standard logic, except the ones that set KERN_AS=obj
and Makefile.usermode which sets KERN_AS=library.

branches: 1.58.4; 1.58.14;
Major merge forward from matt-nb5-mips64.
New fixup code.
New common SPL code.
New common interrupt code.
Move related variables into structures.
Cleanup locore (move MD variable into it).
Kill StudlyCaps
Use PCU for FPU

Use elf32-ntrad{little,big}mips

Switch remaining platforms to modern CPP for assembler.

branches: 1.55.4; 1.55.6; 1.55.8;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Convert the recently introduced awk command to retrieve the value of the
option MODULAR to using %MODULAR%. While it is now possible to only
request the new version in the affected Makefiles, it is made mandatory for
everybody because I just fixed a bug in config(1) that would not make it
fail in the case of a syntax error in the Makefile template.

Now that "options MODULAR" is handled via defflag, the Makefile
generated by config(1) in the kernel compile directory no longer
contains IDENT=-DMODULAR. Instead, there's an opt_modular.h file that
might or might not contain "#define MODULAR 1".

Adapt to this by adding an OPT_MODULAR variable to relevant Makefiles,
set via an awk script that parses opt_modular.h.

branches: 1.52.2;
Clean-up makefile stub used to include in the build the binary HAL object

LKM -> MODULAR

branches: 1.50.6; 1.50.10; 1.50.16; 1.50.18; 1.50.20; 1.50.24;
Backout previous. vr_idle.S no longer depends on assym.h.

Another assym.h dependency for hpcmips

Missing assym.h dependency.

branches: 1.47.2; 1.47.8;
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: 1.46.10;
Preserve local symbols on linking a kernel so that
we can get more useful trace on ddb(4).

merge yamt-idlelwp branch. asked by core@. some ports still needs work.

from doc/BRANCHES:

idle lwp, and some changes depending on it.

1. separate context switching and thread scheduling.
(cf. gmcgarry_ctxsw)
2. implement idle lwp.
3. clean up related MD/MI interfaces.
4. make scheduler(s) modular.

branches: 1.44.6; 1.44.8; 1.44.12; 1.44.14; 1.44.20; 1.44.22;
Add -msym32 to CFLAGS when MACHINE_ARCH is mips64e[bl].

Since kernels are always run out of KSEG0 (0xffffffff.8xxxxxxx), we can
take advantage of that if we load a 32 bit address (0x8xxxxxxx) that it
will be sign-extended to 64 bits (0xffffffff.8xxxxxxx).

So instead of 6 instructions (2 lui, 2 daddiu, dsll32, daddu) to load an
address, the normal number of 2 instructions (lui, daddiu) will be used.

Thus telling gcc/gas that symbols will always be 32 bits significantly
shrinks (by 10%) and speeds up a MIPS64 kernel.

Sign extend DEFTEXTADDR on MIPS64.

Nuke unneeded LP64 conditional section

Add support for using the MIPS Atheros HAL.
Atheros WLAN added to default evbmips DBAU1500, DBAU1550, and MTX-1 configs.
Note that AR5312 config will require unique HAL that we don't have yet.

branches: 1.40.6; 1.40.8; 1.40.10; 1.40.12; 1.40.14;
Build libkern as a .o if LKMs are enabled so that all libkern functions
are available to LKMs, not just those needed by the kernel at link time.

From PR port-mips/31857 from Takehiko NOZAKI.

branches: 1.39.2;
s/GENASSYM/GENASSYM_CONF/ so we can use "GENASSYM" as the program name.

Set LP64 default to "no".

Rework previous slightly, so that ld is passed the right flags for 64-bit mode.

Allow arguments to as/ld to be specified in the kernel config file. Provide
a mechanism to override ranlib.

Add the %MAKEOPTIONSAPPEND token at the end of the file, after the
common Makefile.kern.inc has been included.

branches: 1.34.4;
Define ELF2ECOFF here for native build.

(BTW, objcopy with OMAGIC kernel won't work on old pmax and sgimips machines?)

Add some dependancies on assym.h; helps "make -j N" kernel builds.

branches: 1.32.6;
Remove the explicit `makeoptions MACHINE_ARCH="mipse{b,l}"' for kernel
builds and use the endianness of the toolchain being used to determine
the endianness of the kernel.

Build with kernel with -msoft-float.

* Add -mno-abicalls to AFLAGS.
* GCC 3.3's traditional preprocessor functions properly now, so we
no longer need to special-case it.

Nuke the CROSSDIR stuff.

No need to pass -mno-half-pic; NetBSD's compiler does not generate
half-pic references.

Don't use -traditional-cpp if HAVE_GCC3.

branches: 1.26.6; 1.26.8;
Don't explicitly depend locore_*.S and fp.S on assym.h - this is done
for all .S files in /sys/conf/Makefile.kern.inc.

Roll the rest of the ports over to the new MI kernel build machinery.
Any problems reported by testers have been fixed, and massive
cross-compiling of kernels has shown that any problems that remain
with actually building kernels are not related to this.

branches: 1.24.2;
remove " in assignment of ENDIAN.
fixes mipseb link breakage.

Change defaults for kernel compiles. Default all to USETOOLS?=no and have
the etc Makefile override that by putting USETOOLS into $.MAKEOVERRIDES
This way the default for kernel compiles is still to use the installed
toolchain instead of depending on $TOOLDIR. $TOOLDIR can be used by
simply adding USETOOLS=yes to the command line as usual.

Adjust each ports template to set the default no setting and also pull in
bsd.own.mk if they weren't already to ensure they'll build correctly
with the new toolchain setup.

branches: 1.22.2;
For MIPS kernel Makefiles, don't set ENDIAN in std.${MACHINE}. Instead,
explicitly set MACHINE_ARCH to the appropriate thing. Makefile.mips will
then set all of the internal variables it needs to accordingly.

Use MACHINE, not TARGET_MACHINE.

R5900 support.
COP0_SYNC
In R5900 mtc0, tlbr, tlbp, tlbwi, tlbwr must be followed by sync.p.
if defined MIPS3_5900, COP0_SYNC is defined as sync.p. else nothing.
IPL_ICU_MASK
mask interrupt directly ICU instead of SR.IM.
I've added this feature to support software interrupt for R5900.
and this option may be useful for platform which has cascaded ICU.

Use a separate variable (${KERNLDSCRIPT}) for the name of the kernel
ld script, so it can be used in other places.

Use ".-include" instead of the ".if exists(...) ..." dance.

Use a single ldscript instead of separate scripts for either endianness;
use command line parameters to ld(1) instead to set the endian format.
Clean up some endian decisions in mips/conf/Makefile.mips.
Wrap some long lines.

branches: 1.16.2;
By adding a well-placed space or two, 'make depend' no longer loses
due to a directory name like 'arc.current' messing up a sed substitution.

Suppress warning message:
warning: duplicate script for target "fp.o" ignored
And delete verbose ifs.

branches: 1.14.2;
define _KERNEL_OPT as well as _KERNEL. we will use this in the future to
get kernel "opt_foo.h" headers, rather than _KERNEL && !_LKM.

Allow overriding the 'install' target.

(I have a nice 'install' target for cobalts here, but that only works there.
I guess I'll put that into htdocs now that the cobalt port uses Makefile.mips)

Define ${OBJCOPY}.

XXX: Should we use ${CROSSDIR} here or not?

branches: 1.11.2;
- don't ignore DEFCOPTS (Makefile.mips).
- DEFCOPTS of hpcmips is "-Os -mmemcpy" (std.hpcmips).

delete obsolete comment

cpp/lorder/mkdep don't have cross specific versions.

branches: 1.8.2;
Add DEFGP/CROSSDIR for hpcmips.

Remove redundant depend of fp.S

Include FP support if NOFPU is *NOT* defined.

Revert back to a machinearch (really cputype) of mips. Put ENDIAN back.

Deal with lack of floating point on hpcmips, etc.

Change arch from mips to mipsel/mipseb as appropriate. Nuke the ENDIAN
makeoption. Key off MACHINE_ARCH for adding -EB/-EL to CFLAGS/AFLAGS/LD/
LINKFLAGS.

Add a POST_STRIP_SYSTEM_LD_FLAGS for mipsco and pmax.

Start using a Makefile.mips. Use a combination of makeoptions and
Makefile.sgimips.inc which has sgimips specific stuff.

Produce elf32 images for mipsn64eb too

use ${MACHINE_MIPS64}

ELF2ECOFF -> MIPS_ELF2ECOFF

- Determine KERN_AS automatically depending on whether OPT_MODULAR is
set or not, in the same way as libcompat.

- Specify OPT_MODULAR in the port Makefile instead of KERN_AS.

Now, KERN_AS=library is used for kernels without module(7) for all ports.

OK christos

branches: 1.68.2;
use the compiler way of passing arguments to the linker.

branches: 1.67.12;
leave the part for GCC >= 5.3 in.

Was a little over-eager and accidentally removed the else case.

GC workaround for GCC 4.8 fixed in GCC 5+

branches: 1.65.2; 1.65.4;
make sure we compile mips_fpu.c and fp.S with -mhard-float

Restrict float format hacks to gcc 4.8

gcc does not pass floating point options to the assembler
by default, because it is afraid that the stricter tests
will break userland code. The new binutils is pickier about
this. Gcc 5.x fixes the issue so for now, set explicitly
the assembler soft-float flags when we build the kernel.
see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64569

Define ${LINKSCRIPT} in one place.

branches: 1.61.2;
LINKSCRIPT is set only once, so use = not +=.

Use LINKSCRIPT.

Explicitly set KERN_AS (this could be done in /usr/src/sys/conf/Makefile.*)
so that modules work, on config files that did not set it explicitly. All
the files now use the standard logic, except the ones that set KERN_AS=obj
and Makefile.usermode which sets KERN_AS=library.

branches: 1.58.4; 1.58.14;
Major merge forward from matt-nb5-mips64.
New fixup code.
New common SPL code.
New common interrupt code.
Move related variables into structures.
Cleanup locore (move MD variable into it).
Kill StudlyCaps
Use PCU for FPU

Use elf32-ntrad{little,big}mips

Switch remaining platforms to modern CPP for assembler.

branches: 1.55.4; 1.55.6; 1.55.8;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Convert the recently introduced awk command to retrieve the value of the
option MODULAR to using %MODULAR%. While it is now possible to only
request the new version in the affected Makefiles, it is made mandatory for
everybody because I just fixed a bug in config(1) that would not make it
fail in the case of a syntax error in the Makefile template.

Now that "options MODULAR" is handled via defflag, the Makefile
generated by config(1) in the kernel compile directory no longer
contains IDENT=-DMODULAR. Instead, there's an opt_modular.h file that
might or might not contain "#define MODULAR 1".

Adapt to this by adding an OPT_MODULAR variable to relevant Makefiles,
set via an awk script that parses opt_modular.h.

branches: 1.52.2;
Clean-up makefile stub used to include in the build the binary HAL object

LKM -> MODULAR

branches: 1.50.6; 1.50.10; 1.50.16; 1.50.18; 1.50.20; 1.50.24;
Backout previous. vr_idle.S no longer depends on assym.h.

Another assym.h dependency for hpcmips

Missing assym.h dependency.

branches: 1.47.2; 1.47.8;
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: 1.46.10;
Preserve local symbols on linking a kernel so that
we can get more useful trace on ddb(4).

merge yamt-idlelwp branch. asked by core@. some ports still needs work.

from doc/BRANCHES:

idle lwp, and some changes depending on it.

1. separate context switching and thread scheduling.
(cf. gmcgarry_ctxsw)
2. implement idle lwp.
3. clean up related MD/MI interfaces.
4. make scheduler(s) modular.

branches: 1.44.6; 1.44.8; 1.44.12; 1.44.14; 1.44.20; 1.44.22;
Add -msym32 to CFLAGS when MACHINE_ARCH is mips64e[bl].

Since kernels are always run out of KSEG0 (0xffffffff.8xxxxxxx), we can
take advantage of that if we load a 32 bit address (0x8xxxxxxx) that it
will be sign-extended to 64 bits (0xffffffff.8xxxxxxx).

So instead of 6 instructions (2 lui, 2 daddiu, dsll32, daddu) to load an
address, the normal number of 2 instructions (lui, daddiu) will be used.

Thus telling gcc/gas that symbols will always be 32 bits significantly
shrinks (by 10%) and speeds up a MIPS64 kernel.

Sign extend DEFTEXTADDR on MIPS64.

Nuke unneeded LP64 conditional section

Add support for using the MIPS Atheros HAL.
Atheros WLAN added to default evbmips DBAU1500, DBAU1550, and MTX-1 configs.
Note that AR5312 config will require unique HAL that we don't have yet.

branches: 1.40.6; 1.40.8; 1.40.10; 1.40.12; 1.40.14;
Build libkern as a .o if LKMs are enabled so that all libkern functions
are available to LKMs, not just those needed by the kernel at link time.

From PR port-mips/31857 from Takehiko NOZAKI.

branches: 1.39.2;
s/GENASSYM/GENASSYM_CONF/ so we can use "GENASSYM" as the program name.

Set LP64 default to "no".

Rework previous slightly, so that ld is passed the right flags for 64-bit mode.

Allow arguments to as/ld to be specified in the kernel config file. Provide
a mechanism to override ranlib.

Add the %MAKEOPTIONSAPPEND token at the end of the file, after the
common Makefile.kern.inc has been included.

branches: 1.34.4;
Define ELF2ECOFF here for native build.

(BTW, objcopy with OMAGIC kernel won't work on old pmax and sgimips machines?)

Add some dependancies on assym.h; helps "make -j N" kernel builds.

branches: 1.32.6;
Remove the explicit `makeoptions MACHINE_ARCH="mipse{b,l}"' for kernel
builds and use the endianness of the toolchain being used to determine
the endianness of the kernel.

Build with kernel with -msoft-float.

* Add -mno-abicalls to AFLAGS.
* GCC 3.3's traditional preprocessor functions properly now, so we
no longer need to special-case it.

Nuke the CROSSDIR stuff.

No need to pass -mno-half-pic; NetBSD's compiler does not generate
half-pic references.

Don't use -traditional-cpp if HAVE_GCC3.

branches: 1.26.6; 1.26.8;
Don't explicitly depend locore_*.S and fp.S on assym.h - this is done
for all .S files in /sys/conf/Makefile.kern.inc.

Roll the rest of the ports over to the new MI kernel build machinery.
Any problems reported by testers have been fixed, and massive
cross-compiling of kernels has shown that any problems that remain
with actually building kernels are not related to this.

branches: 1.24.2;
remove " in assignment of ENDIAN.
fixes mipseb link breakage.

Change defaults for kernel compiles. Default all to USETOOLS?=no and have
the etc Makefile override that by putting USETOOLS into $.MAKEOVERRIDES
This way the default for kernel compiles is still to use the installed
toolchain instead of depending on $TOOLDIR. $TOOLDIR can be used by
simply adding USETOOLS=yes to the command line as usual.

Adjust each ports template to set the default no setting and also pull in
bsd.own.mk if they weren't already to ensure they'll build correctly
with the new toolchain setup.

branches: 1.22.2;
For MIPS kernel Makefiles, don't set ENDIAN in std.${MACHINE}. Instead,
explicitly set MACHINE_ARCH to the appropriate thing. Makefile.mips will
then set all of the internal variables it needs to accordingly.

Use MACHINE, not TARGET_MACHINE.

R5900 support.
COP0_SYNC
In R5900 mtc0, tlbr, tlbp, tlbwi, tlbwr must be followed by sync.p.
if defined MIPS3_5900, COP0_SYNC is defined as sync.p. else nothing.
IPL_ICU_MASK
mask interrupt directly ICU instead of SR.IM.
I've added this feature to support software interrupt for R5900.
and this option may be useful for platform which has cascaded ICU.

Use a separate variable (${KERNLDSCRIPT}) for the name of the kernel
ld script, so it can be used in other places.

Use ".-include" instead of the ".if exists(...) ..." dance.

Use a single ldscript instead of separate scripts for either endianness;
use command line parameters to ld(1) instead to set the endian format.
Clean up some endian decisions in mips/conf/Makefile.mips.
Wrap some long lines.

branches: 1.16.2;
By adding a well-placed space or two, 'make depend' no longer loses
due to a directory name like 'arc.current' messing up a sed substitution.

Suppress warning message:
warning: duplicate script for target "fp.o" ignored
And delete verbose ifs.

branches: 1.14.2;
define _KERNEL_OPT as well as _KERNEL. we will use this in the future to
get kernel "opt_foo.h" headers, rather than _KERNEL && !_LKM.

Allow overriding the 'install' target.

(I have a nice 'install' target for cobalts here, but that only works there.
I guess I'll put that into htdocs now that the cobalt port uses Makefile.mips)

Define ${OBJCOPY}.

XXX: Should we use ${CROSSDIR} here or not?

branches: 1.11.2;
- don't ignore DEFCOPTS (Makefile.mips).
- DEFCOPTS of hpcmips is "-Os -mmemcpy" (std.hpcmips).

delete obsolete comment

cpp/lorder/mkdep don't have cross specific versions.

branches: 1.8.2;
Add DEFGP/CROSSDIR for hpcmips.

Remove redundant depend of fp.S

Include FP support if NOFPU is *NOT* defined.

Revert back to a machinearch (really cputype) of mips. Put ENDIAN back.

Deal with lack of floating point on hpcmips, etc.

Change arch from mips to mipsel/mipseb as appropriate. Nuke the ENDIAN
makeoption. Key off MACHINE_ARCH for adding -EB/-EL to CFLAGS/AFLAGS/LD/
LINKFLAGS.

Add a POST_STRIP_SYSTEM_LD_FLAGS for mipsco and pmax.

Start using a Makefile.mips. Use a combination of makeoptions and
Makefile.sgimips.inc which has sgimips specific stuff.

ELF2ECOFF -> MIPS_ELF2ECOFF

- Determine KERN_AS automatically depending on whether OPT_MODULAR is
set or not, in the same way as libcompat.

- Specify OPT_MODULAR in the port Makefile instead of KERN_AS.

Now, KERN_AS=library is used for kernels without module(7) for all ports.

OK christos

use the compiler way of passing arguments to the linker.

branches: 1.67.12;
leave the part for GCC >= 5.3 in.

Was a little over-eager and accidentally removed the else case.

GC workaround for GCC 4.8 fixed in GCC 5+

branches: 1.65.2; 1.65.4;
make sure we compile mips_fpu.c and fp.S with -mhard-float

Restrict float format hacks to gcc 4.8

gcc does not pass floating point options to the assembler
by default, because it is afraid that the stricter tests
will break userland code. The new binutils is pickier about
this. Gcc 5.x fixes the issue so for now, set explicitly
the assembler soft-float flags when we build the kernel.
see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64569

Define ${LINKSCRIPT} in one place.

branches: 1.61.2;
LINKSCRIPT is set only once, so use = not +=.

Use LINKSCRIPT.

Explicitly set KERN_AS (this could be done in /usr/src/sys/conf/Makefile.*)
so that modules work, on config files that did not set it explicitly. All
the files now use the standard logic, except the ones that set KERN_AS=obj
and Makefile.usermode which sets KERN_AS=library.

branches: 1.58.4; 1.58.14;
Major merge forward from matt-nb5-mips64.
New fixup code.
New common SPL code.
New common interrupt code.
Move related variables into structures.
Cleanup locore (move MD variable into it).
Kill StudlyCaps
Use PCU for FPU

Use elf32-ntrad{little,big}mips

Switch remaining platforms to modern CPP for assembler.

branches: 1.55.4; 1.55.6; 1.55.8;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Convert the recently introduced awk command to retrieve the value of the
option MODULAR to using %MODULAR%. While it is now possible to only
request the new version in the affected Makefiles, it is made mandatory for
everybody because I just fixed a bug in config(1) that would not make it
fail in the case of a syntax error in the Makefile template.

Now that "options MODULAR" is handled via defflag, the Makefile
generated by config(1) in the kernel compile directory no longer
contains IDENT=-DMODULAR. Instead, there's an opt_modular.h file that
might or might not contain "#define MODULAR 1".

Adapt to this by adding an OPT_MODULAR variable to relevant Makefiles,
set via an awk script that parses opt_modular.h.

branches: 1.52.2;
Clean-up makefile stub used to include in the build the binary HAL object

LKM -> MODULAR

branches: 1.50.6; 1.50.10; 1.50.16; 1.50.18; 1.50.20; 1.50.24;
Backout previous. vr_idle.S no longer depends on assym.h.

Another assym.h dependency for hpcmips

Missing assym.h dependency.

branches: 1.47.2; 1.47.8;
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: 1.46.10;
Preserve local symbols on linking a kernel so that
we can get more useful trace on ddb(4).

merge yamt-idlelwp branch. asked by core@. some ports still needs work.

from doc/BRANCHES:

idle lwp, and some changes depending on it.

1. separate context switching and thread scheduling.
(cf. gmcgarry_ctxsw)
2. implement idle lwp.
3. clean up related MD/MI interfaces.
4. make scheduler(s) modular.

branches: 1.44.6; 1.44.8; 1.44.12; 1.44.14; 1.44.20; 1.44.22;
Add -msym32 to CFLAGS when MACHINE_ARCH is mips64e[bl].

Since kernels are always run out of KSEG0 (0xffffffff.8xxxxxxx), we can
take advantage of that if we load a 32 bit address (0x8xxxxxxx) that it
will be sign-extended to 64 bits (0xffffffff.8xxxxxxx).

So instead of 6 instructions (2 lui, 2 daddiu, dsll32, daddu) to load an
address, the normal number of 2 instructions (lui, daddiu) will be used.

Thus telling gcc/gas that symbols will always be 32 bits significantly
shrinks (by 10%) and speeds up a MIPS64 kernel.

Sign extend DEFTEXTADDR on MIPS64.

Nuke unneeded LP64 conditional section

Add support for using the MIPS Atheros HAL.
Atheros WLAN added to default evbmips DBAU1500, DBAU1550, and MTX-1 configs.
Note that AR5312 config will require unique HAL that we don't have yet.

branches: 1.40.6; 1.40.8; 1.40.10; 1.40.12; 1.40.14;
Build libkern as a .o if LKMs are enabled so that all libkern functions
are available to LKMs, not just those needed by the kernel at link time.

From PR port-mips/31857 from Takehiko NOZAKI.

branches: 1.39.2;
s/GENASSYM/GENASSYM_CONF/ so we can use "GENASSYM" as the program name.

Set LP64 default to "no".

Rework previous slightly, so that ld is passed the right flags for 64-bit mode.

Allow arguments to as/ld to be specified in the kernel config file. Provide
a mechanism to override ranlib.

Add the %MAKEOPTIONSAPPEND token at the end of the file, after the
common Makefile.kern.inc has been included.

branches: 1.34.4;
Define ELF2ECOFF here for native build.

(BTW, objcopy with OMAGIC kernel won't work on old pmax and sgimips machines?)

Add some dependancies on assym.h; helps "make -j N" kernel builds.

branches: 1.32.6;
Remove the explicit `makeoptions MACHINE_ARCH="mipse{b,l}"' for kernel
builds and use the endianness of the toolchain being used to determine
the endianness of the kernel.

Build with kernel with -msoft-float.

* Add -mno-abicalls to AFLAGS.
* GCC 3.3's traditional preprocessor functions properly now, so we
no longer need to special-case it.

Nuke the CROSSDIR stuff.

No need to pass -mno-half-pic; NetBSD's compiler does not generate
half-pic references.

Don't use -traditional-cpp if HAVE_GCC3.

branches: 1.26.6; 1.26.8;
Don't explicitly depend locore_*.S and fp.S on assym.h - this is done
for all .S files in /sys/conf/Makefile.kern.inc.

Roll the rest of the ports over to the new MI kernel build machinery.
Any problems reported by testers have been fixed, and massive
cross-compiling of kernels has shown that any problems that remain
with actually building kernels are not related to this.

branches: 1.24.2;
remove " in assignment of ENDIAN.
fixes mipseb link breakage.

Change defaults for kernel compiles. Default all to USETOOLS?=no and have
the etc Makefile override that by putting USETOOLS into $.MAKEOVERRIDES
This way the default for kernel compiles is still to use the installed
toolchain instead of depending on $TOOLDIR. $TOOLDIR can be used by
simply adding USETOOLS=yes to the command line as usual.

Adjust each ports template to set the default no setting and also pull in
bsd.own.mk if they weren't already to ensure they'll build correctly
with the new toolchain setup.

branches: 1.22.2;
For MIPS kernel Makefiles, don't set ENDIAN in std.${MACHINE}. Instead,
explicitly set MACHINE_ARCH to the appropriate thing. Makefile.mips will
then set all of the internal variables it needs to accordingly.

Use MACHINE, not TARGET_MACHINE.

R5900 support.
COP0_SYNC
In R5900 mtc0, tlbr, tlbp, tlbwi, tlbwr must be followed by sync.p.
if defined MIPS3_5900, COP0_SYNC is defined as sync.p. else nothing.
IPL_ICU_MASK
mask interrupt directly ICU instead of SR.IM.
I've added this feature to support software interrupt for R5900.
and this option may be useful for platform which has cascaded ICU.

Use a separate variable (${KERNLDSCRIPT}) for the name of the kernel
ld script, so it can be used in other places.

Use ".-include" instead of the ".if exists(...) ..." dance.

Use a single ldscript instead of separate scripts for either endianness;
use command line parameters to ld(1) instead to set the endian format.
Clean up some endian decisions in mips/conf/Makefile.mips.
Wrap some long lines.

branches: 1.16.2;
By adding a well-placed space or two, 'make depend' no longer loses
due to a directory name like 'arc.current' messing up a sed substitution.

Suppress warning message:
warning: duplicate script for target "fp.o" ignored
And delete verbose ifs.

branches: 1.14.2;
define _KERNEL_OPT as well as _KERNEL. we will use this in the future to
get kernel "opt_foo.h" headers, rather than _KERNEL && !_LKM.

Allow overriding the 'install' target.

(I have a nice 'install' target for cobalts here, but that only works there.
I guess I'll put that into htdocs now that the cobalt port uses Makefile.mips)

Define ${OBJCOPY}.

XXX: Should we use ${CROSSDIR} here or not?

branches: 1.11.2;
- don't ignore DEFCOPTS (Makefile.mips).
- DEFCOPTS of hpcmips is "-Os -mmemcpy" (std.hpcmips).

delete obsolete comment

cpp/lorder/mkdep don't have cross specific versions.

branches: 1.8.2;
Add DEFGP/CROSSDIR for hpcmips.

Remove redundant depend of fp.S

Include FP support if NOFPU is *NOT* defined.

Revert back to a machinearch (really cputype) of mips. Put ENDIAN back.

Deal with lack of floating point on hpcmips, etc.

Change arch from mips to mipsel/mipseb as appropriate. Nuke the ENDIAN
makeoption. Key off MACHINE_ARCH for adding -EB/-EL to CFLAGS/AFLAGS/LD/
LINKFLAGS.

Add a POST_STRIP_SYSTEM_LD_FLAGS for mipsco and pmax.

Start using a Makefile.mips. Use a combination of makeoptions and
Makefile.sgimips.inc which has sgimips specific stuff.

leave the part for GCC >= 5.3 in.

Was a little over-eager and accidentally removed the else case.

GC workaround for GCC 4.8 fixed in GCC 5+

make sure we compile mips_fpu.c and fp.S with -mhard-float

Restrict float format hacks to gcc 4.8

gcc does not pass floating point options to the assembler
by default, because it is afraid that the stricter tests
will break userland code. The new binutils is pickier about
this. Gcc 5.x fixes the issue so for now, set explicitly
the assembler soft-float flags when we build the kernel.
see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64569

Define ${LINKSCRIPT} in one place.

branches: 1.61.2;
LINKSCRIPT is set only once, so use = not +=.

Use LINKSCRIPT.

Explicitly set KERN_AS (this could be done in /usr/src/sys/conf/Makefile.*)
so that modules work, on config files that did not set it explicitly. All
the files now use the standard logic, except the ones that set KERN_AS=obj
and Makefile.usermode which sets KERN_AS=library.

branches: 1.58.4; 1.58.14;
Major merge forward from matt-nb5-mips64.
New fixup code.
New common SPL code.
New common interrupt code.
Move related variables into structures.
Cleanup locore (move MD variable into it).
Kill StudlyCaps
Use PCU for FPU

Use elf32-ntrad{little,big}mips

Switch remaining platforms to modern CPP for assembler.

branches: 1.55.4; 1.55.6; 1.55.8;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Convert the recently introduced awk command to retrieve the value of the
option MODULAR to using %MODULAR%. While it is now possible to only
request the new version in the affected Makefiles, it is made mandatory for
everybody because I just fixed a bug in config(1) that would not make it
fail in the case of a syntax error in the Makefile template.

Now that "options MODULAR" is handled via defflag, the Makefile
generated by config(1) in the kernel compile directory no longer
contains IDENT=-DMODULAR. Instead, there's an opt_modular.h file that
might or might not contain "#define MODULAR 1".

Adapt to this by adding an OPT_MODULAR variable to relevant Makefiles,
set via an awk script that parses opt_modular.h.

branches: 1.52.2;
Clean-up makefile stub used to include in the build the binary HAL object

LKM -> MODULAR

branches: 1.50.6; 1.50.10; 1.50.16; 1.50.18; 1.50.20; 1.50.24;
Backout previous. vr_idle.S no longer depends on assym.h.

Another assym.h dependency for hpcmips

Missing assym.h dependency.

branches: 1.47.2; 1.47.8;
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: 1.46.10;
Preserve local symbols on linking a kernel so that
we can get more useful trace on ddb(4).

merge yamt-idlelwp branch. asked by core@. some ports still needs work.

from doc/BRANCHES:

idle lwp, and some changes depending on it.

1. separate context switching and thread scheduling.
(cf. gmcgarry_ctxsw)
2. implement idle lwp.
3. clean up related MD/MI interfaces.
4. make scheduler(s) modular.

branches: 1.44.6; 1.44.8; 1.44.12; 1.44.14; 1.44.20; 1.44.22;
Add -msym32 to CFLAGS when MACHINE_ARCH is mips64e[bl].

Since kernels are always run out of KSEG0 (0xffffffff.8xxxxxxx), we can
take advantage of that if we load a 32 bit address (0x8xxxxxxx) that it
will be sign-extended to 64 bits (0xffffffff.8xxxxxxx).

So instead of 6 instructions (2 lui, 2 daddiu, dsll32, daddu) to load an
address, the normal number of 2 instructions (lui, daddiu) will be used.

Thus telling gcc/gas that symbols will always be 32 bits significantly
shrinks (by 10%) and speeds up a MIPS64 kernel.

Sign extend DEFTEXTADDR on MIPS64.

Nuke unneeded LP64 conditional section

Add support for using the MIPS Atheros HAL.
Atheros WLAN added to default evbmips DBAU1500, DBAU1550, and MTX-1 configs.
Note that AR5312 config will require unique HAL that we don't have yet.

branches: 1.40.6; 1.40.8; 1.40.10; 1.40.12; 1.40.14;
Build libkern as a .o if LKMs are enabled so that all libkern functions
are available to LKMs, not just those needed by the kernel at link time.

From PR port-mips/31857 from Takehiko NOZAKI.

branches: 1.39.2;
s/GENASSYM/GENASSYM_CONF/ so we can use "GENASSYM" as the program name.

Set LP64 default to "no".

Rework previous slightly, so that ld is passed the right flags for 64-bit mode.

Allow arguments to as/ld to be specified in the kernel config file. Provide
a mechanism to override ranlib.

Add the %MAKEOPTIONSAPPEND token at the end of the file, after the
common Makefile.kern.inc has been included.

branches: 1.34.4;
Define ELF2ECOFF here for native build.

(BTW, objcopy with OMAGIC kernel won't work on old pmax and sgimips machines?)

Add some dependancies on assym.h; helps "make -j N" kernel builds.

branches: 1.32.6;
Remove the explicit `makeoptions MACHINE_ARCH="mipse{b,l}"' for kernel
builds and use the endianness of the toolchain being used to determine
the endianness of the kernel.

Build with kernel with -msoft-float.

* Add -mno-abicalls to AFLAGS.
* GCC 3.3's traditional preprocessor functions properly now, so we
no longer need to special-case it.

Nuke the CROSSDIR stuff.

No need to pass -mno-half-pic; NetBSD's compiler does not generate
half-pic references.

Don't use -traditional-cpp if HAVE_GCC3.

branches: 1.26.6; 1.26.8;
Don't explicitly depend locore_*.S and fp.S on assym.h - this is done
for all .S files in /sys/conf/Makefile.kern.inc.

Roll the rest of the ports over to the new MI kernel build machinery.
Any problems reported by testers have been fixed, and massive
cross-compiling of kernels has shown that any problems that remain
with actually building kernels are not related to this.

branches: 1.24.2;
remove " in assignment of ENDIAN.
fixes mipseb link breakage.

Change defaults for kernel compiles. Default all to USETOOLS?=no and have
the etc Makefile override that by putting USETOOLS into $.MAKEOVERRIDES
This way the default for kernel compiles is still to use the installed
toolchain instead of depending on $TOOLDIR. $TOOLDIR can be used by
simply adding USETOOLS=yes to the command line as usual.

Adjust each ports template to set the default no setting and also pull in
bsd.own.mk if they weren't already to ensure they'll build correctly
with the new toolchain setup.

branches: 1.22.2;
For MIPS kernel Makefiles, don't set ENDIAN in std.${MACHINE}. Instead,
explicitly set MACHINE_ARCH to the appropriate thing. Makefile.mips will
then set all of the internal variables it needs to accordingly.

Use MACHINE, not TARGET_MACHINE.

R5900 support.
COP0_SYNC
In R5900 mtc0, tlbr, tlbp, tlbwi, tlbwr must be followed by sync.p.
if defined MIPS3_5900, COP0_SYNC is defined as sync.p. else nothing.
IPL_ICU_MASK
mask interrupt directly ICU instead of SR.IM.
I've added this feature to support software interrupt for R5900.
and this option may be useful for platform which has cascaded ICU.

Use a separate variable (${KERNLDSCRIPT}) for the name of the kernel
ld script, so it can be used in other places.

Use ".-include" instead of the ".if exists(...) ..." dance.

Use a single ldscript instead of separate scripts for either endianness;
use command line parameters to ld(1) instead to set the endian format.
Clean up some endian decisions in mips/conf/Makefile.mips.
Wrap some long lines.

branches: 1.16.2;
By adding a well-placed space or two, 'make depend' no longer loses
due to a directory name like 'arc.current' messing up a sed substitution.

Suppress warning message:
warning: duplicate script for target "fp.o" ignored
And delete verbose ifs.

branches: 1.14.2;
define _KERNEL_OPT as well as _KERNEL. we will use this in the future to
get kernel "opt_foo.h" headers, rather than _KERNEL && !_LKM.

Allow overriding the 'install' target.

(I have a nice 'install' target for cobalts here, but that only works there.
I guess I'll put that into htdocs now that the cobalt port uses Makefile.mips)

Define ${OBJCOPY}.

XXX: Should we use ${CROSSDIR} here or not?

branches: 1.11.2;
- don't ignore DEFCOPTS (Makefile.mips).
- DEFCOPTS of hpcmips is "-Os -mmemcpy" (std.hpcmips).

delete obsolete comment

cpp/lorder/mkdep don't have cross specific versions.

branches: 1.8.2;
Add DEFGP/CROSSDIR for hpcmips.

Remove redundant depend of fp.S

Include FP support if NOFPU is *NOT* defined.

Revert back to a machinearch (really cputype) of mips. Put ENDIAN back.

Deal with lack of floating point on hpcmips, etc.

Change arch from mips to mipsel/mipseb as appropriate. Nuke the ENDIAN
makeoption. Key off MACHINE_ARCH for adding -EB/-EL to CFLAGS/AFLAGS/LD/
LINKFLAGS.

Add a POST_STRIP_SYSTEM_LD_FLAGS for mipsco and pmax.

Start using a Makefile.mips. Use a combination of makeoptions and
Makefile.sgimips.inc which has sgimips specific stuff.

make sure we compile mips_fpu.c and fp.S with -mhard-float

Restrict float format hacks to gcc 4.8

gcc does not pass floating point options to the assembler
by default, because it is afraid that the stricter tests
will break userland code. The new binutils is pickier about
this. Gcc 5.x fixes the issue so for now, set explicitly
the assembler soft-float flags when we build the kernel.
see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64569

Define ${LINKSCRIPT} in one place.

branches: 1.61.2;
LINKSCRIPT is set only once, so use = not +=.

Use LINKSCRIPT.

Explicitly set KERN_AS (this could be done in /usr/src/sys/conf/Makefile.*)
so that modules work, on config files that did not set it explicitly. All
the files now use the standard logic, except the ones that set KERN_AS=obj
and Makefile.usermode which sets KERN_AS=library.

branches: 1.58.4; 1.58.14;
Major merge forward from matt-nb5-mips64.
New fixup code.
New common SPL code.
New common interrupt code.
Move related variables into structures.
Cleanup locore (move MD variable into it).
Kill StudlyCaps
Use PCU for FPU

Use elf32-ntrad{little,big}mips

Switch remaining platforms to modern CPP for assembler.

branches: 1.55.4; 1.55.6; 1.55.8;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

Convert the recently introduced awk command to retrieve the value of the
option MODULAR to using %MODULAR%. While it is now possible to only
request the new version in the affected Makefiles, it is made mandatory for
everybody because I just fixed a bug in config(1) that would not make it
fail in the case of a syntax error in the Makefile template.

Now that "options MODULAR" is handled via defflag, the Makefile
generated by config(1) in the kernel compile directory no longer
contains IDENT=-DMODULAR. Instead, there's an opt_modular.h file that
might or might not contain "#define MODULAR 1".

Adapt to this by adding an OPT_MODULAR variable to relevant Makefiles,
set via an awk script that parses opt_modular.h.

branches: 1.52.2;
Clean-up makefile stub used to include in the build the binary HAL object

LKM -> MODULAR

branches: 1.50.6; 1.50.10; 1.50.16; 1.50.18; 1.50.20; 1.50.24;
Backout previous. vr_idle.S no longer depends on assym.h.

Another assym.h dependency for hpcmips

Missing assym.h dependency.

branches: 1.47.2; 1.47.8;
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: 1.46.10;
Preserve local symbols on linking a kernel so that
we can get more useful trace on ddb(4).

merge yamt-idlelwp branch. asked by core@. some ports still needs work.

from doc/BRANCHES:

idle lwp, and some changes depending on it.

1. separate context switching and thread scheduling.
(cf. gmcgarry_ctxsw)
2. implement idle lwp.
3. clean up related MD/MI interfaces.
4. make scheduler(s) modular.

branches: 1.44.6; 1.44.8; 1.44.12; 1.44.14; 1.44.20; 1.44.22;
Add -msym32 to CFLAGS when MACHINE_ARCH is mips64e[bl].

Since kernels are always run out of KSEG0 (0xffffffff.8xxxxxxx), we can
take advantage of that if we load a 32 bit address (0x8xxxxxxx) that it
will be sign-extended to 64 bits (0xffffffff.8xxxxxxx).

So instead of 6 instructions (2 lui, 2 daddiu, dsll32, daddu) to load an
address, the normal number of 2 instructions (lui, daddiu) will be used.

Thus telling gcc/gas that symbols will always be 32 bits significantly
shrinks (by 10%) and speeds up a MIPS64 kernel.

Sign extend DEFTEXTADDR on MIPS64.

Nuke unneeded LP64 conditional section

Add support for using the MIPS Atheros HAL.
Atheros WLAN added to default evbmips DBAU1500, DBAU1550, and MTX-1 configs.
Note that AR5312 config will require unique HAL that we don't have yet.

branches: 1.40.6; 1.40.8; 1.40.10; 1.40.12; 1.40.14;
Build libkern as a .o if LKMs are enabled so that all libkern functions
are available to LKMs, not just those needed by the kernel at link time.

From PR port-mips/31857 from Takehiko NOZAKI.

branches: 1.39.2;
s/GENASSYM/GENASSYM_CONF/ so we can use "GENASSYM" as the program name.

Set LP64 default to "no".

Rework previous slightly, so that ld is passed the right flags for 64-bit mode.

Allow arguments to as/ld to be specified in the kernel config file. Provide
a mechanism to override ranlib.

Add the %MAKEOPTIONSAPPEND token at the end of the file, after the
common Makefile.kern.inc has been included.

branches: 1.34.4;
Define ELF2ECOFF here for native build.

(BTW, objcopy with OMAGIC kernel won't work on old pmax and sgimips machines?)

Add some dependancies on assym.h; helps "make -j N" kernel builds.

branches: 1.32.6;
Remove the explicit `makeoptions MACHINE_ARCH="mipse{b,l}"' for kernel
builds and use the endianness of the toolchain being used to determine
the endianness of the kernel.

Build with kernel with -msoft-float.

* Add -mno-abicalls to AFLAGS.
* GCC 3.3's traditional preprocessor functions properly now, so we
no longer need to special-case it.

Nuke the CROSSDIR stuff.

No need to pass -mno-half-pic; NetBSD's compiler does not generate
half-pic references.

Don't use -traditional-cpp if HAVE_GCC3.

branches: 1.26.6; 1.26.8;
Don't explicitly depend locore_*.S and fp.S on assym.h - this is done
for all .S files in /sys/conf/Makefile.kern.inc.

Roll the rest of the ports over to the new MI kernel build machinery.
Any problems reported by testers have been fixed, and massive
cross-compiling of kernels has shown that any problems that remain
with actually building kernels are not related to this.

branches: 1.24.2;
remove " in assignment of ENDIAN.
fixes mipseb link breakage.

Change defaults for kernel compiles. Default all to USETOOLS?=no and have
the etc Makefile override that by putting USETOOLS into $.MAKEOVERRIDES
This way the default for kernel compiles is still to use the installed
toolchain instead of depending on $TOOLDIR. $TOOLDIR can be used by
simply adding USETOOLS=yes to the command line as usual.

Adjust each ports template to set the default no setting and also pull in
bsd.own.mk if they weren't already to ensure they'll build correctly
with the new toolchain setup.

branches: 1.22.2;
For MIPS kernel Makefiles, don't set ENDIAN in std.${MACHINE}. Instead,
explicitly set MACHINE_ARCH to the appropriate thing. Makefile.mips will
then set all of the internal variables it needs to accordingly.

Use MACHINE, not TARGET_MACHINE.

R5900 support.
COP0_SYNC
In R5900 mtc0, tlbr, tlbp, tlbwi, tlbwr must be followed by sync.p.
if defined MIPS3_5900, COP0_SYNC is defined as sync.p. else nothing.
IPL_ICU_MASK
mask interrupt directly ICU instead of SR.IM.
I've added this feature to support software interrupt for R5900.
and this option may be useful for platform which has cascaded ICU.

Use a separate variable (${KERNLDSCRIPT}) for the name of the kernel
ld script, so it can be used in other places.

Use ".-include" instead of the ".if exists(...) ..." dance.

Use a single ldscript instead of separate scripts for either endianness;
use command line parameters to ld(1) instead to set the endian format.
Clean up some endian decisions in mips/conf/Makefile.mips.
Wrap some long lines.

branches: 1.16.2;
By adding a well-placed space or two, 'make depend' no longer loses
due to a directory name like 'arc.current' messing up a sed substitution.

Suppress warning message:
warning: duplicate script for target "fp.o" ignored
And delete verbose ifs.

branches: 1.14.2;
define _KERNEL_OPT as well as _KERNEL. we will use this in the future to
get kernel "opt_foo.h" headers, rather than _KERNEL && !_LKM.

Allow overriding the 'install' target.

(I have a nice 'install' target for cobalts here, but that only works there.
I guess I'll put that into htdocs now that the cobalt port uses Makefile.mips)

Define ${OBJCOPY}.

XXX: Should we use ${CROSSDIR} here or not?

branches: 1.11.2;
- don't ignore DEFCOPTS (Makefile.mips).
- DEFCOPTS of hpcmips is "-Os -mmemcpy" (std.hpcmips).

delete obsolete comment

cpp/lorder/mkdep don't have cross specific versions.

branches: 1.8.2;
Add DEFGP/CROSSDIR for hpcmips.

Remove redundant depend of fp.S

Include FP support if NOFPU is *NOT* defined.

Revert back to a machinearch (really cputype) of mips. Put ENDIAN back.

Deal with lack of floating point on hpcmips, etc.

Change arch from mips to mipsel/mipseb as appropriate. Nuke the ENDIAN
makeoption. Key off MACHINE_ARCH for adding -EB/-EL to CFLAGS/AFLAGS/LD/
LINKFLAGS.

Add a POST_STRIP_SYSTEM_LD_FLAGS for mipsco and pmax.

Start using a Makefile.mips. Use a combination of makeoptions and
Makefile.sgimips.inc which has sgimips specific stuff.