Revert this commit:

http://www.nerv.org/netbsd/?q=id:20210305T064016Z.410b0e33273c3a62110d09e8bb27939f6a8bab38

> Map framebuffer to virtual space when fb(4) is present,
> even if it is not console.

Direct mapping for framebuffer is required only if fb(4) is console.

XXX
It would be nice if we can remove reserved TLB entries after
fb(4) is properly attached.

Map framebuffer to virtual space when fb(4) is present,
even if it is not console.

For very MD codes for Explora, reorder things, and use more common codes for
ibm4xx and ibm40x for clarity as well as better comparison with other boards.

No functional changes intended.

Now, sys/arch/powerpc/ibm4xx/pic_uic.c requires opt_uic.h.

XXX
Switch to powerpc/conf/files.ibm4xx.

Change IBM4xx to use the common powerpc PIC framework.
Consolidate most ibm4xx initppc function into ibm4xx_init
and Make all IBM4xx use it.
Change explora to use initppc instead of bootstrap.

branches: 1.8.42;
Since files.wscons et al. are included by ~all ports anyway, include
them in the mi "files" file, and remove include statements from md files.
These shouldn't pull in additional kernel code when not in use, so it
shouldn't do any harm except a risk of namespace collisions which
should be easy to fix.

Interrupt handling changes, in discussion since February:

- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.

branches: 1.6.14; 1.6.32; 1.6.34; 1.6.40;
Bring ibm4xx interrupt code up to date:

- generic soft interrupts (ie. use powerpc/softintr.c)
- interrupt event counters (using the ones from powerpc/cpu.h:cpu_info
where appropriate)
- cleanup ibm4xx_intr.h, move implementation details to intr.c

Convert all affected evbppc platforms.

OK by simonb@, some points discussed with matt@

branches: 1.5.4; 1.5.8; 1.5.16;
merge ktrace-lwp.

branches: 1.4.16;
Abstract the interface between pckbc(4), and the pckbd(4) and pms(4)
drivers that attach to it. This allows for other host interface chips
that use the same keyboards and mice, such as the ones in the ARM
IOMD20, ARM7500, and SA-1111. The PC-compatible driver is still
called pckbc(4), and the new abstraction layer is "pckbport", so the
child devices have moved from sys/dev/pckbc to sys/dev/pckbport, which
also contains some code shared between all host controllers. To avoid
incompatibility, pckbdreg.h is still installed in
/usr/include/dev/pckbc.

In theory, this shouldn't cause any behavioural changes in the drivers
concerned. Thy just use rather more function pointers than before. Tested
on i386 and (with a new host driver) acorn32. Compiled on several other
affected architectures.

cleanup old lpt(4) attachment, and glue ppbus in so that they can coexist:
* lpt device is defined in MI place (dev/ppbus/files.ppbus), dev/ic/lpt.c
is included there too; dev/ic/lpt.c is not included if ppbus is
configured or if there is alternative platform lpt (like for pc532)
* g/c MD lpt definitions and custom puc/upc attachments,
glue moved to conf/files and dev/pci/files.pci respectively; remove
device lpt definition from dev/isa/files.isa
* add ppbus parport attribute, atppc device attachments, adjust plip and lpt
glue

Include arch/powerpc/ibm4xx/intr.c only if a particular board actually
uses the generic 4xx interrupt implementation.
There are some 4xx boards with entirely different interrupt controllers.

branches: 1.1.2;
Add a port to the NCD Explora451 ThinClient.

- Supported devices: le, com, lpt, pckbd, frame buffer.
- Support missing: phy, audio, pcmcia.
- Boots from network or md.

Approved by: Eduardo Horvath <eeh@netbsd.org>

Map framebuffer to virtual space when fb(4) is present,
even if it is not console.

For very MD codes for Explora, reorder things, and use more common codes for
ibm4xx and ibm40x for clarity as well as better comparison with other boards.

No functional changes intended.

Now, sys/arch/powerpc/ibm4xx/pic_uic.c requires opt_uic.h.

XXX
Switch to powerpc/conf/files.ibm4xx.

Change IBM4xx to use the common powerpc PIC framework.
Consolidate most ibm4xx initppc function into ibm4xx_init
and Make all IBM4xx use it.
Change explora to use initppc instead of bootstrap.

branches: 1.8.42;
Since files.wscons et al. are included by ~all ports anyway, include
them in the mi "files" file, and remove include statements from md files.
These shouldn't pull in additional kernel code when not in use, so it
shouldn't do any harm except a risk of namespace collisions which
should be easy to fix.

Interrupt handling changes, in discussion since February:

- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.

branches: 1.6.14; 1.6.32; 1.6.34; 1.6.40;
Bring ibm4xx interrupt code up to date:

- generic soft interrupts (ie. use powerpc/softintr.c)
- interrupt event counters (using the ones from powerpc/cpu.h:cpu_info
where appropriate)
- cleanup ibm4xx_intr.h, move implementation details to intr.c

Convert all affected evbppc platforms.

OK by simonb@, some points discussed with matt@

branches: 1.5.4; 1.5.8; 1.5.16;
merge ktrace-lwp.

branches: 1.4.16;
Abstract the interface between pckbc(4), and the pckbd(4) and pms(4)
drivers that attach to it. This allows for other host interface chips
that use the same keyboards and mice, such as the ones in the ARM
IOMD20, ARM7500, and SA-1111. The PC-compatible driver is still
called pckbc(4), and the new abstraction layer is "pckbport", so the
child devices have moved from sys/dev/pckbc to sys/dev/pckbport, which
also contains some code shared between all host controllers. To avoid
incompatibility, pckbdreg.h is still installed in
/usr/include/dev/pckbc.

In theory, this shouldn't cause any behavioural changes in the drivers
concerned. Thy just use rather more function pointers than before. Tested
on i386 and (with a new host driver) acorn32. Compiled on several other
affected architectures.

cleanup old lpt(4) attachment, and glue ppbus in so that they can coexist:
* lpt device is defined in MI place (dev/ppbus/files.ppbus), dev/ic/lpt.c
is included there too; dev/ic/lpt.c is not included if ppbus is
configured or if there is alternative platform lpt (like for pc532)
* g/c MD lpt definitions and custom puc/upc attachments,
glue moved to conf/files and dev/pci/files.pci respectively; remove
device lpt definition from dev/isa/files.isa
* add ppbus parport attribute, atppc device attachments, adjust plip and lpt
glue

Include arch/powerpc/ibm4xx/intr.c only if a particular board actually
uses the generic 4xx interrupt implementation.
There are some 4xx boards with entirely different interrupt controllers.

branches: 1.1.2;
Add a port to the NCD Explora451 ThinClient.

- Supported devices: le, com, lpt, pckbd, frame buffer.
- Support missing: phy, audio, pcmcia.
- Boots from network or md.

Approved by: Eduardo Horvath <eeh@netbsd.org>

Now, sys/arch/powerpc/ibm4xx/pic_uic.c requires opt_uic.h.

XXX
Switch to powerpc/conf/files.ibm4xx.

Change IBM4xx to use the common powerpc PIC framework.
Consolidate most ibm4xx initppc function into ibm4xx_init
and Make all IBM4xx use it.
Change explora to use initppc instead of bootstrap.

branches: 1.8.42;
Since files.wscons et al. are included by ~all ports anyway, include
them in the mi "files" file, and remove include statements from md files.
These shouldn't pull in additional kernel code when not in use, so it
shouldn't do any harm except a risk of namespace collisions which
should be easy to fix.

Interrupt handling changes, in discussion since February:

- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.

branches: 1.6.14; 1.6.32; 1.6.34; 1.6.40;
Bring ibm4xx interrupt code up to date:

- generic soft interrupts (ie. use powerpc/softintr.c)
- interrupt event counters (using the ones from powerpc/cpu.h:cpu_info
where appropriate)
- cleanup ibm4xx_intr.h, move implementation details to intr.c

Convert all affected evbppc platforms.

OK by simonb@, some points discussed with matt@

branches: 1.5.4; 1.5.8; 1.5.16;
merge ktrace-lwp.

branches: 1.4.16;
Abstract the interface between pckbc(4), and the pckbd(4) and pms(4)
drivers that attach to it. This allows for other host interface chips
that use the same keyboards and mice, such as the ones in the ARM
IOMD20, ARM7500, and SA-1111. The PC-compatible driver is still
called pckbc(4), and the new abstraction layer is "pckbport", so the
child devices have moved from sys/dev/pckbc to sys/dev/pckbport, which
also contains some code shared between all host controllers. To avoid
incompatibility, pckbdreg.h is still installed in
/usr/include/dev/pckbc.

In theory, this shouldn't cause any behavioural changes in the drivers
concerned. Thy just use rather more function pointers than before. Tested
on i386 and (with a new host driver) acorn32. Compiled on several other
affected architectures.

cleanup old lpt(4) attachment, and glue ppbus in so that they can coexist:
* lpt device is defined in MI place (dev/ppbus/files.ppbus), dev/ic/lpt.c
is included there too; dev/ic/lpt.c is not included if ppbus is
configured or if there is alternative platform lpt (like for pc532)
* g/c MD lpt definitions and custom puc/upc attachments,
glue moved to conf/files and dev/pci/files.pci respectively; remove
device lpt definition from dev/isa/files.isa
* add ppbus parport attribute, atppc device attachments, adjust plip and lpt
glue

Include arch/powerpc/ibm4xx/intr.c only if a particular board actually
uses the generic 4xx interrupt implementation.
There are some 4xx boards with entirely different interrupt controllers.

branches: 1.1.2;
Add a port to the NCD Explora451 ThinClient.

- Supported devices: le, com, lpt, pckbd, frame buffer.
- Support missing: phy, audio, pcmcia.
- Boots from network or md.

Approved by: Eduardo Horvath <eeh@netbsd.org>