Move the at-shutdown call to resettodr() from cpu_reboot() to kern_reboot().

It's a small step, but it's a step.

Add some compile time asserts for endianness on boards/systems that
only support a single endianness.

remove duplicate symbol now published in shared mips.

switch all ports to use uvm_init.c:uvm_md_init()

uvm_setpagesize() is now subsumed within this funciton.

branches: 1.54.2;
Use cpu_startup_common()

branches: 1.53.6;
use cpu_{g,s}etmodel

branches: 1.52.2; 1.52.4;
Remove conflicting/redundant common declarations.

branches: 1.51.2; 1.51.6;
Allow algor kernels to be built under either algor/algor64 or
evbmips-el/evbmips64-el. Note that MAXMAPARITITONS and majors numbers
differ between the two ports which is why two kernels are still needed.

#include <sys/bus.h> instead of <machine/bus.h>.

Merge forward from matt-nb5-mips64.
Adapt to new interrupt/spl framework.

Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.47.2; 1.47.4;
Retire struct user, remove sys/user.h inclusions. Note sys/user.h header
as obsolete. Remove USER_TO_UAREA/UAREA_TO_USER macros.

Various #include fixes and review by matt@.

curlwp needs sys/lwp.h.

branches: 1.45.2;
Remove separate mb_map. The nmbclusters is computed at boot time based
on the amount of physical memory and limited by NMBCLUSTERS if present.
Architectures without direct mapping also limit it based on the kmem_map
size, which is used as backing store. On i386 and ARM, the maximum KVA
used for mbuf clusters is limited to 64MB by default.

The old default limits and limits based on GATEWAY have been removed.
key_registered_sb_max is hard-wired to a value derived from 2048
clusters.

branches: 1.44.2;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

- 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.

As discussed on tech-kern: mutex_init is too heavyweight for early bootstrap
phases, so move the initialization of the ksyms mutex back into main via
a function called ksyms_init. Rename the existing (but quite different)
ksyms_init* variations into ksyms_addsyms_elf() and ksyms_addsyms_explicit()
and adapt machdep code accordingly.

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

It is not appropriate to call pmf_system_shutdown(9) from
doshutdownhooks(9): shutdown hooks registered by shutdownhook_establish(9)
expect to be called with interrupts disabled, but shutdown hooks
registered with pmf_device_register1(9) expect to be called with
interrupts enabled. So I have made two changes:

1 Do not call pmf_system_shutdown() from doshutdownhooks(). Instead,
change every call to doshutdownhooks() to a call to doshutdownhooks()
followed by a call to pmf_system_shutdown(). No functional change
is intended by this change.

2 Make i386 re-enable interrupts briefly while it calls
pmf_system_shutdown(). I leave it to others either to fix the
other ports, or to factor out some MI shutdown code, as joerg@
suggests, and fix that. Note that a functional change *is* intended
by this change.

I hope that this patch will stop us from flip-flopping between
calling doshutdownhooks() and pmf_system_shutdown() sometimes with
and sometimes without interrupts enabled.

branches: 1.38.2; 1.38.4; 1.38.10;
Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

branches: 1.37.2; 1.37.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.36.16; 1.36.18; 1.36.20;
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: 1.35.10;
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: 1.34.2; 1.34.4; 1.34.10;
Cast to char* before doing pointer arithmetic.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

TRUE -> true, FALSE -> false

branches: 1.31.14;
Remove declarations for cpu_model[] since it's in <sys/systm.h>.

branches: 1.30.2; 1.30.4; 1.30.6;
Remove the ugly algor_get_ethaddr() hack. We have a properties infrastructure
now, so use that to provide the Ethernet address of the built-in Ethernet.
XXX Still a little ugly in the tlp driver, but fixing that would require
XXX reworking the SROM usage in a broader sense.

While here, do the P4032 DMA window hack in device_register() as well.

branches: 1.29.2; 1.29.4; 1.29.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.27.2;
Move the MI printing of `copyright' to the MD cpu_startup() code
where the printing of `version' is already performed.
This has the benefit of allowing the copyright to be available
via dmesg(8) on platforms which need the `msgbuf' to be setup
in cpu_startup() before printed output is remembered.

branches: 1.26.8;
Replace the traditional buffer memory management -- based on fixed per buffer
virtual memory reservation and a private pool of memory pages -- by a scheme
based on memory pools.

This allows better utilization of memory because buffers can now be allocated
with a granularity finer than the system's native page size (useful for
filesystems with e.g. 1k or 2k fragment sizes). It also avoids fragmentation
of virtual to physical memory mappings (due to the former fixed virtual
address reservation) resulting in better utilization of MMU resources on some
platforms. Finally, the scheme is more flexible by allowing run-time decisions
on the amount of memory to be used for buffers.

On the other hand, the effectiveness of the LRU queue for buffer recycling
may be somewhat reduced compared to the traditional method since, due to the
nature of the pool based memory allocation, the actual least recently used
buffer may release its memory to a pool different from the one needed by a
newly allocated buffer. However, this effect will kick in only if the
system is under memory pressure.

Cast through (void *) to appease gcc3.
XXX1 - why does this "type-punned pointer" warning only affect little-
endian MIPS and not big-endian MIPS?!
XXX2 - too much duplicated code.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

add __KERNEL_RCSID()

branches: 1.22.2;
Extend the P5064 and P6032 comcnattach() with a type argument as well,
I'm assuming these both use COM_TYPE_NORMAL.

Handle 64bit DMA addresses on PCI for platforms that can (currently only
enabled on amd64). Add a dmat64 field to various PCI attach structures,
and pass it down where needed. Implement a simple new function called
pci_dma64_available(pa) to test if 64bit DMA addresses may be used.
This returns 1 iff _PCI_HAVE_DMA64 is defined in <machine/pci_machdep.h>,
and there is more than 4G of memory.

Also pass a type argument to comcnattach() and com_kgdb_attach().
comspeed() (and thus cominit()) may need this information.

Call ksyms_init() instead of ddb_init() in case of
NKSYMS || defined(DDB) || defined(LKM)

Use PAGE_SIZE rather than NBPG.
XXX Except for one place, which will require more work.

Merge the nathanw_sa branch.

Make nbuf, nswbuf, and bufpages unsigned. Make all operations on these
variables unsigned, and update places where their values are printed.

Merge cpu_sysctl() for all mips ports, based on powerpc and m68k precedent.

For now, only pmax implements CPU_BOOTED_KERNEL. Need to revisit.

branches: 1.14.8;
<sys/sysctl.h> doesn't need to be after <uvm/uvm_extern.h> anymore, put
it with the other <sys/_foo_.h> include files.

branches: 1.13.4;
Update pmap_update to now take the updated pmap as an argument.
This will allow improvements to the pmaps so that they can more easily defer expensive operations, eg tlb/cache flush, til the last possible moment.

Currently this is a no-op on most platforms, so they should see no difference.

Reviewed by Jason.

branches: 1.12.2;
Allow a keypress on the console to transition from "halted" to "returning
to monitor".

branches: 1.11.2;
Deal with different `memsize' convention on new PMON revs.

Check in work-in-progress of P-6032 support. This is not tested,
but is meant for back-up purposes.

Add MEMSIZE and ETHADDR options, so that they can be set in
the kernel config file, in case you have a buggy PMON which
doesn't provide the environment variables to the kernel.

Initlialize PMON after configuring the console, so we can see
debugging info.

Oops, use the correct space tag when unmapping the RTC on the
P-4032 after calibrating the clock.

Rewrite the interrupt handling code:
- Compute the number of CPU pipeline cycles per second using the
mc146818.
- Use the COMPARE interrupt for the hardclock interrupt.
- Collapse all interrupt priorities into a single priority, and use
the CPU interrupt inputs to determine the interrupt source (local
device, PCI device, ISA device, etc.)

This allows us to have interrupt sharing.

Add support for the Algorithmics P-4032 board. This is totally
untested, since I have no P-4032 board, but it's no worse than
the current situation, which is "totally non-working P-4032
support in the ARC port, of all places".

Fix minor typos.

add missing #include "opt_kgdb.h"

Initialize DDB at boot time and break into it if the "d" argument
is specified to the kernel.

XXX PMON doen't load symbols for us -- need a dbsym(1) for ELF.

A port to the Algorithmics MIPS evaluation boards. We currently
support the P-5064, which has a QED RM5xxx CPU soldered on.

There is some skeletal support for the P-4032 (an older board, which
had an R4xxx CPU). There are some placeholders for the P-6032, which
is their newest board, but no real code yet (the P-6032 has a different
PCI controller, the Algorithmics BONITO).

There are still some (apprently softintr-related) problems with the
algor kernel, but it works well-enough to self-host.

Kudos to Allegro Networks for loaning me a P-5064 board on which to do
the port.

Add some compile time asserts for endianness on boards/systems that
only support a single endianness.

remove duplicate symbol now published in shared mips.

switch all ports to use uvm_init.c:uvm_md_init()

uvm_setpagesize() is now subsumed within this funciton.

branches: 1.54.2;
Use cpu_startup_common()

branches: 1.53.6;
use cpu_{g,s}etmodel

branches: 1.52.2; 1.52.4;
Remove conflicting/redundant common declarations.

branches: 1.51.2; 1.51.6;
Allow algor kernels to be built under either algor/algor64 or
evbmips-el/evbmips64-el. Note that MAXMAPARITITONS and majors numbers
differ between the two ports which is why two kernels are still needed.

#include <sys/bus.h> instead of <machine/bus.h>.

Merge forward from matt-nb5-mips64.
Adapt to new interrupt/spl framework.

Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.47.2; 1.47.4;
Retire struct user, remove sys/user.h inclusions. Note sys/user.h header
as obsolete. Remove USER_TO_UAREA/UAREA_TO_USER macros.

Various #include fixes and review by matt@.

curlwp needs sys/lwp.h.

branches: 1.45.2;
Remove separate mb_map. The nmbclusters is computed at boot time based
on the amount of physical memory and limited by NMBCLUSTERS if present.
Architectures without direct mapping also limit it based on the kmem_map
size, which is used as backing store. On i386 and ARM, the maximum KVA
used for mbuf clusters is limited to 64MB by default.

The old default limits and limits based on GATEWAY have been removed.
key_registered_sb_max is hard-wired to a value derived from 2048
clusters.

branches: 1.44.2;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

- 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.

As discussed on tech-kern: mutex_init is too heavyweight for early bootstrap
phases, so move the initialization of the ksyms mutex back into main via
a function called ksyms_init. Rename the existing (but quite different)
ksyms_init* variations into ksyms_addsyms_elf() and ksyms_addsyms_explicit()
and adapt machdep code accordingly.

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

It is not appropriate to call pmf_system_shutdown(9) from
doshutdownhooks(9): shutdown hooks registered by shutdownhook_establish(9)
expect to be called with interrupts disabled, but shutdown hooks
registered with pmf_device_register1(9) expect to be called with
interrupts enabled. So I have made two changes:

1 Do not call pmf_system_shutdown() from doshutdownhooks(). Instead,
change every call to doshutdownhooks() to a call to doshutdownhooks()
followed by a call to pmf_system_shutdown(). No functional change
is intended by this change.

2 Make i386 re-enable interrupts briefly while it calls
pmf_system_shutdown(). I leave it to others either to fix the
other ports, or to factor out some MI shutdown code, as joerg@
suggests, and fix that. Note that a functional change *is* intended
by this change.

I hope that this patch will stop us from flip-flopping between
calling doshutdownhooks() and pmf_system_shutdown() sometimes with
and sometimes without interrupts enabled.

branches: 1.38.2; 1.38.4; 1.38.10;
Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

branches: 1.37.2; 1.37.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.36.16; 1.36.18; 1.36.20;
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: 1.35.10;
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: 1.34.2; 1.34.4; 1.34.10;
Cast to char* before doing pointer arithmetic.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

TRUE -> true, FALSE -> false

branches: 1.31.14;
Remove declarations for cpu_model[] since it's in <sys/systm.h>.

branches: 1.30.2; 1.30.4; 1.30.6;
Remove the ugly algor_get_ethaddr() hack. We have a properties infrastructure
now, so use that to provide the Ethernet address of the built-in Ethernet.
XXX Still a little ugly in the tlp driver, but fixing that would require
XXX reworking the SROM usage in a broader sense.

While here, do the P4032 DMA window hack in device_register() as well.

branches: 1.29.2; 1.29.4; 1.29.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.27.2;
Move the MI printing of `copyright' to the MD cpu_startup() code
where the printing of `version' is already performed.
This has the benefit of allowing the copyright to be available
via dmesg(8) on platforms which need the `msgbuf' to be setup
in cpu_startup() before printed output is remembered.

branches: 1.26.8;
Replace the traditional buffer memory management -- based on fixed per buffer
virtual memory reservation and a private pool of memory pages -- by a scheme
based on memory pools.

This allows better utilization of memory because buffers can now be allocated
with a granularity finer than the system's native page size (useful for
filesystems with e.g. 1k or 2k fragment sizes). It also avoids fragmentation
of virtual to physical memory mappings (due to the former fixed virtual
address reservation) resulting in better utilization of MMU resources on some
platforms. Finally, the scheme is more flexible by allowing run-time decisions
on the amount of memory to be used for buffers.

On the other hand, the effectiveness of the LRU queue for buffer recycling
may be somewhat reduced compared to the traditional method since, due to the
nature of the pool based memory allocation, the actual least recently used
buffer may release its memory to a pool different from the one needed by a
newly allocated buffer. However, this effect will kick in only if the
system is under memory pressure.

Cast through (void *) to appease gcc3.
XXX1 - why does this "type-punned pointer" warning only affect little-
endian MIPS and not big-endian MIPS?!
XXX2 - too much duplicated code.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

add __KERNEL_RCSID()

branches: 1.22.2;
Extend the P5064 and P6032 comcnattach() with a type argument as well,
I'm assuming these both use COM_TYPE_NORMAL.

Handle 64bit DMA addresses on PCI for platforms that can (currently only
enabled on amd64). Add a dmat64 field to various PCI attach structures,
and pass it down where needed. Implement a simple new function called
pci_dma64_available(pa) to test if 64bit DMA addresses may be used.
This returns 1 iff _PCI_HAVE_DMA64 is defined in <machine/pci_machdep.h>,
and there is more than 4G of memory.

Also pass a type argument to comcnattach() and com_kgdb_attach().
comspeed() (and thus cominit()) may need this information.

Call ksyms_init() instead of ddb_init() in case of
NKSYMS || defined(DDB) || defined(LKM)

Use PAGE_SIZE rather than NBPG.
XXX Except for one place, which will require more work.

Merge the nathanw_sa branch.

Make nbuf, nswbuf, and bufpages unsigned. Make all operations on these
variables unsigned, and update places where their values are printed.

Merge cpu_sysctl() for all mips ports, based on powerpc and m68k precedent.

For now, only pmax implements CPU_BOOTED_KERNEL. Need to revisit.

branches: 1.14.8;
<sys/sysctl.h> doesn't need to be after <uvm/uvm_extern.h> anymore, put
it with the other <sys/_foo_.h> include files.

branches: 1.13.4;
Update pmap_update to now take the updated pmap as an argument.
This will allow improvements to the pmaps so that they can more easily defer expensive operations, eg tlb/cache flush, til the last possible moment.

Currently this is a no-op on most platforms, so they should see no difference.

Reviewed by Jason.

branches: 1.12.2;
Allow a keypress on the console to transition from "halted" to "returning
to monitor".

branches: 1.11.2;
Deal with different `memsize' convention on new PMON revs.

Check in work-in-progress of P-6032 support. This is not tested,
but is meant for back-up purposes.

Add MEMSIZE and ETHADDR options, so that they can be set in
the kernel config file, in case you have a buggy PMON which
doesn't provide the environment variables to the kernel.

Initlialize PMON after configuring the console, so we can see
debugging info.

Oops, use the correct space tag when unmapping the RTC on the
P-4032 after calibrating the clock.

Rewrite the interrupt handling code:
- Compute the number of CPU pipeline cycles per second using the
mc146818.
- Use the COMPARE interrupt for the hardclock interrupt.
- Collapse all interrupt priorities into a single priority, and use
the CPU interrupt inputs to determine the interrupt source (local
device, PCI device, ISA device, etc.)

This allows us to have interrupt sharing.

Add support for the Algorithmics P-4032 board. This is totally
untested, since I have no P-4032 board, but it's no worse than
the current situation, which is "totally non-working P-4032
support in the ARC port, of all places".

Fix minor typos.

add missing #include "opt_kgdb.h"

Initialize DDB at boot time and break into it if the "d" argument
is specified to the kernel.

XXX PMON doen't load symbols for us -- need a dbsym(1) for ELF.

A port to the Algorithmics MIPS evaluation boards. We currently
support the P-5064, which has a QED RM5xxx CPU soldered on.

There is some skeletal support for the P-4032 (an older board, which
had an R4xxx CPU). There are some placeholders for the P-6032, which
is their newest board, but no real code yet (the P-6032 has a different
PCI controller, the Algorithmics BONITO).

There are still some (apprently softintr-related) problems with the
algor kernel, but it works well-enough to self-host.

Kudos to Allegro Networks for loaning me a P-5064 board on which to do
the port.

switch all ports to use uvm_init.c:uvm_md_init()

uvm_setpagesize() is now subsumed within this funciton.

Use cpu_startup_common()

branches: 1.53.6;
use cpu_{g,s}etmodel

branches: 1.52.2; 1.52.4;
Remove conflicting/redundant common declarations.

branches: 1.51.2; 1.51.6;
Allow algor kernels to be built under either algor/algor64 or
evbmips-el/evbmips64-el. Note that MAXMAPARITITONS and majors numbers
differ between the two ports which is why two kernels are still needed.

#include <sys/bus.h> instead of <machine/bus.h>.

Merge forward from matt-nb5-mips64.
Adapt to new interrupt/spl framework.

Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.47.2; 1.47.4;
Retire struct user, remove sys/user.h inclusions. Note sys/user.h header
as obsolete. Remove USER_TO_UAREA/UAREA_TO_USER macros.

Various #include fixes and review by matt@.

curlwp needs sys/lwp.h.

branches: 1.45.2;
Remove separate mb_map. The nmbclusters is computed at boot time based
on the amount of physical memory and limited by NMBCLUSTERS if present.
Architectures without direct mapping also limit it based on the kmem_map
size, which is used as backing store. On i386 and ARM, the maximum KVA
used for mbuf clusters is limited to 64MB by default.

The old default limits and limits based on GATEWAY have been removed.
key_registered_sb_max is hard-wired to a value derived from 2048
clusters.

branches: 1.44.2;
Merge from matt-nb5-mips64
Merge mips-specific arch files.

- 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.

As discussed on tech-kern: mutex_init is too heavyweight for early bootstrap
phases, so move the initialization of the ksyms mutex back into main via
a function called ksyms_init. Rename the existing (but quite different)
ksyms_init* variations into ksyms_addsyms_elf() and ksyms_addsyms_explicit()
and adapt machdep code accordingly.

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

It is not appropriate to call pmf_system_shutdown(9) from
doshutdownhooks(9): shutdown hooks registered by shutdownhook_establish(9)
expect to be called with interrupts disabled, but shutdown hooks
registered with pmf_device_register1(9) expect to be called with
interrupts enabled. So I have made two changes:

1 Do not call pmf_system_shutdown() from doshutdownhooks(). Instead,
change every call to doshutdownhooks() to a call to doshutdownhooks()
followed by a call to pmf_system_shutdown(). No functional change
is intended by this change.

2 Make i386 re-enable interrupts briefly while it calls
pmf_system_shutdown(). I leave it to others either to fix the
other ports, or to factor out some MI shutdown code, as joerg@
suggests, and fix that. Note that a functional change *is* intended
by this change.

I hope that this patch will stop us from flip-flopping between
calling doshutdownhooks() and pmf_system_shutdown() sometimes with
and sometimes without interrupts enabled.

branches: 1.38.2; 1.38.4; 1.38.10;
Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

branches: 1.37.2; 1.37.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.36.16; 1.36.18; 1.36.20;
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: 1.35.10;
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: 1.34.2; 1.34.4; 1.34.10;
Cast to char* before doing pointer arithmetic.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

TRUE -> true, FALSE -> false

branches: 1.31.14;
Remove declarations for cpu_model[] since it's in <sys/systm.h>.

branches: 1.30.2; 1.30.4; 1.30.6;
Remove the ugly algor_get_ethaddr() hack. We have a properties infrastructure
now, so use that to provide the Ethernet address of the built-in Ethernet.
XXX Still a little ugly in the tlp driver, but fixing that would require
XXX reworking the SROM usage in a broader sense.

While here, do the P4032 DMA window hack in device_register() as well.

branches: 1.29.2; 1.29.4; 1.29.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.27.2;
Move the MI printing of `copyright' to the MD cpu_startup() code
where the printing of `version' is already performed.
This has the benefit of allowing the copyright to be available
via dmesg(8) on platforms which need the `msgbuf' to be setup
in cpu_startup() before printed output is remembered.

branches: 1.26.8;
Replace the traditional buffer memory management -- based on fixed per buffer
virtual memory reservation and a private pool of memory pages -- by a scheme
based on memory pools.

This allows better utilization of memory because buffers can now be allocated
with a granularity finer than the system's native page size (useful for
filesystems with e.g. 1k or 2k fragment sizes). It also avoids fragmentation
of virtual to physical memory mappings (due to the former fixed virtual
address reservation) resulting in better utilization of MMU resources on some
platforms. Finally, the scheme is more flexible by allowing run-time decisions
on the amount of memory to be used for buffers.

On the other hand, the effectiveness of the LRU queue for buffer recycling
may be somewhat reduced compared to the traditional method since, due to the
nature of the pool based memory allocation, the actual least recently used
buffer may release its memory to a pool different from the one needed by a
newly allocated buffer. However, this effect will kick in only if the
system is under memory pressure.

Cast through (void *) to appease gcc3.
XXX1 - why does this "type-punned pointer" warning only affect little-
endian MIPS and not big-endian MIPS?!
XXX2 - too much duplicated code.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

add __KERNEL_RCSID()

branches: 1.22.2;
Extend the P5064 and P6032 comcnattach() with a type argument as well,
I'm assuming these both use COM_TYPE_NORMAL.

Handle 64bit DMA addresses on PCI for platforms that can (currently only
enabled on amd64). Add a dmat64 field to various PCI attach structures,
and pass it down where needed. Implement a simple new function called
pci_dma64_available(pa) to test if 64bit DMA addresses may be used.
This returns 1 iff _PCI_HAVE_DMA64 is defined in <machine/pci_machdep.h>,
and there is more than 4G of memory.

Also pass a type argument to comcnattach() and com_kgdb_attach().
comspeed() (and thus cominit()) may need this information.

Call ksyms_init() instead of ddb_init() in case of
NKSYMS || defined(DDB) || defined(LKM)

Use PAGE_SIZE rather than NBPG.
XXX Except for one place, which will require more work.

Merge the nathanw_sa branch.

Make nbuf, nswbuf, and bufpages unsigned. Make all operations on these
variables unsigned, and update places where their values are printed.

Merge cpu_sysctl() for all mips ports, based on powerpc and m68k precedent.

For now, only pmax implements CPU_BOOTED_KERNEL. Need to revisit.

branches: 1.14.8;
<sys/sysctl.h> doesn't need to be after <uvm/uvm_extern.h> anymore, put
it with the other <sys/_foo_.h> include files.

branches: 1.13.4;
Update pmap_update to now take the updated pmap as an argument.
This will allow improvements to the pmaps so that they can more easily defer expensive operations, eg tlb/cache flush, til the last possible moment.

Currently this is a no-op on most platforms, so they should see no difference.

Reviewed by Jason.

branches: 1.12.2;
Allow a keypress on the console to transition from "halted" to "returning
to monitor".

branches: 1.11.2;
Deal with different `memsize' convention on new PMON revs.

Check in work-in-progress of P-6032 support. This is not tested,
but is meant for back-up purposes.

Add MEMSIZE and ETHADDR options, so that they can be set in
the kernel config file, in case you have a buggy PMON which
doesn't provide the environment variables to the kernel.

Initlialize PMON after configuring the console, so we can see
debugging info.

Oops, use the correct space tag when unmapping the RTC on the
P-4032 after calibrating the clock.

Rewrite the interrupt handling code:
- Compute the number of CPU pipeline cycles per second using the
mc146818.
- Use the COMPARE interrupt for the hardclock interrupt.
- Collapse all interrupt priorities into a single priority, and use
the CPU interrupt inputs to determine the interrupt source (local
device, PCI device, ISA device, etc.)

This allows us to have interrupt sharing.

Add support for the Algorithmics P-4032 board. This is totally
untested, since I have no P-4032 board, but it's no worse than
the current situation, which is "totally non-working P-4032
support in the ARC port, of all places".

Fix minor typos.

add missing #include "opt_kgdb.h"

Initialize DDB at boot time and break into it if the "d" argument
is specified to the kernel.

XXX PMON doen't load symbols for us -- need a dbsym(1) for ELF.

A port to the Algorithmics MIPS evaluation boards. We currently
support the P-5064, which has a QED RM5xxx CPU soldered on.

There is some skeletal support for the P-4032 (an older board, which
had an R4xxx CPU). There are some placeholders for the P-6032, which
is their newest board, but no real code yet (the P-6032 has a different
PCI controller, the Algorithmics BONITO).

There are still some (apprently softintr-related) problems with the
algor kernel, but it works well-enough to self-host.

Kudos to Allegro Networks for loaning me a P-5064 board on which to do
the port.