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

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

s/boundries/boundaries/, s/itterate/iterate/ and few more typos.

compare pointers with NULL not nul.

branches: 1.121.4;
Switch cobalt to common bus_space.

Tested on raq 2

Cleanup and clarify the ELFSIZE mess:

We now have 2 variables automatically set in elf_machdep.h:

ARCH_ELFSIZE: the size for userland binaries
KERN_ELFSIZE: the size for the kernel binaries

DB_ELFSIZE has been deleted and KERN_ELFSIZE should have always the
same values DB_ELFSIZE used to have.

In sys/exec_elf.h, if ELFSIZE is not set, it is set to KERN_ELFSIZE
for the kernel and ARCH_ELFSIZE for userland. These defaults should
eliminate the need for most manual ELFSIZE setting.

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

uvm_setpagesize() is now subsumed within this funciton.

Fix RB_KDB by calling the debugger entry points after pmap_bootstrap, etc

branches: 1.117.2;
use cpu_startup_common

branches: 1.116.6;
GC nsym

use cpu_{g,s}etmodel

branches: 1.114.2; 1.114.4;
Fix -fno-common fallout.

Remove declartions of physmem

branches: 1.112.2;
Cleanup kernel files to use sys variants for bus.h, cpu.h, and intr.h
Use <mips/..> for db_machdep.h and psl.h

Remove leftover debug stuff.

Merge forward from matt-nb5-mips64.
(XXX generic kernels on raq2 die after interrupts are enabled but gxemul
works fine).

branches: 1.109.2; 1.109.4; 1.109.6;
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: 1.108.2;
Cleanup some messages.
Change arguments to sign extend properly.
GENERIC64 now gets to boot prompt in gxemul.

Enable mips64 support for cobalt.

Make cobalt build again.

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.

Use "defopt MODULAR" in sys/conf/files, and #include "opt_modular.h"
in all kernel sources that use the MODULAR option.
Proposed in tech-kern on 18 Jan 2009.

branches: 1.101.4;
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: 1.98.2; 1.98.4; 1.98.10;
Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

branches: 1.97.2;
Remove all initialization of obsolete ci_divisor_recip in
mips struct cpu_info and related macroes.
The member was prepared for a hack in MD microtime(9) implementation
but it has been superseded by MI timecounter(9).

Normalize my licenses.

branches: 1.95.2; 1.95.4; 1.95.6;
Use C99 initializer.

Reorganize interrupt handling on cobalt and allow multiple interrupts on
each icu irq to support multi function PCI devices in the Qube's PCI slot:

- split out interrupt stuff from machdep.c into new interrupt.c
- prepare struct *_intrhead to handle cpu and icu interrupts
- use LIST and malloc(9) to handle multiple interrupts per icu irq
(mostly taken from algor/pci/pcib.c and evbmips/malta/pci/pcib.c)
- move evcnt(9) stuff into *_intrhead from cobalt_intrhand
(i.e. make it per interrupt rather than per handler)
- in pci_intr_map(9) handle CPU interrupt separately and add a sanity check
- fixup interrupt lines for devices on the PCI slot in pci_conf_interrupt(9)
- move some device address definitions into <machine/cpu.h> and
remove <machine/leds.h>
- misc cosmetics

No objection on port-cobalt for three weeks.

Fix botched spl(9) bug I introduced back in 3.99.18 (rev 1.64):
Don't enable unhandled interrupts before all interrupts are processed.

Should fix "long download, network frozen" problems reported on
port-cobalt by several people.

branches: 1.92.2; 1.92.6;
Fix typo in macro name and comments.

In icu_intr_establish(), don't panic if the specified irq
is already in use and just return NULL instead.

Such situation could happen with devices which have
unconfigured PCI interrupt pins (because firmware
doesn't configure multiple function devices) and
each driver could handle the return value properly.

branches: 1.90.2; 1.90.6;
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: 1.89.2;
Assume netboot if "nfsroot=/path" is specified in bootstring.

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: 1.87.2; 1.87.6;
More style nits.

Some style nits.

Lookup boothowto flags in bootinfo.

branches: 1.84.4; 1.84.8;
Don't clear BSS even if ksyms(4) is not configured.

- Don't clear BSS in mach_init() if a kernel is loaded
by our native bootloader.
- Restore lwp0.l_cpu (which is required for curcpu()) and
cpu_info_store.ci_curlwp after clearing BSS in case
a kernel is loaded by the firmware directly since these
values are in BSS and initilized before mach_init() is called.
(actually they are restored in mips_machdep.c:mips_vector_init()
but we use curcpu() earlier than that point)

Fixes silent hang right after boot on cobalt.

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: 1.81.4;
Use char * where pointer arithmetics are required.

branches: 1.80.2; 1.80.4; 1.80.6;
semimechanically convert 'void foo' -> 'void *foo', as part of the continuing
caddr_t fallout.

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

TRUE -> true, FALSE -> false

branches: 1.77.2;
Remove hacks for now removed spllowersoftclock(9).

merge yamt-splraiseipl branch.

- finish implementing splraiseipl (and makeiplcookie).
http://mail-index.NetBSD.org/tech-kern/2006/07/01/0000.html
- complete workqueue(9) and fix its ipl problem, which is reported
to cause audio skipping.
- fix netbt (at least compilation problems) for some ports.
- fix PR/33218.

branches: 1.75.2; 1.75.4; 1.75.6;
Tweak status value in struct clockframe before calling mips3_clockintr()
so that spllowersoftclock(9) in hardclock(9) will be handled properly.

Change mips3_clockintr() to take (struct clockframe *) rather than
pc and status since it calls hardclock(9) anyway.
OK'ed by gdamore on port-mips.

Remove or comment out now unused code after MI mips3_clockintr migration.

branches: 1.72.2;
Convert to common mips3_cp0_counter clock.
Convert to timecounters.

From Rivo Nurges (rix at estpak dot ee). ok soren@, tested by simon@.
Note that this means we aren't using the gt clock, and maybe we should clean
that up a bit.

- always enable options MIPS3_ENABLE_CLOCK_INTR so that spllowerclock(9)
works properly
(XXX: the real fix is to implement proper CLFK_BASEPRI())
- prepare an independent statclock(9) handler which use MIPS3 CPU internal
clock interrupt. Enabled by options ENABLE_INT5_STATCLOCK, but not enabled
by default.

space nits.

Remove unneeded #include headers.

Use __predict_true() and __predict_false() in some critical handlers.

Cleanup ICU (i8259 compatible PIC) interrupt handling code:
- move ICU interrupt stuff from pci/pcib.h to cobalt/machdep.c
because ICU should be initialized before pcib is attached
- initialize ICU more properly
- check interrupt types and set ELCR (edge/level control registers)
accordingly in icu_intr_establish()
- check requested IRQ line and call only a necessary hander in icu_intr()
- use specific EOI to ack interrupts rather than AEOI
- use macro defined in <dev/ic/i8259reg.h>

branches: 1.66.2;
Fix an include path.

Account interrupts by evcnt(9).

Handle interrupts in priority order.

Make a local variable static.

- initialize cpuspeed and curcpu() according to cobalt model id
- switch to cpu cyclecounter based delay(9), taken from evbmips

- add prefix ih_ to cookie_type member in struct cobalt_intrhand
- clear the cookie type in disestablish functions
- some cosmetics

Identify cobalt models at boot and store it to a variable cobalt_id.
Tested on and Qube2 by several people on port-cobalt and my RaQ2.

Replace some magic numbers with macro.

Remove declaration for cpu_model[] since it's in <sys/systm.h>.

- ANSIfy
- KNF
- u_intXX_t -> uintXX_t

branches: 1.56.4; 1.56.6; 1.56.8; 1.56.10; 1.56.12;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.54.2;
Add const and fix for -Wshadow.

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: 1.52.4;
- Reset timer0 of GT64111 in gt_attach() and start it
in cpu_initclocks(9) via a callback function.
Fixes the "hardclock(9) is called before cpu_initclocks(9)" problem
reported by KIYOHARA Takashi on port-cobalt.
- Use bus_space(9) functions to access GT64111 registers and
add register definitions for GT64111 in gtreg.h.
(XXX this could be in sys/dev/marvell?)
- Move microtime(9) from machdep.c to clock.c, and read timer0 register
via a callback function. Also change microtime(9) like other ports
to guarantee that the time will be greater than the value obtained
by a previous call.

Tidy up messages for total/avail memory.

before:
---
NetBSD 2.0B (COLT) #67: Sat Apr 3 06:29:50 JST 2004
tsutsui@mirage:/usr/src/sys/arch/cobalt/compile/COLT
256 MB memory, 247 MB freemainbus0 (root)
com0 at mainbus0 addr 0x1c800000 level 3: st16650a, working fifo
com0: console
---
after:
---
NetBSD 2.0B (COLT) #68: Sat Apr 3 07:54:17 JST 2004
tsutsui@mirage:/usr/src/sys/arch/cobalt/compile/COLT
total memory = 256 MB
avail memory = 247 MB
mainbus0 (root)
com0 at mainbus0 addr 0x1c800000 level 3: st16650a, working fifo
com0: console
---

branches: 1.50.2;
Pass some info from the boot loader to the kernel:

- Kernel image name
- Symbol table
- A flag indicating console presence (could be clobbered if not passed)

Add _rtt() entry to the boot loader code.

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.

Use common mips generic software interrupt routines.

Remove a redundant function declaration.

TAB/space cleanup.

__KERNEL_RCSID()

branches: 1.43.2;
Call ksyms_init() instead of ddb_init() in case of
NKSYMS || defined(DDB) || defined(LKM)

Use PAGE_SIZE rather than NBPG.

Merge the nathanw_sa branch.

Don't include <sys/map.h>.

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

Garbage-collect cpu_sysctl(). From Shin'ichiro TAYA in PR-17888.

branches: 1.37.8;
Implement pci_intr_disestablish().

Make sure to hook into DDB/KGDB if so requested.

branches: 1.35.4;
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: 1.34.2;
bzero -> memset

branches: 1.33.2;
Change the way boot strings are handled and the way the root device
is determined. This allows multiple internal disks in a raq2 to work.

replace vm_map{,_entry}_t with struct vm_map{,_entry} *.

Do the first allocsys() pass (the pass that computes sizes) before
calling pmap_bootstrap(); pmap_bootstrap() needs some of the size
information computed by allocsys().

Sprinkle pmap_update() calls after calls to:
- pmap_enter()
- pmap_remove()
- pmap_protect()
- pmap_kenter_pa()
- pmap_kremove()
as described in pmap(9).

These calls are relatively conservative. It may be possible to
optimize these a little more.

Call pmap_bootstrap() before calling uvm_pageboot_alloc(), so that
the kernel virtual address space bounds will be set up.

Use uvm_pageboot_alloc() for early memory allocation, rather than
calling pmap_steal_memory() directly. On these platforms, since
uvm_pageboot_alloc() is a wrapper around pmap_steal_memory(), there
is no functional change. This is merely for API consistency.

eliminate the KERN_* error codes in favor of the traditional E* codes.
the mapping is:

KERN_SUCCESS 0
KERN_INVALID_ADDRESS EFAULT
KERN_PROTECTION_FAILURE EACCES
KERN_NO_SPACE ENOMEM
KERN_INVALID_ARGUMENT EINVAL
KERN_FAILURE various, mostly turn into KASSERTs
KERN_RESOURCE_SHORTAGE ENOMEM
KERN_NOT_RECEIVER <unused>
KERN_NO_ACCESS <unused>
KERN_PAGES_LOCKED <unused>

branches: 1.26.2;
db_machine_init() is no longer needed.
From Shigeji Ishikawa <psybear@ogre.rim.or.jp> in port-cobalt/12123.

Make softclock a generic soft interrupt of the API is available,
adding the requisite void * argument to softclock().

Consistently use pmap_steal_memory() to allocate USPACE.

branches: 1.23.2;
clean up and consistency for CP0 Count, Compare, Wired, and Config
access function names and prototypes.

add new macro BOOT_FLAG() (defined in <sys/boot_flag.h>) - this
maps standard boot flags to corresponding RB_* values
use BOOT_FLAG() in port's MD code as appropriate

as discussed on tech-kern, add new boot flags -v, -q for booting
verbosely or quietly, and corresponding AB_VERBOSE/AB_QUIET
boot flags; also add FreeBSD-compatible bootverbose macro and
NetBSD-specific bootquiet macro

for hpcmips, use new bootverbose instead of it's own hpcmips_verbose

Tested on i386, and to limited extend (compile of affected files) also for
mvme68k, hp300, luna68k, sun3.

Add an align argument to uvm_map() and some callers of that
routine. Works similarly fto pmap_prefer(), but allows callers
to specify a minimum power-of-two alignment of the region.
How we ever got along without this for so long is beyond me.

Use cpu_intr() definition from mips/cpu.h instead of local one.

Don't include <vm/vm.h>.

remove/move more mach vm header files:

<vm/pglist.h> -> <uvm/uvm_pglist.h>
<vm/vm_inherit.h> -> <uvm/uvm_inherit.h>
<vm/vm_kern.h> -> into <uvm/uvm_extern.h>
<vm/vm_object.h> -> nothing
<vm/vm_pager.h> -> into <uvm/uvm_pager.h>

also includes a bunch of <vm/vm_page.h> include removals (due to redudancy
with <vm/vm.h>), and a scattering of other similar headers.

branches: 1.17.2;
Reenable hard interrupts before processing soft interrupts.

branches: 1.16.2;
Remove stacktrace() prototype.

First sweep at scheduler state cleanup. Collect MI scheduler
state into global and per-CPU scheduler state:

- Global state: sched_qs (run queues), sched_whichqs (bitmap
of non-empty run queues), sched_slpque (sleep queues).
NOTE: These may collectively move into a struct schedstate
at some point in the future.

- Per-CPU state, struct schedstate_percpu: spc_runtime
(time process on this CPU started running), spc_flags
(replaces struct proc's p_schedflags), and
spc_curpriority (usrpri of processes on this CPU).

- Every platform must now supply a struct cpu_info and
a curcpu() macro. Simplify existing cpu_info declarations
where appropriate.

- All references to per-CPU scheduler state now made through
curcpu(). NOTE: this will likely be adjusted in the future
after further changes to struct proc are made.

Tested on i386 and Alpha. Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.

ECOFF hook is in arch/mips.

Add microtime().

Adapt to cpu_intr() change.

Backout the previous change; safepri is an evil idea after all.

MIPS1_PSL_LOWIPL -> PSL_LOWPSL. No functional change is expected.

Be a little more careful parsing boot parameters.

Typo.

Some cleanups.

- Nuke unnecessary cast.
- Change comments on cpu_startup() so as what it does (XXX found mostly
common across ports).
- Retain UNIX heritage of /* Good {morning,afternoon,evening,night} */.

Remove unnecessary bzero() op for proc0's USPACE as pmap_steal_memory()
returns a nullified area.

Make sure proc0 PCB has spl0 condition in CP0 status register field.

cpu_fork() mistakenly created processes forked by proc0, including
kthreads, in splhigh condition, because [1] proc0's PCB was zero
cleared during initialization, and [2] value 0 in status register
field made processes to have splhigh condition when CPU tick was
assigned for them. This mostly doesn't matter as forked processes
dive immediately into user mode through proc_trampoline code path,
however, kthreads never do that and remain in splhigh.

Reported by Ethan Solomita <ethan@geocast.com>.

Blocking soft interrupts can be useful..

Extend the evil interrupt kludge to the second ethernet.

NetBSD/cobalt. Work-in-progress.

s/boundries/boundaries/, s/itterate/iterate/ and few more typos.

compare pointers with NULL not nul.

branches: 1.121.4;
Switch cobalt to common bus_space.

Tested on raq 2

Cleanup and clarify the ELFSIZE mess:

We now have 2 variables automatically set in elf_machdep.h:

ARCH_ELFSIZE: the size for userland binaries
KERN_ELFSIZE: the size for the kernel binaries

DB_ELFSIZE has been deleted and KERN_ELFSIZE should have always the
same values DB_ELFSIZE used to have.

In sys/exec_elf.h, if ELFSIZE is not set, it is set to KERN_ELFSIZE
for the kernel and ARCH_ELFSIZE for userland. These defaults should
eliminate the need for most manual ELFSIZE setting.

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

uvm_setpagesize() is now subsumed within this funciton.

Fix RB_KDB by calling the debugger entry points after pmap_bootstrap, etc

branches: 1.117.2;
use cpu_startup_common

branches: 1.116.6;
GC nsym

use cpu_{g,s}etmodel

branches: 1.114.2; 1.114.4;
Fix -fno-common fallout.

Remove declartions of physmem

branches: 1.112.2;
Cleanup kernel files to use sys variants for bus.h, cpu.h, and intr.h
Use <mips/..> for db_machdep.h and psl.h

Remove leftover debug stuff.

Merge forward from matt-nb5-mips64.
(XXX generic kernels on raq2 die after interrupts are enabled but gxemul
works fine).

branches: 1.109.2; 1.109.4; 1.109.6;
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: 1.108.2;
Cleanup some messages.
Change arguments to sign extend properly.
GENERIC64 now gets to boot prompt in gxemul.

Enable mips64 support for cobalt.

Make cobalt build again.

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.

Use "defopt MODULAR" in sys/conf/files, and #include "opt_modular.h"
in all kernel sources that use the MODULAR option.
Proposed in tech-kern on 18 Jan 2009.

branches: 1.101.4;
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: 1.98.2; 1.98.4; 1.98.10;
Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

branches: 1.97.2;
Remove all initialization of obsolete ci_divisor_recip in
mips struct cpu_info and related macroes.
The member was prepared for a hack in MD microtime(9) implementation
but it has been superseded by MI timecounter(9).

Normalize my licenses.

branches: 1.95.2; 1.95.4; 1.95.6;
Use C99 initializer.

Reorganize interrupt handling on cobalt and allow multiple interrupts on
each icu irq to support multi function PCI devices in the Qube's PCI slot:

- split out interrupt stuff from machdep.c into new interrupt.c
- prepare struct *_intrhead to handle cpu and icu interrupts
- use LIST and malloc(9) to handle multiple interrupts per icu irq
(mostly taken from algor/pci/pcib.c and evbmips/malta/pci/pcib.c)
- move evcnt(9) stuff into *_intrhead from cobalt_intrhand
(i.e. make it per interrupt rather than per handler)
- in pci_intr_map(9) handle CPU interrupt separately and add a sanity check
- fixup interrupt lines for devices on the PCI slot in pci_conf_interrupt(9)
- move some device address definitions into <machine/cpu.h> and
remove <machine/leds.h>
- misc cosmetics

No objection on port-cobalt for three weeks.

Fix botched spl(9) bug I introduced back in 3.99.18 (rev 1.64):
Don't enable unhandled interrupts before all interrupts are processed.

Should fix "long download, network frozen" problems reported on
port-cobalt by several people.

branches: 1.92.2; 1.92.6;
Fix typo in macro name and comments.

In icu_intr_establish(), don't panic if the specified irq
is already in use and just return NULL instead.

Such situation could happen with devices which have
unconfigured PCI interrupt pins (because firmware
doesn't configure multiple function devices) and
each driver could handle the return value properly.

branches: 1.90.2; 1.90.6;
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: 1.89.2;
Assume netboot if "nfsroot=/path" is specified in bootstring.

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: 1.87.2; 1.87.6;
More style nits.

Some style nits.

Lookup boothowto flags in bootinfo.

branches: 1.84.4; 1.84.8;
Don't clear BSS even if ksyms(4) is not configured.

- Don't clear BSS in mach_init() if a kernel is loaded
by our native bootloader.
- Restore lwp0.l_cpu (which is required for curcpu()) and
cpu_info_store.ci_curlwp after clearing BSS in case
a kernel is loaded by the firmware directly since these
values are in BSS and initilized before mach_init() is called.
(actually they are restored in mips_machdep.c:mips_vector_init()
but we use curcpu() earlier than that point)

Fixes silent hang right after boot on cobalt.

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: 1.81.4;
Use char * where pointer arithmetics are required.

branches: 1.80.2; 1.80.4; 1.80.6;
semimechanically convert 'void foo' -> 'void *foo', as part of the continuing
caddr_t fallout.

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

TRUE -> true, FALSE -> false

branches: 1.77.2;
Remove hacks for now removed spllowersoftclock(9).

merge yamt-splraiseipl branch.

- finish implementing splraiseipl (and makeiplcookie).
http://mail-index.NetBSD.org/tech-kern/2006/07/01/0000.html
- complete workqueue(9) and fix its ipl problem, which is reported
to cause audio skipping.
- fix netbt (at least compilation problems) for some ports.
- fix PR/33218.

branches: 1.75.2; 1.75.4; 1.75.6;
Tweak status value in struct clockframe before calling mips3_clockintr()
so that spllowersoftclock(9) in hardclock(9) will be handled properly.

Change mips3_clockintr() to take (struct clockframe *) rather than
pc and status since it calls hardclock(9) anyway.
OK'ed by gdamore on port-mips.

Remove or comment out now unused code after MI mips3_clockintr migration.

branches: 1.72.2;
Convert to common mips3_cp0_counter clock.
Convert to timecounters.

From Rivo Nurges (rix at estpak dot ee). ok soren@, tested by simon@.
Note that this means we aren't using the gt clock, and maybe we should clean
that up a bit.

- always enable options MIPS3_ENABLE_CLOCK_INTR so that spllowerclock(9)
works properly
(XXX: the real fix is to implement proper CLFK_BASEPRI())
- prepare an independent statclock(9) handler which use MIPS3 CPU internal
clock interrupt. Enabled by options ENABLE_INT5_STATCLOCK, but not enabled
by default.

space nits.

Remove unneeded #include headers.

Use __predict_true() and __predict_false() in some critical handlers.

Cleanup ICU (i8259 compatible PIC) interrupt handling code:
- move ICU interrupt stuff from pci/pcib.h to cobalt/machdep.c
because ICU should be initialized before pcib is attached
- initialize ICU more properly
- check interrupt types and set ELCR (edge/level control registers)
accordingly in icu_intr_establish()
- check requested IRQ line and call only a necessary hander in icu_intr()
- use specific EOI to ack interrupts rather than AEOI
- use macro defined in <dev/ic/i8259reg.h>

branches: 1.66.2;
Fix an include path.

Account interrupts by evcnt(9).

Handle interrupts in priority order.

Make a local variable static.

- initialize cpuspeed and curcpu() according to cobalt model id
- switch to cpu cyclecounter based delay(9), taken from evbmips

- add prefix ih_ to cookie_type member in struct cobalt_intrhand
- clear the cookie type in disestablish functions
- some cosmetics

Identify cobalt models at boot and store it to a variable cobalt_id.
Tested on and Qube2 by several people on port-cobalt and my RaQ2.

Replace some magic numbers with macro.

Remove declaration for cpu_model[] since it's in <sys/systm.h>.

- ANSIfy
- KNF
- u_intXX_t -> uintXX_t

branches: 1.56.4; 1.56.6; 1.56.8; 1.56.10; 1.56.12;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.54.2;
Add const and fix for -Wshadow.

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: 1.52.4;
- Reset timer0 of GT64111 in gt_attach() and start it
in cpu_initclocks(9) via a callback function.
Fixes the "hardclock(9) is called before cpu_initclocks(9)" problem
reported by KIYOHARA Takashi on port-cobalt.
- Use bus_space(9) functions to access GT64111 registers and
add register definitions for GT64111 in gtreg.h.
(XXX this could be in sys/dev/marvell?)
- Move microtime(9) from machdep.c to clock.c, and read timer0 register
via a callback function. Also change microtime(9) like other ports
to guarantee that the time will be greater than the value obtained
by a previous call.

Tidy up messages for total/avail memory.

before:
---
NetBSD 2.0B (COLT) #67: Sat Apr 3 06:29:50 JST 2004
tsutsui@mirage:/usr/src/sys/arch/cobalt/compile/COLT
256 MB memory, 247 MB freemainbus0 (root)
com0 at mainbus0 addr 0x1c800000 level 3: st16650a, working fifo
com0: console
---
after:
---
NetBSD 2.0B (COLT) #68: Sat Apr 3 07:54:17 JST 2004
tsutsui@mirage:/usr/src/sys/arch/cobalt/compile/COLT
total memory = 256 MB
avail memory = 247 MB
mainbus0 (root)
com0 at mainbus0 addr 0x1c800000 level 3: st16650a, working fifo
com0: console
---

branches: 1.50.2;
Pass some info from the boot loader to the kernel:

- Kernel image name
- Symbol table
- A flag indicating console presence (could be clobbered if not passed)

Add _rtt() entry to the boot loader code.

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.

Use common mips generic software interrupt routines.

Remove a redundant function declaration.

TAB/space cleanup.

__KERNEL_RCSID()

branches: 1.43.2;
Call ksyms_init() instead of ddb_init() in case of
NKSYMS || defined(DDB) || defined(LKM)

Use PAGE_SIZE rather than NBPG.

Merge the nathanw_sa branch.

Don't include <sys/map.h>.

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

Garbage-collect cpu_sysctl(). From Shin'ichiro TAYA in PR-17888.

branches: 1.37.8;
Implement pci_intr_disestablish().

Make sure to hook into DDB/KGDB if so requested.

branches: 1.35.4;
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: 1.34.2;
bzero -> memset

branches: 1.33.2;
Change the way boot strings are handled and the way the root device
is determined. This allows multiple internal disks in a raq2 to work.

replace vm_map{,_entry}_t with struct vm_map{,_entry} *.

Do the first allocsys() pass (the pass that computes sizes) before
calling pmap_bootstrap(); pmap_bootstrap() needs some of the size
information computed by allocsys().

Sprinkle pmap_update() calls after calls to:
- pmap_enter()
- pmap_remove()
- pmap_protect()
- pmap_kenter_pa()
- pmap_kremove()
as described in pmap(9).

These calls are relatively conservative. It may be possible to
optimize these a little more.

Call pmap_bootstrap() before calling uvm_pageboot_alloc(), so that
the kernel virtual address space bounds will be set up.

Use uvm_pageboot_alloc() for early memory allocation, rather than
calling pmap_steal_memory() directly. On these platforms, since
uvm_pageboot_alloc() is a wrapper around pmap_steal_memory(), there
is no functional change. This is merely for API consistency.

eliminate the KERN_* error codes in favor of the traditional E* codes.
the mapping is:

KERN_SUCCESS 0
KERN_INVALID_ADDRESS EFAULT
KERN_PROTECTION_FAILURE EACCES
KERN_NO_SPACE ENOMEM
KERN_INVALID_ARGUMENT EINVAL
KERN_FAILURE various, mostly turn into KASSERTs
KERN_RESOURCE_SHORTAGE ENOMEM
KERN_NOT_RECEIVER <unused>
KERN_NO_ACCESS <unused>
KERN_PAGES_LOCKED <unused>

branches: 1.26.2;
db_machine_init() is no longer needed.
From Shigeji Ishikawa <psybear@ogre.rim.or.jp> in port-cobalt/12123.

Make softclock a generic soft interrupt of the API is available,
adding the requisite void * argument to softclock().

Consistently use pmap_steal_memory() to allocate USPACE.

branches: 1.23.2;
clean up and consistency for CP0 Count, Compare, Wired, and Config
access function names and prototypes.

add new macro BOOT_FLAG() (defined in <sys/boot_flag.h>) - this
maps standard boot flags to corresponding RB_* values
use BOOT_FLAG() in port's MD code as appropriate

as discussed on tech-kern, add new boot flags -v, -q for booting
verbosely or quietly, and corresponding AB_VERBOSE/AB_QUIET
boot flags; also add FreeBSD-compatible bootverbose macro and
NetBSD-specific bootquiet macro

for hpcmips, use new bootverbose instead of it's own hpcmips_verbose

Tested on i386, and to limited extend (compile of affected files) also for
mvme68k, hp300, luna68k, sun3.

Add an align argument to uvm_map() and some callers of that
routine. Works similarly fto pmap_prefer(), but allows callers
to specify a minimum power-of-two alignment of the region.
How we ever got along without this for so long is beyond me.

Use cpu_intr() definition from mips/cpu.h instead of local one.

Don't include <vm/vm.h>.

remove/move more mach vm header files:

<vm/pglist.h> -> <uvm/uvm_pglist.h>
<vm/vm_inherit.h> -> <uvm/uvm_inherit.h>
<vm/vm_kern.h> -> into <uvm/uvm_extern.h>
<vm/vm_object.h> -> nothing
<vm/vm_pager.h> -> into <uvm/uvm_pager.h>

also includes a bunch of <vm/vm_page.h> include removals (due to redudancy
with <vm/vm.h>), and a scattering of other similar headers.

branches: 1.17.2;
Reenable hard interrupts before processing soft interrupts.

branches: 1.16.2;
Remove stacktrace() prototype.

First sweep at scheduler state cleanup. Collect MI scheduler
state into global and per-CPU scheduler state:

- Global state: sched_qs (run queues), sched_whichqs (bitmap
of non-empty run queues), sched_slpque (sleep queues).
NOTE: These may collectively move into a struct schedstate
at some point in the future.

- Per-CPU state, struct schedstate_percpu: spc_runtime
(time process on this CPU started running), spc_flags
(replaces struct proc's p_schedflags), and
spc_curpriority (usrpri of processes on this CPU).

- Every platform must now supply a struct cpu_info and
a curcpu() macro. Simplify existing cpu_info declarations
where appropriate.

- All references to per-CPU scheduler state now made through
curcpu(). NOTE: this will likely be adjusted in the future
after further changes to struct proc are made.

Tested on i386 and Alpha. Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.

ECOFF hook is in arch/mips.

Add microtime().

Adapt to cpu_intr() change.

Backout the previous change; safepri is an evil idea after all.

MIPS1_PSL_LOWIPL -> PSL_LOWPSL. No functional change is expected.

Be a little more careful parsing boot parameters.

Typo.

Some cleanups.

- Nuke unnecessary cast.
- Change comments on cpu_startup() so as what it does (XXX found mostly
common across ports).
- Retain UNIX heritage of /* Good {morning,afternoon,evening,night} */.

Remove unnecessary bzero() op for proc0's USPACE as pmap_steal_memory()
returns a nullified area.

Make sure proc0 PCB has spl0 condition in CP0 status register field.

cpu_fork() mistakenly created processes forked by proc0, including
kthreads, in splhigh condition, because [1] proc0's PCB was zero
cleared during initialization, and [2] value 0 in status register
field made processes to have splhigh condition when CPU tick was
assigned for them. This mostly doesn't matter as forked processes
dive immediately into user mode through proc_trampoline code path,
however, kthreads never do that and remain in splhigh.

Reported by Ethan Solomita <ethan@geocast.com>.

Blocking soft interrupts can be useful..

Extend the evil interrupt kludge to the second ethernet.

NetBSD/cobalt. Work-in-progress.

compare pointers with NULL not nul.

Switch cobalt to common bus_space.

Tested on raq 2

Cleanup and clarify the ELFSIZE mess:

We now have 2 variables automatically set in elf_machdep.h:

ARCH_ELFSIZE: the size for userland binaries
KERN_ELFSIZE: the size for the kernel binaries

DB_ELFSIZE has been deleted and KERN_ELFSIZE should have always the
same values DB_ELFSIZE used to have.

In sys/exec_elf.h, if ELFSIZE is not set, it is set to KERN_ELFSIZE
for the kernel and ARCH_ELFSIZE for userland. These defaults should
eliminate the need for most manual ELFSIZE setting.

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

uvm_setpagesize() is now subsumed within this funciton.

Fix RB_KDB by calling the debugger entry points after pmap_bootstrap, etc

branches: 1.117.2;
use cpu_startup_common

branches: 1.116.6;
GC nsym

use cpu_{g,s}etmodel

branches: 1.114.2; 1.114.4;
Fix -fno-common fallout.

Remove declartions of physmem

branches: 1.112.2;
Cleanup kernel files to use sys variants for bus.h, cpu.h, and intr.h
Use <mips/..> for db_machdep.h and psl.h

Remove leftover debug stuff.

Merge forward from matt-nb5-mips64.
(XXX generic kernels on raq2 die after interrupts are enabled but gxemul
works fine).

branches: 1.109.2; 1.109.4; 1.109.6;
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: 1.108.2;
Cleanup some messages.
Change arguments to sign extend properly.
GENERIC64 now gets to boot prompt in gxemul.

Enable mips64 support for cobalt.

Make cobalt build again.

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.

Use "defopt MODULAR" in sys/conf/files, and #include "opt_modular.h"
in all kernel sources that use the MODULAR option.
Proposed in tech-kern on 18 Jan 2009.

branches: 1.101.4;
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: 1.98.2; 1.98.4; 1.98.10;
Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

branches: 1.97.2;
Remove all initialization of obsolete ci_divisor_recip in
mips struct cpu_info and related macroes.
The member was prepared for a hack in MD microtime(9) implementation
but it has been superseded by MI timecounter(9).

Normalize my licenses.

branches: 1.95.2; 1.95.4; 1.95.6;
Use C99 initializer.

Reorganize interrupt handling on cobalt and allow multiple interrupts on
each icu irq to support multi function PCI devices in the Qube's PCI slot:

- split out interrupt stuff from machdep.c into new interrupt.c
- prepare struct *_intrhead to handle cpu and icu interrupts
- use LIST and malloc(9) to handle multiple interrupts per icu irq
(mostly taken from algor/pci/pcib.c and evbmips/malta/pci/pcib.c)
- move evcnt(9) stuff into *_intrhead from cobalt_intrhand
(i.e. make it per interrupt rather than per handler)
- in pci_intr_map(9) handle CPU interrupt separately and add a sanity check
- fixup interrupt lines for devices on the PCI slot in pci_conf_interrupt(9)
- move some device address definitions into <machine/cpu.h> and
remove <machine/leds.h>
- misc cosmetics

No objection on port-cobalt for three weeks.

Fix botched spl(9) bug I introduced back in 3.99.18 (rev 1.64):
Don't enable unhandled interrupts before all interrupts are processed.

Should fix "long download, network frozen" problems reported on
port-cobalt by several people.

branches: 1.92.2; 1.92.6;
Fix typo in macro name and comments.

In icu_intr_establish(), don't panic if the specified irq
is already in use and just return NULL instead.

Such situation could happen with devices which have
unconfigured PCI interrupt pins (because firmware
doesn't configure multiple function devices) and
each driver could handle the return value properly.

branches: 1.90.2; 1.90.6;
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: 1.89.2;
Assume netboot if "nfsroot=/path" is specified in bootstring.

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: 1.87.2; 1.87.6;
More style nits.

Some style nits.

Lookup boothowto flags in bootinfo.

branches: 1.84.4; 1.84.8;
Don't clear BSS even if ksyms(4) is not configured.

- Don't clear BSS in mach_init() if a kernel is loaded
by our native bootloader.
- Restore lwp0.l_cpu (which is required for curcpu()) and
cpu_info_store.ci_curlwp after clearing BSS in case
a kernel is loaded by the firmware directly since these
values are in BSS and initilized before mach_init() is called.
(actually they are restored in mips_machdep.c:mips_vector_init()
but we use curcpu() earlier than that point)

Fixes silent hang right after boot on cobalt.

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: 1.81.4;
Use char * where pointer arithmetics are required.

branches: 1.80.2; 1.80.4; 1.80.6;
semimechanically convert 'void foo' -> 'void *foo', as part of the continuing
caddr_t fallout.

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

TRUE -> true, FALSE -> false

branches: 1.77.2;
Remove hacks for now removed spllowersoftclock(9).

merge yamt-splraiseipl branch.

- finish implementing splraiseipl (and makeiplcookie).
http://mail-index.NetBSD.org/tech-kern/2006/07/01/0000.html
- complete workqueue(9) and fix its ipl problem, which is reported
to cause audio skipping.
- fix netbt (at least compilation problems) for some ports.
- fix PR/33218.

branches: 1.75.2; 1.75.4; 1.75.6;
Tweak status value in struct clockframe before calling mips3_clockintr()
so that spllowersoftclock(9) in hardclock(9) will be handled properly.

Change mips3_clockintr() to take (struct clockframe *) rather than
pc and status since it calls hardclock(9) anyway.
OK'ed by gdamore on port-mips.

Remove or comment out now unused code after MI mips3_clockintr migration.

branches: 1.72.2;
Convert to common mips3_cp0_counter clock.
Convert to timecounters.

From Rivo Nurges (rix at estpak dot ee). ok soren@, tested by simon@.
Note that this means we aren't using the gt clock, and maybe we should clean
that up a bit.

- always enable options MIPS3_ENABLE_CLOCK_INTR so that spllowerclock(9)
works properly
(XXX: the real fix is to implement proper CLFK_BASEPRI())
- prepare an independent statclock(9) handler which use MIPS3 CPU internal
clock interrupt. Enabled by options ENABLE_INT5_STATCLOCK, but not enabled
by default.

space nits.

Remove unneeded #include headers.

Use __predict_true() and __predict_false() in some critical handlers.

Cleanup ICU (i8259 compatible PIC) interrupt handling code:
- move ICU interrupt stuff from pci/pcib.h to cobalt/machdep.c
because ICU should be initialized before pcib is attached
- initialize ICU more properly
- check interrupt types and set ELCR (edge/level control registers)
accordingly in icu_intr_establish()
- check requested IRQ line and call only a necessary hander in icu_intr()
- use specific EOI to ack interrupts rather than AEOI
- use macro defined in <dev/ic/i8259reg.h>

branches: 1.66.2;
Fix an include path.

Account interrupts by evcnt(9).

Handle interrupts in priority order.

Make a local variable static.

- initialize cpuspeed and curcpu() according to cobalt model id
- switch to cpu cyclecounter based delay(9), taken from evbmips

- add prefix ih_ to cookie_type member in struct cobalt_intrhand
- clear the cookie type in disestablish functions
- some cosmetics

Identify cobalt models at boot and store it to a variable cobalt_id.
Tested on and Qube2 by several people on port-cobalt and my RaQ2.

Replace some magic numbers with macro.

Remove declaration for cpu_model[] since it's in <sys/systm.h>.

- ANSIfy
- KNF
- u_intXX_t -> uintXX_t

branches: 1.56.4; 1.56.6; 1.56.8; 1.56.10; 1.56.12;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.54.2;
Add const and fix for -Wshadow.

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: 1.52.4;
- Reset timer0 of GT64111 in gt_attach() and start it
in cpu_initclocks(9) via a callback function.
Fixes the "hardclock(9) is called before cpu_initclocks(9)" problem
reported by KIYOHARA Takashi on port-cobalt.
- Use bus_space(9) functions to access GT64111 registers and
add register definitions for GT64111 in gtreg.h.
(XXX this could be in sys/dev/marvell?)
- Move microtime(9) from machdep.c to clock.c, and read timer0 register
via a callback function. Also change microtime(9) like other ports
to guarantee that the time will be greater than the value obtained
by a previous call.

Tidy up messages for total/avail memory.

before:
---
NetBSD 2.0B (COLT) #67: Sat Apr 3 06:29:50 JST 2004
tsutsui@mirage:/usr/src/sys/arch/cobalt/compile/COLT
256 MB memory, 247 MB freemainbus0 (root)
com0 at mainbus0 addr 0x1c800000 level 3: st16650a, working fifo
com0: console
---
after:
---
NetBSD 2.0B (COLT) #68: Sat Apr 3 07:54:17 JST 2004
tsutsui@mirage:/usr/src/sys/arch/cobalt/compile/COLT
total memory = 256 MB
avail memory = 247 MB
mainbus0 (root)
com0 at mainbus0 addr 0x1c800000 level 3: st16650a, working fifo
com0: console
---

branches: 1.50.2;
Pass some info from the boot loader to the kernel:

- Kernel image name
- Symbol table
- A flag indicating console presence (could be clobbered if not passed)

Add _rtt() entry to the boot loader code.

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.

Use common mips generic software interrupt routines.

Remove a redundant function declaration.

TAB/space cleanup.

__KERNEL_RCSID()

branches: 1.43.2;
Call ksyms_init() instead of ddb_init() in case of
NKSYMS || defined(DDB) || defined(LKM)

Use PAGE_SIZE rather than NBPG.

Merge the nathanw_sa branch.

Don't include <sys/map.h>.

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

Garbage-collect cpu_sysctl(). From Shin'ichiro TAYA in PR-17888.

branches: 1.37.8;
Implement pci_intr_disestablish().

Make sure to hook into DDB/KGDB if so requested.

branches: 1.35.4;
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: 1.34.2;
bzero -> memset

branches: 1.33.2;
Change the way boot strings are handled and the way the root device
is determined. This allows multiple internal disks in a raq2 to work.

replace vm_map{,_entry}_t with struct vm_map{,_entry} *.

Do the first allocsys() pass (the pass that computes sizes) before
calling pmap_bootstrap(); pmap_bootstrap() needs some of the size
information computed by allocsys().

Sprinkle pmap_update() calls after calls to:
- pmap_enter()
- pmap_remove()
- pmap_protect()
- pmap_kenter_pa()
- pmap_kremove()
as described in pmap(9).

These calls are relatively conservative. It may be possible to
optimize these a little more.

Call pmap_bootstrap() before calling uvm_pageboot_alloc(), so that
the kernel virtual address space bounds will be set up.

Use uvm_pageboot_alloc() for early memory allocation, rather than
calling pmap_steal_memory() directly. On these platforms, since
uvm_pageboot_alloc() is a wrapper around pmap_steal_memory(), there
is no functional change. This is merely for API consistency.

eliminate the KERN_* error codes in favor of the traditional E* codes.
the mapping is:

KERN_SUCCESS 0
KERN_INVALID_ADDRESS EFAULT
KERN_PROTECTION_FAILURE EACCES
KERN_NO_SPACE ENOMEM
KERN_INVALID_ARGUMENT EINVAL
KERN_FAILURE various, mostly turn into KASSERTs
KERN_RESOURCE_SHORTAGE ENOMEM
KERN_NOT_RECEIVER <unused>
KERN_NO_ACCESS <unused>
KERN_PAGES_LOCKED <unused>

branches: 1.26.2;
db_machine_init() is no longer needed.
From Shigeji Ishikawa <psybear@ogre.rim.or.jp> in port-cobalt/12123.

Make softclock a generic soft interrupt of the API is available,
adding the requisite void * argument to softclock().

Consistently use pmap_steal_memory() to allocate USPACE.

branches: 1.23.2;
clean up and consistency for CP0 Count, Compare, Wired, and Config
access function names and prototypes.

add new macro BOOT_FLAG() (defined in <sys/boot_flag.h>) - this
maps standard boot flags to corresponding RB_* values
use BOOT_FLAG() in port's MD code as appropriate

as discussed on tech-kern, add new boot flags -v, -q for booting
verbosely or quietly, and corresponding AB_VERBOSE/AB_QUIET
boot flags; also add FreeBSD-compatible bootverbose macro and
NetBSD-specific bootquiet macro

for hpcmips, use new bootverbose instead of it's own hpcmips_verbose

Tested on i386, and to limited extend (compile of affected files) also for
mvme68k, hp300, luna68k, sun3.

Add an align argument to uvm_map() and some callers of that
routine. Works similarly fto pmap_prefer(), but allows callers
to specify a minimum power-of-two alignment of the region.
How we ever got along without this for so long is beyond me.

Use cpu_intr() definition from mips/cpu.h instead of local one.

Don't include <vm/vm.h>.

remove/move more mach vm header files:

<vm/pglist.h> -> <uvm/uvm_pglist.h>
<vm/vm_inherit.h> -> <uvm/uvm_inherit.h>
<vm/vm_kern.h> -> into <uvm/uvm_extern.h>
<vm/vm_object.h> -> nothing
<vm/vm_pager.h> -> into <uvm/uvm_pager.h>

also includes a bunch of <vm/vm_page.h> include removals (due to redudancy
with <vm/vm.h>), and a scattering of other similar headers.

branches: 1.17.2;
Reenable hard interrupts before processing soft interrupts.

branches: 1.16.2;
Remove stacktrace() prototype.

First sweep at scheduler state cleanup. Collect MI scheduler
state into global and per-CPU scheduler state:

- Global state: sched_qs (run queues), sched_whichqs (bitmap
of non-empty run queues), sched_slpque (sleep queues).
NOTE: These may collectively move into a struct schedstate
at some point in the future.

- Per-CPU state, struct schedstate_percpu: spc_runtime
(time process on this CPU started running), spc_flags
(replaces struct proc's p_schedflags), and
spc_curpriority (usrpri of processes on this CPU).

- Every platform must now supply a struct cpu_info and
a curcpu() macro. Simplify existing cpu_info declarations
where appropriate.

- All references to per-CPU scheduler state now made through
curcpu(). NOTE: this will likely be adjusted in the future
after further changes to struct proc are made.

Tested on i386 and Alpha. Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.

ECOFF hook is in arch/mips.

Add microtime().

Adapt to cpu_intr() change.

Backout the previous change; safepri is an evil idea after all.

MIPS1_PSL_LOWIPL -> PSL_LOWPSL. No functional change is expected.

Be a little more careful parsing boot parameters.

Typo.

Some cleanups.

- Nuke unnecessary cast.
- Change comments on cpu_startup() so as what it does (XXX found mostly
common across ports).
- Retain UNIX heritage of /* Good {morning,afternoon,evening,night} */.

Remove unnecessary bzero() op for proc0's USPACE as pmap_steal_memory()
returns a nullified area.

Make sure proc0 PCB has spl0 condition in CP0 status register field.

cpu_fork() mistakenly created processes forked by proc0, including
kthreads, in splhigh condition, because [1] proc0's PCB was zero
cleared during initialization, and [2] value 0 in status register
field made processes to have splhigh condition when CPU tick was
assigned for them. This mostly doesn't matter as forked processes
dive immediately into user mode through proc_trampoline code path,
however, kthreads never do that and remain in splhigh.

Reported by Ethan Solomita <ethan@geocast.com>.

Blocking soft interrupts can be useful..

Extend the evil interrupt kludge to the second ethernet.

NetBSD/cobalt. Work-in-progress.

Switch cobalt to common bus_space.

Tested on raq 2

Cleanup and clarify the ELFSIZE mess:

We now have 2 variables automatically set in elf_machdep.h:

ARCH_ELFSIZE: the size for userland binaries
KERN_ELFSIZE: the size for the kernel binaries

DB_ELFSIZE has been deleted and KERN_ELFSIZE should have always the
same values DB_ELFSIZE used to have.

In sys/exec_elf.h, if ELFSIZE is not set, it is set to KERN_ELFSIZE
for the kernel and ARCH_ELFSIZE for userland. These defaults should
eliminate the need for most manual ELFSIZE setting.

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

uvm_setpagesize() is now subsumed within this funciton.

Fix RB_KDB by calling the debugger entry points after pmap_bootstrap, etc

branches: 1.117.2;
use cpu_startup_common

branches: 1.116.6;
GC nsym

use cpu_{g,s}etmodel

branches: 1.114.2; 1.114.4;
Fix -fno-common fallout.

Remove declartions of physmem

branches: 1.112.2;
Cleanup kernel files to use sys variants for bus.h, cpu.h, and intr.h
Use <mips/..> for db_machdep.h and psl.h

Remove leftover debug stuff.

Merge forward from matt-nb5-mips64.
(XXX generic kernels on raq2 die after interrupts are enabled but gxemul
works fine).

branches: 1.109.2; 1.109.4; 1.109.6;
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: 1.108.2;
Cleanup some messages.
Change arguments to sign extend properly.
GENERIC64 now gets to boot prompt in gxemul.

Enable mips64 support for cobalt.

Make cobalt build again.

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.

Use "defopt MODULAR" in sys/conf/files, and #include "opt_modular.h"
in all kernel sources that use the MODULAR option.
Proposed in tech-kern on 18 Jan 2009.

branches: 1.101.4;
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: 1.98.2; 1.98.4; 1.98.10;
Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

branches: 1.97.2;
Remove all initialization of obsolete ci_divisor_recip in
mips struct cpu_info and related macroes.
The member was prepared for a hack in MD microtime(9) implementation
but it has been superseded by MI timecounter(9).

Normalize my licenses.

branches: 1.95.2; 1.95.4; 1.95.6;
Use C99 initializer.

Reorganize interrupt handling on cobalt and allow multiple interrupts on
each icu irq to support multi function PCI devices in the Qube's PCI slot:

- split out interrupt stuff from machdep.c into new interrupt.c
- prepare struct *_intrhead to handle cpu and icu interrupts
- use LIST and malloc(9) to handle multiple interrupts per icu irq
(mostly taken from algor/pci/pcib.c and evbmips/malta/pci/pcib.c)
- move evcnt(9) stuff into *_intrhead from cobalt_intrhand
(i.e. make it per interrupt rather than per handler)
- in pci_intr_map(9) handle CPU interrupt separately and add a sanity check
- fixup interrupt lines for devices on the PCI slot in pci_conf_interrupt(9)
- move some device address definitions into <machine/cpu.h> and
remove <machine/leds.h>
- misc cosmetics

No objection on port-cobalt for three weeks.

Fix botched spl(9) bug I introduced back in 3.99.18 (rev 1.64):
Don't enable unhandled interrupts before all interrupts are processed.

Should fix "long download, network frozen" problems reported on
port-cobalt by several people.

branches: 1.92.2; 1.92.6;
Fix typo in macro name and comments.

In icu_intr_establish(), don't panic if the specified irq
is already in use and just return NULL instead.

Such situation could happen with devices which have
unconfigured PCI interrupt pins (because firmware
doesn't configure multiple function devices) and
each driver could handle the return value properly.

branches: 1.90.2; 1.90.6;
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: 1.89.2;
Assume netboot if "nfsroot=/path" is specified in bootstring.