branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8; 1.2.12;
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: 1.1.2;
file files.ipi was initially added on branch ppcoea-renovation.

intr.h must not include cpu due to deadly embrace with SOFTINT_COUNT.
Cleanup intr.h so MD definitions can overload common definitions.
Rototill pic/intr.c. Virtual IRQs can now be reclaimed. separate virq
from hwirq from picirq. Redo intr mask calculations.
tested on pmppc and macppc (MP).

enable FAST_SOFTINTR support for all ports that use powerpc/pic/
This has been successfully tested on macppc
TODO:
- ibm4xx needs to be adapted
- SMP doesn't work yet, 2nd CPU crashes when trying to leave the idle loop

Remove <machine/atomic.h>; use <sys/atomic.h> instead.
Add <powerpc/cpuset.h> (for mpc85xx pmap).
Add some initial MP code for mpc85xx
Rework ipi code to be common across all ppcs
Change PPC to keep curlwp in %r13 while in the kernel.
Move astpending from cpu_info to mdlwp
Improve cpu_need_resched to be more MP friendly.

branches: 1.4.4; 1.4.6; 1.4.10;
- Have pic_mpcsoc.c to adapt variations of Moto/Freescale OpenPIC
compliant interrupt controllers. Mostly the refrain of pic_openpic.c
and shall be useful for 85xx/86xx/QorIQ and Tundra product lines.

branches: 1.3.10;
Add support to ofppc for the IBM 7044-270 machine. This is a POWER3-II
based machine. Currently the kernel to run on this machine is
incompatible with the standard GENERIC kernel, so for now, we have a
separate GENERIC_B64. Eventually, I hope to combine the two.

Please note, this is a port of 32bit ofppc, not a powerpc64 port.

Thanks to Matt Thomas and Kevin Bowling for helping to make this port
possible.

Summary of changes:

Change ofwpci to use the ofmethod config for configuring the PCI bus,
rather than indirect configuration.
Move the wiring of the interrupt controllers from at the start of the
boot, into the configuration of the first PCI bus.
Rewrite the map_isa_ioregs() hack to work on a machine without BATs
Fix a ton of bugs in the genofw_find_pics routine, and in the map_space code.
Split the pic_openpic into openpic_common and pic_openpic.
Create a new pic_distopenpic driver, for the distributed openpic found on
some newer IBM machines.
Fix a bad panic in pmap_extract on 64bit bridge mode

branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8; 1.2.14;
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: 1.1.2; 1.1.6; 1.1.8;
file files.pic was initially added on branch ppcoea-renovation.

Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

branches: 1.6.2; 1.6.6;
<arch/powerpc/... -> <powerpc/...

Use <sys/foo.h> instead of <machine/foo.h> if such a file exists.
Don't assume <sys/cpu.h> includes <powerpc/subarch/cpu*.h>. Include it
explicitly.

branches: 1.4.32;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.8; 1.3.10; 1.3.12;
Fix the endless stream of 7's problem on i8259-like interrupt controllers
once and for all. The i8259 does not like to be read in a loop, when an
interrupt comes in, it will return a valid value, however, if you keep
reading it until there are no outstanding interrupts, it will return 7
(which is the lpt interrupt). Change the pic handler to give an argument
to the get_irq functions of mode, which indicates if this is the first
time we are asking, or if we are just rechecking in a loop. Non-i8259
handlers can safely ignore this argument.

Tested to fix the stream of 7's problem on prep and ofppc. Got rid of
the nasty hack in ofppc with this too, and the prep machine seems to take
less interrupts now, which is a good thing.

branches: 1.2.2; 1.2.4; 1.2.8; 1.2.10; 1.2.12; 1.2.14;
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: 1.1.2; 1.1.6; 1.1.8;
file i8259_common.c was initially added on branch ppcoea-renovation.

add a function to find a PIC by its base address

powerpc: Don't enable interrupts before calling cascaded intr handler.

Before calling a normal interrupt handler, the pic code adjusts cpl and
enables interrupts. Don't do this with interrupt sources that feed
cascaded pics as the resulting handler will do it anyway, and it can
result in multiple interrupts firing on the parent pic just to service
a single interrupt on the child.

powerpc: Mask interrupts after returning from handler.

Now that we are explicitly masking interrupts on entry of pic_handle_intr,
we need to disable (instead of store) interrupts after calling
intr_deliver.

powerpc: Fix ci_ipending corruption with cascaded pics

A cascaded pic will register pic_handle_intr as its interrupt handler,
but interrupt handlers are called with MSR[EE] = 1. This breaks
assumptions in pic callbacks and can result in eg. corrupt ci_ipending
due to a read/modify/write of the field with nested interrupts.

Fix this by always clearing MSR[EE] at the top of pic_handle_intr.

branches: 1.34.4; 1.34.10;
powerpc: Sprinkle "memory" clobbers on eieio and nearby asm blocks.

Otherwise the compiler may reorder these around loads and stores,
which mostly defeats the purpose. `asm volatile' just ensures the
instruction isn't _deleted_; it may still move around.

KNF

Brush up previous, or make things more similar to x86:

- Prevent pic_name from appearing vmstat(1) twice.
- Restore "irq" in interrupt id fields of intrctl(8).

For these purposes,

- Add is_evname member to struct intr_source.
- Bump size of is_source to INTRIDBUF, and rename it to is_intrid for clarity.

Now, outputs from vmstat(1) and intrctl(8) are like:

----
$ vmstat -ev
...
openpic irq 39 3967 26 intr
...
$ intrctl list
interrupt id CPU0 device name(s)
...
openpic irq 39 3967* wdc1
...
----

branches: 1.31.2;
Include PIC name to interrupt source, instead of just "irq", so that
it appears in "interrupt id" field of intrctl(8).

Should be useful when multiple PICs are simultaneously available as in
405EX (where uic[12] are cascaded to uic0).

Turn imask into static.

XXX
Other macro etc. in powerpc/intr.h should also be moved into
powerpc/pic/intr.c, or protected by __INTR_PRIVATE.

branches: 1.29.2;
Include missing opt_ppcarch.h.

Style and cosmetic changes. No binary changes intended.

eieio is implemented as sync on 40x. Therefore, "sync; eieio" and
"eieio; sync" can be replaced by a single sync.

branches: 1.26.4; 1.26.6;
Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)

branches: 1.25.14; 1.25.16;
Added MSI/MSI-X and interrupt_distribute(9) support for powerpc.

branches: 1.24.2;
treat IPIs like regular interrupts at IPL_HIGH
should fix port-powerpc/44387
tested by chuq

branches: 1.23.2; 1.23.16;
when calculating per-IPL virq masks, take into account that shared IRQs may
request different IPLs
fixes vr(4)-related problems seen on ofppc

fix same thinko as in previous commit, in have_pending_intr_p()

look at the right cpu_softints bits in pic_do_pending_int()
so we call the right softint handlers

branches: 1.20.2;
Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

Some PICs have the capability to define the interrupt's polarity (OpenPIC
for example). So the accepted interrupt types have been extended to:
- IST_EDGE_FALLING (which is the same as IST_EDGE)
- IST_EDGE_RISING (new)
- IST_LEVEL_LOW (is the same as IST_LEVEL)
- IST_LEVEL_HIGH (new)
Old code will continue to work without modification.

branches: 1.18.2; 1.18.6;
Modify *ASSERTMSG() so they are now used as variadic macros. The main goal
is to provide routines that do as KASSERT(9) says: append a message
to the panic format string when the assertion triggers, with optional
arguments.

Fix call sites to reflect the new definition.

Discussed on tech-kern@. See
http://mail-index.netbsd.org/tech-kern/2011/09/07/msg011427.html

Make it compile when PIC_DEBUG is defined.

Cleanup includes. Explicitly include <powerpc/psl.h>

intr.h must not include cpu due to deadly embrace with SOFTINT_COUNT.
Cleanup intr.h so MD definitions can overload common definitions.
Rototill pic/intr.c. Virtual IRQs can now be reclaimed. separate virq
from hwirq from picirq. Redo intr mask calculations.
tested on pmppc and macppc (MP).

Change from level to ipl since we aren't dealing a mask anymore, just a
simple value.
Fix intr_calculatemasks to deal with ipl isn't a mask. Let establish
and disestablish determine the highest ipl for the interrut source being
modified. No reason to recompute that for every source when only one changes
at a time. Only change idepth while in the loop.

Make sure OEA ports without __HAVE_FAST_SOFTINTS still compile.

enable FAST_SOFTINTR support for all ports that use powerpc/pic/
This has been successfully tested on macppc
TODO:
- ibm4xx needs to be adapted
- SMP doesn't work yet, 2nd CPU crashes when trying to leave the idle loop

Remove <machine/atomic.h>; use <sys/atomic.h> instead.
Add <powerpc/cpuset.h> (for mpc85xx pmap).
Add some initial MP code for mpc85xx
Rework ipi code to be common across all ppcs
Change PPC to keep curlwp in %r13 while in the kernel.
Move astpending from cpu_info to mdlwp
Improve cpu_need_resched to be more MP friendly.

branches: 1.10.2; 1.10.6;
Move counting of faults, traps, intrs, soft[intr]s, syscalls, and nswtch
from uvmexp to per-cpu cpu_data and move them to 64bits. Remove unneeded
includes of <uvm/uvm_extern.h> and/or <uvm/uvm.h>.

make this work again

Support 64-bit imask for powerpc/pic.

branches: 1.7.2;
Remove white-spaces.

branches: 1.6.20;
Convert to new 2 clause license

branches: 1.5.2; 1.5.4;
SMP support for ofppc. (finally) Much thanks to Matt Thomas for help in
figuring out all the crazy nuances of getting this working, and to
Michael Lorenz for testing/fixing my changes on macppc. Tested with a
quad-proc 7044-270.
Summary of changes:

Bumped CPU_MAXNUM to 16 on ofppc.
Added md_* routines to ofppc/cpu.c, to sync the timebase, and awaken the CPUs.
Fixed a bug in the test for a 64bit bridge cpu early in locore.S
Added code to set the interrupt priority for all CPUs with an openpic.
Change rtas to probe before cpus, to allow use of the rtas freeze/thaw
timebase code routines.
Fix CPU_INFO_FOREACH macro to iterate through detected cpus, not CPU_MAXNUM.
Change most uses of ci_cpuid to ci_index, to deal with CPUs that do not allow
writing to SPR_PIR. Don't write SPR_PIR unless the secondary cpu identifies
itself as 0.
Change the hatchstack/interrupt stack allocations to allocate a 8192byte
interrupt stack, and a 4096 byte hatch stack, align them to 16 bytes, and
allocate them no lower than 0x10000. Allocate them separately to prevent the
hatch stack corrupting the interrupt stack later on.
If the CPU is a 64bit cpu, copy SPR_ASR in cpu_hatch()
Set the idle stack to ci->ci_data.cpu_idlelwp->l_addr->u_pcb.pcb_sp.
Add OF_start_cpu(). Add a routine to ofwoea_initppc to spin up secondary
procs early, and place them into a spinloop waiting for the hatch routines
to be ready.
Modify the ipi routines to deal with openpics that reverse byte order on read
from an ipi register. (such as on the 7044)
Change the rtas setup to allocate the rtas physical base address above
the kernel, to avoid mucking up the hatch/interrupt stacks.

branches: 1.4.8;
Fix the endless stream of 7's problem on i8259-like interrupt controllers
once and for all. The i8259 does not like to be read in a loop, when an
interrupt comes in, it will return a valid value, however, if you keep
reading it until there are no outstanding interrupts, it will return 7
(which is the lpt interrupt). Change the pic handler to give an argument
to the get_irq functions of mode, which indicates if this is the first
time we are asking, or if we are just rechecking in a loop. Non-i8259
handlers can safely ignore this argument.

Tested to fix the stream of 7's problem on prep and ofppc. Got rid of
the nasty hack in ofppc with this too, and the prep machine seems to take
less interrupts now, which is a good thing.

branches: 1.3.2; 1.3.4; 1.3.6;
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: 1.2.2; 1.2.4; 1.2.6; 1.2.8;
Merge the ppcoea-renovation branch to HEAD.

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

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

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

branches: 1.1.2; 1.1.6; 1.1.8;
file intr.c was initially added on branch ppcoea-renovation.

Drop unused opt_altivec.h, opt_interrupt.h, opt_ipi.h, and opt_pic.h.

Style and cosmetic changes. No binary changes intended.

Fix false sharing problems with cpu_info. Identified with tprof(8).
This was a very nice win in my tests on a 48 CPU box.

- Reorganise cpu_data slightly according to usage.
- Put cpu_onproc into struct cpu_info alongside ci_curlwp (now is ci_onproc).
- On x86, put some items in their own cache lines according to usage, like
the IPI bitmask and ci_want_resched.

Add IPI_AST.

branches: 1.12.18;
ddb MP support

branches: 1.11.4;
Implement MI IPI interface with cross-call support.

branches: 1.10.12; 1.10.26;
Cleanup includes. Explicitly include <powerpc/psl.h>

Remove <machine/atomic.h>; use <sys/atomic.h> instead.
Add <powerpc/cpuset.h> (for mpc85xx pmap).
Add some initial MP code for mpc85xx
Rework ipi code to be common across all ppcs
Change PPC to keep curlwp in %r13 while in the kernel.
Move astpending from cpu_info to mdlwp
Improve cpu_need_resched to be more MP friendly.

branches: 1.8.2;
Move powerpc to use pcu to manage FPU/AltiVec/SPE.

Fix some fallout from building the macppc GENERIC.MP.

branches: 1.6.2;
Add missing sys/xcall.h inclusion, remove sys/malloc.h one.

Implement high priority (XC_HIGHPRI) xcall(9) mechanism - a facility
to execute functions from software interrupt context, at SOFTINT_CLOCK.
Functions must be lightweight. Will be used for passive serialization.

OK ad@.

branches: 1.4.20; 1.4.22;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.2; 1.3.4;
SMP support for ofppc. (finally) Much thanks to Matt Thomas for help in
figuring out all the crazy nuances of getting this working, and to
Michael Lorenz for testing/fixing my changes on macppc. Tested with a
quad-proc 7044-270.
Summary of changes:

Bumped CPU_MAXNUM to 16 on ofppc.
Added md_* routines to ofppc/cpu.c, to sync the timebase, and awaken the CPUs.
Fixed a bug in the test for a 64bit bridge cpu early in locore.S
Added code to set the interrupt priority for all CPUs with an openpic.
Change rtas to probe before cpus, to allow use of the rtas freeze/thaw
timebase code routines.
Fix CPU_INFO_FOREACH macro to iterate through detected cpus, not CPU_MAXNUM.
Change most uses of ci_cpuid to ci_index, to deal with CPUs that do not allow
writing to SPR_PIR. Don't write SPR_PIR unless the secondary cpu identifies
itself as 0.
Change the hatchstack/interrupt stack allocations to allocate a 8192byte
interrupt stack, and a 4096 byte hatch stack, align them to 16 bytes, and
allocate them no lower than 0x10000. Allocate them separately to prevent the
hatch stack corrupting the interrupt stack later on.
If the CPU is a 64bit cpu, copy SPR_ASR in cpu_hatch()
Set the idle stack to ci->ci_data.cpu_idlelwp->l_addr->u_pcb.pcb_sp.
Add OF_start_cpu(). Add a routine to ofwoea_initppc to spin up secondary
procs early, and place them into a spinloop waiting for the hatch routines
to be ready.
Modify the ipi routines to deal with openpics that reverse byte order on read
from an ipi register. (such as on the 7044)
Change the rtas setup to allocate the rtas physical base address above
the kernel, to avoid mucking up the hatch/interrupt stacks.

branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8; 1.2.12; 1.2.26;
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: 1.1.2;
file ipi.c was initially added on branch ppcoea-renovation.

Convert to intr_establish_xname().

branches: 1.9.2;
Style and cosmetic changes. No binary changes intended.

treat IPIs like regular interrupts at IPL_HIGH
should fix port-powerpc/44387
tested by chuq

branches: 1.7.6; 1.7.24;
Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

branches: 1.6.2; 1.6.6;
<arch/powerpc/... -> <powerpc/...

Remove <machine/atomic.h>; use <sys/atomic.h> instead.
Add <powerpc/cpuset.h> (for mpc85xx pmap).
Add some initial MP code for mpc85xx
Rework ipi code to be common across all ppcs
Change PPC to keep curlwp in %r13 while in the kernel.
Move astpending from cpu_info to mdlwp
Improve cpu_need_resched to be more MP friendly.

branches: 1.4.22; 1.4.28; 1.4.32;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.2; 1.3.4;
SMP support for ofppc. (finally) Much thanks to Matt Thomas for help in
figuring out all the crazy nuances of getting this working, and to
Michael Lorenz for testing/fixing my changes on macppc. Tested with a
quad-proc 7044-270.
Summary of changes:

Bumped CPU_MAXNUM to 16 on ofppc.
Added md_* routines to ofppc/cpu.c, to sync the timebase, and awaken the CPUs.
Fixed a bug in the test for a 64bit bridge cpu early in locore.S
Added code to set the interrupt priority for all CPUs with an openpic.
Change rtas to probe before cpus, to allow use of the rtas freeze/thaw
timebase code routines.
Fix CPU_INFO_FOREACH macro to iterate through detected cpus, not CPU_MAXNUM.
Change most uses of ci_cpuid to ci_index, to deal with CPUs that do not allow
writing to SPR_PIR. Don't write SPR_PIR unless the secondary cpu identifies
itself as 0.
Change the hatchstack/interrupt stack allocations to allocate a 8192byte
interrupt stack, and a 4096 byte hatch stack, align them to 16 bytes, and
allocate them no lower than 0x10000. Allocate them separately to prevent the
hatch stack corrupting the interrupt stack later on.
If the CPU is a 64bit cpu, copy SPR_ASR in cpu_hatch()
Set the idle stack to ci->ci_data.cpu_idlelwp->l_addr->u_pcb.pcb_sp.
Add OF_start_cpu(). Add a routine to ofwoea_initppc to spin up secondary
procs early, and place them into a spinloop waiting for the hatch routines
to be ready.
Modify the ipi routines to deal with openpics that reverse byte order on read
from an ipi register. (such as on the 7044)
Change the rtas setup to allocate the rtas physical base address above
the kernel, to avoid mucking up the hatch/interrupt stacks.

branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8; 1.2.12; 1.2.26;
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: 1.1.2;
file ipi_openpic.c was initially added on branch ppcoea-renovation.

Revert previous for now:
http://mail-index.netbsd.org/source-changes/2020/04/16/msg116278.html

The reasoning turned out to be wrong; __KERNEL_RCSID() in header files
does *not* overwrite RCSID in main source files. The real problem is that
it inserts its RCSID into *every* object files. However, it can be still
useful even if heavily duplicated.

Stop using __KERNEL_RCSID() in header files; it confuses ident(1) by
overwriting RCSID in main source files.

XXX
The first argument of __KERNEL_RCSID() is neglected for ELF. If we wish
to have RCSID of header files in kernel binary, we need something like
__FBSDID() macro in FreeBSD.

branches: 1.10.6;
Add IPI_AST.

branches: 1.9.2;
s/static inline/static __inline/g for consistency.

branches: 1.8.16;
ddb MP support

branches: 1.7.4;
Implement MI IPI interface with cross-call support.

branches: 1.6.12; 1.6.26;
Don't declare cpu_send_ipi if BOOKE

Remove <machine/atomic.h>; use <sys/atomic.h> instead.
Add <powerpc/cpuset.h> (for mpc85xx pmap).
Add some initial MP code for mpc85xx
Rework ipi code to be common across all ppcs
Change PPC to keep curlwp in %r13 while in the kernel.
Move astpending from cpu_info to mdlwp
Improve cpu_need_resched to be more MP friendly.

branches: 1.4.2; 1.4.6;
Implement high priority (XC_HIGHPRI) xcall(9) mechanism - a facility
to execute functions from software interrupt context, at SOFTINT_CLOCK.
Functions must be lightweight. Will be used for passive serialization.

OK ad@.

branches: 1.3.20; 1.3.22;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8; 1.2.12; 1.2.26; 1.2.28; 1.2.30;
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: 1.1.2;
file ipivar.h was initially added on branch ppcoea-renovation.

Drop unused opt_interrupt.h.

Style and cosmetic changes. No binary changes intended.

use ci_index.

branches: 1.6.6; 1.6.10;
Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

branches: 1.5.2; 1.5.6;
<arch/powerpc/... -> <powerpc/...

Remove <machine/atomic.h>; use <sys/atomic.h> instead.
Add <powerpc/cpuset.h> (for mpc85xx pmap).
Add some initial MP code for mpc85xx
Rework ipi code to be common across all ppcs
Change PPC to keep curlwp in %r13 while in the kernel.
Move astpending from cpu_info to mdlwp
Improve cpu_need_resched to be more MP friendly.

branches: 1.3.22; 1.3.28; 1.3.32;
Convert to new 2 clause license

branches: 1.2.2; 1.2.4;
SMP support for ofppc. (finally) Much thanks to Matt Thomas for help in
figuring out all the crazy nuances of getting this working, and to
Michael Lorenz for testing/fixing my changes on macppc. Tested with a
quad-proc 7044-270.
Summary of changes:

Bumped CPU_MAXNUM to 16 on ofppc.
Added md_* routines to ofppc/cpu.c, to sync the timebase, and awaken the CPUs.
Fixed a bug in the test for a 64bit bridge cpu early in locore.S
Added code to set the interrupt priority for all CPUs with an openpic.
Change rtas to probe before cpus, to allow use of the rtas freeze/thaw
timebase code routines.
Fix CPU_INFO_FOREACH macro to iterate through detected cpus, not CPU_MAXNUM.
Change most uses of ci_cpuid to ci_index, to deal with CPUs that do not allow
writing to SPR_PIR. Don't write SPR_PIR unless the secondary cpu identifies
itself as 0.
Change the hatchstack/interrupt stack allocations to allocate a 8192byte
interrupt stack, and a 4096 byte hatch stack, align them to 16 bytes, and
allocate them no lower than 0x10000. Allocate them separately to prevent the
hatch stack corrupting the interrupt stack later on.
If the CPU is a 64bit cpu, copy SPR_ASR in cpu_hatch()
Set the idle stack to ci->ci_data.cpu_idlelwp->l_addr->u_pcb.pcb_sp.
Add OF_start_cpu(). Add a routine to ofwoea_initppc to spin up secondary
procs early, and place them into a spinloop waiting for the hatch routines
to be ready.
Modify the ipi routines to deal with openpics that reverse byte order on read
from an ipi register. (such as on the 7044)
Change the rtas setup to allocate the rtas physical base address above
the kernel, to avoid mucking up the hatch/interrupt stacks.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.12; 1.1.14;
Add support to ofppc for the IBM 7044-270 machine. This is a POWER3-II
based machine. Currently the kernel to run on this machine is
incompatible with the standard GENERIC kernel, so for now, we have a
separate GENERIC_B64. Eventually, I hope to combine the two.

Please note, this is a port of 32bit ofppc, not a powerpc64 port.

Thanks to Matt Thomas and Kevin Bowling for helping to make this port
possible.

Summary of changes:

Change ofwpci to use the ofmethod config for configuring the PCI bus,
rather than indirect configuration.
Move the wiring of the interrupt controllers from at the start of the
boot, into the configuration of the first PCI bus.
Rewrite the map_isa_ioregs() hack to work on a machine without BATs
Fix a ton of bugs in the genofw_find_pics routine, and in the map_space code.
Split the pic_openpic into openpic_common and pic_openpic.
Create a new pic_distopenpic driver, for the distributed openpic found on
some newer IBM machines.
Fix a bad panic in pmap_extract on 64bit bridge mode

fix various typos in comments, mainly immediatly/immediately/,
as well shared and recently fixed typos in OpenBSD code by Jonathan Grey.

Drop unused opt_interrupt.h.

Style and cosmetic changes. No binary changes intended.

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)

branches: 1.10.8; 1.10.10;
remove checks for failure after memory allocation calls that cannot fail:

kmem_alloc() with KM_SLEEP
kmem_zalloc() with KM_SLEEP
percpu_alloc()
pserialize_create()
psref_class_create()

all of these paths include an assertion that the allocation has not failed,
so callers should not assert that again.

branches: 1.9.6; 1.9.24;
Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

Some PICs have the capability to define the interrupt's polarity (OpenPIC
for example). So the accepted interrupt types have been extended to:
- IST_EDGE_FALLING (which is the same as IST_EDGE)
- IST_EDGE_RISING (new)
- IST_LEVEL_LOW (is the same as IST_LEVEL)
- IST_LEVEL_HIGH (new)
Old code will continue to work without modification.

branches: 1.7.2; 1.7.6;
avoid some uninitialised variable warnings from GCC 4.5. i'm pretty
sure they can't happen in practise, but i can see why GCC isn't sure.

<arch/powerpc/... -> <powerpc/...

Remove <machine/atomic.h>; use <sys/atomic.h> instead.
Add <powerpc/cpuset.h> (for mpc85xx pmap).
Add some initial MP code for mpc85xx
Rework ipi code to be common across all ppcs
Change PPC to keep curlwp in %r13 while in the kernel.
Move astpending from cpu_info to mdlwp
Improve cpu_need_resched to be more MP friendly.

branches: 1.4.20; 1.4.26; 1.4.30;
Backout previous: the license sweep touched these files in error, so
restore the old license.

branches: 1.3.2;
Convert to new 2 clause license

SMP support for ofppc. (finally) Much thanks to Matt Thomas for help in
figuring out all the crazy nuances of getting this working, and to
Michael Lorenz for testing/fixing my changes on macppc. Tested with a
quad-proc 7044-270.
Summary of changes:

Bumped CPU_MAXNUM to 16 on ofppc.
Added md_* routines to ofppc/cpu.c, to sync the timebase, and awaken the CPUs.
Fixed a bug in the test for a 64bit bridge cpu early in locore.S
Added code to set the interrupt priority for all CPUs with an openpic.
Change rtas to probe before cpus, to allow use of the rtas freeze/thaw
timebase code routines.
Fix CPU_INFO_FOREACH macro to iterate through detected cpus, not CPU_MAXNUM.
Change most uses of ci_cpuid to ci_index, to deal with CPUs that do not allow
writing to SPR_PIR. Don't write SPR_PIR unless the secondary cpu identifies
itself as 0.
Change the hatchstack/interrupt stack allocations to allocate a 8192byte
interrupt stack, and a 4096 byte hatch stack, align them to 16 bytes, and
allocate them no lower than 0x10000. Allocate them separately to prevent the
hatch stack corrupting the interrupt stack later on.
If the CPU is a 64bit cpu, copy SPR_ASR in cpu_hatch()
Set the idle stack to ci->ci_data.cpu_idlelwp->l_addr->u_pcb.pcb_sp.
Add OF_start_cpu(). Add a routine to ofwoea_initppc to spin up secondary
procs early, and place them into a spinloop waiting for the hatch routines
to be ready.
Modify the ipi routines to deal with openpics that reverse byte order on read
from an ipi register. (such as on the 7044)
Change the rtas setup to allocate the rtas physical base address above
the kernel, to avoid mucking up the hatch/interrupt stacks.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.12; 1.1.14;
Add support to ofppc for the IBM 7044-270 machine. This is a POWER3-II
based machine. Currently the kernel to run on this machine is
incompatible with the standard GENERIC kernel, so for now, we have a
separate GENERIC_B64. Eventually, I hope to combine the two.

Please note, this is a port of 32bit ofppc, not a powerpc64 port.

Thanks to Matt Thomas and Kevin Bowling for helping to make this port
possible.

Summary of changes:

Change ofwpci to use the ofmethod config for configuring the PCI bus,
rather than indirect configuration.
Move the wiring of the interrupt controllers from at the start of the
boot, into the configuration of the first PCI bus.
Rewrite the map_isa_ioregs() hack to work on a machine without BATs
Fix a ton of bugs in the genofw_find_pics routine, and in the map_space code.
Split the pic_openpic into openpic_common and pic_openpic.
Create a new pic_distopenpic driver, for the distributed openpic found on
some newer IBM machines.
Fix a bad panic in pmap_extract on 64bit bridge mode

remove checks for failure after memory allocation calls that cannot fail:

kmem_alloc() with KM_SLEEP
kmem_zalloc() with KM_SLEEP
percpu_alloc()
pserialize_create()
psref_class_create()

all of these paths include an assertion that the allocation has not failed,
so callers should not assert that again.

branches: 1.6.6; 1.6.24;
Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

branches: 1.5.2; 1.5.6;
<arch/powerpc/... -> <powerpc/...

Use <sys/foo.h> instead of <machine/foo.h> if such a file exists.
Don't assume <sys/cpu.h> includes <powerpc/subarch/cpu*.h>. Include it
explicitly.

branches: 1.3.32;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.2; 1.2.4; 1.2.8; 1.2.22; 1.2.24; 1.2.26;
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: 1.1.2; 1.1.6; 1.1.8;
file pic_i8259.c was initially added on branch ppcoea-renovation.

fix various typos in comments, mainly immediatly/immediately/,
as well shared and recently fixed typos in OpenBSD code by Jonathan Grey.

Style and cosmetic changes. No binary changes intended.

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)

branches: 1.6.8; 1.6.10;
remove checks for failure after memory allocation calls that cannot fail:

kmem_alloc() with KM_SLEEP
kmem_zalloc() with KM_SLEEP
percpu_alloc()
pserialize_create()
psref_class_create()

all of these paths include an assertion that the allocation has not failed,
so callers should not assert that again.

branches: 1.5.6; 1.5.24;
Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

Use C89 function prototypes.

Some PICs have the capability to define the interrupt's polarity (OpenPIC
for example). So the accepted interrupt types have been extended to:
- IST_EDGE_FALLING (which is the same as IST_EDGE)
- IST_EDGE_RISING (new)
- IST_LEVEL_LOW (is the same as IST_LEVEL)
- IST_LEVEL_HIGH (new)
Old code will continue to work without modification.

branches: 1.2.2; 1.2.6;
<arch/powerpc/... -> <powerpc/...

branches: 1.1.2; 1.1.12;
- Have pic_mpcsoc.c to adapt variations of Moto/Freescale OpenPIC
compliant interrupt controllers. Mostly the refrain of pic_openpic.c
and shall be useful for 85xx/86xx/QorIQ and Tundra product lines.

fix various typos in comments, mainly immediatly/immediately/,
as well shared and recently fixed typos in OpenBSD code by Jonathan Grey.

Drop unused opt_interrupt.h include.

No need to test _KERNEL_OPT twice.
No binary changes.

Include missing opt_multiprocessor.h.

Style and cosmetic changes. No binary changes intended.

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)

branches: 1.14.2;
special case IPIs so we don't mess with hardware IRQ sources
now SMP works on my PCI-X G5

don't call mapiodev() - the caller should hand us a usable address

branches: 1.12.2;
IRQ0 is perfectly legal to use on at least some macppc, so don't treat it
as an error or something special
with this svwsata works on my PCI-X G5

use mapiodev() so this can work on G5s

remove checks for failure after memory allocation calls that cannot fail:

kmem_alloc() with KM_SLEEP
kmem_zalloc() with KM_SLEEP
percpu_alloc()
pserialize_create()
psref_class_create()

all of these paths include an assertion that the allocation has not failed,
so callers should not assert that again.

treat IPIs like regular interrupts at IPL_HIGH
should fix port-powerpc/44387
tested by chuq

branches: 1.8.6; 1.8.24;
Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

Some PICs have the capability to define the interrupt's polarity (OpenPIC
for example). So the accepted interrupt types have been extended to:
- IST_EDGE_FALLING (which is the same as IST_EDGE)
- IST_EDGE_RISING (new)
- IST_LEVEL_LOW (is the same as IST_LEVEL)
- IST_LEVEL_HIGH (new)
Old code will continue to work without modification.

branches: 1.6.2; 1.6.6;
<arch/powerpc/... -> <powerpc/...

branches: 1.5.32;
Convert to new 2 clause license

branches: 1.4.6; 1.4.8; 1.4.10;
Add support to ofppc for the IBM 7044-270 machine. This is a POWER3-II
based machine. Currently the kernel to run on this machine is
incompatible with the standard GENERIC kernel, so for now, we have a
separate GENERIC_B64. Eventually, I hope to combine the two.

Please note, this is a port of 32bit ofppc, not a powerpc64 port.

Thanks to Matt Thomas and Kevin Bowling for helping to make this port
possible.

Summary of changes:

Change ofwpci to use the ofmethod config for configuring the PCI bus,
rather than indirect configuration.
Move the wiring of the interrupt controllers from at the start of the
boot, into the configuration of the first PCI bus.
Rewrite the map_isa_ioregs() hack to work on a machine without BATs
Fix a ton of bugs in the genofw_find_pics routine, and in the map_space code.
Split the pic_openpic into openpic_common and pic_openpic.
Create a new pic_distopenpic driver, for the distributed openpic found on
some newer IBM machines.
Fix a bad panic in pmap_extract on 64bit bridge mode

Fix the endless stream of 7's problem on i8259-like interrupt controllers
once and for all. The i8259 does not like to be read in a loop, when an
interrupt comes in, it will return a valid value, however, if you keep
reading it until there are no outstanding interrupts, it will return 7
(which is the lpt interrupt). Change the pic handler to give an argument
to the get_irq functions of mode, which indicates if this is the first
time we are asking, or if we are just rechecking in a loop. Non-i8259
handlers can safely ignore this argument.

Tested to fix the stream of 7's problem on prep and ofppc. Got rid of
the nasty hack in ofppc with this too, and the prep machine seems to take
less interrupts now, which is a good thing.

branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8; 1.2.10; 1.2.12; 1.2.14;
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: 1.1.2; 1.1.6; 1.1.8;
file pic_openpic.c was initially added on branch ppcoea-renovation.

remove checks for failure after memory allocation calls that cannot fail:

kmem_alloc() with KM_SLEEP
kmem_zalloc() with KM_SLEEP
percpu_alloc()
pserialize_create()
psref_class_create()

all of these paths include an assertion that the allocation has not failed,
so callers should not assert that again.

branches: 1.8.2; 1.8.16;
Fix -fno-common fallout.

Use kmem instead of malloc. Remove unneeded <sys/malloc.h> includes.

branches: 1.6.2; 1.6.6;
<arch/powerpc/... -> <powerpc/...

Use <sys/foo.h> instead of <machine/foo.h> if such a file exists.
Don't assume <sys/cpu.h> includes <powerpc/subarch/cpu*.h>. Include it
explicitly.

branches: 1.4.32;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.8; 1.3.10; 1.3.12;
Fix the endless stream of 7's problem on i8259-like interrupt controllers
once and for all. The i8259 does not like to be read in a loop, when an
interrupt comes in, it will return a valid value, however, if you keep
reading it until there are no outstanding interrupts, it will return 7
(which is the lpt interrupt). Change the pic handler to give an argument
to the get_irq functions of mode, which indicates if this is the first
time we are asking, or if we are just rechecking in a loop. Non-i8259
handlers can safely ignore this argument.

Tested to fix the stream of 7's problem on prep and ofppc. Got rid of
the nasty hack in ofppc with this too, and the prep machine seems to take
less interrupts now, which is a good thing.

branches: 1.2.2; 1.2.4; 1.2.8; 1.2.10; 1.2.12; 1.2.14;
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: 1.1.2; 1.1.6; 1.1.8;
file pic_prepivr.c was initially added on branch ppcoea-renovation.

Use <sys/foo.h> instead of <machine/foo.h> if such a file exists.
Don't assume <sys/cpu.h> includes <powerpc/subarch/cpu*.h>. Include it
explicitly.

branches: 1.4.30;
Backout previous: the license sweep touched these files in error, so
restore the old license.

branches: 1.3.2;
Convert to new 2 clause license

branches: 1.2.2; 1.2.4; 1.2.8;
Merge the ppcoea-renovation branch to HEAD.

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

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

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

branches: 1.1.2; 1.1.6; 1.1.8;
file pic_soft.c was initially added on branch ppcoea-renovation.

intr.h must not include cpu due to deadly embrace with SOFTINT_COUNT.
Cleanup intr.h so MD definitions can overload common definitions.
Rototill pic/intr.c. Virtual IRQs can now be reclaimed. separate virq
from hwirq from picirq. Redo intr mask calculations.
tested on pmppc and macppc (MP).

enable FAST_SOFTINTR support for all ports that use powerpc/pic/
This has been successfully tested on macppc
TODO:
- ibm4xx needs to be adapted
- SMP doesn't work yet, 2nd CPU crashes when trying to leave the idle loop

add a function to find a PIC by its base address

powerpc: Don't enable interrupts before calling cascaded intr handler.

Before calling a normal interrupt handler, the pic code adjusts cpl and
enables interrupts. Don't do this with interrupt sources that feed
cascaded pics as the resulting handler will do it anyway, and it can
result in multiple interrupts firing on the parent pic just to service
a single interrupt on the child.

branches: 1.13.16; 1.13.22;
Brush up previous, or make things more similar to x86:

- Prevent pic_name from appearing vmstat(1) twice.
- Restore "irq" in interrupt id fields of intrctl(8).

For these purposes,

- Add is_evname member to struct intr_source.
- Bump size of is_source to INTRIDBUF, and rename it to is_intrid for clarity.

Now, outputs from vmstat(1) and intrctl(8) are like:

----
$ vmstat -ev
...
openpic irq 39 3967 26 intr
...
$ intrctl list
interrupt id CPU0 device name(s)
...
openpic irq 39 3967* wdc1
...
----

branches: 1.12.2; 1.12.4;
Revert previous for now:
http://mail-index.netbsd.org/source-changes/2020/04/16/msg116278.html

The reasoning turned out to be wrong; __KERNEL_RCSID() in header files
does *not* overwrite RCSID in main source files. The real problem is that
it inserts its RCSID into *every* object files. However, it can be still
useful even if heavily duplicated.

Stop using __KERNEL_RCSID() in header files; it confuses ident(1) by
overwriting RCSID in main source files.

XXX
The first argument of __KERNEL_RCSID() is neglected for ELF. If we wish
to have RCSID of header files in kernel binary, we need something like
__FBSDID() macro in FreeBSD.

branches: 1.10.12;
use 128 as IPI_VECTOR to avoid overlap wth hardware interrupts

branches: 1.9.52;
Use <sys/foo.h> instead of <machine/foo.h> if such a file exists.
Don't assume <sys/cpu.h> includes <powerpc/subarch/cpu*.h>. Include it
explicitly.

Change from level to ipl since we aren't dealing a mask anymore, just a
simple value.
Fix intr_calculatemasks to deal with ipl isn't a mask. Let establish
and disestablish determine the highest ipl for the interrut source being
modified. No reason to recompute that for every source when only one changes
at a time. Only change idepth while in the loop.

branches: 1.7.6;
Support 64-bit imask for powerpc/pic.

branches: 1.6.2; 1.6.4;
- Have pic_mpcsoc.c to adapt variations of Moto/Freescale OpenPIC
compliant interrupt controllers. Mostly the refrain of pic_openpic.c
and shall be useful for 85xx/86xx/QorIQ and Tundra product lines.

Convert to new 2 clause license

branches: 1.4.6; 1.4.8; 1.4.10;
Add support to ofppc for the IBM 7044-270 machine. This is a POWER3-II
based machine. Currently the kernel to run on this machine is
incompatible with the standard GENERIC kernel, so for now, we have a
separate GENERIC_B64. Eventually, I hope to combine the two.

Please note, this is a port of 32bit ofppc, not a powerpc64 port.

Thanks to Matt Thomas and Kevin Bowling for helping to make this port
possible.

Summary of changes:

Change ofwpci to use the ofmethod config for configuring the PCI bus,
rather than indirect configuration.
Move the wiring of the interrupt controllers from at the start of the
boot, into the configuration of the first PCI bus.
Rewrite the map_isa_ioregs() hack to work on a machine without BATs
Fix a ton of bugs in the genofw_find_pics routine, and in the map_space code.
Split the pic_openpic into openpic_common and pic_openpic.
Create a new pic_distopenpic driver, for the distributed openpic found on
some newer IBM machines.
Fix a bad panic in pmap_extract on 64bit bridge mode

Fix the endless stream of 7's problem on i8259-like interrupt controllers
once and for all. The i8259 does not like to be read in a loop, when an
interrupt comes in, it will return a valid value, however, if you keep
reading it until there are no outstanding interrupts, it will return 7
(which is the lpt interrupt). Change the pic handler to give an argument
to the get_irq functions of mode, which indicates if this is the first
time we are asking, or if we are just rechecking in a loop. Non-i8259
handlers can safely ignore this argument.

Tested to fix the stream of 7's problem on prep and ofppc. Got rid of
the nasty hack in ofppc with this too, and the prep machine seems to take
less interrupts now, which is a good thing.

branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8; 1.2.10; 1.2.12; 1.2.14;
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: 1.1.2; 1.1.6; 1.1.8;
file picvar.h was initially added on branch ppcoea-renovation.