CVS log for src/sys/arch/evbppc/explora/machdep.c

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Default branch: MAIN

Switch evbppc/ibm4xx to generic evbppc (same as oea) kernel modules.

I've confirmed that kernels similar to amd64/conf/MODULAR work fine
both on 403 and 405.

XXX
Unfortunately, we cannot immediately switch evbppc/booke to generic
kernel modules yet; it has its own intr.h implementation.

Sync with HEAD.

Sync with HEAD.

Sort headers. Fix style. No binary changes.

G/C misleading <evbppc/tlb.h>. Use <powerpc/ibm4xx/tlb.h> directly.

G/C unused. No binary changes (except for __LINE__ for KASSERT).

Move common global variables, i.e., phys_map, machine, and machine_arch to
evbppc/evbppc_machdep.c (bad naming; used only for 4xx boards).

Centralize cpu_reboot().

Revert this commit:

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

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

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

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

Identify oneself as ``Explora 450'' instead of 451.

There are models numbered 450 to 454. The differences b/w them are
shapes of ethernet and audio connectors. Base model number 450 is
displayed for (probably) all models by firmware.

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

Call bus_space_mallocok() appropriately.

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

No functional changes intended.

Establish kernel MMU context before turning on MMU.

uvm_availmem(): give it a boolean argument to specify whether a recent
cached value will do, or if the very latest total must be fetched.  It can
be called thousands of times a second and fetching the totals impacts not
only the calling LWP but other CPUs doing unrelated activity in the VM
system.

Merge changes from current as of 20200406

Rename uvm_free() -> uvm_availmem().

uvmexp.free -> uvm_free()

sync with head

Fix some -fno-common fallout

Catchup with rmind-uvmplock merge.

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

split device/softc (CFATTACH_DECL_NEW)
struct device * -> device_t
struct cfdata * -> cfdata_t
Use <sys/foo.h> instead of <machine/foo.h> if <sys/foo.h> exists
Explicitly include <powerpc/ibm4xx/cpu.h> when needed.

lcsplx is dead.  remove last vestiges of it.

for booke and ibm4xx evbppc systems, set module_machine to to either
"powerpc-ibm4xx" or "powerpc-booke".

sync with head

Retire struct user, remove sys/user.h inclusions.  Note sys/user.h header
as obsolete.  Remove USER_TO_UAREA/UAREA_TO_USER macros.

Various #include fixes and review by matt@.

Deal with the splitting of <spr.h>

Sync with HEAD.

sync with head

Adapt to <spr.h> breakup.

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.

- 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.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

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.

Sync with HEAD.

Sync with HEAD.

Update haad-dm branch to haad-dm-base2.

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.

Sync with HEAD.

Sync with HEAD.

Sync with wrstuden-revivesa-base-2.

Remove an unneeded include to make it compile again.

Sync with head.

Sync with HEAD.

Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

sync with HEAD

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.

Sync with HEAD

sync with head.

Sync with HEAD.

Sync with HEAD.

Sync with HEAD.

Move intr_init() from cpu_configure() to cpu_startup() so softintrs
pool_get() works again.

Sync with HEAD.

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

- sync with head.
- move sched_changepri back to kern_synch.c as it doesn't know PPQ anymore.

sync with head.

TRUE -> true, FALSE -> false

Sync with head.

sync with head.

sync with head.

Instead of mapping whole RAM with reserved TLB entries, map just enough
to ensure trap code will work (that is 0 upto ${endkernel}) and leave the
rest to pmap_tlbmiss(). Mapping whole physmem into the kernel wired way
too many TLB entries, see

  http://mail-index.netbsd.org/port-powerpc/2006/10/27/0000.html

for performance analysis. While there, be a bit more descriptive in
pmap_tlbmiss() comment and use macro instead of numeric constant.

OK by Simon Burge

Sync with head.

Define BASE_ISA macro for ISA window base address (where pckbc, com, lpt live)
instead of hardcoding the constant or (even before) using BASE_COM.

sync with head

* convert ibm4xx-based evbppc from reserved-TLB entry allocation to recently
  introduced ppc4xx_tlb_reserve() API.
* ibm405gp UART0 used to be linear mapped. The VA happens to be inside kernel
  segment, giving us the possibility of multiple VA matches in the TLB. This
  is considered "programming error" by 405 core and results in "undefined
  behaviour". We now avoid mapping peripherals in kernel segment.
* Some boards used to map hardwired RAM size. We now use the real size as
  passed in by boot firmware.
* TLB_NRESERVED is (finally) gone.

Conversion of evbppc to generic TODR.  ok freza@

sync with head

sync with head

Merge from HEAD.

Bring ibm4xx interrupt code up to date:

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

Convert all affected evbppc platforms.

OK by simonb@, some points discussed with matt@

sync with head.

Sync with head.

Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.

sync with head.

sync with head

Remove the devprop API and switch everthing over to the new proplib.  Add
a new device_properties() accessor for device_t that returns the device's
property dictionary.

sync with head.

Use our own function to copy traps.  We cannot use memcpy() anymore
because the destination may be zero.

bare asm -> __asm

merge ktrace-lwp.

Sync with HEAD. Here we go again...

sync with -current

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.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Mapping of console device goes into the reserved tlb's.
Max. memory is 32M for console at fb and 48M for console on com.

If this becomes a problem TLB_NRESERVED needs to become variable.

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.

Nuke ci_curpm and curpm.  Nuke pcb_pmreal.  Those were use for spill stacks
and those no longer exist.  for few uses that need CURPM, use CURPCB/PCB_PM

__KERNEL_RCSID()

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

Add a port to the NCD Explora451 ThinClient.

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

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