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Commit Graph

227 Commits

Author SHA1 Message Date
Sam Ravnborg
29af0ebaa2 sparc32: use the common implementation of alloc_thread_info_node()
With sun4c removed we can fall-back to the common implementation.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-22 12:02:56 -07:00
Linus Torvalds
9daeaa3705 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next
Pull sparc updates from David Miller:

1) Kill off support for sun4c and Cypress sun4m chips.

   And as a result we were able to also kill off that ugly btfixup thing
   that required multi-stage links of the final vmlinux image in the
   Kbuild system.  This should make the kbuild maintainers really happy.

   Thanks a lot to Sam Ravnborg for his tireless efforts to get this
   going.

2) Convert sparc64 to nobootmem.  I suspect now with sparc32 being a lot
   cleaner, it should be able to fall in line and modernize in this area
   too.

3) Make sparc32 use generic clockevents, from Tkhai Kirill.

[ I fixed up the BPF rules, and tried to clean up the build rules too.
  But I don't have - or want - a sparc cross-build environment, so the
  BPF rule bug and the related build cleanup was all done with just a
  bare "make -n" pseudo-test.      - Linus ]

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next: (110 commits)
  sparc32: use flushi when run-time patching in per_cpu_patch
  sparc32: fix cpuid_patch run-time patching
  sparc32: drop unused inline functions in srmmu.c
  sparc32: drop unused functions in pgtsrmmu.h
  sparc32,leon: move leon mmu functions to leon_mm.c
  sparc32,leon: remove duplicate definitions in leon.h
  sparc32,leon: remove duplicate UART register definitions
  sparc32,leon: move leon ASI definitions to asi.h
  sparc32: move trap table to a separate file
  sparc64: renamed ttable.S to ttable_64.S
  sparc32: Remove asm/sysen.h header.
  sparc32: Delete asm/smpprim.h
  sparc32: Remove unused empty_bad_page{,_table} declarations.
  sparc32: Kill boot_cpu_id4
  sparc32: Move GET_PROCESSOR*_ID() out of asm/asmmacro.h
  sparc32: Remove completely unused code from asm/cache.h
  sparc32: Add ucmpdi2.o to obj-y instead of lib-y.
  sparc32: add ucmpdi2
  sparc: introduce arch/sparc/Kbuild
  sparc: remove obsolete documentation
  ...
2012-05-21 10:32:01 -07:00
Sam Ravnborg
8578149904 sparc32: drop unused inline functions in srmmu.c
When decelared inline the compiler does not warn
about unused functions.
But they are not used so drop them.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 23:27:40 -07:00
Sam Ravnborg
3d5f7d37c8 sparc32: drop unused functions in pgtsrmmu.h
One function was only used by leon - move it to a leon specific file.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 23:27:39 -07:00
Sam Ravnborg
accf032cfa sparc32,leon: move leon mmu functions to leon_mm.c
We already have a leaon specific file - so
keep all the laon stuff in one place.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Konrad Eisele <konrad@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 23:27:38 -07:00
Sam Ravnborg
70168dfa1c sparc32: cleanup mm/fault_32.c
- remove unused variables
- fix coding style issues that hurts my eyes

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-15 10:43:48 -07:00
David S. Miller
c7020eb466 sparc32: Remove cypress cpu support.
It's the one aberration in v8, the only cpu that
didn't actually have hardware multiply and divide
instructions.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
2012-05-15 10:22:00 -07:00
Sam Ravnborg
50544bce4c sparc32: remove runtime btfix support
- remove all uses of btfixup header
- remove the btfixup header
- remove the btfixup code

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-14 14:05:09 -07:00
David S. Miller
5d83d66635 sparc32: Move cache and TLB flushes over to method ops.
This eliminated most of the remaining users of btfixup.

There are some complications because of the special cases we
have for sun4d, leon, and some flavors of viking.

It was found that there are no cases where a flush_page_for_dma
method was not hooked up to something, so the "noflush" iommu
methods were removed.

Add some documentation to the viking_sun4d_smp_ops to describe exactly
the hardware bug which causes us to need special TLB flushing on
sun4d.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 20:49:31 -07:00
David S. Miller
b25e74b1be sparc32: Remove unused declarations in srmmu.c
Uses of these went away with the sun4c removal.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 15:27:09 -07:00
David S. Miller
d894d964ff sparc32: Convert mmu_* interfaces from btfixup to method ops.
This set of changes displays one major danger of btfixup, interface
signatures are not always type checked fully.  As seen here the iounit
variant of the map_dma_area routine had an incorrect type for one of
it's arguments.

It turns out to be harmless in this case, but just imagine trying to
debug something involving this kind of problem.  No thanks.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 13:57:05 -07:00
David S. Miller
679bea5e43 sparc: Kill mmu_{un,}lockarea().
These were used on sun4c during floppy data transfers since on that
chip we had to lock the cpu mappings into the TLB because we cannot
take a TLB miss during the assembler floppy interrupt handler that
does the data transfer.

That is no longer necessary since we've removed sun4c support, thus
this stuff can disappear completely.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 13:23:16 -07:00
David S. Miller
f613914efc sparc32: Un-btfixup update_mmu_cache().
The magic Swift SRMMU code in question has not been enabled for
something on the order of a decade, and it as well as it's comment
is there in the history in case we ever need it again.

Therefore all implementations are NOPs and we can kill this stuff
off.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 13:16:39 -07:00
David S. Miller
73c1377da9 sparc32: Kill btfixup for xchg()'s 'swap' instruction.
We always have this instruction available, so no need to use
btfixup for it any more.

This also eradicates the whole of atomic_32.S and thus the
__atomic_begin and __atomic_end symbols completely.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 13:07:16 -07:00
Sam Ravnborg
fb6f66f405 sparc32: drop btfixup in page_32.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:55 -07:00
Sam Ravnborg
b796c6da51 sparc32: drop btfixup in mmu_context_32.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:53 -07:00
Sam Ravnborg
9701b264d3 sparc32: drop btfixup in pgtable_32.h
Only one function left using btfixup.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:53 -07:00
Sam Ravnborg
642ea3ed9c sparc32: drop btfixup in pgalloc_32.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:52 -07:00
David S. Miller
301d5bbb52 sparc32: Un-btfixup more PTE constants and PTE ops.
pte_{filei,wrprotecti,mkcleani,mkoldi}
pte_{mkwrite,mkdirty,mkyoung}

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:54:58 -07:00
David S. Miller
f755f77a3a sparc32: Un-btfixup pte_{write,dirty,young}i
And we can certainly get rid of the const function attributes, there
is no way that's needed any longer and no other arch uses this kind
of annotation here.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:48:10 -07:00
David S. Miller
62875cff73 sparc32: Un-btfixup set_pte, pte_present, mk_pte{_phys,_io}().
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:39:23 -07:00
Sam Ravnborg
a3c5c6637b sparc32: drop loadmmu
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:30:49 -07:00
David S. Miller
f167edaee0 sparc32: Un-btfixup pmd_{bad,present}().
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:30:28 -07:00
David S. Miller
7d9fa4aa3d sparc32: Un-btfixup pgd_{none,bad,present}.
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:13:16 -07:00
David S. Miller
6439d1c693 sparc32: Un-btfixup PAGE_{NONE,COPY,READONLY,SHARED,KERNEL}.
That lets us also get rid of the run-time initialization of
protection_map[] and all the ugly module workarounds for
PAGE_KERNEL and PAGE_SHARED to deal with the fact that we
can't do btfixups for modular code.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 12:52:47 -07:00
David S. Miller
3d8273675d sparc32: Un-btfixup pmd_page and pte_pfn.
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 12:33:08 -07:00
David S. Miller
a46d6056f6 sparc32: Un-btfixup {pte,pmd,pgd}_clear().
Also we can remove BTFIXUPCALL_SWAPO0G0 as that is no longer
used.

This was rather amusing, we were setting the btfixup vectors
based upon cpu type but all to the same exact generic srmmu
routines.

Furthermore, we were inconsistently marking the fixup as
either BTFIXUPCALL_SWAPO0G0 or BTFIXUPCALL_NORM.

What a mess, glad we could untangle this stuff.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 12:26:47 -07:00
David S. Miller
3d386c0ef6 sparc32: Un-btfixup PGDIR_{SHIFT,SIZE,MASK} {USER_,}PTRS_PER_{PGD,PMD}
Only one set of values exist, the SRMMU ones.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 12:02:02 -07:00
Sam Ravnborg
3774348770 sparc32: drop btfixup for check_pgt_cache
It is a noop for srmmu - so use a define as sparc64 does.
And drop all sparc callers - no need to confuse our-self
be calling a noop function.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 11:32:04 -07:00
Sam Ravnborg
34d4accfe0 sparc32: drop btfixup for switch_mm
This revealed that the implementation of switch_mm
had a bogus extra argument.
No harm as said argument was never used - but confusing.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 11:32:03 -07:00
David S. Miller
ee906c9e0b sparc32: Trivial removal of sun4c references in comments.
I left some around, like the ones in the openprom headers, since
we need to think about which pieces of those datastructures and
code we can completely toss now.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 00:35:45 -07:00
David S. Miller
c1e3cb54f2 sparc32: Remove sparc_lvl15_nmi().
No longer used.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 21:27:04 -07:00
David S. Miller
716a5d73a7 sparc32: Kill asm/vac-ops.h
All sun4/sun4c stuff and unused.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 21:07:50 -07:00
Sam Ravnborg
afaedde7c9 sparc32: use inline versions of pgprot_noncached, pte_to_pgoff and pgoff_to_pte
We no longer have different versions of these so use a few simple
static inline functions.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:29:10 -07:00
Sam Ravnborg
e7b7e0c356 sparc32: drop btfixup for alloc_thread_info_node/free_thread_info
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:29:09 -07:00
Sam Ravnborg
ef136bc91e sparc32: drop sun4c user stack checking routine
With this we no longer do any run-time patchings of traps.
So drop the function + macro to support this.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:27:52 -07:00
Sam Ravnborg
e098ff92f6 sparc32: drop sun4c stack checking routine
And drop run-time patching too.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:27:51 -07:00
Sam Ravnborg
054768a132 sparc32: drop sun4c window overflow stack checking routine
Also drop run-time patching for srmmu

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:27:50 -07:00
Sam Ravnborg
28de2f7339 sparc32: drop sun4c specific stack validation
This allows us to kill run-time patching for this function too

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:27:50 -07:00
Sam Ravnborg
582a0baee5 sparc32: remove all uses of ARCH_SUN4C
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:27:48 -07:00
Sam Ravnborg
306f123162 sparc32: remove sun4c traps
We used to runtime patch the trap table for srmmu.
With the removal of sun4c support this is no longer required.

With the sun4c trap removed we can remove all the referenced
trap handling which is sun4c specific.
This also allows us to get rid of the nosun4c.c file that
contained only dummy functions/data.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:27:46 -07:00
Sam Ravnborg
e7eaf5b8ab sparc32: remove calls to sun4c dummy mm inits functions
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:27:45 -07:00
Sam Ravnborg
2c1cfb2db6 sparc32: drop sun4c support
Machines with sun4c support are very rare these days, and noone
is using them for any practical purposes.
The sun4c support has been know broken for quite some time too.

So rather than trying to keep it up-to-date, lets get rid of it.
This allows us to do some very welcome cleanup of sparc32 support.

Updated the former sun4c specifc nmi (which was also used
for sun4m UP) to be a generic UP NMI.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 19:27:44 -07:00
David S. Miller
a5a737e090 sparc64: Do not clobber %g2 in xcall_fetch_glob_regs().
%g2 is meant to hold the CPUID number throughout this routine, since
at the very beginning, and at the very end, we use %g2 to calculate
indexes into per-cpu arrays.

However we erroneously clobber it in order to hold the %cwp register
value mid-stream.

Fix this code to use %g3 for the %cwp read and related calulcations
instead.

Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-10 11:00:46 -07:00
Paul Gortmaker
aa6f079075 sparc: fix build fail in mm/init_64.c when NEED_MULTIPLE_NODES is off
Commit 625d693e97 (linux-next)

    "sparc64: Convert over to NO_BOOTMEM."

causes the following compile failure for sparc64 allnoconfig:

  arch/sparc/mm/init_64.c:822:16: error: unused variable 'paddr'
  arch/sparc/mm/init_64.c:1759:7: error: unused variable 'node'
  arch/sparc/mm/init_64.c:809:12: error: 'memblock_nid_range' defined but not used

The paddr decl can easily be shuffled within the ifdef.  The
memblock_nid_range is just a stub function for when NEED_MULTIPLE_NODES
is off, but the only caller is within a NEED_MULTIPLE_NODES enabled
section, so we can simply delete it.

The unused "node" is slightly more interesting.  In the case of
"# CONFIG_NEED_MULTIPLE_NODES is not set" we no longer get the
definition of:

 #define NODE_DATA(nid)          (node_data[nid])

from arch/sparc/include/asm/mmzone.h - but instead we get:

 #define NODE_DATA(nid)          (&contig_page_data)

from include/linux/mmzone.h -- and since the arg is ignored,
the thing really is unused.  Rather than put in a confusing
looking __maybe_unused, simply splitting the declaration
from the assignment seemed to me to be the least offensive.

Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09 19:58:07 -07:00
David S. Miller
799d40cc10 sparc64: Do not set max_mapnr.
There is no need, since nothing relevant to sparc64 makes
use of this value.

Noticed by Sam Ravnborg.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-27 10:55:08 -07:00
David S. Miller
5ed56f1ad9 sparc64: Use node local allocations for IRQ stacks.
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-26 20:50:34 -07:00
David S. Miller
625d693e97 sparc64: Convert over to NO_BOOTMEM.
With help from Sam Ravnborg.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-26 20:02:23 -07:00
David S. Miller
3423166fdb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2012-04-13 13:32:07 -07:00
Kautuk Consul
c29554f53e sparc/mm/fault_32.c: Port OOM changes to do_sparc_fault
Commit d065bd810b
(mm: retry page fault when blocking on disk transfer) and
commit 37b23e0525
(x86,mm: make pagefault killable)

The above commits introduced changes into the x86 pagefault handler
for making the page fault handler retryable as well as killable.

These changes reduce the mmap_sem hold time, which is crucial
during OOM killer invocation.

Port these changes to 32-bit sparc.

Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-04 15:42:24 -07:00