linux.git/arch/parisc/kernel/entry.S, branch v2.6.17

[PARISC] Further work for multiple page sizes

2006-04-21T22:20:34+00:00

More work towards supporing multiple page sizes on 64-bit. Convert
some assumptions that 64bit uses 3 level page tables into testing
PT_NLEVELS. Also some BUG() to BUG_ON() conversions and some cleanups
to assembler.

Signed-off-by: Helge Deller 
Signed-off-by: Kyle McMartin

[PARISC] Add PREEMPT support

2006-03-30T17:48:54+00:00

Signed-off-by: Kyle McMartin

[PARISC] Fix IOREMAP with a 64-bit kernel

2006-03-30T17:48:44+00:00

We were only copying 32-bits of the PTE/PFN, not the full 52-bits.

Signed-off-by: Helge Deller 
Signed-off-by: Kyle McMartin

[PARISC] Document some register usages in assembly files

2005-11-17T21:32:46+00:00

Document clobbers and args in entry.S and syscall.S.

entry.S: Add comment to indicate that cr27 may recycle and EDEADLOCK
detection is not 100% correct. Since this is only enabled when using
ENABLE_LWS_DEBUG, the user is warned by the comment.

Signed-off-by: Carlos O'Donell 
Signed-off-by: Kyle McMartin

[PARISC] Remove the spurious do_softirq calls from entry.S

2005-10-22T02:54:38+00:00

remove the spurious do_softirq calls from entry.S

With these in we were calling do_softirq twice; plus the calls in
entry.S took no account of nesting.

Signed-off-by: James Bottomley 

Signed-off-by: Kyle McMartin

[PARISC] Fix the alloc_slabmgmt panic

2005-10-22T02:53:26+00:00

Fix the alloc_slabmgmt panic

Hopefully this should also fix a lot of other intermittent kernel bugs.

The problem has been around since 2.6.9-rc2-pa6 when we allowed
floating point registers to be used in kernel code.  The essence of
the problem is that gcc prefers to use floating point for integer
divides and multiples.  Further, it can rely on the values in the no
clobber fp regs being correct across a function call.  Unfortunately,
our task switch function only saves the integer no clobber registers,
not the fp ones, so if gcc makes a function call to any function in
the kernel which could sleep, the values it is relying on in any no
clobber floating point register may be lost.  In the case of
alloc_slabmgmt, the value of the page offset is being stored in %fr12
across a call to kmem_getpages(), which sleeps if no pages are
available.  Thus, the offset can be trashed and the slab code can end
up with a completely bogus address leading to corruption.

Kudos to Randolph who came up with the program to trip this problem at
will and thus allowed it to be tracked and fixed.

Signed-off-by: James Bottomley 

Signed-off-by: Kyle McMartin

[PARISC] Replace uses of LP64 with CONFIG_64BIT

2005-10-22T02:46:48+00:00

2.6.12-rc4-pa3 s/__LP64__/CONFIG_64BIT/ and fixup config.h usage

Signed-off-by: Grant Grundler 

Signed-off-by: Kyle McMartin

[PARISC] Replace some calls to bl with b,l or bv to use longer offsets

2005-10-22T02:42:57+00:00

convert some bl calls to b,l or bv to use longer offsets

Signed-off-by: Randolph Chung 

Signed-off-by: Kyle McMartin

[PARISC] Make sure use of RFI conforms to PA 2.0 and 1.1 arch docs

2005-10-22T02:40:07+00:00

2.6.12-rc4-pa3 : first pass at making sure use of RFI conforms to
PA 2.0 arch pages F-4 and F-5, PA 1.1 Arch page 3-19 and 3-20.

The discussion revolves around all the rules for clearing PSW Q-bit.
The hard part is meeting all the rules for "relied upon translation".

.align directive is used to guarantee the critical sequence ends more than
8 instructions (32 bytes) from the end of page.

Signed-off-by: Grant Grundler 

Signed-off-by: Kyle McMartin

kbuild: m68k,parisc,ppc,ppc64,s390,xtensa use generic asm-offsets.h support

2005-09-09T18:57:26+00:00

Delete obsoleted parts form arch makefiles and rename to asm-offsets.h

Signed-off-by: Sam Ravnborg