Commit graph

1318 commits

Author SHA1 Message Date
Sonic Zhang
7fe1a91281 blackfin,kgdb: Do not put PC in gdb_regs into retx.
In blackfin, kgdb is running in delayed exception IRQ5 other than in
exception IRQ3 directly.  Register reti other than retx in pt_regs is
the kgdb return address. So, don't put PC in gdb_regs into retx.

CC: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-01-07 11:58:37 -06:00
Jason Wessel
0fde663708 blackfin,kgdb,probe_kernel: Cleanup probe_kernel_read/write
Blackfin needs it own arch specific probe_kernel_read() and
probe_kernel_write().

This was moved out of the kgdb code and into the
arch/blackfin/maccess.c, because it is a generic kernel api.

The arch specific kgdb.c for blackfin was cleaned of all functions
which exist in the kgdb core that do the same thing after resolving
the probe_kernel_read() and probe_kernel_write().  This also
eliminated the need for most of the #include's.

CC: Sonic Zhang <sonic.adi@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-01-07 11:58:36 -06:00
Mike Frysinger
04e4f2b18c FDPIC: Respect PT_GNU_STACK exec protection markings when creating NOMMU stack
The current code will load the stack size and protection markings, but
then only use the markings in the MMU code path.  The NOMMU code path
always passes PROT_EXEC to the mmap() call.  While this doesn't matter
to most people whilst the code is running, it will cause a pointless
icache flush when starting every FDPIC application.  Typically this
icache flush will be of a region on the order of 128KB in size, or may
be the entire icache, depending on the facilities available on the CPU.

In the case where the arch default behaviour seems to be desired
(EXSTACK_DEFAULT), we probe VM_STACK_FLAGS for VM_EXEC to determine
whether we should be setting PROT_EXEC or not.

For arches that support an MPU (Memory Protection Unit - an MMU without
the virtual mapping capability), setting PROT_EXEC or not will make an
important difference.

It should be noted that this change also affects the executability of
the brk region, since ELF-FDPIC has that share with the stack.  However,
this is probably irrelevant as NOMMU programs aren't likely to use the
brk region, preferring instead allocation via mmap().

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-06 18:16:02 -08:00
Linus Torvalds
5a865c0606 Merge branch 'for-33' of git://repo.or.cz/linux-kbuild
* 'for-33' of git://repo.or.cz/linux-kbuild: (29 commits)
  net: fix for utsrelease.h moving to generated
  gen_init_cpio: fixed fwrite warning
  kbuild: fix make clean after mismerge
  kbuild: generate modules.builtin
  genksyms: properly consider  EXPORT_UNUSED_SYMBOL{,_GPL}()
  score: add asm/asm-offsets.h wrapper
  unifdef: update to upstream revision 1.190
  kbuild: specify absolute paths for cscope
  kbuild: create include/generated in silentoldconfig
  scripts/package: deb-pkg: use fakeroot if available
  scripts/package: add KBUILD_PKG_ROOTCMD variable
  scripts/package: tar-pkg: use tar --owner=root
  Kbuild: clean up marker
  net: add net_tstamp.h to headers_install
  kbuild: move utsrelease.h to include/generated
  kbuild: move autoconf.h to include/generated
  drop explicit include of autoconf.h
  kbuild: move compile.h to include/generated
  kbuild: drop include/asm
  kbuild: do not check for include/asm-$ARCH
  ...

Fixed non-conflicting clean merge of modpost.c as per comments from
Stephen Rothwell (modpost.c had grown an include of linux/autoconf.h
that needed to be changed to generated/autoconf.h)
2009-12-17 07:23:42 -08:00
Linus Torvalds
525995d77c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (88 commits)
  Blackfin: Convert BUG() to use unreachable()
  Blackfin: define __NR_recvmmsg
  Blackfin: drop duplicate sched_clock
  Blackfin: NOMPU: skip DMA ICPLB hole when it is redundant
  Blackfin: MPU: add missing __init markings
  Blackfin: add support for TIF_NOTIFY_RESUME
  Blackfin: kgdb_test: clean up code a bit
  Blackfin: convert kgdbtest to proc_fops
  Blackfin: convert cyc2ns() to clocksource_cyc2ns()
  Blackfin: ip0x: pull in asm/portmux.h for P_xxx defines
  Blackfin: drop unused ax88180 resources
  Blackfin: bf537-stamp: add ADF702x network driver resources
  Blackfin: bf537-stamp: add CAN resources
  Blackfin: bf537-stamp: add AD5258 i2c address
  Blackfin: bf537-stamp: add adau1761 i2c address
  Blackfin: bf537-stamp: add adau1371 i2c address
  Blackfin: bf537-stamp: add ADP8870 resources
  Blackfin: bf537-stamp: kill AD714x board-specific Kconfigs
  Blackfin: bf537-stamp: update ADP5520 resources
  Blackfin: bf537-stamp: add ADXL346 orientation sensing support
  ...
2009-12-16 10:52:35 -08:00
Linus Torvalds
74f3ae7434 Merge branch 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  modpost: fix segfault with short symbol names
  module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y
  Kbuild: clear marker out of modpost
  module: make MODULE_SYMBOL_PREFIX into a CONFIG option
  ARM: unexport symbols used to implement floating point emulation
  ARM: use unified discard definition in linker script
  x86: don't export inline function
  sparc64: don't export static inline pci_ functions
2009-12-16 10:47:24 -08:00
Christoph Hellwig
698ba7b5a3 elf: kill USE_ELF_CORE_DUMP
Currently all architectures but microblaze unconditionally define
USE_ELF_CORE_DUMP.  The microblaze omission seems like an error to me, so
let's kill this ifdef and make sure we are the same everywhere.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: <linux-arch@vger.kernel.org>
Cc: Michal Simek <michal.simek@petalogix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:12 -08:00
Michael Hennerich
9cfe4a93e5 fbdev: bfin-lq035q1-fb: new Blackfin Landscape LCD EZ-Extender driver
Framebuffer driver for the Landscape LCD EZ-Extender (ADZS-BFLLCD-EZEXT)
http://docs.blackfin.uclinux.org/doku.php?id=hw:cards:landscape_lcd_ez-extender

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:01 -08:00
David Daney
64a2b16802 Blackfin: Convert BUG() to use unreachable()
Use the new unreachable() macro instead of for(;;);

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 08:38:35 -05:00
Mike Frysinger
5540a44e3e Blackfin: define __NR_recvmmsg
Commit a2e2725541 added recvmmsg to a bunch of arches (including the
Blackfin entry.S), but didn't actually add the new __NR_ define for it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 04:07:32 -05:00
Alan Jenkins
9e1b9b8072 module: make MODULE_SYMBOL_PREFIX into a CONFIG option
The next commit will require the use of MODULE_SYMBOL_PREFIX in
.tmp_exports-asm.S.  Currently it is mixed in with C structure
definitions in "asm/module.h".  Move the definition of this arch option
into Kconfig, so it can be easily accessed by any code.

This also lets modpost.c use the same definition.  Previously modpost
relied on a hardcoded list of architectures in mk_elfconfig.c.

A build test for blackfin, one of the two MODULE_SYMBOL_PREFIX archs,
showed the generated code was unchanged.  vmlinux was identical save
for build ids, and an apparently randomized suffix on a single "__key"
symbol in the kallsyms data).

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Mike Frysinger <vapier@gentoo.org> (blackfin)
CC: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-12-15 16:28:26 +10:30
Mike Frysinger
8a833110f1 Blackfin: drop duplicate sched_clock
The Blackfin sched_clock() func is pretty much a duplicate of the common
version, so just punt it.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:56 -05:00
Mike Frysinger
a797a0e242 Blackfin: NOMPU: skip DMA ICPLB hole when it is redundant
Normally there is no user-reserved memory after the DMA region which means
there is no user-reserved ICPLB coverage.  So the DMA hole can be covered
by the large hole that is always added to cover up to the async bank.  We
only need an explicit DMA whole when we also add an explicit mapping for
the user-reserved memory.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:54 -05:00
Mike Frysinger
0a68b5341d Blackfin: MPU: add missing __init markings
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:53 -05:00
Barry Song
d1be2e485b Blackfin: add support for TIF_NOTIFY_RESUME
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:52 -05:00
Mike Frysinger
88f7c2fb0f Blackfin: kgdb_test: clean up code a bit
- document simple global symbols
- convert printk to pr_*
- clean up spurious whitespace
- use min_t()

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:50 -05:00
Alexey Dobriyan
397b761cc4 Blackfin: convert kgdbtest to proc_fops
The read_proc and write_proc interfaces are going to be removed in the
common kernel code.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:49 -05:00
Mike Frysinger
c768a943fd Blackfin: convert cyc2ns() to clocksource_cyc2ns()
The former no longer exists.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:47 -05:00
Mike Frysinger
99e452e5d3 Blackfin: ip0x: pull in asm/portmux.h for P_xxx defines
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:44 -05:00
Mike Frysinger
caf0ea8582 Blackfin: drop unused ax88180 resources
The ax88180 driver was never merged, so drop the corresponding resources.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:43 -05:00
Michael Hennerich
efaf7cd955 Blackfin: bf537-stamp: add ADF702x network driver resources
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:40 -05:00
Barry Song
706a01b1c6 Blackfin: bf537-stamp: add CAN resources
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:38 -05:00
Michael Hennerich
1f13f2fdca Blackfin: bf537-stamp: add AD5258 i2c address
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:35 -05:00
Cliff Cai
04267638e0 Blackfin: bf537-stamp: add adau1761 i2c address
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:32 -05:00
Cliff Cai
d53127ffd6 Blackfin: bf537-stamp: add adau1371 i2c address
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:31 -05:00
Michael Hennerich
78756c6230 Blackfin: bf537-stamp: add ADP8870 resources
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:29 -05:00
Mike Frysinger
5b7c57751e Blackfin: bf537-stamp: kill AD714x board-specific Kconfigs
Include the AD714x SPI/I2C resources based on what is possible.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:25 -05:00
Michael Hennerich
1d23dc89f2 Blackfin: bf537-stamp: update ADP5520 resources
Matches feedback for driver changes.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:23 -05:00
Michael Hennerich
5db4036b46 Blackfin: bf537-stamp: add ADXL346 orientation sensing support
The ADXL34x driver was updated to include orientation sensing, so have the
bf537-stamp use it by default.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:20 -05:00
Michael Hennerich
57af8edf3f Blackfin: bf537-stamp/bf548-ezkit: update ADXL34x resources
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:18 -05:00
Mike Frysinger
31ad0e27ed Blackfin: BF51x: unify def/cdef headers
Whole lot of duplicated code here just went bye bye.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:16 -05:00
Mike Frysinger
b1740549d4 Blackfin: BF52x: unify def/cdef headers
Whole lot of duplicated code here just went bye bye.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:13 -05:00
Mike Frysinger
7eb87fd3f1 Blackfin: BF537: push down error masks to avoid namespace pollution
The error masks are only needed in the BF537 demux error code, so instead
of needing all the short peripheral defines in global space, push these
masks into the one file where they are actually needed.  This fixes a
bunch of define collisions with common code (can/serial/etc...).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Barry Song <barry.song@analog.com>
2009-12-15 00:16:11 -05:00
Yi Li
578d36f5e1 Blackfin: SMP: don't start up core b until its state has been completely onlined
When testing PREEMPT_RT kernel on BF561-EZKit, the kernel blocks while
booting.  When the kernel initializes the ethernet driver, it sleeps and
never wakes up.

The issue happens when the kernel waits for a timer for Core B to timeout
(the timers are per-cpu based: static DEFINE_PER_CPU(struct tvec_base *,
tvec_bases) = &boot_tvec_bases).

However, the ksoftirqd thread for Core B (note, the ksoftirqd thread is
also per-cpu based) cannot work properly, and the timers for Core B never
times out.

When ksoftirqd() for the first time runs on core B, it is possible core A
is still initializing core B (see smp_init() -> cpu_up() -> __cpu_up()).
So the "cpu_is_offline()" check may return true and ksoftirqd moves to
"wait_to_die".

So delay the core b start up until the per-cpu timers have been set up
fully.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:09 -05:00
Barry Song
ad774b7cb0 Blackfin: convert to asm-generic pci headers
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:07 -05:00
Mike Frysinger
2d40292b5a Blackfin: io.h: fix random busted whitespace
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:04 -05:00
Barry Song
dd3b0e3e6a Blackfin: dma-mapping.h: flesh out missing DMA mapping functions
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:01 -05:00
Barry Song
a00b4fe5ce Blackfin: workaround anomaly 05000310
While fetching instructions at the boundary of L1 instruction SRAM, a false
External Memory Addressing Error might be triggered.  We should ignore this
and continue on our way to avoid random crashes.

Because hardware errors are not exact in the Blackfin architecture, we need
to catch a few more common cases when the code flow changes and the signal
is finally delivered.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:59 -05:00
Mike Frysinger
340a1be1ee Blackfin: drop ptrace() write support for fixed code/bootrom
These regions are either read-only and won't work anyways (bootrom), or
we don't want people screwing with them because they're shared between
all processes (fixed code).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:57 -05:00
Barry Song
e187837b6f Blackfin: MPU: support XIP in async flash memory
The NOMPU code already supported executing in the async banks, so this
brings the MPU code in line.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:54 -05:00
Barry Song
d45e8db1b2 Blackfin: drop 4KB reserve at end of memory
The point of this small chunk was to avoid anomaly 05000310.  This never
really seemed to do what it was intended though -- no valid CPLBs exist
over the reserved memory, and there is often memory before it anyways (due
to the uClinux MTD and/or reserved DMA region).  Plus, it doesn't address
the L1 instruction case.

So drop this chunk as it wastes memory and is affront to humanity.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:50 -05:00
Barry Song
c45c06596e Blackfin: support smaller uncached DMA chunks for memory constrained systems
When working with 8 meg systems, forcing a 1 meg DMA chunk heavily cuts
into the available resources.  So support smaller chunks to better cover
needs for these systems.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:48 -05:00
Mike Frysinger
5df326aca4 Blackfin: push BF5Xx configs down into mach-specific Kconfigs
While we're moving the BF54x code, have the BF54xM variants select the
normal BF54x values so that the rest of the Kconfig tree doesn't need to
check the BF54xM variant everytime it wants to check the BF54x.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:45 -05:00
Mike Frysinger
2f5a086402 Blackfin: finish_atomic_sections: optimize the RTS step
No point in returning to userspace just to have it immediately perform the
RTS step.  We have to update the PC anyways, so do the RTS too.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:42 -05:00
Sonic Zhang
0d5e35940b Blackfin: kgdb: punt dead code
None of these vars/funcs were being used.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:40 -05:00
Mike Frysinger
e34132f40b Blackfin: reject NULL callback in set_dma_callback()
It makes no sense to call this function with a NULL callback.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:37 -05:00
Mike Frysinger
43acb9cdef Blackfin: punt dead/unused flash mem_init settings
I don't think these defines were ever used.  At any rate, we have common
bit defines for all parts as well as a Kconfig option to declare the EBIU
async timings, and no one has really complained about this so far.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:33 -05:00
Mike Frysinger
8c0b4351cc Blackfin: gptimers: use unsigned timer/group ids
Since we always use these ids as unsigned values, and we have some assert
code to make sure they don't exceed a limit, avoid signed issues.

Reported-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:30 -05:00
Robin Getz
dbc5e6989e Blackfin: don't walk VMAs when oopsing
If we're double faulting, then we have to assume the VMAs are not safe as
broken pointers here will prevent full trace output for the double fault.
Shouldn't be a big problem though as rarely is a double fault caused by
code in userspace.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:28 -05:00
Mike Frysinger
e92d32fcb9 Blackfin: force BFD target when linking modules
This allows us to use any Blackfin toolchain to create kernel modules
(such as the FDPIC bfin-linux-uclibc toolchain).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:25 -05:00