25 Jan, 2008
4 commits
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Change the NMI handler to use the die notifier chain to signal anyone
who cares. Add a simple "nmi debugger" which hooks into this chain and
that may dump registers, task state, etc. when it happens.Signed-off-by: Haavard Skinnemoen
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These are derivatives of the AT32AP7000 chip, which means that most of
the code stays the same. Rename a few files, functions, definitions
and config symbols to reflect that they apply to all AP700x chips, and
exclude some platform devices from chips where they aren't present.Signed-off-by: Haavard Skinnemoen
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Add the following fields to /proc/cpuinfo:
* chip type and revision (from the JTAG chip id)
* cpu MHz (from clk_get_rate())
* features (from the CONFIG0 register)Also rename "cpu family" to "cpu arch" and "cpu type" to "cpu core" to
remove some ambiguity.Show chip type and revision at bootup, and clarify that the other
kinds of IDs that we're already printing are for the cpu core and
architecture. Rename "AP7000" to "AP7" since that's the name of the
core.Signed-off-by: Haavard Skinnemoen
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Keep track of processes being debugged (including the kernel itself)
and turn the OCD system on and off as appropriate. Since enabling
debugging turns off some optimizations in the CPU core, this fixes the
issue that enabling KProbes support or simply running a program under
gdbserver will reduce system performance significantly until the next
reboot.The CPU performance will still be reduced for all processes while a
process is being debugged, but this is a lot better than reducing the
performance forever.Signed-off-by: Haavard Skinnemoen
07 Dec, 2007
6 commits
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The current implementation of copy_to_user_page() gives "vaddr" to the
cache instruction when trying to sync the icache with the dcache. If
vaddr does not exist in the TLB, the CPU will silently abort the
operation, which may result in the caches staying out of sync.To fix this, pass the "dst" parameter to flush_icache_range() instead
-- we know this is valid because we just wrote to it.Signed-off-by: Haavard Skinnemoen
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The current debug trap handling code does a number of things that are
illegal according to the AVR32 Architecture manual. Most importantly,
it may try to schedule from Debug Mode, thus clearing the D bit, which
can lead to "undefined behaviour".It seems like this works in most cases, but several people have
observed somewhat unstable behaviour when debugging programs,
including soft lockups. So there's definitely something which is not
right with the existing code.The new code will never schedule from Debug mode, it will always exit
Debug mode with a "retd" instruction, and if something not running in
Debug mode needs to do something debug-related (like doing a single
step), it will enter debug mode through a "breakpoint" instruction.
The monitor code will then return directly to user space, bypassing
its own saved registers if necessary (since we don't actually care
about the trapped context, only the one that came before.)This adds three instructions to the common exception handling code,
including one branch. It does not touch super-hot paths like the TLB
miss handler.Signed-off-by: Haavard Skinnemoen
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Generate a new set of OCD register definitions in asm/ocd.h and rename
__mfdr() and __mtdr() to ocd_read() and ocd_write() respectively.The bitfield definitions are a lot more complete now, and they are
entirely based on bit numbers, not masks. This is because OCD
registers are frequently accessed from assembly code, where bit
numbers are a lot more useful (can be fed directly to sbr, bfins,
etc.)Bitfields that consist of more than one bit have two definitions:
_START, which indicates the number of the first bit, and _SIZE, which
indicates the number of bits. These directly correspond to the
parameters taken by the bfextu, bfexts and bfins instructions.Signed-off-by: Haavard Skinnemoen
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Signed-off-by: Haavard Skinnemoen
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The 'H' bit is bit 29, while the 'R' bit doesn't exist. Luckily, we
don't actually use any of the bits in question.Also update show_regs() to show the Debug Mask and Debug state bits.
Signed-off-by: Haavard Skinnemoen
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We really need to check TIF_RESTORE_SIGMASK before returning to
userspace. The existing code does not necessarily do this.Define the work masks as a bitwise OR of the respective flags instead
of a hardcoded hex value to make it easier to spot errors like this in
the future.Signed-off-by: Haavard Skinnemoen
15 Nov, 2007
1 commit
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The enable bit was missing...
Signed-off-by: Haavard Skinnemoen
24 Oct, 2007
1 commit
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The latest sg changes introduce the following build errors on AVR32:
include/asm/dma-mapping.h: In function ‘dma_map_sg’:
include/asm/dma-mapping.h:220: error: implicit declaration of function ‘sg_page’
include/asm/dma-mapping.h:220: error: invalid operands to binary -
include/asm/dma-mapping.h:221: error: implicit declaration of function ‘sg_virt’
include/asm/dma-mapping.h:221: warning: assignment makes pointer from integer without a cast
include/asm/dma-mapping.h: In function ‘dma_sync_sg_for_device’:
include/asm/dma-mapping.h:330: warning: passing argument 2 of ‘dma_cache_sync’ makes pointer from integer without a castFix it by including the correct header file, i.e. linux/scatterlist.h
instead of asm/scatterlist.h.Signed-off-by: Haavard Skinnemoen
23 Oct, 2007
7 commits
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* 'for-linus' of ssh://master.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6:
[AVR32] ARRAY_SIZE() cleanup
[AVR32] Implement at32_add_device_cf()
[AVR32] Implement more at32_add_device_foo() functions
[AVR32] Fix a couple of sparse warnings
[AVR32] Wire up AT73C213 sound driver on ATSTK1000 board
[AVR32] Platform code for pata_at32 -
Signed-off-by: Jens Axboe
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Implement at32_add_device_cf() which will add a platform_device for
the at32_cf driver (not merged yet). Separate out most of the
at32_add_device_ide() code and use it to implement
at32_add_device_cf() as well.This changes the API in the following ways:
* The board code must initialize data->cs to the chipselect ID to
use before calling any of these functions.
* The board code must use GPIO_PIN_NONE to indicate unused CF pins.Signed-off-by: Haavard Skinnemoen
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Implement functions for adding platform devices for TWI, MCI, AC97C
and ABDAC. They may need to be modified to cope with platform data,
etc. when the corresponding drivers are ready to be merged, but such
changes are much less likely to conflict than adding support for a
whole new type of device.Signed-off-by: Haavard Skinnemoen
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This patch adds platform code for PATA devices on the AP7000.
[hskinnemoen@atmel.com: board code left out for now since stk1000
doesn't support IDE out of the box]
Signed-off-by: Kristoffer Nyborg Gregertsen
Signed-off-by: Haavard Skinnemoen -
Add a Kconfig entry which will toggle some sanity checks on the sg
entry and tables.Signed-off-by: Jens Axboe
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Change the page member of the scatterlist structure to be an unsigned
long, and encode more stuff in the lower bits:- Bits 0 and 1 zero: this is a normal sg entry. Next sg entry is located
at sg + 1.
- Bit 0 set: this is a chain entry, the next real entry is at ->page_link
with the two low bits masked off.
- Bit 1 set: this is the final entry in the sg entry. sg_next() will return
NULL when passed such an entry.It's thus important that sg table users use the proper accessors to get
and set the page member.Signed-off-by: Jens Axboe
20 Oct, 2007
2 commits
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forbid asm/bitops.h direct inclusion
Because of compile errors that may occur after bit changes if asm/bitops.h is
included directly without e.g. linux/kernel.h which includes linux/bitops.h,
forbid direct inclusion of asm/bitops.h. Thanks to Adrian Bunk.Signed-off-by: Jiri Slaby
Cc: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Nobody uses flush_tlb_pgtables anymore, this patch removes all remaining
traces of it from all archs.Signed-off-by: Benjamin Herrenschmidt
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Oct, 2007
1 commit
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Introduce test_and_set_bit_lock / clear_bit_unlock bitops with lock semantics.
Convert all architectures to use the generic implementation.Signed-off-by: Nick Piggin
Acked-By: David Howells
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Haavard Skinnemoen
Cc: Bryan Wu
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: "Luck, Tony"
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Cc: Greg Ungerer
Cc: Ralf Baechle
Cc: Kyle McMartin
Cc: Matthew Wilcox
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Paul Mundt
Cc: Kazumoto Kojima
Cc: Richard Curnow
Cc: William Lee Irwin III
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Cc: Miles Bader
Cc: Andi Kleen
Cc: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2007
5 commits
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dma_cache_(wback|inv|wback_inv) were the earliest attempt on a generalized
cache managment API for I/O purposes. Originally it was basically the raw
MIPS low level cache API exported to the entire world. The API has
suffered from a lack of documentation, was not very widely used unlike it's
more modern brothers and can easily be replaced by dma_cache_sync. So
remove it rsp. turn the surviving bits back into an arch private API, as
discussed on linux-arch.Signed-off-by: Ralf Baechle
Acked-by: Paul Mundt
Acked-by: Paul Mackerras
Acked-by: David S. Miller
Acked-by: Kyle McMartin
Acked-by: Haavard Skinnemoen
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the __STRICT_ANSI__ check from the __u64/__s64 declaration on
32bit targets.GCC can be made to warn about usage of long long types with ISO C90
(-ansi), but only with -pedantic. You can write this in a way that even
then it doesn't cause warnings, namely by:#ifdef __GNUC__
__extension__ typedef __signed__ long long __s64;
__extension__ typedef unsigned long long __u64;
#endifThe __extension__ keyword in front of this switches off any pedantic
warnings for this expression.Signed-off-by: Olaf Hering
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
DECLARE_MUTEX_LOCKED was used for semaphores used as completions and we've
got rid of them. Well, except for one in libusual that the maintainer
explicitly wants to keep as semaphore. So convert that useage to an
explicit sema_init and kill of DECLARE_MUTEX_LOCKED so that new code is
reminded to use a completion.Signed-off-by: Christoph Hellwig
Acked-by: "Satyam Sharma"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce architecture dependent kretprobe blacklists to prohibit users
from inserting return probes on the function in which kprobes can be
inserted but kretprobes can not.This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and
registers "__switch_to" to the blacklist on x86-64, because that mark is to
prohibit user from inserting only kretprobe.Signed-off-by: Masami Hiramatsu
Cc: Prasanna S Panchamukhi
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
x86(-64) are the last architectures still using the page fault notifier
cruft for the kprobes page fault hook. This patch converts them to the
proper direct calls, and removes the now unused pagefault notifier bits
aswell as the cruft in kprobes.c that was related to this mess.I know Andi didn't really like this, but all other architecture maintainers
agreed the direct calls are much better and besides the obvious cruft
removal a common way of dealing with kprobes across architectures is
important aswell.[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix sparc64]
Signed-off-by: Christoph Hellwig
Cc: Andi Kleen
Cc:
Cc: Prasanna S Panchamukhi
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Oct, 2007
6 commits
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The implementation of __builtin_xchg() in at least some versions of
avr32 gcc is buggy. Rather than find out exactly which versions that
have this bug, let's just avoid the problem altogether by implementing
xchg() in inline assembly.Also, in most architectures, xchg() seems to imply a memory barrier,
while the existing avr32 implementation did not. This patch also fixes
that discrepancy.Signed-off-by: Haavard Skinnemoen
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Ignore a few syscalls that are irrelevant because they're either old,
depends on NUMA or depends on SMP.Signed-off-by: Haavard Skinnemoen
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This patch makes the SMC configuration take timings in clock cycles
instead of nanoseconds. A function to calculate timings in clock
cycles is added.This patch removes the rounding troubles of the previous SMC
configuration method.[hskinnemoen@atmel.com: fix atstk1002/atngw100 flash config]
Signed-off-by: Kristoffer Nyborg Gregertsen
Signed-off-by: Haavard Skinnemoen -
I don't think the dma_sync_*_for_cpu ever did anything useful. We
flush the relevant cache lines when mapping the buffer or when calling
dma_sync_*_for_device(), and the CPU isn't allowed to touch the buffer
after that.In other words, if these functions actually have anything to flush
from the caches, we're already in trouble.Signed-off-by: Haavard Skinnemoen
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Implement at32_add_device_usba() and use it to wire up the USBA device
on ATSTK1000 and ATNGW100.Signed-off-by: Haavard Skinnemoen
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This patch add multidrive support for pio driver
Signed-off-by: Matteo Vit - Dave S.r.l.
Signed-off-by: Haavard Skinnemoen
15 Aug, 2007
4 commits
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Add empty definition of mmiowb() since some drivers need it. Uncached
writes are strongly ordered on AVR32. They may be delayed if the
dcache is busy doing a writeback, but AFAICT that's not what this
macro is supposed to deal with, at least on UP systems.We might have to revisit this definition when a SMP-capable AVR32 CPU
comes along, depending on how the busses and cache coherency stuff
end up being implemented.Signed-off-by: Haavard Skinnemoen
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The current definition of pte_page() masks out valid bits from the
physical address, causing vmalloc_to_page() to misbehave. This may
lead to everything from mmap() silently accessing the wrong data to
"invalid pte" errors dumped by the kernel.Also remove the now-unused definition of PTE_PHYS_MASK.
Thanks to Matteo Vit for discovering this bug.
Signed-off-by: Haavard Skinnemoen
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There's really no need to retry an allocation with __GFP_REPEAT set.
Also, use get_zeroed_page() and __GFP_ZERO to eliminate the extra call
to clear_page() afterwards.Signed-off-by: Haavard Skinnemoen
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Signed-off-by: Mariusz Kozlowski
Signed-off-by: Haavard Skinnemoen
02 Aug, 2007
1 commit
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Fixes WARN_ON() on bitfiels ops for all architectures that have
been left out in 8d4fbcfbe0a4bfc73e7f0297c59ae514e1f1436f.Cc: Alexey Dobriyan
Cc: Herbert Xu
Cc: Haavard Skinnemoen
Cc: Matthew Wilcox
Cc: Kyle McMartin
Cc: Martin Schwidefsky
Acked-by: Paul Mundt
Signed-off-by: Heiko Carstens
Signed-off-by: Linus Torvalds
01 Aug, 2007
1 commit
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Remove unused TIF_NOTIFY_RESUME flag for all processor architectures. The
flag was not used excecpt on IA-64 where the patch replaces it with
TIF_PERFMON_WORK.Signed-off-by: stephane eranian
Cc:
Cc: "Luck, Tony"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Jul, 2007
1 commit
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New arch macro STACK_TOP_MAX it gives the larges valid stack address for the
architecture in question.It differs from STACK_TOP in that it will not distinguish between
personalities but will always return the largest possible address.This is used to create the initial stack on execve, which we will move down to
the proper location once the binfmt code has figured out where that is.Signed-off-by: Peter Zijlstra
Signed-off-by: Ollie Wild
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
