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* Blackfin: handle BF561 Core B memory regions better when SMP=nMike Frysinger2009-07-16
| | | | | | | | | Rather than assume Core B is always run with caches turned on, let people load into any of the on-chip memory regions. It is their business how the SRAM/Cache regions are utilized, so don't prevent them from being able to load into them. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: unify memory region checks between kgdb and trapsMike Frysinger2009-06-22
| | | | | | | | | The kgdb (in multiple places) and traps code developed pretty much identical checks for how to access different regions of the Blackfin memory map, but each wasn't 100%, so unify them to avoid duplication, bitrot, and bugs with edge cases. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: convert irq/process to asm-genericMike Frysinger2009-06-18
| | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: push access_ok() L1 attribute downMike Frysinger2009-06-12
| | | | | | | | | There is no need for the L1 attribute to be on the prototype of the access_ok() function as all consumers of the function do not care where it lives -- they'll always use pcrel calls to get to it. This prevents pointless recompiles of most of the system when this config option changes. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Merge git://git.infradead.org/mtd-2.6Linus Torvalds2009-04-06
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.infradead.org/mtd-2.6: (53 commits) [MTD] struct device - replace bus_id with dev_name(), dev_set_name() [MTD] [NOR] Fixup for Numonyx M29W128 chips [MTD] mtdpart: Make ecc_stats more realistic. powerpc/85xx: TQM8548: Update DTS file for multi-chip support powerpc: NAND: FSL UPM: document new bindings [MTD] [NAND] FSL-UPM: Add wait flags to support board/chip specific delays [MTD] [NAND] FSL-UPM: add multi chip support [MTD] [NOR] Add device parent info to physmap_of [MTD] [NAND] Add support for NAND on the Socrates board [MTD] [NAND] Add support for 4KiB pages. [MTD] sysfs support should not depend on CONFIG_PROC_FS [MTD] [NAND] Add parent info for CAFÉ controller [MTD] support driver model updates [MTD] driver model updates (part 2) [MTD] driver model updates [MTD] [NAND] move gen_nand's probe function to .devinit.text [MTD] [MAPS] move sa1100 flash's probe function to .devinit.text [MTD] fix use after free in register_mtd_blktrans [MTD] [MAPS] Drop now unused sharpsl-flash map [MTD] ofpart: Check name property to determine partition nodes. ... Manually fix trivial conflict in drivers/mtd/maps/Makefile
| * [MTD] Fix a bad dependency in the Blackfin codeBernd Schmidt2009-03-24
| | | | | | | | | | | | | | | | | | | | Fix a bad dependency in the Blackfin code on a RomFS config symbol that doesn't exist upstream. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | Simplify copy_thread()Alexey Dobriyan2009-04-02
|/ | | | | | | | | | First argument unused since 2.3.11. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin arch: merge adeos blackfin part to arch/blackfin/Yi Li2009-01-07
| | | | | | | | | | | | | | | | | | [Mike Frysinger <vapier.adi@gmail.com>: - handle bf531/bf532/bf534/bf536 variants in ipipe.h - cleanup IPIPE logic for bfin_set_irq_handler() - cleanup ipipe asm code a bit and add missing ENDPROC() - simplify IPIPE code in trap_c - unify some of the IPIPE code and fix style - simplify DO_IRQ_L1 handling with ipipe code - revert IRQ_SW_INT# addition from ipipe merge - remove duplicate get_{c,s}clk() prototypes ] Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: smp patch cleanup from LKML reviewGraf Yang2009-01-07
| | | | | | | | | 1. Use inline get_l1_... functions instead of macro 2. Fix compile issue about smp barrier functions Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: SMP supporting patchset: Blackfin kernel and memory ↵Graf Yang2008-11-18
| | | | | | | | | | | | | | management code Blackfin dual core BF561 processor can support SMP like features. https://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like In this patch, we provide SMP extend to Blackfin kernel and memory management code Singed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: move EXPORT_SYMBOL to the place where it is actually definedMike Frysinger2008-10-27
| | | | | | | | | | - kernel_thread - irq_flags - checksum Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: fix bug - shared lib function in L2 failed be calledJie Zhang2008-10-28
| | | | | | | | Allow user space to access L2 SRAM. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* nohz: prevent tick stop outside of the idle loopThomas Gleixner2008-07-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jack Ren and Eric Miao tracked down the following long standing problem in the NOHZ code: scheduler switch to idle task enable interrupts Window starts here ----> interrupt happens (does not set NEED_RESCHED) irq_exit() stops the tick ----> interrupt happens (does set NEED_RESCHED) return from schedule() cpu_idle(): preempt_disable(); Window ends here The interrupts can happen at any point inside the race window. The first interrupt stops the tick, the second one causes the scheduler to rerun and switch away from idle again and we end up with the tick disabled. The fact that it needs two interrupts where the first one does not set NEED_RESCHED and the second one does made the bug obscure and extremly hard to reproduce and analyse. Kudos to Jack and Eric. Solution: Limit the NOHZ functionality to the idle loop to make sure that we can not run into such a situation ever again. cpu_idle() { preempt_disable(); while(1) { tick_nohz_stop_sched_tick(1); <- tell NOHZ code that we are in the idle loop while (!need_resched()) halt(); tick_nohz_restart_sched_tick(); <- disables NOHZ mode preempt_enable_no_resched(); schedule(); preempt_disable(); } } In hindsight we should have done this forever, but ... /me grabs a large brown paperbag. Debugged-by: Jack Ren <jack.ren@marvell.com>, Debugged-by: eric miao <eric.y.miao@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [Blackfin] arch: fix bug - breaking the atomic sections code.Bernd Schmidt2008-05-06
| | | | | | | | | | | | The following cleanup patch: add __user markings to a few userspace system functions mysteriously added a "&" operator that doesn't belong in there, breaking the atomic sections code. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* [Blackfin] arch: This allows XIP to work with FD-PIC.Bernd Schmidt2008-04-23
| | | | | | | | | | | | | | | | | | | Previously, init failed to do anything meaningful; it turns out that the reason is that FD-PIC has a readonly data section which can be located in the XIP filesystem, and various address checks in the kernel reject such addresses for syscall arguments. Hence, init's execve ("/bin/sh", ...) failed with error code EFAULT. There's room for improvement here: in case people want to have filesystems on flash rather than in main memory, _access_ok should be modified to allow this. This bug fix is also dedicated to Michael Hennerich. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* [Blackfin] arch: add missing __user marking to ss_sp member of signalstack ↵Mike Frysinger2008-03-06
| | | | | | | | and a few userspace system functions Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* [Blackfin] arch: initial generic time and clock sourcesVitja Makarov2008-02-28
| | | | | | | | | This patch enables Hight-Res Timers and tickless kernel Signed-off-by: Vitja Makarov <vitja.makarov@gmail.com> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* aout: remove unnecessary inclusions of {asm, linux}/a.out.hDavid Howells2008-02-08
| | | | | | | | | | Remove now unnecessary inclusions of {asm,linux}/a.out.h. [akpm@linux-foundation.org: fix alpha build] Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [Blackfin] arch: scrub dead alive/idle LED codeMike Frysinger2007-12-24
| | | | | | | | | if it does get re-added, it needs to be in the boards directory, not common code ... or it needs a re-implementation Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Clean up dump_bfin_memRobin Getz2007-12-23
| | | | | | | | | | Clean up dump_bfin_mem so that it will display content from the kernel, as well as l1 instruction, when deferred HW errors happen, print out the last frame info if it makes sense. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: split apart dump_bfin_regs and merge/remove show_regs from ↵Mike Frysinger2007-11-21
| | | | | | | | process.c, which was largely duplicated Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: remove dump_thread()Adrian Bunk2007-11-17
| | | | | | | | | | | | | The only user is the a.out support. It was therefore removed prior to the blackfin merge from all architectures not supporting a.out. Currently, Blackfin doesn't suppport a.out. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: fix bug libstdc++ calling writev with an iovec containing { ↵Bernd Schmidt2007-10-10
| | | | | | | | | | | | | NULL, 0 } fails on Blackfin Fix a problem reported in the forums - libstdc++ can call writev with an iovec containing { NULL, 0 }, which works fine on i686-linux, but fails on Blackfin. Fixed by allowing size 0 transfers to/from userspace regardless of the address. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: rewrite our reboot code in CMike Frysinger2007-10-10
| | | | | | | | | | rewrite our reboot code in C rather than assembly to be like other architectures and to allow board maintainers to define custom behavior Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: to do some consolidation of common code and common name spacesRobin Getz2007-10-10
| | | | | | | | now all BLKFIN should be BFIN, should be no functional changes. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: after removing fs.h from mm.h, fix the broken on Blackfin archBryan Wu2007-08-11
| | | | | | | Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin arch: cleanup warnings from checkpatch -- no functional changesMike Frysinger2007-07-12
| | | | | | Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: defines and provides entry points for certain user space ↵Bernd Schmidt2007-06-20
| | | | | | | | | | | | | | | | | | functions at fixed addresses This patch defines (and provides) entry points for certain user space functions at fixed addresses. The Blackfin has no usable atomic instructions, but we can ensure that these code sequences appear atomic from a user space point of view by detecting when we're in the process of executing them during the interrupt handler return path. This allows much more efficient pthread lock implementations than the bfin_spinlock syscall we're currently using. Also provided is a small sys_rt_sigreturn stub which can be used by the signal handler setup code. The signal.c part will be committed separately. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* blackfin architectureBryan Wu2007-05-07
This adds support for the Analog Devices Blackfin processor architecture, and currently supports the BF533, BF532, BF531, BF537, BF536, BF534, and BF561 (Dual Core) devices, with a variety of development platforms including those avaliable from Analog Devices (BF533-EZKit, BF533-STAMP, BF537-STAMP, BF561-EZKIT), and Bluetechnix! Tinyboards. The Blackfin architecture was jointly developed by Intel and Analog Devices Inc. (ADI) as the Micro Signal Architecture (MSA) core and introduced it in December of 2000. Since then ADI has put this core into its Blackfin processor family of devices. The Blackfin core has the advantages of a clean, orthogonal,RISC-like microprocessor instruction set. It combines a dual-MAC (Multiply/Accumulate), state-of-the-art signal processing engine and single-instruction, multiple-data (SIMD) multimedia capabilities into a single instruction-set architecture. The Blackfin architecture, including the instruction set, is described by the ADSP-BF53x/BF56x Blackfin Processor Programming Reference http://blackfin.uclinux.org/gf/download/frsrelease/29/2549/Blackfin_PRM.pdf The Blackfin processor is already supported by major releases of gcc, and there are binary and source rpms/tarballs for many architectures at: http://blackfin.uclinux.org/gf/project/toolchain/frs There is complete documentation, including "getting started" guides available at: http://docs.blackfin.uclinux.org/ which provides links to the sources and patches you will need in order to set up a cross-compiling environment for bfin-linux-uclibc This patch, as well as the other patches (toolchain, distribution, uClibc) are actively supported by Analog Devices Inc, at: http://blackfin.uclinux.org/ We have tested this on LTP, and our test plan (including pass/fails) can be found at: http://docs.blackfin.uclinux.org/doku.php?id=testing_the_linux_kernel [m.kozlowski@tuxland.pl: balance parenthesis in blackfin header files] Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Aubrey Li <aubrey.li@analog.com> Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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