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* | Blackfin: simplify PTRACE_{PEEK,POKE}USR in preperation for regset supportMike Frysinger2010-03-09
| | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: simplify SYSCFG code a bit and ignore attempts to change itMike Frysinger2010-03-09
| | | | | | | | | | | | | | | | We don't want to let user space modify the SYSCFG register arbitrarily as the settings are system wide (SNEN/CNEN) and can cause misbehavior. The only other bit here (SSSTEP) has proper controls via PTRACE_SINGLESTEP. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: use generic ptrace_resume codeChristoph Hellwig2010-03-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the generic ptrace_resume code for PTRACE_SYSCALL, PTRACE_CONT, PTRACE_KILL and PTRACE_SINGLESTEP. This implies defining arch_has_single_step in <asm/ptrace.h> and implementing the user_enable_single_step and user_disable_single_step functions, which also causes the breakpoint information to be cleared on fork, which could be considered a bug fix. Also the TIF_SYSCALL_TRACE thread flag is now cleared on PTRACE_KILL which it previously wasn't which is consistent with all architectures using the modern ptrace code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: rewrite resync_core_{i,d}cache() SMP logic to avoid per_cpu dataGraf Yang2010-03-09
| | | | | | | | | | | | | | | | | | | | | | This functions are implicitly called by core functions like cpu_relax(), and since those functions may be called early on before common code has initialized the per-cpu data area, we need to tweak the stats gathering. Now the statistics are maintained in common bss which makes these funcs safe to use as soon as the C runtime env is setup. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: add support for cpufreq on SMP systemsGraf Yang2010-03-09
| | | | | | | | | | Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: split watchdog definitions into a dedicated header fileGraf Yang2010-03-09
| | | | | | | | | | | | | | This allows things to be shared between the different watchdog sources. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: support new ftrace frame pointer semanticsMike Frysinger2010-03-09
| | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: implement ftrace mcount testMike Frysinger2010-03-09
| | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: implement nmi_watchdog for SMP on BF561Graf Yang2010-03-09
| | | | | | | | | | Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: respect the L1 kconfig optimization in the MPU codeBarry Song2010-03-09
| | | | | | | | | | | | | | Restore support for CONFIG_EXCPT_IRQ_SYSC_L1 in the MPU CPLB manager. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: fill out the signal si_addr when sending a SIGBUS/SIGSEGVBarry Song2010-03-09
| | | | | | | | | | | | | | | | | | Some userspace applications use this member in diagnosing crashes. It also makes some LTP tests pass (i.e. the Blackfin arch behaves more like everyone else). Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: fix up mm locking in address dumpingGraf Yang2010-03-09
| | | | | | | | | | | | | | | | | | | | The locking code in the address dumper needs to grab the mm's mmap_sem so that other CPUs do not get an inconsistent view. On UP systems this really wasn't a problem, but it is easy to trigger a race on SMP systems when another CPU removes a mapping. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: kgdb: mark all local funcs/structs staticMike Frysinger2010-03-09
| | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: fix decoding of opcodes 41-47 in decode_instruction()Roel Kluin2010-03-09
| | | | | | | | | | | | | | This condition allowed only decoding of opcode 0x0040 Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: initial XIP supportBarry Song2010-03-09
| | | | | | | | | | Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: fix the section name of init_thread_unionBarry Song2010-03-09
| | | | | | | | | | | | | | | | Use the common attribute rather than setting the section name directly. The common linker script defines expect the newer naming. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: replace harcoded define with proper THREAD_SIZE macroBarry Song2010-03-09
| | | | | | | | | | Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: fix relocation errors with large initramfs imagesJie Zhang2010-03-09
| | | | | | | | | | | | | | | | | | | | | | | | Since we are now discarding .exit.text at runtime instead of link time, we need to place all .text sections ahead of the .data sections. Otherwise, a really large attached initramfs may cause link errors as it pushes the PC relative relocations behind the limits of the Blackfin ISA (~16meg). The instructions in the .exit.text are unable to call back into the .text sections leading to a link failure. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: SMP: make core timers per-cpu clock events for HRTYi Li2010-03-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SMP systems require per-cpu local clock event devices in order to enable HRT support. One a BF561, we can use local core timer for this purpose. Originally, there was one global core-timer clock event device set up for core A. To accomplish this feat, we need to split the gptimer0/core timer logic so that each is a standalone clock event. There is no requirement that we only have one clock event source anyways. Once we have this, we just define per-cpu clock event devices for each local core timer. Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: gpio: use shorter nameMichael Hennerich2010-03-09
| | | | | | | | | | | | | | | | | | The gpio label size is 16 char, but the current code uses a longer name resulting in chopped display. So use a shorter name. Reported-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: dma-mapping: fix thinko in constant optimizationSonic Zhang2010-03-09
| | | | | | | | | | | | | | | | Make sure the non-constant version of the dma_sync functions actually complete instead of recursively calling itself forever. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: MPU: handle caches for reserved memorySonic Zhang2010-03-09
| | | | | | | | | | | | | | | | | | We weren't handling the user-specified cache behavior for the reserved memory regions (via mem=/max_mem=). The no-MPU code already takes care of this, so add support to the MPU code as well. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: fix MPU page permission masks overflow when dealing with async memoryBarry Song2010-03-09
| | | | | | | | | | | | | | | | | | | | | | | | | | Attempting to use the MPU while doing XIP out of parallel flash hooked up to the async memory bus would often result in random crashes as the MPU slowly corrupted memory. The fallout here is that the async banks gain MPU protection from user space too. So any accesses have to go through the mmap() interface rather than just using hardcoded pointers. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | Blackfin: allow boards to register early devicesSonic Zhang2010-03-09
|/ | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* blackfin,kgdb: Do not put PC in gdb_regs into retx.Sonic Zhang2010-01-07
| | | | | | | | | | 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>
* blackfin,kgdb,probe_kernel: Cleanup probe_kernel_read/writeJason Wessel2010-01-07
| | | | | | | | | | | | | | | | | 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>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-12-16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * Blackfin: drop duplicate sched_clockMike Frysinger2009-12-15
| | | | | | | | | | | | | | | | 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>
| * Blackfin: NOMPU: skip DMA ICPLB hole when it is redundantMike Frysinger2009-12-15
| | | | | | | | | | | | | | | | | | | | 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>
| * Blackfin: MPU: add missing __init markingsMike Frysinger2009-12-15
| | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: add support for TIF_NOTIFY_RESUMEBarry Song2009-12-15
| | | | | | | | | | Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: kgdb_test: clean up code a bitMike Frysinger2009-12-15
| | | | | | | | | | | | | | | | | | - document simple global symbols - convert printk to pr_* - clean up spurious whitespace - use min_t() Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: convert kgdbtest to proc_fopsAlexey Dobriyan2009-12-15
| | | | | | | | | | | | | | | | 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>
| * Blackfin: convert cyc2ns() to clocksource_cyc2ns()Mike Frysinger2009-12-15
| | | | | | | | | | | | The former no longer exists. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: dma-mapping.h: flesh out missing DMA mapping functionsBarry Song2009-12-15
| | | | | | | | | | Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: workaround anomaly 05000310Barry Song2009-12-15
| | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * Blackfin: drop ptrace() write support for fixed code/bootromMike Frysinger2009-12-15
| | | | | | | | | | | | | | | | 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>
| * Blackfin: MPU: support XIP in async flash memoryBarry Song2009-12-15
| | | | | | | | | | | | | | | | 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>
| * Blackfin: drop 4KB reserve at end of memoryBarry Song2009-12-15
| | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * Blackfin: support smaller uncached DMA chunks for memory constrained systemsBarry Song2009-12-15
| | | | | | | | | | | | | | | | | | 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>
| * Blackfin: finish_atomic_sections: optimize the RTS stepMike Frysinger2009-12-15
| | | | | | | | | | | | | | 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>
| * Blackfin: kgdb: punt dead codeSonic Zhang2009-12-15
| | | | | | | | | | | | | | 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>
| * Blackfin: reject NULL callback in set_dma_callback()Mike Frysinger2009-12-15
| | | | | | | | | | | | It makes no sense to call this function with a NULL callback. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: gptimers: use unsigned timer/group idsMike Frysinger2009-12-15
| | | | | | | | | | | | | | | | 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>
| * Blackfin: don't walk VMAs when oopsingRobin Getz2009-12-15
| | | | | | | | | | | | | | | | | | | | 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>
| * Blackfin/ipipe: prepare status bitops for SMP supportPhilippe Gerum2009-12-15
| | | | | | | | | | | | Signed-off-by: Philippe Gerum <rpm@xenomai.org> Signed-off-by: Li Yi <yi.li@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: don't give CPU its own line in traps outputMike Frysinger2009-12-15
| | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: announce current cpu rev when bootingRobin Getz2009-12-15
| | | | | | | | | | | | | | | | User reports rarely include full information, so include this important tidbit up front. It's also good to know at a glance in general. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: convert DMA mutex to an atomic and drop redundant codeMike Frysinger2009-12-15
| | | | | | | | | | | | | | | | | | | | | | The DMA channel status field was encoding redundant info wrt the DMA MMR config register, and it was doing an incomplete job of checking all DMA channels (some drivers write directly to the config register). So drop the tristate field in favor of a binary atomic field. This simplifies the code in general, removes the implicit need for sleeping, and forces the suspend code to handle all channels properly. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * Blackfin: push down asm/ includes and out of bfin-global.hMike Frysinger2009-12-15
| | | | | | | | | | | | | | Avoid including unnecessary headers all the time as well as circular includes with core requirements. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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