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* Blackfin: document the lsl variants of the L1 allocatorMike Frysinger2009-06-121-0/+4
| | | | | | | Make sure the meaning of "lsl" is covered somewhere and it is clear why we somewhat duplicate the sram alloc/free functions. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: rename Blackfin relocs according to the toolchainMike Frysinger2009-06-122-53/+53
| | | | | | | | The latest Blackfin toolchain has fixed its relocation scheme to match other ports: always use R_BFIN_ prefix and capitalize everything. This brings the kernel in line with those fixes. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: check SIC defines rather than variant namesMike Frysinger2009-06-121-9/+8
| | | | | | | | Rather than having to maintain a hard coded list of Blackfin variants, use the SIC defines themselves. This fixes build problems on BF51x/BF538 under some configurations as they were missing from one of the lists. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: add SSYNC to set_dma_sg() for descriptor fetchingSonic Zhang2009-06-121-1/+7
| | | | | | | | Make sure the internal core buffers are flushed before telling the DMA engine to fetch the descriptor structure so that it gets the right values. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: convert SMP to only use generic time frameworkGraf Yang2009-06-122-34/+20
| | | | | Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: bf548-ezkit/bf537-stamp: add resources for ADXL345/346Michael Hennerich2009-06-122-10/+117
| | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: override default uClinux MTD addr/sizeMike Frysinger2009-06-121-4/+7
| | | | | | | | | | Due to a processor anomaly (05000263 to be exact), most Blackfin parts cannot keep the embedded filesystem image directly after the kernel in RAM. Instead, the filesystem needs to be relocated to the end of memory. As such, we need to tweak the map addr/size during boot for Blackfin systems. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: fix command line corruption with DEBUG_DOUBLEFAULTMike Frysinger2009-06-121-8/+8
| | | | | | | | Commit 6b3087c6 (which introduced Blackfin SMP) broke command line passing when the DEBUG_DOUBLEFAULT config option was enabled. Switch the code to using a scratch register and not R7 which holds the command line. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: fix handling of initial L1 reservationGraf Yang2009-06-121-2/+10
| | | | | | | | This restores some L1 reservation logic that was lost during the Blackfin SMP merge. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: merge sram init functionsGraf Yang2009-06-123-11/+4
| | | | | | | | | Now that the sram_init() function exists only to call the bfin_sram_init() after the punting of the reserve_pda() function, simply merge the two to avoid pointless overhead. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: drop unused reserve_pda() functionGraf Yang2009-06-123-15/+0
| | | | | | | | The Per-processor Data Area isn't actually reserved by this function, and all it ended up doing was issuing a printk(), so punt it. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: update gptimers APIMichael Hennerich2009-06-122-24/+49
| | | | | | | | | | | First we fix the prototypes for functions that return boolean values by using "int" rather than "uint16_t". Then we introduce a get_gptimer_run() function for checking the current run status of a timer, and then we add a disable_gptimers_sync() function which parallels disable_gptimers() with corresponding normal "_sync" behavior. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: include system/processor info in dump messagesRobin Getz2009-06-121-0/+23
| | | | | | | | | People often copy & paste crash messages without surrounding context, so include common useful information like system/processor stats in the crash summary. This should smooth over the report/test cycle a bit more. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: add workaround for anomaly 05000461Robin Getz2009-06-121-0/+3
| | | | | | | Returning too fast with a bad RETI can trigger false errors. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: make sure stack is accessible before dumping itRobin Getz2009-06-121-0/+11
| | | | | | | | When displaying a crash dump, make sure accessing the stack is safe so we don't crash at the same time. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: make deferred hardware errors more exactRobin Getz2009-06-124-21/+170
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hardware errors on the Blackfin architecture are queued by nature of the hardware design. Things that could generate a hardware level queue up at the system interface and might not process until much later, at which point the system would send a notification back to the core. As such, it is possible for user space code to do something that would trigger a hardware error, but have it delay long enough for the process context to switch. So when the hardware error does signal, we mistakenly evaluate it as a different process or as kernel context and panic (erp!). This makes it pretty difficult to find the offending context. But wait, there is good news somewhere. By forcing a SSYNC in the interrupt entry, we force all pending queues at the system level to be processed and all hardware errors to be signaled. Then we check the current interrupt state to see if the hardware error is now signaled. If so, we re-queue the current interrupt and return thus allowing the higher priority hardware error interrupt to process properly. Since we haven't done any other context processing yet, the right context will be selected and killed. There is still the possibility that the exact offending instruction will be unknown, but at least we'll have a much better idea of where to look. The downside of course is that this causes system-wide syncs at every interrupt point which results in significant performance degradation. Since this situation should not occur in any properly configured system (as hardware errors are triggered by things like bad pointers), make it a debug configuration option and disable it by default. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: add note about anomaly 05000242 being worked aroundMike Frysinger2009-06-121-0/+1
| | | | | | Document anomaly 05000242 workaround in source code. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: work around anomaly 05000220Graf Yang2009-06-123-23/+43
| | | | | | | | | When possible, work around anomaly 05000220 (external memory is write back cached, but L2 is not cached). If not possible, detect the conditions at build time and reject any qualifying configurations. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: rename some Blackfin driversMike Frysinger2009-06-1214-45/+45
| | | | | | | | Try to keep the naming conventions consistent, so: SPI_ADC_BF533 -> BFIN_SPI_ADC TWI_LCD -> BFIN_TWI_LCD Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: make sure MPU CPLB for first 1k is marked as validRobin Getz2009-06-121-1/+1
| | | | | | | This way we properly catch and kill applications that jump to a NULL ptr. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: add workaround for anomaly 05000287Graf Yang2009-06-121-1/+8
| | | | | Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: add support for gptimer0 as a tick sourceGraf Yang2009-06-1214-74/+228
| | | | | | | | For systems where the core cycles are not a usable tick source (like SMP or cycles gets updated), enable gptimer0 as an alternative. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: annotate anomaly 05000120Graf Yang2009-06-121-0/+4
| | | | | | | Add some notes for anomaly 05000120 to make sure we work around it. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: BF518F-EZBRD: handle required portmuxing of async pinsGraf Yang2009-06-122-1/+14
| | | | | | | | | The two high address lines on the BF51x are not dedicated which means we need to handle them like any other peripheral pin if we want to access the upper 2MB of parallel flash. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: detect anomaly 05000274Sonic Zhang2009-06-122-8/+4
| | | | | | | | Detect and reject operating conditions for anomaly 05000274 since the problem cannot be worked around in software. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: do not append newlines to panic() messagesMike Frysinger2009-06-123-7/+7
| | | | | | The panic() function already handles newlines for us. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: workaround anomaly 05000227Mike Frysinger2009-06-121-7/+11
| | | | | | | | Workaround anomaly 05000227 by only using the scratch pad for stack when absolutely necessary. The core code which reprograms clocks really only touches MMRs directly with constants. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: delete unused sys_getpagesize() functionMike Frysinger2009-06-121-5/+0
| | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: work around anomaly 05000287Graf Yang2009-06-121-1/+8
| | | | | | | | Make sure we work around anomaly 05000287 by configuring different port preferences for the data cache. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: punt useless GPIO init callMike Frysinger2009-06-121-9/+0
| | | | | | This init code existed only to dump a printk(), and not even a useful one. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: annotate anomaly 05000119 in core DMA codeRobin Getz2009-06-121-0/+5
| | | | | | | Add a reminder note to avoid the DMA_DONE bit in our DMA core code. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: document anomaly 05000234 workaroundRobin Getz2009-06-121-2/+2
| | | | | | | Note the reason for using CHIPD over DSPID. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: fix early L1 relocation crashRobin Getz2009-06-123-23/+111
| | | | | | | | | | | | | | Our early L1 relocate code may implicitly call code which lives in L1 memory. This is due to the dma_memcpy() rewrite that made the DMA code lockless and safe to be used by multiple processes. If we start the early DMA memcpy to relocate things into L1 instruction but then our DMA memcpy code calls a function that lives in L1, things fall apart. As such, create a small dedicated DMA memcpy routine that we can assume sanity at boot time. Reported-by: Filip Van Rillaer <filip.vanrillaer@oneaccess-net.com> Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: add MDMA defines to make cross-variant coding easierGraf Yang2009-06-125-19/+200
| | | | | | | | Add some defines to make the BF538/BF561 look like most other Blackfin parts in that it has a MDMA0 channel available for low level init. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: fix detection of cached L2 SRAMMike Frysinger2009-06-121-0/+5
| | | | | | | Make sure our bfin_addr_dcachable() function flags cached L2 SRAM properly else memory easily goes unflushed when working with DMA. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: simplify BF561 coreb driver greatlyMike Frysinger2009-06-122-378/+33
| | | | | | | Since 90% of this driver can be handled in user space, move it to the corebld user space application. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: update defconfigsSonic Zhang2009-06-1221-825/+1164
| | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: simplify the do_flush macroMike Frysinger2009-06-121-15/+15
| | | | | | | | Simplify the do_flush macro now that we don't need to take into account a second instruction being used together. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: set bf51x/bf52x to 0.0 rev by default and bf54x to 0.2Mike Frysinger2009-06-121-2/+2
| | | | | | | | Update the default revs based on what we actually support (bf54x-0.[01] is too broken to use). Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: do not error if GPIO IRQ is requested already as GPIOMichael Hennerich2009-06-121-9/+0
| | | | | | | | | Some drivers expect to be able to request both as GPIO and GPIO IRQ, so allow that use case. 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>
* Blackfin: pull updated anomaly lists from toolchainMike Frysinger2009-06-127-137/+367
| | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: fix up PATA resource handling in bf537-stampMichael Hennerich2009-06-121-6/+9
| | | | | | | | | Make sure the addresses declared match reality, and make the PATA IRQ code optional. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: merge Philippe's recent ipipe patchPhilippe Gerum2009-06-123-12/+8
| | | | | | | | | ipipe-2.6.28.9-blackfin-git95aafe6.patch Singed-off-by: Philippe Gerum <rpm@xenomai.org> Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: fix warnings with I/O port macrosMike Frysinger2009-06-121-13/+16
| | | | | | | | The I/O port functions take ints, so we need to cast them up before passing to our read/write funcs to avoid ugly messes of warnings. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: fix parentheses balance and convert some tab/space mixingMariusz Kozlowski2009-06-121-3/+3
| | | | | | Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: fix bug found by traps test case 21Graf Yang2009-06-121-1/+1
| | | | | | | | | | The traps test case 21 "exception 0x3f: l1_instruction_access" would make the kernel panic on BF533's because we end up calling show_stack() infinitely. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: fix data cache flushing when doing icache flushingMike Frysinger2009-06-123-36/+16
| | | | | | | | | | | Make sure we flush all data caches and their write buffers before flushing icache, otherwise random edge cases could crop up where stale data is read into icache from external memory. As fallout, punt the combined icache + dcache flush function since we cannot safely do them back to back -- the SSYNC is needed between the dcache flush and the icache flush. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: fix link failure due to CONFIG_EXCEPTION_L1_SCRATCHGraf Yang2009-06-123-20/+13
| | | | | | | | | Move exception stack mess from entry.S to init.c to fix link failure when CONFIG_EXCEPTION_L1_SCRATCH is in use. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: allow scheduler functions to be placed into L1Robin Getz2009-06-121-0/+5
| | | | | | Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin: Allow bf548 ATAPI to be routed to GPIOSonic Zhang2009-06-122-19/+52
| | | | | | | | | By default, it is routed to async memory address. In GPIO case, GPIO peripheral PINs should be requested in advance. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>