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* all archs: consolidate init and exit sections in vmlinux.lds.hSam Ravnborg2008-01-28
| | | | | | | | | | | This patch consolidate all definitions of .init.text, .init.data and .exit.text, .exit.data section definitions in the generic vmlinux.lds.h. This is a preparational patch - alone it does not buy us much good. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* [Blackfin] arch: fix bug kernel boot message: memory information is not ↵Yi Li2008-01-27
| | | | | | | | | | | | | | | | | reasonable Some of the information in kernel boot message is not reasonable. http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3846 - use _rambase as the start of kernel image. kernel is in the region [_rambase, _ramstart] - count in pages in per-cpu-page list as available memory - reserved memory now include: [0 - 4K] for bad pointer catching, memory reserved for abnormaly 05000263, memory reserved by kernel itself. Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Fix bug - kernel build with Debug option enabled fails to ↵Michael Hennerich2008-01-22
| | | | | | | | | | boot up writes to I/DMEM_CONTROL must be followed by SSYNC Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Add proper SW System Reset delay sequenceMichael Hennerich2008-01-22
| | | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: GPIO API cleanup and anomaly updateMichael Hennerich2008-01-22
| | | | | | | | | | | | | - Add anomaly workaround for bfin_gpio_reset_spi0_ssel1 - Fix style - Update copyright - Remove BUG_ON checks for functions intended to be used only by arch support. GPIO users should only access using the generic GPIO API - Make all GPIO identifier unsigned int Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Fix BUG gpio_direction_output API is not compatitable with ↵Michael Hennerich2008-01-22
| | | | | | | | GENERIC_GPIO API interface signef-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Initial checkin of the memory protection support.Bernd Schmidt2008-01-27
| | | | | | | | Enable it with CONFIG_MPU. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: set_bfin_dma_config shouldnt set SYNC or RESTART by default ↵Michael Hennerich2008-01-22
| | | | | | | | - add argument or option Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: move all code related to CPLB handling into a new ↵Bernd Schmidt2008-01-11
| | | | | | | | subdirectory under kernel/ Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: print out list of modules if kernel is crashing and tell ↵Robin Getz2008-01-11
| | | | | | | | people if the kernel is tainted Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Don't oops_in_progress if single step is comming from the ↵Robin Getz2008-01-10
| | | | | | | | | | | | kernel Don't oops_in_progress if single step is comming from the kernel, which happens if a single step occurs after a exception cause. This fixes up the remaining issues in the toolchain bug. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Fix BUG - kernel sometimes would stuck with KEYBOARD_GPIO onMichael Hennerich2007-12-24
| | | | | | | | Make sure the SYSTEM reset completes before we issue the CORE reset Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Spelling fixesJoe Perches2007-12-24
| | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: Fix gpio label handlingMichael Hennerich2007-12-24
| | | | | | | | | | | | | early serial init also utilizes the peripheral request api - however at this point bfin_gpio_init didn't allocate memory for the labels. So we always have two zombies (allocated pin functions without labels) This happens before the initcalls - We now allocate memory statically. Define MAX_RESOURCES individually for each cpu. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: add support for BF523/BF524/BF526Mike Frysinger2007-12-24
| | | | | | Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [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: fix bug gdb testing on hardware has regressionRobin Getz2007-12-24
| | | | | | | | | | | | http://blackfin.uclinux.org/gf/project/toolchain/tracker/?action=TrackerItemEdit&tracker_item_id=3651 As Bernd predicted, this was only necessary because of other problems in the kenel - fixing those, and this is not necessary, so remove it. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* [Blackfin] arch: fix bug - trap_tests fails to recover on some tests.Robin Getz2008-01-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3719 When the CPLBs get a miss, we do: - find a victim in the HW table - remove the victim - find the replacement in the software table - put it into the HW table. If we can't find a replacement in the software table, we accidently leave a duplicate in the HW table. This patch ensures that duplicate is marked as not valid. What we should do is find the replacement in the software table, before we find a victim in the HW table - but its too late in the release cycle to do that much restructuring of this code. Rather that duplicate code, connect Hardware Errors (irq5) into trap_c, so user space processes get killed properly. The rest of irq_panic() can be moved into traps.c (later) There is still a small corner case that causes problems when a pheriperal interrupt goes off a single cycle before a user space hardware error. This causes a kernel panic, rather than the user space process being killed. But, this checkin makes things work in 99.9% of the cases, and is a vast improvement from what is there today (which fails 100% of the time). 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: fix bug when sending signals with the wrong PC, cause gdb get ↵Robin Getz2007-11-21
| | | | | | | | | | | confused We need to send signals with the proper PC, or gdb gets confused, and lots of tests fail. This should fix that. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: Ensure we printk out strings with the proper loglevelRobin Getz2007-11-21
| | | | | | Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: cplb and map header file cleanupMike Frysinger2007-11-21
| | | | | | | | | | | | - remove duplicated defines for the BF561 - generalize L2 support (so that it works for BF54x) and mark it executable - add support for reading/executing the Boot ROM sections (since it has data/functions we may need at runtime) - and fixup names for each map Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: cleanup the cplb declaresMike Frysinger2007-11-21
| | | | | | | | | - no need to declare their sizes in the common header - no need to tack on the section attribute as only the definition matters, not references Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: rename _return_from_exception to _bfin_return_from_exception ↵Mike Frysinger2007-11-21
| | | | | | | | and export it Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: move EXPORT_SYMBOL() to C files where the symbol is actually ↵Mike Frysinger2007-11-21
| | | | | | | | defined Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: export symbol get_dma_curr_desc_ptr for driver usageCliff Cai2007-11-21
| | | | | | Signed-off-by: Cliff Cai <cliff.cai@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: cleanup kernel exception message, don't insult the customer.Robin Getz2007-11-17
| | | | | | Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: fix bug kernel not to boot up with mtd filesystemsBernd Schmidt2007-11-17
| | | | | | | | | | | | | | | | Revert this patch: move the init sections to the end of memory, so that after they are free, run time memory is all continugous - this should help decrease memory fragementation. When doing this, we also pack some of the other sections a little closer together, to make sure we don't waste memory. To make this happen, we need to rename the .data.init_task section to .init_task.data, so it doesn't get picked up by the linker script glob. Since it causes the kernel not to boot up with mtd filesystems. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: print out modules that are loaded if we get a kernel oopsRobin Getz2007-11-17
| | | | | | Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: Add assembly function insl_16Michael Hennerich2007-11-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | /* * CPUs often take a performance hit when accessing unaligned memory * locations. The actual performance hit varies, it can be small if the * hardware handles it or large if we have to take an exception and fix * it * in software. * * Since an ethernet header is 14 bytes network drivers often end up * with * the IP header at an unaligned offset. The IP header can be aligned by * shifting the start of the packet by 2 bytes. Drivers should do this * with: * * skb_reserve(NET_IP_ALIGN); * * The downside to this alignment of the IP header is that the DMA is * now * unaligned. On some architectures the cost of an unaligned DMA is high * and this cost outweighs the gains made by aligning the IP header. * * Since this trade off varies between architectures, we allow * NET_IP_ALIGN * to be overridden. */ This new function insl_16 allows to read form 32-bit IO and writes to 16-bit aligned memory. This is useful in above described scenario - In particular with the AXIS AX88180 Gigabit Ethernet MAC. Once the device is in 32-bit mode, reads from the RX FIFO always decrements 4bytes. While on the other side the destination address in SDRAM is always 16-bit aligned. If we use skb_reserve(0) the receive buffer is 32-bit aligned but later we hit a unaligned exception in the IP code. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: use do_div() for the 64bit division as pointed out by BerndMike Frysinger2007-11-22
| | | | | | | | | | If you need a 64 bit divide in the kernel, use asm/div64.h. Revert the addition of udivdi3. Cc: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: unexport get_wchanAdrian Bunk2007-11-17
| | | | | | | | | The only user of get_wchan I was able to find is the proc fs - and proc can't be built modular. Signed-off-by: Adrian Bunk <bunk@kernel.org> 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: move the init sections to the end of memory to help decrease ↵Robin Getz2007-11-15
| | | | | | | | | | | | | | | memory fragementation move the init sections to the end of memory, so that after they are free, run time memory is all continugous - this should help decrease memory fragementation. When doing this, we also pack some of the other sections a little closer together, to make sure we don't waste memory. To make this happen, we need to rename the .data.init_task section to .init_task.data, so it doesn't get picked up by the linker script glob. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: fix bug cplbmgr.S does not exit properly on error conditionRobin Getz2007-11-15
| | | | | | | | | | | | https://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=1685 Ensure that cache/protection is turned back on when we get a fault, and ensure that the initial population of the CPLB tables are correct - that kernel is locked in CPLB tables Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: fix bux - only reset the PC when necessary, otherwise gdb ↵Robin Getz2007-11-12
| | | | | | | | gets confused Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: ensure we work around ANOMALY_05000261 for null pointersRobin Getz2007-11-12
| | | | | | | | We currently do not. Also make it easier to handle cplb violations - in traps.c Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: reclaim a few bytes from the end of our init sectionMike Frysinger2007-10-30
| | | | | | Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: ensure that speculative loads of bad pointers don't cause us ↵Robin Getz2007-10-29
| | | | | | | | | | to do bad things. Fix/change formatting of a few more things. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: Fix random crash issue found by Michael.Robin Getz2007-10-29
| | | | | | | | | | | | | | | This is fixes a problem where we could jump to the wrong address. By doing a "p0 = reti; jump (p0)". If a different, higher level interrupt came in, just before, rather than returning to the calling function, we would return to a random place in the kernel. This very elegant fix from Bernd grabs the return location off the stack, and places it into P0, so when we do a return, it goes to the correct place. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: fix bug: tell users if the kernel is recovering from a fault ↵Robin Getz2007-10-29
| | | | | | | | condition Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: add support for checking/clearing overruns in generic purpose ↵Mike Frysinger2007-10-29
| | | | | | | | Timer API Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: cleanup arch/blackfin/kernel/traps.c handling code.Robin Getz2007-10-29
| | | | | | | | | | | | | | | - move the CONFIG_KGDB into one block, for easier reading - remove printk from printk_address, and pass around buffers. Also print out the labels when decoding CPLB errors, so you know exactly where the error was. - Do not use fixed addresses, becuase people do not know where they come from. - Turn the printing level down on the dump, so if you don't want, only the signal prints out - just like on other archs. If a kernel/interrupt crashes, it should dump everything all the time Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* Blackfin arch: fix bug: kernel prints out error message twiceRobin Getz2007-10-29
| | | | | | | | | | | | | This fixes two things: - stop calling write_lock_irq/write_unlock_irq which can turn modify irq levels - don't calling mmput when handing exceptions - since this might_sleep, which does a rti, and leaves us in kernel space (irq15, rather than irq5). Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* blackfin: fix sg falloutAdrian Bunk2007-10-24
| | | | | Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
* Merge branch 'for-linus' of ↵Linus Torvalds2007-10-22
|\ | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: Blackfin arch: use KBUILD_CFLAGS and KBUILD_AFLAGS in Makefile Blackfin arch: Javier Herrer writes: fix building when icache and dcache is disabled
| * Blackfin arch: Javier Herrer writes: fix building when icache and dcache is ↵Mike Frysinger2007-10-21
| | | | | | | | | | | | | | | | disabled Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* | Update arch/ to use sg helpersJens Axboe2007-10-22
|/ | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Blackfin arch: dma add some API and cleanup bf54x DMA definitionBryan Wu2007-10-21
| | | | | Signed-off-by: Bryan Wu <bryan.wu@analog.com>
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