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* Blackfin arch: Fix Bug - System with EMAC driver enabled - Core not idlingMichael Hennerich2008-08-06
| | | | | | | | | | | | - Disable all bits in SIC_IWR unless we are going into a real (DPMC) power saving mode. Any Interrupt can wake the core form it's idle state. - Remove deep sleep mode as it is not going to be used anywhere: We support sleep, sleep deeper and hibernate. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: delete unused cache functionsMike Frysinger2008-08-13
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: convert L2 defines to be the same as the L1 definesMike Frysinger2008-08-13
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: unify the duplicated portions of __start and split ↵Mike Frysinger2008-08-06
| | | | | | | | mach-specific pieces into _mach_early_start where they will be easier to trim over time Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: add asm/thread_info.h for THREAD_SIZE defineMike Frysinger2008-08-06
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: move async memory programming into common setup_arch() as the ↵Mike Frysinger2008-08-06
| | | | | | | | banks dont really need to be setup fully as early as head.S Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: make sure the BSS and kernel load address are 4 byte alignedMike Frysinger2008-08-06
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: unify the duplicated _real_start functionsMike Frysinger2008-08-06
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: remove support for Anomaly 05000125 as it doesnt exist on any ↵Mike Frysinger2008-08-06
| | | | | | | | supported processor/silicon Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: Fix bugs - Make kgdb code apparent to app debugging.Sonic Zhang2008-08-05
| | | | | | | | | | | - Skip single step if global interrupt disable bit is set. - Extend bernds' patch r4673 to skip single step in any interrupt entry that interrupts the code which is under single stepping. Bernds' patch only allow user space single stepping. Singed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: use symbolic IRQ_PF define rather than hardcodedMike Frysinger2008-08-05
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: remove pata resources from generic boardMike Frysinger2008-08-05
| | | | | | | | these are highly board specific, so putting into generic doesnt make much sense Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: add support for board tcm-bf537Mike Frysinger2008-08-13
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: add board resources for parallel flash on cm-bf537Mike Frysinger2008-08-05
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: be consistant with parition names, and ensure the bus is ↵Robin Getz2008-08-05
| | | | | | | | identified Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: Functional power management supportMichael Hennerich2008-08-05
| | | | | | | | | Merge VR Regulator Hibernate wakeups into set_irq_wake for internal interrupts. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: Fix bug - This change eliminates impact on application debuggingJie Zhang2008-08-05
| | | | | | Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2008-07-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: (30 commits) Blackfin arch: If we double fault, rather than hang forever, reset Blackfin arch: When icache is off, make sure people know it Blackfin arch: Fix bug - skip single step in high priority interrupt handler instead of disabling all interrupts in single step debugging. Blackfin arch: cache the values of vco/sclk/cclk as the overhead of doing so (~24 bytes) is worth avoiding the software mult/div routines Blackfin arch: fix bug - IMDMA is not type struct dma_register Blackfin arch: check the EXTBANKS field of the DDRCTL1 register to see if we are using both memory banks Blackfin arch: Apply Bluetechnix CM-BF527 board support patch Blackfin arch: Add unwinding for stack info, and a little more detail on trace buffer Blackfin arch: Add ISP1760 board resources to BF548-EZKIT Blackfin arch: fix bug - detect 0.1 silicon revision BF527-EZKIT as 0.0 version Blackfin arch: add missing IORESOURCE_MEM flags to UART3 Blackfin arch: Add return value check in bfin_sir_probe(), remove SSYNC(). Blackfin arch: Extend sram malloc to handle L2 SRAM. Blackfin arch: Remove useless config option. Blackfin arch: change L1 malloc to base on slab cache and lists. Blackfin arch: use local labels and ENDPROC() markings Blackfin arch: Do not need this dualcore test module in kernel. Blackfin arch: Allow ptrace to peek and poke application data in L1 data SRAM. Blackfin arch: Add ANOMALY_05000368 workaround Blackfin arch: Functional power management support ...
| * Blackfin arch: If we double fault, rather than hang forever, resetRobin Getz2008-07-26
| | | | | | | | | | | | Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: When icache is off, make sure people know itRobin Getz2008-07-26
| | | | | | | | | | | | Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Fix bug - skip single step in high priority interrupt handler ↵Sonic Zhang2008-07-26
| | | | | | | | | | | | | | | | | | | | | | instead of disabling all interrupts in single step debugging. Skip single step if event priority of current instruction is higher than that of the first instruction, from which gdb starts single step. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: cache the values of vco/sclk/cclk as the overhead of doing so ↵Mike Frysinger2008-07-26
| | | | | | | | | | | | | | | | (~24 bytes) is worth avoiding the software mult/div routines Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: fix bug - IMDMA is not type struct dma_registerMichael Hennerich2008-07-26
| | | | | | | | | | | | | | | | TEMP Workaround - avoid access to PERIPHERAL_MAP Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: check the EXTBANKS field of the DDRCTL1 register to see if we ↵Mike Frysinger2008-07-26
| | | | | | | | | | | | | | | | are using both memory banks Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Apply Bluetechnix CM-BF527 board support patchMichael Hennerich2008-07-19
| | | | | | | | | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Add unwinding for stack info, and a little more detail on ↵Robin Getz2008-07-26
| | | | | | | | | | | | | | | | trace buffer Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Add ISP1760 board resources to BF548-EZKITMichael Hennerich2008-07-26
| | | | | | | | | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: add missing IORESOURCE_MEM flags to UART3Mike Frysinger2008-07-19
| | | | | | | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Extend sram malloc to handle L2 SRAM.Sonic Zhang2008-07-19
| | | | | | | | | | | | | | | | | | | | | | | | Extend system call to alloc L2 SRAM in application. Automatically move following sections to L2 SRAM: 1. kernel built-in l2 attribute section 2. kernel module l2 attribute section 3. elf-fdpic application l2 attribute section Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Remove useless config option.Robin Getz2008-07-19
| | | | | | | | | | | | Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: change L1 malloc to base on slab cache and lists.Sonic Zhang2008-07-19
| | | | | | | | | | | | | | | | | | Remove the sram piece limitation and improve the performance to alloc/free sram piece data. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: use local labels and ENDPROC() markingsMike Frysinger2008-07-16
| | | | | | | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Do not need this dualcore test module in kernel.Yi Li2008-07-19
| | | | | | | | | | | | Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Allow ptrace to peek and poke application data in L1 data SRAM.Jie Zhang2008-07-15
| | | | | | | | | | | | Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Add ANOMALY_05000368 workaroundMichael Hennerich2008-07-16
| | | | | | | | | | | | | | | | Possible RETS Register Corruption when Subroutine Is under 5 Cycles in Duration Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Functional power management supportMichael Hennerich2008-07-19
| | | | | | | | | | | | | | | | | | | | Enable: PM_SUSPEND_MEM -> Blackfin Hibernate to SDRAM This feature requires a special bootloader (u-boot) supporting return from hibernate. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Fix BUG - JUMP error in kernel (relocation truncated to fit: ↵Michael Hennerich2008-07-15
| | | | | | | | | | | | | | | | | | | | R_pcrel12_jump_s) Use long jump Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: set CROSS_COMPILE in our arch Makefile so it gets used by defaultMike Frysinger2008-07-14
| | | | | | | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: update board defconfigsSonic Zhang2008-07-26
| | | | | | | | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Remove redundant kernel optionMichael Hennerich2008-07-14
| | | | | | | | | | | | | | | | | | use kernel command line mem and max_mem bootargs to limit availabe memory instead. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: use the symbolic IRQ define rather than the backend numberMike Frysinger2008-07-14
| | | | | | | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Fix bug - Kernel does not boot if re-program clocksMichael Hennerich2008-07-14
| | | | | | | | | | | | | | | | | | | | Don't write conflicting data to EBIU_SDBCTL after the SDRAM is configured. This can cause data corruption, since we might change SDRAM row and column addressing modes. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Fix bug - do not overflow the buffer given to us which tends ↵Mike Frysinger2008-07-14
| | | | | | | | | | | | | | | | to happen when CONFIG_L1_MAX_PIECE is increased past its default Singed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: Fix Bug - GPIO interrupts not disabled; edge sensitive ↵Michael Hennerich2008-07-14
| | | | | | | | | | | | | | | | | | | | interrupt hang system. - Implement irq_chip.enable and irq_chip.disable Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
| * Blackfin arch: use the generic platform nand driver to support nand flash on ↵Mike Frysinger2008-06-24
| | | | | | | | | | | | | | | | bf53x board which do not have on-chip nand flash controller Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* | blackfin: use generic show_mem()Johannes Weiner2008-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove arch-specific show_mem() in favor of the generic version. This also removes the following redundant information display: - free pages, printed by show_free_areas() - pages in swapcache, printed by show_swap_cache_info() where show_mem() calls show_free_areas(), which calls show_swap_cache_info(). Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Acked-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'timers-fixes-for-linus' of ↵Linus Torvalds2008-07-24
|\ \ | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: nohz: adjust tick_nohz_stop_sched_tick() call of s390 as well nohz: prevent tick stop outside of the idle loop
| * \ Merge branch 'linus' into timers/nohzIngo Molnar2008-07-18
| |\ \
| * | | 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>
* | | | remove mention of CONFIG_KMOD from documentationJohannes Berg2008-07-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also includes a few Kconfig files (xtensa, blackfin) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: linux-doc@vger.kernel.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Randy Dunlap <rdunlap@xenotime.net>
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