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2008-07-19Blackfin arch: Extend sram malloc to handle L2 SRAM.Sonic Zhang
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>
2008-07-18Merge branch 'linus' into timers/nohzIngo Molnar
2008-07-18nohz: prevent tick stop outside of the idle loopThomas Gleixner
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>
2008-07-19Blackfin arch: Do not need this dualcore test module in kernel.Yi Li
Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-15Blackfin arch: Allow ptrace to peek and poke application data in L1 data SRAM.Jie Zhang
Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-16Blackfin arch: Add ANOMALY_05000368 workaroundMichael Hennerich
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>
2008-07-19Blackfin arch: Functional power management supportMichael Hennerich
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>
2008-07-15Blackfin arch: Fix BUG - JUMP error in kernel (relocation truncated to fit: ↵Michael Hennerich
R_pcrel12_jump_s) Use long jump Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-14Blackfin arch: Remove redundant kernel optionMichael Hennerich
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>
2008-06-25Blackfin arch: fix up section mismatch warningBryan Wu
-- WARNING: vmlinux.o(.text+0x721a): Section mismatch in reference from the function ___fill_code_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_code_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_code_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x7238): Section mismatch in reference from the function ___fill_code_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_code_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_code_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x7250): Section mismatch in reference from the function ___fill_code_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_code_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_code_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x7264): Section mismatch in reference from the function ___fill_code_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_code_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_code_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x72a2): Section mismatch in reference from the function ___fill_data_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_data_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_data_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x72bc): Section mismatch in reference from the function ___fill_data_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_data_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_data_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x72d4): Section mismatch in reference from the function ___fill_data_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_data_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_data_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x72e8): Section mismatch in reference from the function ___fill_data_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_data_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_data_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. -- Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-06-25Blackfin arch: fix bug - kernel boot fails when Spinlock and rw-lock ↵Sonic Zhang
debugging enabled Initialize the lock of bad_irq_desc properly. The content of irq_desc array is replaced by bad_irq_desc in blackfin arch irqchip init code. So, do it properly as common irq init code. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-06-03Blackfin arch: fixup warnings with the new cplb saved valuesMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-20Blackfin arch: Cleanup no functional changesMichael Hennerich
Singed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-19Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: [PATCH] return to old errno choice in mkdir() et.al. [Patch] fs/binfmt_elf.c: fix wrong return values [PATCH] get rid of leak in compat_execve() [Patch] fs/binfmt_elf.c: fix a wrong free [PATCH] avoid multiplication overflows and signedness issues for max_fds [PATCH] dup_fd() part 4 - race fix [PATCH] dup_fd() - part 3 [PATCH] dup_fd() part 2 [PATCH] dup_fd() fixes, part 1 [PATCH] take init_files to fs/file.c
2008-05-17Blackfin arch: IO Port functions to read/write unalligned memoryMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-17Blackfin arch: cleanup the icplb/dcplb multiple hit checksMike Frysinger
so that we always send the same signal and we handle the NULL ptr condition properly Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-17Blackfin arch: Add workaround to read edge triggered GPIOsMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-17Blackfin arch: Check for Anomaly 05000182Michael Hennerich
IMDMA does not operate to full speed for 600MHz and higher devices Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-16[PATCH] take init_files to fs/file.cAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-05-07[Blackfin] arch: fix bug - Remove module will not free L1 memory usedMeihui Fan
Remove module will not free L1 memory used which caused by memory access after free. This patch fixes it. Signed-off-by: Meihui Fan <mhfan@hhcn.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: fix wrong header name in commentMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: disable single stepping when delivering a signalBernd Schmidt
When delivering a signal, disable single stepping but call ptrace_notify if it was enabled before. The idea was taken from the x86 port. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: Delete unused (copied from m68k) entries in asm-offsets.c.Bernd Schmidt
Fix some really ancient code that was correct only for the m68k port. Delete unused (i.e. copied from m68k) entries in asm-offsets.c. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: Support for CPU_FREQ and NOHZVitja Makarov
Singed-off-by: Vitja Makarov <vitja.makarov@gmail.com>
2008-05-07[Blackfin] arch: fix bug - breaking the atomic sections code.Bernd Schmidt
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>
2008-05-03unified (weak) sys_pipe implementationUlrich Drepper
This replaces the duplicated arch-specific versions of "sys_pipe()" with one unified implementation. This removes almost 250 lines of duplicated code. It's marked __weak, so that *if* an architecture wants to override the default implementation it can do so by simply having its own replacement version, since many architectures use alternate calling conventions for the 'pipe()' system call for legacy reasons (ie traditional UNIX implementations often return the two file descriptors in registers) I still haven't changed the cris version even though Linus says the BKL isn't needed. The arch maintainer can easily do it if there are really no obstacles. Signed-off-by: Ulrich Drepper <drepper@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29blackfin: use kbuild.h instead of defining macros in asm-macros.cChristoph Lameter
Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29Remove the macro get_personalityWANG Cong
Remove the macro get_personality, use ->personality instead. Cc: Christoph Hellwig <hch@infradead.org Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: David Howells <dhowells@redhat.com> Cc: Bryan Wu <bryan.wu@analog.com> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-25[Blackfin] arch: Functional power management support: Add support for cpu ↵Michael Hennerich
frequency scaling Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: take DDR DEVWD into consideration as well for BF548Michael Hennerich
Pointed-out-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: Remove the circular buffering mechanism for exceptionsBernd Schmidt
Remove the circular buffering mechanism for exceptions. Instead, point RETX at a safe location from which to fetch three NOPs. This safe location is now in the fixed code area, and also used for certain anomaly workarounds, to ensure that user space can find a valid ICPLB when things are built with CONFIG_MPU. Also, save I/DCPLB_FAULT_ADDRESS when lowering to level 5, since the hardware reg is valid only at exception level. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: lose unnecessary dependency on CONFIG_BFIN_ICACHE for MPUBernd Schmidt
Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: fix bug - before assign new channel to the map register, ↵Graf Yang
need clear the bits first. http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=2445 Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: add Blackfin on-chip SIR IrDA driver supportGraf Yang
- add platform device resources in board files - add new bfin_sir.h to each machines Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: BF54x memsizes are in mbits, not mbytesMike Frysinger
Pointed-out-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: try to remove condition that causes double fault, by ↵Robin Getz
checking current before it gets dereferenced Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: Allow concurrent use of GPIO and GPIO IRQMichael Hennerich
The irq setup code no longer calls gpio request and free. This patch also changes the default gpio_free behavior on Blackfin. A freed GPIO keeps it's last state, and is not defaulted back to an input. This is also what all other architectures do. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: detect the memory available in the system on the fly by defaultMike Frysinger
detect the memory available in the system on the fly by default rather than forcing people to set this manually in the kconfig Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: add implicit icplb for the bootrom so we can use the ↵Mike Frysinger
utility functions in the kernel Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: use the same style for missing L1 sectionsMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: now that we can panic() early, dont need the delayed L1 ↵Mike Frysinger
overflow check Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: fix bug - Section data_l1_cacheline_aligned should be ↵Sonic Zhang
defined in link script of kernel http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3978 Section data_l1_cacheline_aligned should be defined in link script of kernel, when L1 data sram bank A is not available. In bf536 with all data cache is enabled, there is no L1 data sram. Current link script won't define section data_l1.cacheline_aligned in this case. But, if user select put cacheline_aligned data into l1 sram in kernel menuconfig, these data will be dropped and access to these data will trigger data CPLB exception. Do panic in l1 relocation code as well. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: Add a little bit more runtime info for MPURobin Getz
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: cplb-mpu code clean upMike Frysinger
- allow bootrom to be readable from supervisor mode - delete unused local variable "addr" - punt unused local defines of cplbinfo.c Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: Give the DMA base registers a more descriptive nameBernd Schmidt
The DMA base registers are available in a global named "base_addr" for every Blackfin variant. Give this a more descriptive name, and remove duplicate tables from some drivers. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: actually implement get_cycles functionMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: add boot messages to quickly distinguish between MPU/NOMPU ↵Mike Frysinger
settings Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: theres no need to declare ram{end,start,base} in the head.S ↵Mike Frysinger
files theres no need to declare ram{end,start,base} in the head.S files when declaring them with the other memory related variables in setup.c is so much simpler/nicer Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: remove duplicated prototypes for internal cplb structures ↵Mike Frysinger
from the global blackfin header remove duplicated prototypes for internal cplb structures from the global blackfin header as nothing else should be accessing these Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: declare list of peripherals as const since we dont modify ↵Mike Frysinger
the incoming array Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
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