- 04 4月, 2009 1 次提交
-
-
由 Michael Trimarchi 提交于
There were a number of issues with the DSP context save/restore code, mostly left-over relics from when it was introduced on SH3-DSP with little follow-up testing, resulting in things like task_pt_dspregs() referencing incorrect state on the stack. This follows the MIPS convention of tracking the DSP state in the thread_struct and handling the state save/restore in switch_to() and finish_arch_switch() respectively. The regset interface is also updated, which allows us to finally be rid of task_pt_dspregs() and the special cased task_pt_regs(). Signed-off-by: NMichael Trimarchi <michael@evidence.eu.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 22 12月, 2008 5 次提交
-
-
由 Paul Mundt 提交于
This can use the same implementation as sh64, the generated assembly is the same between the new and old version, so there is not much point in leaving it open coded in inline assembly. This is preparatory work for future consolidation of the _32/_64 variants. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Description snipped from Steven Rostedt's PPC patch: When idle is called, interrupts are blocked, but the idle function will still wake up on an interrupt. The problem is that the interrupt disabled latency tracer will take this call to idle as a latency. This patch disables the latency tracing when going into idle. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
This implements a simple show_code() that is in turn plugged in to show_regs() to provide minimal code dumping at the end of the trace. Built on top of a simple instruction disassembler derived from the binutils opcode table. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 21 9月, 2008 2 次提交
-
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
This implements a few trace points across events that are deemed interesting. This implements a number of trace points: - The page fault handler / TLB miss - IPC calls - Kernel thread creation The original LTTng patch had the slow-path instrumented, which fails to account for the vast majority of events. In general placing this in the fast-path is not a huge performance hit, as we don't take page faults for kernel addresses. The other bits of interest are some of the other trap handlers, as well as the syscall entry/exit (which is better off being handled through the tracehook API). Most of the other trap handlers are corner cases where alternate means of notification exist, so there is little value in placing extra trace points in these locations. Based on top of the points provided both by the LTTng instrumentation patch as well as the patch shipping in the ST-Linux tree, albeit in a stripped down form. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 08 9月, 2008 2 次提交
-
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 28 7月, 2008 1 次提交
-
-
由 Adrian Bunk 提交于
This patch contains the following cleanups: - make the following needlessly global code static: - cf-enabler.c: cf_init() - cpu/clock.c: __clk_enable() - cpu/clock.c: __clk_disable() - process_32.c: default_idle() - time_32.c: struct clocksource_sh - timers/timer-tmu.c: struct tmu_timer_ops - remove the following unused functions (no CONFIG_BLK_DEV_FD on sh): - process_{32,64}.c: disable_hlt() - process_{32,64}.c: enable_hlt() Signed-off-by: NAdrian Bunk <bunk@kernel.org> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 19 7月, 2008 1 次提交
-
-
由 Thomas Gleixner 提交于
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: Neric miao <eric.y.miao@gmail.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
-
- 26 3月, 2008 1 次提交
-
-
由 Paul Mundt 提交于
Presently with preempt enabled there's the possibility to be preempted after the TIF_USEDFPU test and the register save, leading to bogus state post-__switch_to(). Use an explicit preempt_disable()/enable() pair around unlazy_fpu()/clear_fpu() to avoid this. Follows the x86 change. Reported-by: NTakuo Koguchi <takuo.koguchi.sw@hitachi.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 28 1月, 2008 4 次提交
-
-
由 Stuart Menefy 提交于
This implements kernel-level atomic rollback built on top of gUSA, as an alternative non-IRQ based atomicity method. This is generally a faster method for platforms that are lacking the LL/SC pairs that SH-4A and later use, and is only supportable on legacy cores. Signed-off-by: NStuart Menefy <stuart.menefy@st.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 20 10月, 2007 1 次提交
-
-
由 Alexey Dobriyan 提交于
One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: NAlexey Dobriyan <adobriyan@openvz.org> Signed-off-by: NPavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 28 9月, 2007 2 次提交
-
-
由 Paul Mundt 提交于
This conditionalizes gUSA support. gUSA is not supported on SMP configurations, and it's not necessary there anyways due to having other atomicity options (ie, movli.l/movco.l). Anything implementing the LL/SC semantics (all SH-4A CPUs) can switch to userspace atomicity implementations without requiring gUSA. This is left default-enabled on all UP so that glibc doesn't break. Those that know what they are doing can disable this explicitly. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 31 7月, 2007 1 次提交
-
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 26 7月, 2007 1 次提交
-
-
由 David McCullough 提交于
Do not follow the frame pointers (/proc/X/task/1/stat) unless we were compiled with them. Signed-off-by: NDavid McCullough <david_mccullough@au.securecomputing.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 11 6月, 2007 1 次提交
-
-
由 Paul Mundt 提交于
SH-2 can presently get in to some pretty bogus states, so we tidy up the dependencies a bit and get it all building again. This gets us a bit closer to a functional allyesconfig and allmodconfig, though there are still a few things to fix up. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 08 6月, 2007 2 次提交
-
-
由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
This adds in some more __user annotations. These weren't being handled properly in some of the __get_user and __put_user paths, so tidy those up. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 21 5月, 2007 1 次提交
-
-
由 Paul Mundt 提交于
As pointed out by Saito-san, without the sr.bl manipulation we can occasionally hit delays in the idle loop due to interrupt handling, so ensure that interrupts are blocked before going to sleep. At the same time, we throw in TIF_POLLING_NRFLAG for the !hlt_counter case (primarily used by the ST-40 parts). Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 09 5月, 2007 5 次提交
-
-
由 Paul Mundt 提交于
This adds basic support for clockevents and clocksources, presently only implemented for TMU-based systems (which are the majority of SH-3 and SH-4 systems). The old NO_IDLE_HZ implementation is also dropped completely, the only users of this were on TMU-based systems anyways. More work needs to be done to generalize the TMU handling, in that the current implementation is rather tied to the notion of TMU0 and TMU1 utilization. Additionally, as more SH timers switch over to this scheme, we'll be able to gut most of the remaining system timer infrastructure that existed before. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
This went in immediately after SH added the die chain notifiers, so move over to that instead.. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
There are a few different cases for figuring out how to size the instruction. We read in the instruction located at regs->pc - 4 when rewinding the opcode to figure out if there's a 32-bit opcode before the faulting instruction, with a default of a - 2 adjustment on a mismatch. In practice this works for the cases where pc - 4 is just another 16-bit opcode, or we happen to have a 32-bit and a 16-bit immediately preceeding the pc value. In the cases where we aren't rewinding, this is much less ugly.. We also don't bother fixing up the places where we're explicitly dealing with 16-bit instructions, since this might lead to confusion regarding the encoding size possibilities on other CPU variants. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
SH-2A supports both 16 and 32-bit instructions, add a simple helper for figuring out the instruction size in the places where there are hardcoded 16-bit assumptions. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
This moves SH over to the generic quicklists. As per x86_64, we have special mappings for the PGDs, so these go on their own list.. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 07 5月, 2007 2 次提交
-
-
由 Paul Mundt 提交于
Add the atomic die chains in, kprobes needs these. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Nobuhiro Iwamatsu 提交于
Support the SH7712 (SH3-DSP) Solution Engine reference board. Signed-off-by: NNobuhiro Iwamatsu <iwamatsu@nigauri.org> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 05 3月, 2007 1 次提交
-
-
由 Hideo Saito 提交于
When I run a preemptive kernel-2.6.20 for SH7780, a created kthread(pdflush) can not exit by do_exit() in kernel_thread_helper. I think that the created kthread should have a room for 'struct pt_regs' space on the stack top, because __switch_to() will refer to the space as follows using 'regs = task_pt_regs(prev)' and next condition may be true. Signed-off-by: NHideo Saito <saito@densan.co.jp> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 13 2月, 2007 3 次提交
-
-
由 Paul Mundt 提交于
There are a lot of bogus cpu_data-> references that only end up working for the boot CPU, convert these to current_cpu_data to fixup SMP. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Previously this was implemented using a global cache, cache this per-CPU instead and bump up the number of context IDs to match NR_CPUS. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
This rips out most of the needlessly complicated sh_bios and kgdb trap handling, and forces it all through a common fast dispatch path. As more debug traps are inserted, it's important to keep them in sync for all of the parts, not just SH-3/4. As the SH-2 parts are unable to do traps in the >= 0x40 range, we restrict the debug traps to the 0x30-0x3f range on all parts, and also bump the kgdb breakpoint trap down in to this range (from 0xff to 0x3c) so it's possible to use for nommu. Optionally, this table can be padded out to catch spurious traps for SH-3/4, but we don't do that yet.. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 12 12月, 2006 2 次提交
-
-
由 Paul Mundt 提交于
Some time ago the schedule frame size changed and we failed to reflect this in get_wchan() at the time. This first popped up as a problem on SH7751R where schedule_frame ended up being unaligned and generating an unaligned trap. This fixes it up again.. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
由 Paul Mundt 提交于
Previously we haven't been doing anything with verbose BUG() reporting, and we've been relying on the oops path for handling BUG()'s, which is rather sub-optimal. This switches BUG handling to use a fixed trapa vector (#0x3e) where we construct a small bug frame post trapa instruction to get the context right. This also makes it trivial to wire up a DIE_BUG for the atomic die chain, which we couldn't really do before. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-
- 06 12月, 2006 1 次提交
-
-
由 Stuart Menefy 提交于
This fixes up the kernel for gcc4. The existing exception handlers needed some wrapping for pt_regs access, acessing the registers via a RELOC_HIDE() pointer. The strcpy() issues popped up here too, so add -ffreestanding and kill off the symbol export. Signed-off-by: NStuart Menefy <stuart.menefy@st.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
-