Commit Graph

14 Commits

Author SHA1 Message Date
Wu Zhangjin 1d84267480 MIPS: Oprofile: Fixup of loongson2_exit()
When exiting from loongson2_exit(), we need to reset the counter
register too, this patch adds a function reset_counters() to do it, by
the way, this function will be shared by Perf.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1199/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-07-05 17:17:31 +01:00
Wu Zhangjin 893556e602 MIPS: Oprofile: Loongson: Cleanup the comments
Removes some out-of-date comments and empty lines.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1204/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-05-21 21:31:19 +01:00
Wu Zhangjin 852151bdb9 MIPS: Oprofile: Loongson: Cleanup of the macros
The _EXL, _KERNEL etc. bits are in the performance control register so
use _PERFCTRL prefix instead of _PERFCNT.  While at it make the macro
more readable, use _ENABLE instead of _INT_EN suffix to describe the
interrupt enable bit.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1203/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-05-21 21:31:19 +01:00
Wu Zhangjin 6d8c2873e0 MIPS: Oprofile: Loongson: Remove unused variable from loongson2_cpu_setup()
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1202/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-05-21 21:31:19 +01:00
Wu Zhangjin c838abc511 MIPS: Oprofile: Loongson: Remove useless parentheses
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1201/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-05-21 21:31:18 +01:00
Wu Zhangjin 86e5a52021 MIPS: Oprofile: Loongson: Unify macro for setting events
Unified macro for counter0 and counter1 to set the event in the control
register.  This will be needed by Perf.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1200/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-05-21 21:31:18 +01:00
Wu Zhangjin 4e73238d16 MIPS: Oprofile: Fix Loongson irq handler
The interrupt enable bit for the performance counters is in the Control
    Register $24, not in the counter register.
    loongson2_perfcount_handler(), we need to use
    
    Reported-by: Xu Hengyang <hengyang@mail.ustc.edu.cn>
    Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
    Cc: linux-mips@linux-mips.org
    Patchwork: http://patchwork.linux-mips.org/patch/1198/
    Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

---
2010-05-15 21:59:54 +01:00
Ralf Baechle f1d39e6ed7 MIPS: Loongson: Remove pointless sample_lock from oprofile code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-02-27 12:53:39 +01:00
Ralf Baechle 4a8a738de6 MIPS: Make various locks static.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-02-27 12:53:30 +01:00
Wu Zhangjin f7a904dffe MIPS: Loongson: Change the Email address of Wu Zhangjin
Currently wuzj@lemote.com is not usable; change it to wuzhangjin@gmail.com.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/829/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-02-27 12:53:12 +01:00
Wu Zhangjin 937893cf5b MIPS: oprofile: Only do performance counter handling for counter interrupts
In Loongson2f IP6 is shared by bonito and perfcounters so we need to avoid
do_IRQ for perfcounter when the interrupt is from bonito.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-12-17 01:57:10 +00:00
Wu Zhangjin 55f4e1d4fe MIPS: Oprofile: Rename cpu_type from godson2 to loongson2
Unify the naming method between kernel and the user-space oprofile tool.
Because loongson is used instead of godson in most of the places, we agreed
to use loongson instead, which will simplify future maintenance.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Acked-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-11-02 12:00:08 +01:00
Uwe Kleine-König 8813d33ee0 MIPS: Loongson2: Fix typo "enalbe" -> "enable"
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Yanhua <yanh@lemote.com>
Cc: Robert Richter <robert.richter@amd.com>
Acked-by: Wu Zhangjin <wuzj@lemote.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-09-30 21:46:59 +02:00
Wu Zhangjin 67b35e5d01 MIPS: Loongson: Add oprofile support
This kernel support is needed by the user-space tool:oprofile to profile
linux kernel or applications via loongson2 performance counters. you can
enable this driver via CONFIG_OPROFILE = y or m.

On Loongson2 there are two performance counters, each one can count 16
events respectively. when anyone of the performance counter overflows, an
interrupt will be generated and is routed to the IRQ MIPS_CPU_IRQ_BASE + 6.

Signed-off-by: Yanhua <yanh@lemote.com>
Signed-off-by: Wu Zhangjin <wuzj@lemote.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-09-17 20:07:47 +02:00