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author | Michael Ellerman <michael@ellerman.id.au> | 2005-07-07 17:56:29 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-07 18:23:41 -0700 |
commit | c66d5dd6b5b62e1435b95c0fb42f6bcddeb395ea (patch) | |
tree | bb7a7241f07b1f7c75101469f87e2485f486e592 /arch/ppc64/kernel/idle.c | |
parent | d200903e11f6867b91dffa81b2038e55be599f49 (diff) | |
download | blackbird-op-linux-c66d5dd6b5b62e1435b95c0fb42f6bcddeb395ea.tar.gz blackbird-op-linux-c66d5dd6b5b62e1435b95c0fb42f6bcddeb395ea.zip |
[PATCH] ppc64: Move pSeries idle functions into pSeries_setup.c
dedicated_idle() and shared_idle() are only used by pSeries, so move them into
pSeries_setup.c
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/ppc64/kernel/idle.c')
-rw-r--r-- | arch/ppc64/kernel/idle.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/arch/ppc64/kernel/idle.c b/arch/ppc64/kernel/idle.c index 226152467791..69b7c22bad54 100644 --- a/arch/ppc64/kernel/idle.c +++ b/arch/ppc64/kernel/idle.c @@ -74,137 +74,6 @@ int default_idle(void) return 0; } -#ifdef CONFIG_PPC_PSERIES - -DECLARE_PER_CPU(unsigned long, smt_snooze_delay); - -int dedicated_idle(void) -{ - long oldval; - struct paca_struct *lpaca = get_paca(), *ppaca; - unsigned long start_snooze; - unsigned long *smt_snooze_delay = &__get_cpu_var(smt_snooze_delay); - unsigned int cpu = smp_processor_id(); - - ppaca = &paca[cpu ^ 1]; - - while (1) { - /* - * Indicate to the HV that we are idle. Now would be - * a good time to find other work to dispatch. - */ - lpaca->lppaca.idle = 1; - - oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED); - if (!oldval) { - set_thread_flag(TIF_POLLING_NRFLAG); - start_snooze = __get_tb() + - *smt_snooze_delay * tb_ticks_per_usec; - while (!need_resched() && !cpu_is_offline(cpu)) { - /* - * Go into low thread priority and possibly - * low power mode. - */ - HMT_low(); - HMT_very_low(); - - if (*smt_snooze_delay == 0 || - __get_tb() < start_snooze) - continue; - - HMT_medium(); - - if (!(ppaca->lppaca.idle)) { - local_irq_disable(); - - /* - * We are about to sleep the thread - * and so wont be polling any - * more. - */ - clear_thread_flag(TIF_POLLING_NRFLAG); - - /* - * SMT dynamic mode. Cede will result - * in this thread going dormant, if the - * partner thread is still doing work. - * Thread wakes up if partner goes idle, - * an interrupt is presented, or a prod - * occurs. Returning from the cede - * enables external interrupts. - */ - if (!need_resched()) - cede_processor(); - else - local_irq_enable(); - } else { - /* - * Give the HV an opportunity at the - * processor, since we are not doing - * any work. - */ - poll_pending(); - } - } - - clear_thread_flag(TIF_POLLING_NRFLAG); - } else { - set_need_resched(); - } - - HMT_medium(); - lpaca->lppaca.idle = 0; - schedule(); - if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING) - cpu_die(); - } - return 0; -} - -static int shared_idle(void) -{ - struct paca_struct *lpaca = get_paca(); - unsigned int cpu = smp_processor_id(); - - while (1) { - /* - * Indicate to the HV that we are idle. Now would be - * a good time to find other work to dispatch. - */ - lpaca->lppaca.idle = 1; - - while (!need_resched() && !cpu_is_offline(cpu)) { - local_irq_disable(); - - /* - * Yield the processor to the hypervisor. We return if - * an external interrupt occurs (which are driven prior - * to returning here) or if a prod occurs from another - * processor. When returning here, external interrupts - * are enabled. - * - * Check need_resched() again with interrupts disabled - * to avoid a race. - */ - if (!need_resched()) - cede_processor(); - else - local_irq_enable(); - } - - HMT_medium(); - lpaca->lppaca.idle = 0; - schedule(); - if (cpu_is_offline(smp_processor_id()) && - system_state == SYSTEM_RUNNING) - cpu_die(); - } - - return 0; -} - -#endif /* CONFIG_PPC_PSERIES */ - int native_idle(void) { while(1) { |