diff options
Diffstat (limited to 'arch/blackfin/mach-common/smp.c')
| -rw-r--r-- | arch/blackfin/mach-common/smp.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c index 9f251406a76a..8bce5ed031e4 100644 --- a/arch/blackfin/mach-common/smp.c +++ b/arch/blackfin/mach-common/smp.c @@ -40,6 +40,10 @@ */ struct corelock_slot corelock __attribute__ ((__section__(".l2.bss"))); +#ifdef CONFIG_ICACHE_FLUSH_L1 +unsigned long blackfin_iflush_l1_entry[NR_CPUS]; +#endif + void __cpuinitdata *init_retx_coreb, *init_saved_retx_coreb, *init_saved_seqstat_coreb, *init_saved_icplb_fault_addr_coreb, *init_saved_dcplb_fault_addr_coreb; @@ -108,6 +112,19 @@ static void ipi_flush_icache(void *info) blackfin_dcache_invalidate_range((unsigned long)fdata, (unsigned long)fdata + sizeof(*fdata)); + /* Make sure all write buffers in the data side of the core + * are flushed before trying to invalidate the icache. This + * needs to be after the data flush and before the icache + * flush so that the SSYNC does the right thing in preventing + * the instruction prefetcher from hitting things in cached + * memory at the wrong time -- it runs much further ahead than + * the pipeline. + */ + SSYNC(); + + /* ipi_flaush_icache is invoked by generic flush_icache_range, + * so call blackfin arch icache flush directly here. + */ blackfin_icache_flush_range(fdata->start, fdata->end); } @@ -244,12 +261,13 @@ int smp_call_function(void (*func)(void *info), void *info, int wait) { cpumask_t callmap; + preempt_disable(); callmap = cpu_online_map; cpu_clear(smp_processor_id(), callmap); - if (cpus_empty(callmap)) - return 0; + if (!cpus_empty(callmap)) + smp_send_message(callmap, BFIN_IPI_CALL_FUNC, func, info, wait); - smp_send_message(callmap, BFIN_IPI_CALL_FUNC, func, info, wait); + preempt_enable(); return 0; } @@ -286,12 +304,13 @@ void smp_send_stop(void) { cpumask_t callmap; + preempt_disable(); callmap = cpu_online_map; cpu_clear(smp_processor_id(), callmap); - if (cpus_empty(callmap)) - return; + if (!cpus_empty(callmap)) + smp_send_message(callmap, BFIN_IPI_CPU_STOP, NULL, NULL, 0); - smp_send_message(callmap, BFIN_IPI_CPU_STOP, NULL, NULL, 0); + preempt_enable(); return; } @@ -361,8 +380,6 @@ void __cpuinit secondary_start_kernel(void) */ init_exception_vectors(); - bfin_setup_caches(cpu); - local_irq_disable(); /* Attach the new idle task to the global mm. */ @@ -381,6 +398,8 @@ void __cpuinit secondary_start_kernel(void) local_irq_enable(); + bfin_setup_caches(cpu); + /* * Calibrate loops per jiffy value. * IRQs need to be enabled here - D-cache can be invalidated |