diff options
Diffstat (limited to 'arch/sparc64/kernel/smp.c')
| -rw-r--r-- | arch/sparc64/kernel/smp.c | 124 |
1 files changed, 47 insertions, 77 deletions
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index b4fc6a5462b..6efc03df51c 100644 --- a/arch/sparc64/kernel/smp.c +++ b/arch/sparc64/kernel/smp.c @@ -39,7 +39,6 @@ #include <asm/starfire.h> #include <asm/tlb.h> -extern int linux_num_cpus; extern void calibrate_delay(void); /* Please don't make this stuff initdata!!! --DaveM */ @@ -93,6 +92,27 @@ void __init smp_store_cpu_info(int id) cpu_data(id).pte_cache[1] = NULL; cpu_data(id).pgd_cache = NULL; cpu_data(id).idle_volume = 1; + + cpu_data(id).dcache_size = prom_getintdefault(cpu_node, "dcache-size", + 16 * 1024); + cpu_data(id).dcache_line_size = + prom_getintdefault(cpu_node, "dcache-line-size", 32); + cpu_data(id).icache_size = prom_getintdefault(cpu_node, "icache-size", + 16 * 1024); + cpu_data(id).icache_line_size = + prom_getintdefault(cpu_node, "icache-line-size", 32); + cpu_data(id).ecache_size = prom_getintdefault(cpu_node, "ecache-size", + 4 * 1024 * 1024); + cpu_data(id).ecache_line_size = + prom_getintdefault(cpu_node, "ecache-line-size", 64); + printk("CPU[%d]: Caches " + "D[sz(%d):line_sz(%d)] " + "I[sz(%d):line_sz(%d)] " + "E[sz(%d):line_sz(%d)]\n", + id, + cpu_data(id).dcache_size, cpu_data(id).dcache_line_size, + cpu_data(id).icache_size, cpu_data(id).icache_line_size, + cpu_data(id).ecache_size, cpu_data(id).ecache_line_size); } static void smp_setup_percpu_timer(void); @@ -147,6 +167,9 @@ void __init smp_callin(void) rmb(); cpu_set(cpuid, cpu_online_map); + + /* idle thread is expected to have preempt disabled */ + preempt_disable(); } void cpu_panic(void) @@ -818,43 +841,29 @@ void smp_flush_tlb_all(void) * questionable (in theory the big win for threads is the massive sharing of * address space state across processors). */ + +/* This currently is only used by the hugetlb arch pre-fault + * hook on UltraSPARC-III+ and later when changing the pagesize + * bits of the context register for an address space. + */ void smp_flush_tlb_mm(struct mm_struct *mm) { - /* - * This code is called from two places, dup_mmap and exit_mmap. In the - * former case, we really need a flush. In the later case, the callers - * are single threaded exec_mmap (really need a flush), multithreaded - * exec_mmap case (do not need to flush, since the caller gets a new - * context via activate_mm), and all other callers of mmput() whence - * the flush can be optimized since the associated threads are dead and - * the mm is being torn down (__exit_mm and other mmput callers) or the - * owning thread is dissociating itself from the mm. The - * (atomic_read(&mm->mm_users) == 0) check ensures real work is done - * for single thread exec and dup_mmap cases. An alternate check might - * have been (current->mm != mm). - * Kanoj Sarcar - */ - if (atomic_read(&mm->mm_users) == 0) - return; - - { - u32 ctx = CTX_HWBITS(mm->context); - int cpu = get_cpu(); + u32 ctx = CTX_HWBITS(mm->context); + int cpu = get_cpu(); - if (atomic_read(&mm->mm_users) == 1) { - mm->cpu_vm_mask = cpumask_of_cpu(cpu); - goto local_flush_and_out; - } + if (atomic_read(&mm->mm_users) == 1) { + mm->cpu_vm_mask = cpumask_of_cpu(cpu); + goto local_flush_and_out; + } - smp_cross_call_masked(&xcall_flush_tlb_mm, - ctx, 0, 0, - mm->cpu_vm_mask); + smp_cross_call_masked(&xcall_flush_tlb_mm, + ctx, 0, 0, + mm->cpu_vm_mask); - local_flush_and_out: - __flush_tlb_mm(ctx, SECONDARY_CONTEXT); +local_flush_and_out: + __flush_tlb_mm(ctx, SECONDARY_CONTEXT); - put_cpu(); - } + put_cpu(); } void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long *vaddrs) @@ -862,34 +871,13 @@ void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long u32 ctx = CTX_HWBITS(mm->context); int cpu = get_cpu(); - if (mm == current->active_mm && atomic_read(&mm->mm_users) == 1) { + if (mm == current->active_mm && atomic_read(&mm->mm_users) == 1) mm->cpu_vm_mask = cpumask_of_cpu(cpu); - goto local_flush_and_out; - } else { - /* This optimization is not valid. Normally - * we will be holding the page_table_lock, but - * there is an exception which is copy_page_range() - * when forking. The lock is held during the individual - * page table updates in the parent, but not at the - * top level, which is where we are invoked. - */ - if (0) { - cpumask_t this_cpu_mask = cpumask_of_cpu(cpu); - - /* By virtue of running under the mm->page_table_lock, - * and mmu_context.h:switch_mm doing the same, the - * following operation is safe. - */ - if (cpus_equal(mm->cpu_vm_mask, this_cpu_mask)) - goto local_flush_and_out; - } - } - - smp_cross_call_masked(&xcall_flush_tlb_pending, - ctx, nr, (unsigned long) vaddrs, - mm->cpu_vm_mask); + else + smp_cross_call_masked(&xcall_flush_tlb_pending, + ctx, nr, (unsigned long) vaddrs, + mm->cpu_vm_mask); -local_flush_and_out: __flush_tlb_pending(ctx, nr, vaddrs); put_cpu(); @@ -980,13 +968,6 @@ void smp_penguin_jailcell(int irq, struct pt_regs *regs) preempt_enable(); } -extern unsigned long xcall_promstop; - -void smp_promstop_others(void) -{ - smp_cross_call(&xcall_promstop, 0, 0, 0); -} - #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier #define prof_counter(__cpu) cpu_data(__cpu).counter @@ -1170,20 +1151,9 @@ void __init smp_cpus_done(unsigned int max_cpus) (bogosum/(5000/HZ))%100); } -/* This needn't do anything as we do not sleep the cpu - * inside of the idler task, so an interrupt is not needed - * to get a clean fast response. - * - * XXX Reverify this assumption... -DaveM - * - * Addendum: We do want it to do something for the signal - * delivery case, we detect that by just seeing - * if we are trying to send this to an idler or not. - */ void smp_send_reschedule(int cpu) { - if (cpu_data(cpu).idle_volume == 0) - smp_receive_signal(cpu); + smp_receive_signal(cpu); } /* This is a nop because we capture all other cpus |