diff options
author | Ben Dooks <ben-linux@fluff.org> | 2008-08-08 21:10:12 +0100 |
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committer | Ben Dooks <ben-linux@fluff.org> | 2008-08-08 21:10:12 +0100 |
commit | af7a535688a758d15f06a98833e6a143b29af9de (patch) | |
tree | bac5ab210bbbbe276f0e44ed84194d7c8bb16aae /arch/x86/mach-voyager | |
parent | 0c17e4ceedd35c78b1c7413dbd16279a350be6bc (diff) | |
parent | c41107c2d4fd31924533f4dbc4c3428acc2b5894 (diff) |
Merge http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm into for-rmk
Diffstat (limited to 'arch/x86/mach-voyager')
-rw-r--r-- | arch/x86/mach-voyager/voyager_smp.c | 98 |
1 files changed, 19 insertions, 79 deletions
diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c index 8dedd01e909..ee0fba09215 100644 --- a/arch/x86/mach-voyager/voyager_smp.c +++ b/arch/x86/mach-voyager/voyager_smp.c @@ -950,94 +950,24 @@ static void smp_stop_cpu_function(void *dummy) halt(); } -static DEFINE_SPINLOCK(call_lock); - -struct call_data_struct { - void (*func) (void *info); - void *info; - volatile unsigned long started; - volatile unsigned long finished; - int wait; -}; - -static struct call_data_struct *call_data; - /* execute a thread on a new CPU. The function to be called must be * previously set up. This is used to schedule a function for * execution on all CPUs - set up the function then broadcast a * function_interrupt CPI to come here on each CPU */ static void smp_call_function_interrupt(void) { - void (*func) (void *info) = call_data->func; - void *info = call_data->info; - /* must take copy of wait because call_data may be replaced - * unless the function is waiting for us to finish */ - int wait = call_data->wait; - __u8 cpu = smp_processor_id(); - - /* - * Notify initiating CPU that I've grabbed the data and am - * about to execute the function - */ - mb(); - if (!test_and_clear_bit(cpu, &call_data->started)) { - /* If the bit wasn't set, this could be a replay */ - printk(KERN_WARNING "VOYAGER SMP: CPU %d received call funtion" - " with no call pending\n", cpu); - return; - } - /* - * At this point the info structure may be out of scope unless wait==1 - */ irq_enter(); - (*func) (info); + generic_smp_call_function_interrupt(); __get_cpu_var(irq_stat).irq_call_count++; irq_exit(); - if (wait) { - mb(); - clear_bit(cpu, &call_data->finished); - } } -static int -voyager_smp_call_function_mask(cpumask_t cpumask, - void (*func) (void *info), void *info, int wait) +static void smp_call_function_single_interrupt(void) { - struct call_data_struct data; - u32 mask = cpus_addr(cpumask)[0]; - - mask &= ~(1 << smp_processor_id()); - - if (!mask) - return 0; - - /* Can deadlock when called with interrupts disabled */ - WARN_ON(irqs_disabled()); - - data.func = func; - data.info = info; - data.started = mask; - data.wait = wait; - if (wait) - data.finished = mask; - - spin_lock(&call_lock); - call_data = &data; - wmb(); - /* Send a message to all other CPUs and wait for them to respond */ - send_CPI(mask, VIC_CALL_FUNCTION_CPI); - - /* Wait for response */ - while (data.started) - barrier(); - - if (wait) - while (data.finished) - barrier(); - - spin_unlock(&call_lock); - - return 0; + irq_enter(); + generic_smp_call_function_single_interrupt(); + __get_cpu_var(irq_stat).irq_call_count++; + irq_exit(); } /* Sorry about the name. In an APIC based system, the APICs @@ -1094,6 +1024,12 @@ void smp_qic_call_function_interrupt(struct pt_regs *regs) smp_call_function_interrupt(); } +void smp_qic_call_function_single_interrupt(struct pt_regs *regs) +{ + ack_QIC_CPI(QIC_CALL_FUNCTION_SINGLE_CPI); + smp_call_function_single_interrupt(); +} + void smp_vic_cpi_interrupt(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); @@ -1114,6 +1050,8 @@ void smp_vic_cpi_interrupt(struct pt_regs *regs) smp_enable_irq_interrupt(); if (test_and_clear_bit(VIC_CALL_FUNCTION_CPI, &vic_cpi_mailbox[cpu])) smp_call_function_interrupt(); + if (test_and_clear_bit(VIC_CALL_FUNCTION_SINGLE_CPI, &vic_cpi_mailbox[cpu])) + smp_call_function_single_interrupt(); set_irq_regs(old_regs); } @@ -1129,7 +1067,7 @@ static void do_flush_tlb_all(void *info) /* flush the TLB of every active CPU in the system */ void flush_tlb_all(void) { - on_each_cpu(do_flush_tlb_all, 0, 1, 1); + on_each_cpu(do_flush_tlb_all, 0, 1); } /* send a reschedule CPI to one CPU by physical CPU number*/ @@ -1161,7 +1099,7 @@ int safe_smp_processor_id(void) /* broadcast a halt to all other CPUs */ static void voyager_smp_send_stop(void) { - smp_call_function(smp_stop_cpu_function, NULL, 1, 1); + smp_call_function(smp_stop_cpu_function, NULL, 1); } /* this function is triggered in time.c when a clock tick fires @@ -1848,5 +1786,7 @@ struct smp_ops smp_ops = { .smp_send_stop = voyager_smp_send_stop, .smp_send_reschedule = voyager_smp_send_reschedule, - .smp_call_function_mask = voyager_smp_call_function_mask, + + .send_call_func_ipi = native_send_call_func_ipi, + .send_call_func_single_ipi = native_send_call_func_single_ipi, }; |