#include <linux/sched.h>
#include <linux/cpumask.h>
#include <linux/cpu.h>
+#include <linux/err.h>
#include <asm/atomic.h>
#include <asm/cpu.h>
#include <asm/system.h>
#include <asm/mmu_context.h>
#include <asm/smp.h>
+#include <asm/time.h>
#ifdef CONFIG_MIPS_MT_SMTC
#include <asm/mipsmtregs.h>
EXPORT_SYMBOL(phys_cpu_present_map);
EXPORT_SYMBOL(cpu_online_map);
-static void smp_tune_scheduling (void)
-{
- struct cache_desc *cd = ¤t_cpu_data.scache;
- unsigned long cachesize; /* kB */
- unsigned long cpu_khz;
-
- /*
- * Crude estimate until we actually meassure ...
- */
- cpu_khz = loops_per_jiffy * 2 * HZ / 1000;
-
- /*
- * Rough estimation for SMP scheduling, this is the number of
- * cycles it takes for a fully memory-limited process to flush
- * the SMP-local cache.
- *
- * (For a P5 this pretty much means we will choose another idle
- * CPU almost always at wakeup time (this is due to the small
- * L1 cache), on PIIs it's around 50-100 usecs, depending on
- * the cache size)
- */
- if (!cpu_khz)
- return;
-
- cachesize = cd->linesz * cd->sets * cd->ways;
-}
-
extern void __init calibrate_delay(void);
-extern ATTRIB_NORET void cpu_idle(void);
+extern void cpu_idle(void);
/*
* First C code run on the secondary CPUs after being started up by
* the master.
*/
-asmlinkage void start_secondary(void)
+asmlinkage __cpuinit void start_secondary(void)
{
unsigned int cpu;
cpu_probe();
cpu_report();
per_cpu_trap_init();
+ mips_clockevent_init();
prom_init_secondary();
/*
/*
* Run a function on all other CPUs.
+ *
+ * <mask> cpuset_t of all processors to run the function on.
* <func> The function to run. This must be fast and non-blocking.
* <info> An arbitrary pointer to pass to the function.
* <retry> If true, keep retrying until ready.
* Spin waiting for call_lock
* Deadlock Deadlock
*/
-int smp_call_function (void (*func) (void *info), void *info, int retry,
- int wait)
+int smp_call_function_mask(cpumask_t mask, void (*func) (void *info),
+ void *info, int retry, int wait)
{
struct call_data_struct data;
- int i, cpus = num_online_cpus() - 1;
int cpu = smp_processor_id();
+ int cpus;
/*
* Can die spectacularly if this CPU isn't yet marked online
*/
BUG_ON(!cpu_online(cpu));
+ cpu_clear(cpu, mask);
+ cpus = cpus_weight(mask);
if (!cpus)
return 0;
spin_lock(&smp_call_lock);
call_data = &data;
- mb();
+ smp_mb();
/* Send a message to all other CPUs and wait for them to respond */
- for_each_online_cpu(i)
- if (i != cpu)
- core_send_ipi(i, SMP_CALL_FUNCTION);
+ core_send_ipi_mask(mask, SMP_CALL_FUNCTION);
/* Wait for response */
/* FIXME: lock-up detection, backtrace on lock-up */
return 0;
}
+int smp_call_function(void (*func) (void *info), void *info, int retry,
+ int wait)
+{
+ return smp_call_function_mask(cpu_online_map, func, info, retry, wait);
+}
void smp_call_function_interrupt(void)
{
* Notify initiating CPU that I've grabbed the data and am
* about to execute the function.
*/
- mb();
+ smp_mb();
atomic_inc(&call_data->started);
/*
irq_exit();
if (wait) {
- mb();
+ smp_mb();
atomic_inc(&call_data->finished);
}
}
+int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+ int retry, int wait)
+{
+ int ret, me;
+
+ /*
+ * Can die spectacularly if this CPU isn't yet marked online
+ */
+ if (!cpu_online(cpu))
+ return 0;
+
+ me = get_cpu();
+ BUG_ON(!cpu_online(me));
+
+ if (cpu == me) {
+ local_irq_disable();
+ func(info);
+ local_irq_enable();
+ put_cpu();
+ return 0;
+ }
+
+ ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, retry,
+ wait);
+
+ put_cpu();
+ return 0;
+}
+
static void stop_this_cpu(void *dummy)
{
/*
{
init_new_context(current, &init_mm);
current_thread_info()->cpu = 0;
- smp_tune_scheduling();
plat_prepare_cpus(max_cpus);
#ifndef CONFIG_HOTPLUG_CPU
cpu_present_map = cpu_possible_map;
* and keep control until "cpu_online(cpu)" is set. Note: cpu is
* physical, not logical.
*/
-int __devinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu)
{
struct task_struct *idle;
preempt_disable();
if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) {
- smp_on_other_tlbs(flush_tlb_mm_ipi, (void *)mm);
+ smp_on_other_tlbs(flush_tlb_mm_ipi, mm);
} else {
- int i;
- for (i = 0; i < num_online_cpus(); i++)
- if (smp_processor_id() != i)
- cpu_context(i, mm) = 0;
+ cpumask_t mask = cpu_online_map;
+ unsigned int cpu;
+
+ cpu_clear(smp_processor_id(), mask);
+ for_each_cpu_mask(cpu, mask)
+ if (cpu_context(cpu, mm))
+ cpu_context(cpu, mm) = 0;
}
local_flush_tlb_mm(mm);
static void flush_tlb_range_ipi(void *info)
{
- struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
+ struct flush_tlb_data *fd = info;
local_flush_tlb_range(fd->vma, fd->addr1, fd->addr2);
}
preempt_disable();
if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) {
- struct flush_tlb_data fd;
+ struct flush_tlb_data fd = {
+ .vma = vma,
+ .addr1 = start,
+ .addr2 = end,
+ };
- fd.vma = vma;
- fd.addr1 = start;
- fd.addr2 = end;
- smp_on_other_tlbs(flush_tlb_range_ipi, (void *)&fd);
+ smp_on_other_tlbs(flush_tlb_range_ipi, &fd);
} else {
- int i;
- for (i = 0; i < num_online_cpus(); i++)
- if (smp_processor_id() != i)
- cpu_context(i, mm) = 0;
+ cpumask_t mask = cpu_online_map;
+ unsigned int cpu;
+
+ cpu_clear(smp_processor_id(), mask);
+ for_each_cpu_mask(cpu, mask)
+ if (cpu_context(cpu, mm))
+ cpu_context(cpu, mm) = 0;
}
local_flush_tlb_range(vma, start, end);
preempt_enable();
static void flush_tlb_kernel_range_ipi(void *info)
{
- struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
+ struct flush_tlb_data *fd = info;
local_flush_tlb_kernel_range(fd->addr1, fd->addr2);
}
void flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
- struct flush_tlb_data fd;
+ struct flush_tlb_data fd = {
+ .addr1 = start,
+ .addr2 = end,
+ };
- fd.addr1 = start;
- fd.addr2 = end;
- on_each_cpu(flush_tlb_kernel_range_ipi, (void *)&fd, 1, 1);
+ on_each_cpu(flush_tlb_kernel_range_ipi, &fd, 1, 1);
}
static void flush_tlb_page_ipi(void *info)
{
- struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
+ struct flush_tlb_data *fd = info;
local_flush_tlb_page(fd->vma, fd->addr1);
}
{
preempt_disable();
if ((atomic_read(&vma->vm_mm->mm_users) != 1) || (current->mm != vma->vm_mm)) {
- struct flush_tlb_data fd;
+ struct flush_tlb_data fd = {
+ .vma = vma,
+ .addr1 = page,
+ };
- fd.vma = vma;
- fd.addr1 = page;
- smp_on_other_tlbs(flush_tlb_page_ipi, (void *)&fd);
+ smp_on_other_tlbs(flush_tlb_page_ipi, &fd);
} else {
- int i;
- for (i = 0; i < num_online_cpus(); i++)
- if (smp_processor_id() != i)
- cpu_context(i, vma->vm_mm) = 0;
+ cpumask_t mask = cpu_online_map;
+ unsigned int cpu;
+
+ cpu_clear(smp_processor_id(), mask);
+ for_each_cpu_mask(cpu, mask)
+ if (cpu_context(cpu, vma->vm_mm))
+ cpu_context(cpu, vma->vm_mm) = 0;
}
local_flush_tlb_page(vma, page);
preempt_enable();
smp_on_each_tlb(flush_tlb_one_ipi, (void *) vaddr);
}
-static DEFINE_PER_CPU(struct cpu, cpu_devices);
-
-static int __init topology_init(void)
-{
- int i, ret;
-
-#ifdef CONFIG_NUMA
- for_each_online_node(i)
- register_one_node(i);
-#endif /* CONFIG_NUMA */
-
- for_each_present_cpu(i) {
- ret = register_cpu(&per_cpu(cpu_devices, i), i);
- if (ret)
- printk(KERN_WARNING "topology_init: register_cpu %d "
- "failed (%d)\n", i, ret);
- }
-
- return 0;
-}
-
-subsys_initcall(topology_init);
-
EXPORT_SYMBOL(flush_tlb_page);
EXPORT_SYMBOL(flush_tlb_one);