#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 */
rmb();
cpu_set(cpuid, cpu_online_map);
+
+ /* idle thread is expected to have preempt disabled */
+ preempt_disable();
}
void cpu_panic(void)
p = fork_idle(cpu);
callin_flag = 0;
- cpu_new_thread = p->thread_info;
+ cpu_new_thread = task_thread_info(p);
cpu_set(cpu, cpu_callout_map);
cpu_find_by_mid(cpu, &cpu_node);
* 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)
return 0;
}
+/* Constrain the number of cpus to max_cpus. */
void __init smp_prepare_cpus(unsigned int max_cpus)
{
- int instance, mid;
-
- instance = 0;
- while (!cpu_find_by_instance(instance, NULL, &mid)) {
- if (mid < max_cpus)
- cpu_set(mid, phys_cpu_present_map);
- instance++;
- }
-
if (num_possible_cpus() > max_cpus) {
+ int instance, mid;
+
instance = 0;
while (!cpu_find_by_instance(instance, NULL, &mid)) {
if (mid != boot_cpu_id) {
smp_store_cpu_info(boot_cpu_id);
}
+/* Set this up early so that things like the scheduler can init
+ * properly. We use the same cpu mask for both the present and
+ * possible cpu map.
+ */
+void __init smp_setup_cpu_possible_map(void)
+{
+ int instance, mid;
+
+ instance = 0;
+ while (!cpu_find_by_instance(instance, NULL, &mid)) {
+ if (mid < NR_CPUS)
+ cpu_set(mid, phys_cpu_present_map);
+ instance++;
+ }
+}
+
void __devinit smp_prepare_boot_cpu(void)
{
if (hard_smp_processor_id() >= NR_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