Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart

[pandora-kernel.git] / arch / mips / kernel / smp.c

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 25472fc..0555fc5 100644 (file)
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -29,6 +29,7 @@
 #include <linux/timex.h>
 #include <linux/sched.h>
 #include <linux/cpumask.h>
+#include <linux/cpu.h>
 
 #include <asm/atomic.h>
 #include <asm/cpu.h>
@@ -37,6 +38,10 @@
 #include <asm/mmu_context.h>
 #include <asm/smp.h>
 
+#ifdef CONFIG_MIPS_MT_SMTC
+#include <asm/mipsmtregs.h>
+#endif /* CONFIG_MIPS_MT_SMTC */
+
 cpumask_t phys_cpu_present_map;                /* Bitmask of available CPUs */
 volatile cpumask_t cpu_callin_map;     /* Bitmask of started secondaries */
 cpumask_t cpu_online_map;              /* Bitmask of currently online CPUs */
@@ -84,6 +89,10 @@ asmlinkage void start_secondary(void)
 {
        unsigned int cpu;
 
+#ifdef CONFIG_MIPS_MT_SMTC
+       /* Only do cpu_probe for first TC of CPU */
+       if ((read_c0_tcbind() & TCBIND_CURTC) == 0)
+#endif /* CONFIG_MIPS_MT_SMTC */
        cpu_probe();
        cpu_report();
        per_cpu_trap_init();
@@ -163,11 +172,11 @@ int smp_call_function (void (*func) (void *info), void *info, int retry,
 
        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 (i = 0; i < NR_CPUS; i++)
-               if (cpu_online(i) && i != cpu)
+       for_each_online_cpu(i)
+               if (i != cpu)
                        core_send_ipi(i, SMP_CALL_FUNCTION);
 
        /* Wait for response */
@@ -178,11 +187,13 @@ int smp_call_function (void (*func) (void *info), void *info, int retry,
        if (wait)
                while (atomic_read(&data.finished) != cpus)
                        barrier();
+       call_data = NULL;
        spin_unlock(&smp_call_lock);
 
        return 0;
 }
 
+
 void smp_call_function_interrupt(void)
 {
        void (*func) (void *info) = call_data->func;
@@ -193,7 +204,7 @@ 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);
 
        /*
@@ -204,7 +215,7 @@ void smp_call_function_interrupt(void)
        irq_exit();
 
        if (wait) {
-               mb();
+               smp_mb();
                atomic_inc(&call_data->finished);
        }
 }
@@ -235,7 +246,10 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
        init_new_context(current, &init_mm);
        current_thread_info()->cpu = 0;
        smp_tune_scheduling();
-       prom_prepare_cpus(max_cpus);
+       plat_prepare_cpus(max_cpus);
+#ifndef CONFIG_HOTPLUG_CPU
+       cpu_present_map = cpu_possible_map;
+#endif
 }
 
 /* preload SMP state for boot cpu */
@@ -257,7 +271,7 @@ void __devinit smp_prepare_boot_cpu(void)
  * 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;
 
@@ -296,7 +310,7 @@ static void flush_tlb_all_ipi(void *info)
 
 void flush_tlb_all(void)
 {
-       on_each_cpu(flush_tlb_all_ipi, 0, 1, 1);
+       on_each_cpu(flush_tlb_all_ipi, NULL, 1, 1);
 }
 
 static void flush_tlb_mm_ipi(void *mm)
@@ -304,6 +318,32 @@ static void flush_tlb_mm_ipi(void *mm)
        local_flush_tlb_mm((struct mm_struct *)mm);
 }
 
+/*
+ * Special Variant of smp_call_function for use by TLB functions:
+ *
+ *  o No return value
+ *  o collapses to normal function call on UP kernels
+ *  o collapses to normal function call on systems with a single shared
+ *    primary cache.
+ *  o CONFIG_MIPS_MT_SMTC currently implies there is only one physical core.
+ */
+static inline void smp_on_other_tlbs(void (*func) (void *info), void *info)
+{
+#ifndef CONFIG_MIPS_MT_SMTC
+       smp_call_function(func, info, 1, 1);
+#endif
+}
+
+static inline void smp_on_each_tlb(void (*func) (void *info), void *info)
+{
+       preempt_disable();
+
+       smp_on_other_tlbs(func, info);
+       func(info);
+
+       preempt_enable();
+}
+
 /*
  * The following tlb flush calls are invoked when old translations are
  * being torn down, or pte attributes are changing. For single threaded
@@ -322,7 +362,7 @@ void flush_tlb_mm(struct mm_struct *mm)
        preempt_disable();
 
        if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) {
-               smp_call_function(flush_tlb_mm_ipi, (void *)mm, 1, 1);
+               smp_on_other_tlbs(flush_tlb_mm_ipi, (void *)mm);
        } else {
                int i;
                for (i = 0; i < num_online_cpus(); i++)
@@ -358,7 +398,7 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned l
                fd.vma = vma;
                fd.addr1 = start;
                fd.addr2 = end;
-               smp_call_function(flush_tlb_range_ipi, (void *)&fd, 1, 1);
+               smp_on_other_tlbs(flush_tlb_range_ipi, (void *)&fd);
        } else {
                int i;
                for (i = 0; i < num_online_cpus(); i++)
@@ -400,7 +440,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
 
                fd.vma = vma;
                fd.addr1 = page;
-               smp_call_function(flush_tlb_page_ipi, (void *)&fd, 1, 1);
+               smp_on_other_tlbs(flush_tlb_page_ipi, (void *)&fd);
        } else {
                int i;
                for (i = 0; i < num_online_cpus(); i++)
@@ -420,11 +460,8 @@ static void flush_tlb_one_ipi(void *info)
 
 void flush_tlb_one(unsigned long vaddr)
 {
-       smp_call_function(flush_tlb_one_ipi, (void *) vaddr, 1, 1);
-       local_flush_tlb_one(vaddr);
+       smp_on_each_tlb(flush_tlb_one_ipi, (void *) vaddr);
 }
 
 EXPORT_SYMBOL(flush_tlb_page);
 EXPORT_SYMBOL(flush_tlb_one);
-EXPORT_SYMBOL(cpu_data);
-EXPORT_SYMBOL(synchronize_irq);