Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

[linux-2.6-omap-h63xx.git] / arch / ia64 / kernel / smpboot.c

diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 9f5c90b594b9361bf839c15b99a41d89bf9f28ce..32ee5979a042c35e120ea1bc9fa0acd49bb411c8 100644 (file)
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -58,6 +58,7 @@
 #include <asm/system.h>
 #include <asm/tlbflush.h>
 #include <asm/unistd.h>
+#include <asm/sn/arch.h>
 
 #define SMP_DEBUG 0
 
@@ -119,7 +120,6 @@ static volatile unsigned long go[SLAVE + 1];
 
 #define DEBUG_ITC_SYNC 0
 
-extern void __devinit calibrate_delay (void);
 extern void start_ap (void);
 extern unsigned long ia64_iobase;
 
@@ -137,9 +137,10 @@ cpumask_t cpu_possible_map = CPU_MASK_NONE;
 EXPORT_SYMBOL(cpu_possible_map);
 
 cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned;
-cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
+DEFINE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map);
+EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
+
 int smp_num_siblings = 1;
-int smp_num_cpucores = 1;
 
 /* which logical CPU number maps to which CPU (physical APIC ID) */
 volatile int ia64_cpu_to_sapicid[NR_CPUS];
@@ -475,7 +476,7 @@ start_secondary (void *unused)
        return 0;
 }
 
-struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
+struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
 {
        return NULL;
 }
@@ -487,7 +488,7 @@ struct create_idle {
        int cpu;
 };
 
-void
+void __cpuinit
 do_fork_idle(struct work_struct *work)
 {
        struct create_idle *c_idle =
@@ -497,7 +498,7 @@ do_fork_idle(struct work_struct *work)
        complete(&c_idle->done);
 }
 
-static int __devinit
+static int __cpuinit
 do_boot_cpu (int sapicid, int cpu)
 {
        int timeout;
@@ -649,12 +650,12 @@ clear_cpu_sibling_map(int cpu)
 {
        int i;
 
-       for_each_cpu_mask(i, cpu_sibling_map[cpu])
-               cpu_clear(cpu, cpu_sibling_map[i]);
+       for_each_cpu_mask(i, per_cpu(cpu_sibling_map, cpu))
+               cpu_clear(cpu, per_cpu(cpu_sibling_map, i));
        for_each_cpu_mask(i, cpu_core_map[cpu])
                cpu_clear(cpu, cpu_core_map[i]);
 
-       cpu_sibling_map[cpu] = cpu_core_map[cpu] = CPU_MASK_NONE;
+       per_cpu(cpu_sibling_map, cpu) = cpu_core_map[cpu] = CPU_MASK_NONE;
 }
 
 static void
@@ -665,7 +666,7 @@ remove_siblinginfo(int cpu)
        if (cpu_data(cpu)->threads_per_core == 1 &&
            cpu_data(cpu)->cores_per_socket == 1) {
                cpu_clear(cpu, cpu_core_map[cpu]);
-               cpu_clear(cpu, cpu_sibling_map[cpu]);
+               cpu_clear(cpu, per_cpu(cpu_sibling_map, cpu));
                return;
        }
 
@@ -730,6 +731,11 @@ int __cpu_disable(void)
                return (-EBUSY);
        }
 
+       if (ia64_platform_is("sn2")) {
+               if (!sn_cpu_disable_allowed(cpu))
+                       return -EBUSY;
+       }
+
        cpu_clear(cpu, cpu_online_map);
 
        if (migrate_platform_irqs(cpu)) {
@@ -760,17 +766,6 @@ void __cpu_die(unsigned int cpu)
        }
        printk(KERN_ERR "CPU %u didn't die...\n", cpu);
 }
-#else /* !CONFIG_HOTPLUG_CPU */
-int __cpu_disable(void)
-{
-       return -ENOSYS;
-}
-
-void __cpu_die(unsigned int cpu)
-{
-       /* We said "no" in __cpu_disable */
-       BUG();
-}
 #endif /* CONFIG_HOTPLUG_CPU */
 
 void
@@ -801,14 +796,14 @@ set_cpu_sibling_map(int cpu)
                        cpu_set(i, cpu_core_map[cpu]);
                        cpu_set(cpu, cpu_core_map[i]);
                        if (cpu_data(cpu)->core_id == cpu_data(i)->core_id) {
-                               cpu_set(i, cpu_sibling_map[cpu]);
-                               cpu_set(cpu, cpu_sibling_map[i]);
+                               cpu_set(i, per_cpu(cpu_sibling_map, cpu));
+                               cpu_set(cpu, per_cpu(cpu_sibling_map, i));
                        }
                }
        }
 }
 
-int __devinit
+int __cpuinit
 __cpu_up (unsigned int cpu)
 {
        int ret;
@@ -833,7 +828,7 @@ __cpu_up (unsigned int cpu)
 
        if (cpu_data(cpu)->threads_per_core == 1 &&
            cpu_data(cpu)->cores_per_socket == 1) {
-               cpu_set(cpu, cpu_sibling_map[cpu]);
+               cpu_set(cpu, per_cpu(cpu_sibling_map, cpu));
                cpu_set(cpu, cpu_core_map[cpu]);
                return 0;
        }
@@ -878,13 +873,17 @@ identify_siblings(struct cpuinfo_ia64 *c)
        u16 pltid;
        pal_logical_to_physical_t info;
 
-       if (smp_num_cpucores == 1 && smp_num_siblings == 1)
-               return;
-
        if ((status = ia64_pal_logical_to_phys(-1, &info)) != PAL_STATUS_SUCCESS) {
-               printk(KERN_ERR "ia64_pal_logical_to_phys failed with %ld\n",
-                      status);
-               return;
+               if (status != PAL_STATUS_UNIMPLEMENTED) {
+                       printk(KERN_ERR
+                               "ia64_pal_logical_to_phys failed with %ld\n",
+                               status);
+                       return;
+               }
+
+               info.overview_ppid = 0;
+               info.overview_cpp  = 1;
+               info.overview_tpc  = 1;
        }
        if ((status = ia64_sal_physical_id_info(&pltid)) != PAL_STATUS_SUCCESS) {
                printk(KERN_ERR "ia64_sal_pltid failed with %ld\n", status);
@@ -892,6 +891,10 @@ identify_siblings(struct cpuinfo_ia64 *c)
        }
 
        c->socket_id =  (pltid << 8) | info.overview_ppid;
+
+       if (info.overview_cpp == 1 && info.overview_tpc == 1)
+               return;
+
        c->cores_per_socket = info.overview_cpp;
        c->threads_per_core = info.overview_tpc;
        c->num_log = info.overview_num_log;