1 files changed, 57 insertions, 29 deletions

diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 90eaca3ec9a6..f62bf3a2de1a 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -39,6 +39,7 @@
 #include <asm/starfire.h>
 #include <asm/tlb.h>
 #include <asm/sections.h>
+#include <asm/prom.h>
 
 extern void calibrate_delay(void);
 
@@ -76,41 +77,42 @@ void smp_bogo(struct seq_file *m)
 
 void __init smp_store_cpu_info(int id)
 {
-	int cpu_node, def;
+	struct device_node *dp;
+	int def;
 
 	/* multiplier and counter set by
 	   smp_setup_percpu_timer()  */
 	cpu_data(id).udelay_val			= loops_per_jiffy;
 
-	cpu_find_by_mid(id, &cpu_node);
-	cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
-						     "clock-frequency", 0);
+	cpu_find_by_mid(id, &dp);
+	cpu_data(id).clock_tick =
+		of_getintprop_default(dp, "clock-frequency", 0);
 
 	def = ((tlb_type == hypervisor) ? (8 * 1024) : (16 * 1024));
-	cpu_data(id).dcache_size = prom_getintdefault(cpu_node, "dcache-size",
-						      def);
+	cpu_data(id).dcache_size =
+		of_getintprop_default(dp, "dcache-size", def);
 
 	def = 32;
 	cpu_data(id).dcache_line_size =
-		prom_getintdefault(cpu_node, "dcache-line-size", def);
+		of_getintprop_default(dp, "dcache-line-size", def);
 
 	def = 16 * 1024;
-	cpu_data(id).icache_size = prom_getintdefault(cpu_node, "icache-size",
-						      def);
+	cpu_data(id).icache_size =
+		of_getintprop_default(dp, "icache-size", def);
 
 	def = 32;
 	cpu_data(id).icache_line_size =
-		prom_getintdefault(cpu_node, "icache-line-size", def);
+		of_getintprop_default(dp, "icache-line-size", def);
 
 	def = ((tlb_type == hypervisor) ?
 	       (3 * 1024 * 1024) :
 	       (4 * 1024 * 1024));
-	cpu_data(id).ecache_size = prom_getintdefault(cpu_node, "ecache-size",
-						      def);
+	cpu_data(id).ecache_size =
+		of_getintprop_default(dp, "ecache-size", def);
 
 	def = 64;
 	cpu_data(id).ecache_line_size =
-		prom_getintdefault(cpu_node, "ecache-line-size", def);
+		of_getintprop_default(dp, "ecache-line-size", def);
 
 	printk("CPU[%d]: Caches "
 	       "D[sz(%d):line_sz(%d)] "
@@ -342,10 +344,10 @@ static int __devinit smp_boot_one_cpu(unsigned int cpu)
 
 		prom_startcpu_cpuid(cpu, entry, cookie);
 	} else {
-		int cpu_node;
+		struct device_node *dp;
 
-		cpu_find_by_mid(cpu, &cpu_node);
-		prom_startcpu(cpu_node, entry, cookie);
+		cpu_find_by_mid(cpu, &dp);
+		prom_startcpu(dp->node, entry, cookie);
 	}
 
 	for (timeout = 0; timeout < 5000000; timeout++) {
@@ -1264,7 +1266,6 @@ void __init smp_tick_init(void)
 	boot_cpu_id = hard_smp_processor_id();
 	current_tick_offset = timer_tick_offset;
 
-	cpu_set(boot_cpu_id, cpu_online_map);
 	prof_counter(boot_cpu_id) = prof_multiplier(boot_cpu_id) = 1;
 }
 
@@ -1288,6 +1289,41 @@ int setup_profiling_timer(unsigned int multiplier)
 	return 0;
 }
 
+static void __init smp_tune_scheduling(void)
+{
+	struct device_node *dp;
+	int instance;
+	unsigned int def, smallest = ~0U;
+
+	def = ((tlb_type == hypervisor) ?
+	       (3 * 1024 * 1024) :
+	       (4 * 1024 * 1024));
+
+	instance = 0;
+	while (!cpu_find_by_instance(instance, &dp, NULL)) {
+		unsigned int val;
+
+		val = of_getintprop_default(dp, "ecache-size", def);
+		if (val < smallest)
+			smallest = val;
+
+		instance++;
+	}
+
+	/* Any value less than 256K is nonsense.  */
+	if (smallest < (256U * 1024U))
+		smallest = 256 * 1024;
+
+	max_cache_size = smallest;
+
+	if (smallest < 1U * 1024U * 1024U)
+		printk(KERN_INFO "Using max_cache_size of %uKB\n",
+		       smallest / 1024U);
+	else
+		printk(KERN_INFO "Using max_cache_size of %uMB\n",
+		       smallest / 1024U / 1024U);
+}
+
 /* Constrain the number of cpus to max_cpus.  */
 void __init smp_prepare_cpus(unsigned int max_cpus)
 {
@@ -1323,6 +1359,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	}
 
 	smp_store_cpu_info(boot_cpu_id);
+	smp_tune_scheduling();
 }
 
 /* Set this up early so that things like the scheduler can init
@@ -1345,18 +1382,6 @@ void __init smp_setup_cpu_possible_map(void)
 
 void __devinit smp_prepare_boot_cpu(void)
 {
-	int cpu = hard_smp_processor_id();
-
-	if (cpu >= NR_CPUS) {
-		prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
-		prom_halt();
-	}
-
-	current_thread_info()->cpu = cpu;
-	__local_per_cpu_offset = __per_cpu_offset(cpu);
-
-	cpu_set(smp_processor_id(), cpu_online_map);
-	cpu_set(smp_processor_id(), phys_cpu_present_map);
 }
 
 int __devinit __cpu_up(unsigned int cpu)
@@ -1433,4 +1458,7 @@ void __init setup_per_cpu_areas(void)
 
 	for (i = 0; i < NR_CPUS; i++, ptr += size)
 		memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+
+	/* Setup %g5 for the boot cpu.  */
+	__local_per_cpu_offset = __per_cpu_offset(smp_processor_id());
 }