diff options
Diffstat (limited to 'arch/sparc64/kernel/smp.c')
| -rw-r--r-- | arch/sparc64/kernel/smp.c | 86 |
1 files changed, 57 insertions, 29 deletions
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index 90eaca3ec9a..f62bf3a2de1 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()); } |