#include <asm/tlbflush.h>
#include <asm/cpudata.h>
-volatile int smp_processors_ready = 0;
int smp_num_cpus = 1;
volatile unsigned long cpu_callin_map[NR_CPUS] __initdata = {0,};
unsigned char boot_cpu_id = 0;
cpumask_t cpu_online_map = CPU_MASK_NONE;
cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
+cpumask_t smp_commenced_mask = CPU_MASK_NONE;
/* The only guaranteed locking primitive available on all Sparc
* processors is 'ldstub [%reg + immediate], %dest_reg' which atomically
/* Used to make bitops atomic */
unsigned char bitops_spinlock = 0;
-volatile unsigned long ipi_count;
-
-volatile int smp_process_available=0;
-volatile int smp_commenced = 0;
-
-void __init smp_store_cpu_info(int id)
+void __cpuinit smp_store_cpu_info(int id)
{
int cpu_node;
"clock-frequency", 0);
cpu_data(id).prom_node = cpu_node;
cpu_data(id).mid = cpu_get_hwmid(cpu_node);
+
+ /* this is required to tune the scheduler correctly */
+ /* is it possible to have CPUs with different cache sizes? */
+ if (id == boot_cpu_id) {
+ int cache_line,cache_nlines;
+ cache_line = 0x20;
+ cache_line = prom_getintdefault(cpu_node, "ecache-line-size", cache_line);
+ cache_nlines = 0x8000;
+ cache_nlines = prom_getintdefault(cpu_node, "ecache-nlines", cache_nlines);
+ max_cache_size = cache_line * cache_nlines;
+ }
if (cpu_data(id).mid < 0)
panic("No MID found for CPU%d at node 0x%08d", id, cpu_node);
}
void __init smp_cpus_done(unsigned int max_cpus)
{
+ extern void smp4m_smp_done(void);
+ extern void smp4d_smp_done(void);
+ unsigned long bogosum = 0;
+ int cpu, num;
+
+ for (cpu = 0, num = 0; cpu < NR_CPUS; cpu++)
+ if (cpu_online(cpu)) {
+ num++;
+ bogosum += cpu_data(cpu).udelay_val;
+ }
+
+ printk("Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
+ num, bogosum/(500000/HZ),
+ (bogosum/(5000/HZ))%100);
+
+ switch(sparc_cpu_model) {
+ case sun4:
+ printk("SUN4\n");
+ BUG();
+ break;
+ case sun4c:
+ printk("SUN4C\n");
+ BUG();
+ break;
+ case sun4m:
+ smp4m_smp_done();
+ break;
+ case sun4d:
+ smp4d_smp_done();
+ break;
+ case sun4e:
+ printk("SUN4E\n");
+ BUG();
+ break;
+ case sun4u:
+ printk("SUN4U\n");
+ BUG();
+ break;
+ default:
+ printk("UNKNOWN!\n");
+ BUG();
+ break;
+ };
}
void cpu_panic(void)
struct linux_prom_registers smp_penguin_ctable __initdata = { 0 };
-void __init smp_boot_cpus(void)
-{
- extern void smp4m_boot_cpus(void);
- extern void smp4d_boot_cpus(void);
-
- if (sparc_cpu_model == sun4m)
- smp4m_boot_cpus();
- else
- smp4d_boot_cpus();
-}
-
void smp_send_reschedule(int cpu)
{
/* See sparc64 */
return -EINVAL;
spin_lock_irqsave(&prof_setup_lock, flags);
- for(i = 0; i < NR_CPUS; i++) {
- if (cpu_possible(i))
- load_profile_irq(i, lvl14_resolution / multiplier);
+ for_each_possible_cpu(i) {
+ load_profile_irq(i, lvl14_resolution / multiplier);
prof_multiplier(i) = multiplier;
}
spin_unlock_irqrestore(&prof_setup_lock, flags);
return 0;
}
-void __init smp_prepare_cpus(unsigned int maxcpus)
+void __init smp_prepare_cpus(unsigned int max_cpus)
{
+ extern void __init smp4m_boot_cpus(void);
+ extern void __init smp4d_boot_cpus(void);
+ int i, cpuid, extra;
+
+ printk("Entering SMP Mode...\n");
+
+ extra = 0;
+ for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) {
+ if (cpuid >= NR_CPUS)
+ extra++;
+ }
+ /* i = number of cpus */
+ if (extra && max_cpus > i - extra)
+ printk("Warning: NR_CPUS is too low to start all cpus\n");
+
+ smp_store_cpu_info(boot_cpu_id);
+
+ switch(sparc_cpu_model) {
+ case sun4:
+ printk("SUN4\n");
+ BUG();
+ break;
+ case sun4c:
+ printk("SUN4C\n");
+ BUG();
+ break;
+ case sun4m:
+ smp4m_boot_cpus();
+ break;
+ case sun4d:
+ smp4d_boot_cpus();
+ break;
+ case sun4e:
+ printk("SUN4E\n");
+ BUG();
+ break;
+ case sun4u:
+ printk("SUN4U\n");
+ BUG();
+ break;
+ default:
+ printk("UNKNOWN!\n");
+ BUG();
+ break;
+ };
+}
+
+/* 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);
+ cpu_set(mid, cpu_present_map);
+ }
+ instance++;
+ }
}
-void __devinit smp_prepare_boot_cpu(void)
+void __init smp_prepare_boot_cpu(void)
{
- current_thread_info()->cpu = hard_smp_processor_id();
- cpu_set(smp_processor_id(), cpu_online_map);
- cpu_set(smp_processor_id(), phys_cpu_present_map);
+ int cpuid = hard_smp_processor_id();
+
+ if (cpuid >= NR_CPUS) {
+ prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
+ prom_halt();
+ }
+ if (cpuid != 0)
+ printk("boot cpu id != 0, this could work but is untested\n");
+
+ current_thread_info()->cpu = cpuid;
+ cpu_set(cpuid, cpu_online_map);
+ cpu_set(cpuid, phys_cpu_present_map);
}
-int __devinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu)
{
- panic("smp doesn't work\n");
+ extern int __cpuinit smp4m_boot_one_cpu(int);
+ extern int __cpuinit smp4d_boot_one_cpu(int);
+ int ret=0;
+
+ switch(sparc_cpu_model) {
+ case sun4:
+ printk("SUN4\n");
+ BUG();
+ break;
+ case sun4c:
+ printk("SUN4C\n");
+ BUG();
+ break;
+ case sun4m:
+ ret = smp4m_boot_one_cpu(cpu);
+ break;
+ case sun4d:
+ ret = smp4d_boot_one_cpu(cpu);
+ break;
+ case sun4e:
+ printk("SUN4E\n");
+ BUG();
+ break;
+ case sun4u:
+ printk("SUN4U\n");
+ BUG();
+ break;
+ default:
+ printk("UNKNOWN!\n");
+ BUG();
+ break;
+ };
+
+ if (!ret) {
+ cpu_set(cpu, smp_commenced_mask);
+ while (!cpu_online(cpu))
+ mb();
+ }
+ return ret;
}
void smp_bogo(struct seq_file *m)
{
int i;
- for (i = 0; i < NR_CPUS; i++) {
- if (cpu_online(i))
- seq_printf(m,
- "Cpu%dBogo\t: %lu.%02lu\n",
- i,
- cpu_data(i).udelay_val/(500000/HZ),
- (cpu_data(i).udelay_val/(5000/HZ))%100);
+ for_each_online_cpu(i) {
+ seq_printf(m,
+ "Cpu%dBogo\t: %lu.%02lu\n",
+ i,
+ cpu_data(i).udelay_val/(500000/HZ),
+ (cpu_data(i).udelay_val/(5000/HZ))%100);
}
}
int i;
seq_printf(m, "State:\n");
- for (i = 0; i < NR_CPUS; i++) {
- if (cpu_online(i))
- seq_printf(m, "CPU%d\t\t: online\n", i);
- }
+ for_each_online_cpu(i)
+ seq_printf(m, "CPU%d\t\t: online\n", i);
}
git://git.onelab.eu / linux-2.6.git / blobdiff