return !!((1 << core) & cpu_mask());
}
+static int is_pos_valid(unsigned int pos)
+{
+ return !!((1 << pos) & cpu_pos_mask());
+}
+
int is_core_online(u64 cpu_id)
{
u64 *table;
return 0;
}
-int core_to_pos(int nr)
+static int core_to_pos(int nr)
{
- u32 cores = cpu_mask();
+ u32 cores = cpu_pos_mask();
int i, count = 0;
if (nr == 0) {
}
for (i = 1; i < 32; i++) {
- if (is_core_valid(i)) {
+ if (is_pos_valid(i)) {
count++;
if (count == nr)
break;
}
}
- return count;
+ if (count != nr)
+ return -1;
+
+ return i;
}
int cpu_status(int nr)
(unsigned long)table + SPIN_TABLE_ELEM_SIZE);
asm volatile("dsb st");
smp_kick_all_cpus(); /* only those with entry addr set will run */
+ /*
+ * When the first release command runs, all cores are set to go. Those
+ * without a valid entry address will be trapped by "wfe". "sev" kicks
+ * them off to check the address again. When set, they continue to run.
+ */
+ asm volatile("sev");
return 0;
}