Add a helper function to determine the number of enabled CPUs
Change-Id: Ia72926002571e0f250849fa5db048bd8b2e92400
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: http://review.coreboot.org/821
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/devices/device_util.c b/src/devices/device_util.c
index 526490a..5225938 100644
--- a/src/devices/device_util.c
+++ b/src/devices/device_util.c
@@ -850,3 +850,21 @@
return tolm;
}
+
+/* Count of enabled CPUs */
+int dev_count_cpu(void)
+{
+ device_t cpu;
+ int count = 0;
+
+ for (cpu = all_devices; cpu; cpu = cpu->next) {
+ if ((cpu->path.type != DEVICE_PATH_APIC) ||
+ (cpu->bus->dev->path.type != DEVICE_PATH_APIC_CLUSTER))
+ continue;
+ if (!cpu->enabled)
+ continue;
+ count++;
+ }
+
+ return count;
+}
diff --git a/src/include/device/device.h b/src/include/device/device.h
index c097f57..0aea1d6 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -133,6 +133,7 @@
device_t dev_find_slot (unsigned int bus, unsigned int devfn);
device_t dev_find_slot_on_smbus (unsigned int bus, unsigned int addr);
device_t dev_find_lapic(unsigned apic_id);
+int dev_count_cpu(void);
/* Debug functions */
void print_resource_tree(struct device * root, int debug_level,