commit dc8448fd8be4768ef9d5f9b8cbcf28db0a2029be
author Stefan Reinauer <reinauer@chromium.org> Fri Mar 30 13:52:58 2012 -0700
committer Stefan Reinauer <stefan.reinauer@coreboot.org> Mon Apr 02 18:39:58 2012 +0200
tree d4c7e2ab6cbfb649ee4421d734dddc050c8768a6
parent d40393e3903e57496afcfc88ec094ae17f0e9437

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>

src/devices/device_util.c

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;
+}

src/include/device/device.h

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,