Add helper function to find a Local APIC by ID in the device tree.
Change-Id: Ie2d7d8e1f647a0c92d2de09e32454fbea688b1e7
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: http://review.coreboot.org/695
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 84fb115..5b182e1 100644
--- a/src/devices/device_util.c
+++ b/src/devices/device_util.c
@@ -110,6 +110,26 @@
}
/**
+ * Given a Local APIC ID, find the device structure.
+ *
+ * @param apic_id The Local APIC ID number.
+ * @return Pointer to the device structure (if found), 0 otherwise.
+ */
+device_t dev_find_lapic(unsigned apic_id)
+{
+ device_t dev, result = NULL;
+
+ for (dev = all_devices; dev; dev = dev->next) {
+ if (dev->path.type == DEVICE_PATH_APIC &&
+ dev->path.apic.apic_id == apic_id) {
+ result = dev;
+ break;
+ }
+ }
+ return result;
+}
+
+/**
* Find a device of a given vendor and type.
*
* @param vendor A PCI vendor ID (e.g. 0x8086 for Intel).