fix(cpus): assert invalid cpu_ops obtained
Not including the proper CPU file can halt execution at the
reset_handler since the cpu_ops obtained will be invalid and therefore
the cpu reset function will be invalid too, unless SUPPORT_UNKNOWN_MPID
is enabled.
This patch adds an assert to check for the validity of the obtained
cpu_ops object and will display an error if the object is invalid.
Change-Id: I0e1661745e4a692aab5e910e110c2de0caf64f46
Signed-off-by: Thaddeus Serna <Thaddeus.Gonzalez-Serna@arm.com>
diff --git a/lib/cpus/aarch64/cpu_helpers.S b/lib/cpus/aarch64/cpu_helpers.S
index a4285ed..1ae3180 100644
--- a/lib/cpus/aarch64/cpu_helpers.S
+++ b/lib/cpus/aarch64/cpu_helpers.S
@@ -33,6 +33,15 @@
/* Get the matching cpu_ops pointer */
bl get_cpu_ops_ptr
+#if ENABLE_ASSERTIONS
+ /*
+ * Assert if invalid cpu_ops obtained. If this is not valid, it may
+ * suggest that the proper CPU file hasn't been included.
+ */
+ cmp x0, #0
+ ASM_ASSERT(ne)
+#endif
+
/* Get the cpu_ops reset handler */
ldr x2, [x0, #CPU_RESET_FUNC]
mov x30, x19