Changeset 698227e6 in rtems

Timestamp:

10/27/22 21:58:01 (7 months ago)

Author:

Kinsey Moore <kinsey.moore@…>

Branches:

master

Children:

080dc5d

Parents:

7842a333

git-author:

Kinsey Moore <kinsey.moore@…> (10/27/22 21:58:01)

git-committer:

Joel Sherrill <joel@…> (11/09/22 14:14:11)

Message:

bsps/aarch64: Ensure FPU trap state is consistent

RTEMS may be booted from a dirty environment. Ensure that FPU trap
settings are consistent.

File:

• bsps/aarch64/shared/start/start.S (modified) (1 diff)

bsps/aarch64/shared/start/start.S

@@ -308 +308 @@
   /* FPU does not need to be enabled on AArch64 */
 
+  /* Ensure FPU traps are disabled by default */
+  mrs x0, FPCR
+  bic x0, x0, #((1 << 8) | (1 << 9) | (1 << 10) | (1 << 11) | (1 << 12))
+  bic x0, x0, #(1 << 15)
+  msr FPCR, x0
+
 #endif /* AARCH64_MULTILIB_VFP */