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-rw-r--r--cpu/mpc5xxx/start.S3
1 files changed, 3 insertions, 0 deletions
diff --git a/cpu/mpc5xxx/start.S b/cpu/mpc5xxx/start.S
index a001e1ce40..26811e11ad 100644
--- a/cpu/mpc5xxx/start.S
+++ b/cpu/mpc5xxx/start.S
@@ -104,6 +104,9 @@ boot_warm:
mfmsr r5 /* save msr contents */
#if defined(CFG_LOWBOOT)
+#if defined(CFG_RAMBOOT)
+#error CFG_LOWBOOT is incompatible with CFG_RAMBOOT
+#endif /* CFG_RAMBOOT */
lis r4, CFG_DEFAULT_MBAR@h
lis r3, 0x0000FF00@h
ori r3, r3, 0x0000FF00@l