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-rw-r--r--arch/sh/kernel/head_32.S12
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
index ae0a382a82eb..788605ff7088 100644
--- a/arch/sh/kernel/head_32.S
+++ b/arch/sh/kernel/head_32.S
@@ -80,8 +80,14 @@ ENTRY(_stext)
mov.l 7f, r0
ldc r0, r7_bank ! ... and initial thread_info
#endif
-
- ! Clear BSS area
+
+#ifndef CONFIG_SH_NO_BSS_INIT
+ /*
+ * Don't clear BSS if running on slow platforms such as an RTL simulation,
+ * remote memory via SHdebug link, etc. For these the memory can be guaranteed
+ * to be all zero on boot anyway.
+ */
+ ! Clear BSS area
#ifdef CONFIG_SMP
mov.l 3f, r0
cmp/eq #0, r0 ! skip clear if set to zero
@@ -97,6 +103,8 @@ ENTRY(_stext)
mov.l r0,@-r2
10:
+#endif
+
! Additional CPU initialization
mov.l 6f, r0
jsr @r0