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author | James Morris <jmorris@namei.org> | 2011-03-08 10:55:06 +1100 |
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committer | James Morris <jmorris@namei.org> | 2011-03-08 10:55:06 +1100 |
commit | 1cc26bada9f6807814806db2f0d78792eecdac71 (patch) | |
tree | 5509b5139db04af6c13db0a580c84116a4a54039 /arch/sh/lib/delay.c | |
parent | eae61f3c829439f8f9121b5cd48a14be04df451f (diff) | |
parent | 214d93b02c4fe93638ad268613c9702a81ed9192 (diff) |
Merge branch 'master'; commit 'v2.6.38-rc7' into next
Diffstat (limited to 'arch/sh/lib/delay.c')
-rw-r--r-- | arch/sh/lib/delay.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/sh/lib/delay.c b/arch/sh/lib/delay.c index faa8f86c0db4..0901b2f14e15 100644 --- a/arch/sh/lib/delay.c +++ b/arch/sh/lib/delay.c @@ -10,6 +10,16 @@ void __delay(unsigned long loops) { __asm__ __volatile__( + /* + * ST40-300 appears to have an issue with this code, + * normally taking two cycles each loop, as with all + * other SH variants. If however the branch and the + * delay slot straddle an 8 byte boundary, this increases + * to 3 cycles. + * This align directive ensures this doesn't occur. + */ + ".balign 8\n\t" + "tst %0, %0\n\t" "1:\t" "bf/s 1b\n\t" |