From c8e674125e03c5f36ccfd61d83b933e6956074b0 Mon Sep 17 00:00:00 2001
From: Michael Hennerich <michael.hennerich@analog.com>
Date: Wed, 4 Feb 2009 16:49:45 +0800
Subject: [PATCH] Blackfin arch: Remove outdated code
The removed version with the loop registers saved on the stack was
originally intended to workaround the missing toolchain support for
LoopReg Clobbers.
Since our toolchain now supports these there is no point in keeping this
workaround. And since we don't touch LoopRegs anymore we're no longer
subject for ANOMALY_05000312.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---
arch/blackfin/include/asm/delay.h | 24 +-----------------------
1 file changed, 1 insertion(+), 23 deletions(-)
diff --git a/arch/blackfin/include/asm/delay.h b/arch/blackfin/include/asm/delay.h
index 47f98c5067b5e..c31f91cc1d5db 100644
--- a/arch/blackfin/include/asm/delay.h
+++ b/arch/blackfin/include/asm/delay.h
@@ -13,29 +13,7 @@
static inline void __delay(unsigned long loops)
{
- if (ANOMALY_05000312) {
- /* Interrupted loads to loop registers -> bad */
- unsigned long tmp;
- __asm__ __volatile__(
- "[--SP] = LC0;"
- "[--SP] = LT0;"
- "[--SP] = LB0;"
- "LSETUP (1f,1f) LC0 = %1;"
- "1: NOP;"
- /* We take advantage of the fact that LC0 is 0 at
- * the end of the loop. Otherwise we'd need some
- * NOPs after the CLI here.
- */
- "CLI %0;"
- "LB0 = [SP++];"
- "LT0 = [SP++];"
- "LC0 = [SP++];"
- "STI %0;"
- : "=d" (tmp)
- : "a" (loops)
- );
- } else
- __asm__ __volatile__ (
+__asm__ __volatile__ (
"LSETUP(1f, 1f) LC0 = %0;"
"1: NOP;"
:
--
GitLab