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From: dirk.behme at googlemail.com <dirk.behme@googlemail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH-OMAP3 v2] OMAP3: Fix typo and cp_delay
Date: Mon, 10 Nov 2008 21:00:13 +0100	[thread overview]
Message-ID: <491892ce.0407560a.71e5.ffffda98@mx.google.com> (raw)

Fix typo and cp_delay.

Note that most of ARM code uses for-loop as cp_delay() implementation.
Scott Wood made some tests and volatile prevents gcc from optimizing
loop away, so this implemention should be fine. For OMAP some nops are
sufficent, though. 

Signed-off-by: Dirk Behme <dirk.behme@gmail.com>

---

Changes in v2:

- Correct patch header style.

v2 of this patch makes previous version v1 obsolete.

 cpu/arm_cortexa8/cpu.c   |    5 ++---
 cpu/arm_cortexa8/start.S |    2 +-
 2 files changed, 3 insertions(+), 4 deletions(-)

Index: u-boot-arm/cpu/arm_cortexa8/start.S
===================================================================
--- u-boot-arm.orig/cpu/arm_cortexa8/start.S
+++ u-boot-arm/cpu/arm_cortexa8/start.S
@@ -394,7 +394,7 @@ irq:
 	.align	5
 fiq:
 	get_fiq_stack
-	/* someone ought to write a more effiction fiq_save_user_regs */
+	/* someone ought to write a more effective fiq_save_user_regs */
 	irq_save_user_regs
 	bl	do_fiq
 	irq_restore_user_regs
Index: u-boot-arm/cpu/arm_cortexa8/cpu.c
===================================================================
--- u-boot-arm.orig/cpu/arm_cortexa8/cpu.c
+++ u-boot-arm/cpu/arm_cortexa8/cpu.c
@@ -68,10 +68,9 @@ static void write_p15_c1(unsigned long v
 
 static void cp_delay(void)
 {
-	volatile int i;
-
 	/* Many OMAP regs need at least 2 nops */
-	for (i = 0; i < 100; i++) ;
+	asm("nop");
+	asm("nop");
 }
 
 /* See also ARM Ref. Man. */

             reply	other threads:[~2008-11-10 20:00 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-10 20:00 dirk.behme at googlemail.com [this message]
2008-11-20 22:44 ` [U-Boot] [PATCH-OMAP3 v2] OMAP3: Fix typo and cp_delay Jean-Christophe PLAGNIOL-VILLARD

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