From: Ingo van Lil <inguin@gmx.de>
Date: Tue, 24 Nov 2009 13:09:21 +0000 (+0100)
Subject: Generic udelay() with watchdog support
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=3eb90bad651fab39cffba750ec4421a9c01d60e7;p=u-boot.git

Generic udelay() with watchdog support

According to the PPC reference implementation the udelay() function is
responsible for resetting the watchdog timer as frequently as needed.
Most other architectures do not meet that requirement, so long-running
operations might result in a watchdog reset.

This patch adds a generic udelay() function which takes care of
resetting the watchdog before calling an architecture-specific
__udelay().

Signed-off-by: Ingo van Lil <inguin@gmx.de>
---

diff --git a/board/armltd/integrator/timer.c b/board/armltd/integrator/timer.c
index 087cf59622..7562ffa87d 100644
--- a/board/armltd/integrator/timer.c
+++ b/board/armltd/integrator/timer.c
@@ -124,7 +124,7 @@ void set_timer (ulong ticks)
 }
 
 /* delay usec useconds */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	ulong tmo, tmp;
 
diff --git a/board/freescale/mpc8313erdb/sdram.c b/board/freescale/mpc8313erdb/sdram.c
index cb138296ba..0c4fd6854d 100644
--- a/board/freescale/mpc8313erdb/sdram.c
+++ b/board/freescale/mpc8313erdb/sdram.c
@@ -72,7 +72,7 @@ static long fixed_sdram(void)
 	 * Erratum DDR3 requires a 50ms delay after clearing DDRCDR[DDR_cfg],
 	 * or the DDR2 controller may fail to initialize correctly.
 	 */
-	udelay(50000);
+	__udelay(50000);
 
 	im->ddr.csbnds[0].csbnds = (msize - 1) >> 24;
 	im->ddr.cs_config[0] = CONFIG_SYS_DDR_CONFIG;
diff --git a/cpu/arm1136/mx31/timer.c b/cpu/arm1136/mx31/timer.c
index 29b484e448..7972ba0dd7 100644
--- a/cpu/arm1136/mx31/timer.c
+++ b/cpu/arm1136/mx31/timer.c
@@ -152,7 +152,7 @@ void set_timer (ulong t)
 }
 
 /* delay x useconds AND perserve advance timstamp value */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	unsigned long long tmp;
 	ulong tmo;
diff --git a/cpu/arm1136/omap24xx/timer.c b/cpu/arm1136/omap24xx/timer.c
index 8dd8d7b008..67547490fd 100644
--- a/cpu/arm1136/omap24xx/timer.c
+++ b/cpu/arm1136/omap24xx/timer.c
@@ -74,7 +74,7 @@ void set_timer (ulong t)
 }
 
 /* delay x useconds AND perserve advance timstamp value */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	ulong tmo, tmp;
 
diff --git a/cpu/arm1176/s3c64xx/timer.c b/cpu/arm1176/s3c64xx/timer.c
index 85ce9cd998..9768319efa 100644
--- a/cpu/arm1176/s3c64xx/timer.c
+++ b/cpu/arm1176/s3c64xx/timer.c
@@ -164,7 +164,7 @@ void set_timer(ulong t)
 	timestamp = t * (timer_load_val / (100 * CONFIG_SYS_HZ));
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	unsigned long long tmp;
 	ulong tmo;
diff --git a/cpu/arm720t/interrupts.c b/cpu/arm720t/interrupts.c
index 91d552cd28..eb8d425318 100644
--- a/cpu/arm720t/interrupts.c
+++ b/cpu/arm720t/interrupts.c
@@ -224,7 +224,7 @@ void set_timer (ulong t)
 	timestamp = t;
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	ulong tmo;
 
@@ -296,7 +296,7 @@ ulong get_timer (ulong base)
 	return timestamp - base;
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	u32 ticks;
 
diff --git a/cpu/arm920t/at91rm9200/timer.c b/cpu/arm920t/at91rm9200/timer.c
index 235d107388..9c54bbedbe 100644
--- a/cpu/arm920t/at91rm9200/timer.c
+++ b/cpu/arm920t/at91rm9200/timer.c
@@ -87,7 +87,7 @@ void set_timer (ulong t)
 	timestamp = t;
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	udelay_masked(usec);
 }
diff --git a/cpu/arm920t/imx/timer.c b/cpu/arm920t/imx/timer.c
index 31ec588d91..b06b518f03 100644
--- a/cpu/arm920t/imx/timer.c
+++ b/cpu/arm920t/imx/timer.c
@@ -89,7 +89,7 @@ void udelay_masked (unsigned long usec)
 	} while (diff >= 0);
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	udelay_masked(usec);
 }
diff --git a/cpu/arm920t/ks8695/timer.c b/cpu/arm920t/ks8695/timer.c
index 22987bc48b..886e370596 100644
--- a/cpu/arm920t/ks8695/timer.c
+++ b/cpu/arm920t/ks8695/timer.c
@@ -81,7 +81,7 @@ void set_timer(ulong t)
 	timer_ticks = t;
 }
 
-void udelay(ulong usec)
+void __udelay(ulong usec)
 {
 	ulong start = get_timer_masked();
 	ulong end;
diff --git a/cpu/arm920t/s3c24x0/timer.c b/cpu/arm920t/s3c24x0/timer.c
index cd06f6b580..fcc6c0cb1b 100644
--- a/cpu/arm920t/s3c24x0/timer.c
+++ b/cpu/arm920t/s3c24x0/timer.c
@@ -99,7 +99,7 @@ void set_timer(ulong t)
 	timestamp = t;
 }
 
-void udelay(unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	ulong tmo;
 	ulong start = get_ticks();
diff --git a/cpu/arm925t/timer.c b/cpu/arm925t/timer.c
index c16ef2577f..7dfe2b5646 100644
--- a/cpu/arm925t/timer.c
+++ b/cpu/arm925t/timer.c
@@ -81,7 +81,7 @@ void set_timer (ulong t)
 }
 
 /* delay x useconds AND preserve advance timestamp value */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	int32_t tmo = usec * (TIMER_CLOCK / 1000) / 1000;
 	uint32_t now, last = __raw_readl(CONFIG_SYS_TIMERBASE + READ_TIM);
diff --git a/cpu/arm926ejs/at91/timer.c b/cpu/arm926ejs/at91/timer.c
index 811bb3c590..7352b5c337 100644
--- a/cpu/arm926ejs/at91/timer.c
+++ b/cpu/arm926ejs/at91/timer.c
@@ -105,7 +105,7 @@ ulong get_timer_masked(void)
 	return tick_to_time(get_ticks());
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	unsigned long long tmp;
 	ulong tmo;
diff --git a/cpu/arm926ejs/davinci/timer.c b/cpu/arm926ejs/davinci/timer.c
index 7c2c208253..9da7443f30 100644
--- a/cpu/arm926ejs/davinci/timer.c
+++ b/cpu/arm926ejs/davinci/timer.c
@@ -112,7 +112,7 @@ void set_timer(ulong t)
 	timestamp = t;
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	ulong tmo;
 	ulong endtime;
diff --git a/cpu/arm926ejs/kirkwood/timer.c b/cpu/arm926ejs/kirkwood/timer.c
index 817ff4284f..2ec6a93807 100644
--- a/cpu/arm926ejs/kirkwood/timer.c
+++ b/cpu/arm926ejs/kirkwood/timer.c
@@ -125,7 +125,7 @@ void set_timer(ulong t)
 	timestamp = t;
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	uint current;
 	ulong delayticks;
diff --git a/cpu/arm926ejs/mx27/timer.c b/cpu/arm926ejs/mx27/timer.c
index 90110581ef..8f1d47bba7 100644
--- a/cpu/arm926ejs/mx27/timer.c
+++ b/cpu/arm926ejs/mx27/timer.c
@@ -177,7 +177,7 @@ void set_timer (ulong t)
 }
 
 /* delay x useconds AND preserve advance timstamp value */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	unsigned long long tmp;
 	ulong tmo;
diff --git a/cpu/arm926ejs/nomadik/timer.c b/cpu/arm926ejs/nomadik/timer.c
index 16067c900a..047b9e3513 100644
--- a/cpu/arm926ejs/nomadik/timer.c
+++ b/cpu/arm926ejs/nomadik/timer.c
@@ -59,7 +59,7 @@ ulong get_timer(ulong base)
 }
 
 /* Delay x useconds */
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	ulong ini, end;
 
diff --git a/cpu/arm926ejs/omap/timer.c b/cpu/arm926ejs/omap/timer.c
index 392b158d50..2ac38c40b7 100644
--- a/cpu/arm926ejs/omap/timer.c
+++ b/cpu/arm926ejs/omap/timer.c
@@ -80,7 +80,7 @@ void set_timer (ulong t)
 }
 
 /* delay x useconds AND perserve advance timstamp value */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	ulong tmo, tmp;
 
diff --git a/cpu/arm926ejs/versatile/timer.c b/cpu/arm926ejs/versatile/timer.c
index 50c13350a0..563db36548 100755
--- a/cpu/arm926ejs/versatile/timer.c
+++ b/cpu/arm926ejs/versatile/timer.c
@@ -109,7 +109,7 @@ void set_timer (ulong t)
 }
 
 /* delay x useconds AND perserve advance timstamp value */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	ulong tmo, tmp;
 
diff --git a/cpu/arm_cortexa8/omap3/timer.c b/cpu/arm_cortexa8/omap3/timer.c
index 12a16b3210..401bfe6d09 100644
--- a/cpu/arm_cortexa8/omap3/timer.c
+++ b/cpu/arm_cortexa8/omap3/timer.c
@@ -82,7 +82,7 @@ void set_timer(ulong t)
 }
 
 /* delay x useconds */
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	long tmo = usec * (TIMER_CLOCK / 1000) / 1000;
 	unsigned long now, last = readl(&timer_base->tcrr);
diff --git a/cpu/arm_cortexa8/s5pc1xx/timer.c b/cpu/arm_cortexa8/s5pc1xx/timer.c
index cdba5d9342..c5df5c5ab5 100644
--- a/cpu/arm_cortexa8/s5pc1xx/timer.c
+++ b/cpu/arm_cortexa8/s5pc1xx/timer.c
@@ -115,7 +115,7 @@ void set_timer(unsigned long t)
 }
 
 /* delay x useconds */
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	unsigned long tmo, tmp;
 
diff --git a/cpu/at32ap/interrupts.c b/cpu/at32ap/interrupts.c
index 75cc39e94c..c6d8d16e39 100644
--- a/cpu/at32ap/interrupts.c
+++ b/cpu/at32ap/interrupts.c
@@ -96,7 +96,7 @@ void set_timer(unsigned long t)
 /*
  * For short delays only. It will overflow after a few seconds.
  */
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	unsigned long cycles;
 	unsigned long base;
diff --git a/cpu/blackfin/interrupts.c b/cpu/blackfin/interrupts.c
index 19456e5c14..921bfe0c0f 100644
--- a/cpu/blackfin/interrupts.c
+++ b/cpu/blackfin/interrupts.c
@@ -64,7 +64,7 @@ int disable_interrupts(void)
 	return 1;
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	unsigned long delay, start, stop;
 	unsigned long cclk;
diff --git a/cpu/i386/sc520/sc520_timer.c b/cpu/i386/sc520/sc520_timer.c
index 25c9a24b70..93b5b555c3 100644
--- a/cpu/i386/sc520/sc520_timer.c
+++ b/cpu/i386/sc520/sc520_timer.c
@@ -68,7 +68,7 @@ int timer_init(void)
 	return 0;
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	int m = 0;
 	long u;
diff --git a/cpu/ixp/start.S b/cpu/ixp/start.S
index 196ba5db2e..5ebce5338c 100644
--- a/cpu/ixp/start.S
+++ b/cpu/ixp/start.S
@@ -505,8 +505,8 @@ reset_endless:
 /*
  * 0 <= r0 <= 2000
  */
-.globl udelay
-udelay:
+.globl __udelay
+__udelay:
 	mov	r2,     #0x6800
 	orr	r2, r2, #0x00db
 	mul	r0, r2, r0
diff --git a/cpu/ixp/timer.c b/cpu/ixp/timer.c
index 685614966b..edf341ff9f 100644
--- a/cpu/ixp/timer.c
+++ b/cpu/ixp/timer.c
@@ -99,7 +99,7 @@ void ixp425_udelay(unsigned long usec)
 	while (!(*IXP425_OSST & IXP425_OSST_TIMER_1_PEND));
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	while (usec--) ixp425_udelay(1);
 }
diff --git a/cpu/lh7a40x/timer.c b/cpu/lh7a40x/timer.c
index f9b5be0104..2691315d84 100644
--- a/cpu/lh7a40x/timer.c
+++ b/cpu/lh7a40x/timer.c
@@ -90,7 +90,7 @@ void set_timer (ulong t)
 	timestamp = t;
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	ulong tmo,tmp;
 
diff --git a/cpu/mcf547x_8x/slicetimer.c b/cpu/mcf547x_8x/slicetimer.c
index 67e81894af..8dc010a352 100644
--- a/cpu/mcf547x_8x/slicetimer.c
+++ b/cpu/mcf547x_8x/slicetimer.c
@@ -40,7 +40,7 @@ static ulong timestamp;
 #endif
 extern void dtimer_intr_setup(void);
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	volatile slt_t *timerp = (slt_t *) (CONFIG_SYS_UDELAY_BASE);
 	u32 now, freq;
diff --git a/cpu/pxa/timer.c b/cpu/pxa/timer.c
index e2df3a57fc..8d0f82679b 100644
--- a/cpu/pxa/timer.c
+++ b/cpu/pxa/timer.c
@@ -78,7 +78,7 @@ void set_timer (ulong t)
 	/* nop */
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	udelay_masked (usec);
 }
diff --git a/cpu/s3c44b0/timer.c b/cpu/s3c44b0/timer.c
index 34184abb73..6f1d8f677a 100644
--- a/cpu/s3c44b0/timer.c
+++ b/cpu/s3c44b0/timer.c
@@ -75,7 +75,7 @@ void set_timer (ulong t)
 	timestamp = t;
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	ulong tmo;
 
diff --git a/cpu/sa1100/timer.c b/cpu/sa1100/timer.c
index 3f77e815cb..020750125a 100644
--- a/cpu/sa1100/timer.c
+++ b/cpu/sa1100/timer.c
@@ -49,7 +49,7 @@ void set_timer (ulong t)
 	/* nop */
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	udelay_masked (usec);
 }
diff --git a/examples/api/Makefile b/examples/api/Makefile
index 04a270b450..d4c5ca2559 100644
--- a/examples/api/Makefile
+++ b/examples/api/Makefile
@@ -44,6 +44,7 @@ EXT_COBJ_FILES-$(CONFIG_API) += lib_generic/crc32.o
 EXT_COBJ_FILES-$(CONFIG_API) += lib_generic/ctype.o
 EXT_COBJ_FILES-$(CONFIG_API) += lib_generic/div64.o
 EXT_COBJ_FILES-$(CONFIG_API) += lib_generic/string.o
+EXT_COBJ_FILES-$(CONFIG_API) += lib_generic/time.o
 EXT_COBJ_FILES-$(CONFIG_API) += lib_generic/vsprintf.o
 ifeq ($(ARCH),ppc)
 EXT_SOBJ_FILES-$(CONFIG_API) += lib_ppc/ppcstring.o
diff --git a/examples/api/libgenwrap.c b/examples/api/libgenwrap.c
index 2b62badfb8..2b107d9797 100644
--- a/examples/api/libgenwrap.c
+++ b/examples/api/libgenwrap.c
@@ -74,7 +74,7 @@ void putc (const char c)
 	ub_putc(c);
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	ub_udelay(usec);
 }
diff --git a/include/asm-blackfin/delay.h b/include/asm-blackfin/delay.h
index ea0b3664e0..3af6ad3e71 100644
--- a/include/asm-blackfin/delay.h
+++ b/include/asm-blackfin/delay.h
@@ -47,7 +47,7 @@ extern __inline__ void __delay(unsigned long loops)
  * first constant multiplications gets optimized away if the delay is
  * a constant)
  */
-extern __inline__ void udelay(unsigned long usecs)
+extern __inline__ void __udelay(unsigned long usecs)
 {
 	__delay(usecs);
 }
diff --git a/include/common.h b/include/common.h
index 30a4b7affb..749d35cabe 100644
--- a/include/common.h
+++ b/include/common.h
@@ -607,11 +607,14 @@ unsigned long long get_ticks(void);
 void	wait_ticks    (unsigned long);
 
 /* lib_$(ARCH)/time.c */
-void	udelay	      (unsigned long);
+void	__udelay      (unsigned long);
 ulong	usec2ticks    (unsigned long usec);
 ulong	ticks2usec    (unsigned long ticks);
 int	init_timebase (void);
 
+/* lib_generic/time.c */
+void	udelay        (unsigned long);
+
 /* lib_generic/vsprintf.c */
 ulong	simple_strtoul(const char *cp,char **endp,unsigned int base);
 #ifdef CONFIG_SYS_64BIT_VSPRINTF
diff --git a/include/exports.h b/include/exports.h
index 2e8fd8b8b4..c3a5d2f32e 100644
--- a/include/exports.h
+++ b/include/exports.h
@@ -16,7 +16,7 @@ void install_hdlr(int, interrupt_handler_t*, void*);
 void free_hdlr(int);
 void *malloc(size_t);
 void free(void*);
-void udelay(unsigned long);
+void __udelay(unsigned long);
 unsigned long get_timer(unsigned long);
 void vprintf(const char *, va_list);
 void do_reset (void);
diff --git a/lib_generic/Makefile b/lib_generic/Makefile
index 686601cc18..7291fa3963 100644
--- a/lib_generic/Makefile
+++ b/lib_generic/Makefile
@@ -44,6 +44,7 @@ COBJS-y += sha1.o
 COBJS-$(CONFIG_SHA256) += sha256.o
 COBJS-y += string.o
 COBJS-y	+= strmhz.o
+COBJS-y += time.o
 COBJS-y += vsprintf.o
 COBJS-y += zlib.o
 COBJS-$(CONFIG_RBTREE)	+= rbtree.o
diff --git a/lib_generic/time.c b/lib_generic/time.c
new file mode 100644
index 0000000000..a309c2613a
--- /dev/null
+++ b/lib_generic/time.c
@@ -0,0 +1,43 @@
+/*
+ * (C) Copyright 2000-2009
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <watchdog.h>
+
+#ifndef CONFIG_WD_PERIOD
+# define CONFIG_WD_PERIOD	(10 * 1000 * 1000)	/* 10 seconds default*/
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+void udelay(unsigned long usec)
+{
+	ulong kv;
+
+	do {
+		WATCHDOG_RESET();
+		kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
+		__udelay (kv);
+		usec -= kv;
+	} while(usec);
+}
diff --git a/lib_i386/pcat_timer.c b/lib_i386/pcat_timer.c
index c351b23b63..1373fd125c 100644
--- a/lib_i386/pcat_timer.c
+++ b/lib_i386/pcat_timer.c
@@ -71,7 +71,7 @@ static u16 read_pit(void)
 }
 
 /* this is not very exact */
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	int counter;
 	int wraps;
diff --git a/lib_m68k/time.c b/lib_m68k/time.c
index 29269f655b..7eaea5e7f7 100644
--- a/lib_m68k/time.c
+++ b/lib_m68k/time.c
@@ -47,7 +47,7 @@ static volatile ulong timestamp = 0;
 #endif
 extern void dtimer_intr_setup(void);
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	volatile dtmr_t *timerp = (dtmr_t *) (CONFIG_SYS_UDELAY_BASE);
 	uint start, now, tmp;
@@ -139,7 +139,7 @@ void set_timer(ulong t)
 
 static unsigned short lastinc;
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_UDELAY_BASE);
 	uint tmp;
diff --git a/lib_microblaze/time.c b/lib_microblaze/time.c
index cbb43414f9..da016a0015 100644
--- a/lib_microblaze/time.c
+++ b/lib_microblaze/time.c
@@ -27,14 +27,14 @@
 #include <common.h>
 
 #ifdef CONFIG_SYS_TIMER_0
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	int i;
 	i = get_timer (0);
 	while ((get_timer (0) - i) < (usec / 1000)) ;
 }
 #else
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	unsigned int i;
 	for (i = 0; i < (usec * CONFIG_XILINX_CLOCK_FREQ / 10000000); i++);
diff --git a/lib_mips/time.c b/lib_mips/time.c
index 07e356d235..0e6644149b 100644
--- a/lib_mips/time.c
+++ b/lib_mips/time.c
@@ -70,7 +70,7 @@ void set_timer(ulong t)
 	write_c0_compare(read_c0_count() + CYCLES_PER_JIFFY);
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	unsigned int tmo;
 
diff --git a/lib_nios/time.c b/lib_nios/time.c
index 25a233ea78..d5096ee129 100644
--- a/lib_nios/time.c
+++ b/lib_nios/time.c
@@ -27,13 +27,12 @@
 
 extern void dly_clks( unsigned long ticks );
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	/* The Nios core doesn't have a timebase, so we do our
 	 * best for now and call a low-level loop that counts
 	 * cpu clocks.
 	 */
 	unsigned long cnt = (CONFIG_SYS_CLK_FREQ/1000000) * usec;
-	WATCHDOG_RESET ();	/* trigger watchdog if needed */
 	dly_clks (cnt);
 }
diff --git a/lib_nios2/time.c b/lib_nios2/time.c
index 25a233ea78..d5096ee129 100644
--- a/lib_nios2/time.c
+++ b/lib_nios2/time.c
@@ -27,13 +27,12 @@
 
 extern void dly_clks( unsigned long ticks );
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	/* The Nios core doesn't have a timebase, so we do our
 	 * best for now and call a low-level loop that counts
 	 * cpu clocks.
 	 */
 	unsigned long cnt = (CONFIG_SYS_CLK_FREQ/1000000) * usec;
-	WATCHDOG_RESET ();	/* trigger watchdog if needed */
 	dly_clks (cnt);
 }
diff --git a/lib_ppc/time.c b/lib_ppc/time.c
index 173ffab3e8..29099612db 100644
--- a/lib_ppc/time.c
+++ b/lib_ppc/time.c
@@ -23,10 +23,6 @@
 
 #include <common.h>
 
-#ifndef CONFIG_WD_PERIOD
-# define CONFIG_WD_PERIOD	(10 * 1000 * 1000)	/* 10 seconds default*/
-#endif
-
 /* ------------------------------------------------------------------------- */
 
 /*
@@ -54,16 +50,10 @@ unsigned long usec2ticks(unsigned long usec)
  * microseconds to wait) into a number of time base ticks; then we
  * watch the time base until it has incremented by that amount.
  */
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
-	ulong ticks, kv;
-
-	do {
-		kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
-		ticks = usec2ticks (kv);
-		wait_ticks (ticks);
-		usec -= kv;
-	} while(usec);
+	ulong ticks = usec2ticks (usec);
+	wait_ticks (ticks);
 }
 
 /* ------------------------------------------------------------------------- */
diff --git a/lib_sh/time.c b/lib_sh/time.c
index 52dbcd0611..9a8f89aef6 100644
--- a/lib_sh/time.c
+++ b/lib_sh/time.c
@@ -105,7 +105,7 @@ unsigned long long get_ticks (void)
 	return 0 - readl(TCNT0);
 }
 
-void udelay (unsigned long usec)
+void __udelay (unsigned long usec)
 {
 	unsigned long long tmp;
 	ulong tmo;
diff --git a/lib_sh/time_sh2.c b/lib_sh/time_sh2.c
index 5c6c9d4384..789b46f0e0 100644
--- a/lib_sh/time_sh2.c
+++ b/lib_sh/time_sh2.c
@@ -103,7 +103,7 @@ void reset_timer(void)
 	cmt_timer_start(0);
 }
 
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	unsigned long end = get_usec() + usec;
 
diff --git a/lib_sparc/time.c b/lib_sparc/time.c
index 433f3eb5a0..82b2a3abce 100644
--- a/lib_sparc/time.c
+++ b/lib_sparc/time.c
@@ -53,7 +53,7 @@ unsigned long usec2ticks(unsigned long usec)
  * microseconds to wait) into a number of time base ticks; then we
  * watch the time base until it has incremented by that amount.
  */
-void udelay(unsigned long usec)
+void __udelay(unsigned long usec)
 {
 	ulong ticks = usec2ticks(usec);