[U-Boot] [PATCH] s3c64xx: move the reset_cpu function
Minkyu Kang
mk7.kang at samsung.com
Thu Jun 25 12:21:33 CEST 2009
Because of the reset_cpu is soc specific, should be move to soc
And read reset value from SYS_ID register instead of hard code
this patch also supports s3c6410
Signed-off-by: Minkyu Kang <mk7.kang at samsung.com>
---
cpu/arm1176/cpu.c | 16 ----------------
cpu/arm1176/s3c64xx/Makefile | 2 ++
cpu/arm1176/s3c64xx/reset.S | 34 ++++++++++++++++++++++++++++++++++
3 files changed, 36 insertions(+), 16 deletions(-)
create mode 100644 cpu/arm1176/s3c64xx/reset.S
diff --git a/cpu/arm1176/cpu.c b/cpu/arm1176/cpu.c
index c59a77b..d1a3327 100644
--- a/cpu/arm1176/cpu.c
+++ b/cpu/arm1176/cpu.c
@@ -58,22 +58,6 @@ int cleanup_before_linux (void)
return 0;
}
-
-/* * reset the cpu by setting up the watchdog timer and let him time out */
-void reset_cpu (ulong ignored)
-{
- printf("reset... \n\n\n");
- SW_RST_REG = 0x6400;
- /* loop forever and wait for reset to happen */
- while (1) {
- if (serial_tstc()) {
- serial_getc();
- break;
- }
- }
- /*NOTREACHED*/
-}
-
/* flush I/D-cache */
static void cache_flush (void)
{
diff --git a/cpu/arm1176/s3c64xx/Makefile b/cpu/arm1176/s3c64xx/Makefile
index 4656d9a..b527939 100644
--- a/cpu/arm1176/s3c64xx/Makefile
+++ b/cpu/arm1176/s3c64xx/Makefile
@@ -28,6 +28,8 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).a
+SOBJS = reset.o
+
COBJS-$(CONFIG_S3C6400) += cpu_init.o speed.o
COBJS-y += timer.o
diff --git a/cpu/arm1176/s3c64xx/reset.S b/cpu/arm1176/s3c64xx/reset.S
new file mode 100644
index 0000000..3756d85
--- /dev/null
+++ b/cpu/arm1176/s3c64xx/reset.S
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2009 Samsung Electronics.
+ * Minkyu Kang <mk7.kang at samsung.com>
+ *
+ * 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 <s3c6400.h>
+
+.globl reset_cpu
+reset_cpu:
+ ldr r1, =ELFIN_CLOCK_POWER_BASE
+ ldr r2, [r1, #SYS_ID_OFFSET]
+ ldr r3, =0xffff
+ and r2, r3, r2, lsr #12
+ str r2, [r1, #SW_RST_OFFSET]
+_loop_forever:
+ b _loop_forever
--
1.5.4.3
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