davinci, c6x: Always use C version of reset code

We can safely use the same reset code written in C for both Davinci and
C6X platforms.  In addition the C version of the code is marginally
smaller on Davinci.

Tested-by: Matt Porter <mporter@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>

arch/arm/cpu/arm926ejs/davinci/Makefile

@@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).o
 
-COBJS-y				+= cpu.o misc.o timer.o psc.o pinmux.o
+COBJS-y				+= cpu.o misc.o timer.o psc.o pinmux.o reset.o
 COBJS-$(CONFIG_DA850_LOWLEVEL)	+= da850_lowlevel.o
 COBJS-$(CONFIG_SOC_DM355)	+= dm355.o
 COBJS-$(CONFIG_SOC_DM365)	+= dm365.o
@@ -42,8 +42,6 @@ COBJS-$(CONFIG_SOC_DM365)	+= dm365_lowlevel.o
 COBJS-$(CONFIG_SOC_DA8XX)	+= da850_lowlevel.o
 endif
 
-SOBJS	= reset.o
-
 ifndef CONFIG_SKIP_LOWLEVEL_INIT
 SOBJS	+= lowlevel_init.o
 endif

arch/arm/cpu/arm926ejs/davinci/reset.S

-/*
- * Processor reset using WDT for TI TMS320DM644x SoC.
- *
- * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
- *
- * -----------------------------------------------------
- *
- * 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
- */
-
-.globl reset_cpu
-reset_cpu:
-	ldr	r0, WDT_TGCR
-	mov	r1, $0x08
-	str	r1, [r0]
-	ldr	r1, [r0]
-	orr	r1, r1, $0x03
-	str	r1, [r0]
-	mov	r1, $0
-	ldr	r0, WDT_TIM12
-	str	r1, [r0]
-	ldr	r0, WDT_TIM34
-	str	r1, [r0]
-	ldr	r0, WDT_PRD12
-	str	r1, [r0]
-	ldr	r0, WDT_PRD34
-	str	r1, [r0]
-	ldr	r0, WDT_TCR
-	ldr	r1, [r0]
-	orr	r1, r1, $0x40
-	str	r1, [r0]
-	ldr	r0, WDT_WDTCR
-	ldr	r1, [r0]
-	orr	r1, r1, $0x4000
-	str	r1, [r0]
-	ldr	r1, WDTCR_VAL1
-	str	r1, [r0]
-	ldr	r1, WDTCR_VAL2
-	str	r1, [r0]
-	/* Write an invalid value to the WDKEY field to trigger
-	 * an immediate watchdog reset */
-	mov     r1, $0x4000
-	str     r1, [r0]
-	nop
-	nop
-	nop
-	nop
-reset_cpu_loop:
-	b	reset_cpu_loop
-
-WDT_TGCR:
-	.word	0x01c21c24
-WDT_TIM12:
-	.word	0x01c21c10
-WDT_TIM34:
-	.word	0x01c21c14
-WDT_PRD12:
-	.word	0x01c21c18
-WDT_PRD34:
-	.word	0x01c21c1c
-WDT_TCR:
-	.word	0x01c21c20
-WDT_WDTCR:
-	.word	0x01c21c28
-WDTCR_VAL1:
-	.word	0xa5c64000
-WDTCR_VAL2:
-	.word	0xda7e4000

arch/arm/cpu/arm926ejs/davinci/reset.c

+/*
+ *  Processor reset using WDT.
+ *
+ * Copyright (C) 2012 Dmitry Bondar <bond@inmys.ru>
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * This file is released under the terms of GPL v2 and any later version.
+ * See the file COPYING in the root directory of the source tree for details.
+*/
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/timer_defs.h>
+#include <asm/arch/hardware.h>
+
+void reset_cpu(unsigned long a)
+{
+	struct davinci_timer *const wdttimer =
+		(struct davinci_timer *)DAVINCI_TIMER1_BASE;
+	writel(0x08, &wdttimer->tgcr);
+	writel(readl(&wdttimer->tgcr) | 0x03, &wdttimer->tgcr);
+	writel(0, &wdttimer->tim12);
+	writel(0, &wdttimer->tim34);
+	writel(0, &wdttimer->prd12);
+	writel(0, &wdttimer->prd34);
+	writel(readl(&wdttimer->tcr) | 0x40, &wdttimer->tcr);
+	writel(readl(&wdttimer->wdtcr) | 0x4000, &wdttimer->wdtcr);
+	writel(0xa5c64000, &wdttimer->wdtcr);
+	writel(0xda7e4000, &wdttimer->wdtcr);
+	writel(0x4000, &wdttimer->wdtcr);
+	while (1)
+		/*nothing*/;
+}