tizen 2.3.1 release

[platform/kernel/u-boot.git] / arch / arm / cpu / arm720t / cpu.c

diff --git a/arch/arm/cpu/arm720t/cpu.c b/arch/arm/cpu/arm720t/cpu.c
index 745fccd..88c71bf 100644 (file)
--- a/arch/arm/cpu/arm720t/cpu.c
+++ b/arch/arm/cpu/arm720t/cpu.c
@@ -7,16 +7,84 @@
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Alex Zuepke <azu@sysgo.de>
  *
- * SPDX-License-Identifier:    GPL-2.0+
+ * 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
  */
 
 /*
- * cleanup_before_linux() - Prepare the CPU to jump to Linux
- *
- * This function is called just before we call Linux, it
- * prepares the processor for linux
+ * CPU specific code
  */
-int cleanup_before_linux(void)
+
+#include <common.h>
+#include <command.h>
+#include <clps7111.h>
+#include <asm/hardware.h>
+#include <asm/system.h>
+
+#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
+static void cache_flush(void);
+#endif
+
+int cleanup_before_linux (void)
 {
+       /*
+        * this function is called just before we call linux
+        * it prepares the processor for linux
+        *
+        * we turn off caches etc ...
+        * and we set the CPU-speed to 73 MHz - see start.S for details
+        */
+
+#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
+       disable_interrupts ();
+
+       /* turn off I-cache */
+       icache_disable();
+       dcache_disable();
+
+       /* flush I-cache */
+       cache_flush();
+#ifdef CONFIG_ARM7_REVD
+       /* go to high speed */
+       IO_SYSCON3 = (IO_SYSCON3 & ~CLKCTL) | CLKCTL_73;
+#endif
+#elif defined(CONFIG_NETARM) || defined(CONFIG_S3C4510B) || defined(CONFIG_LPC2292)
+       disable_interrupts ();
+       /* Nothing more needed */
+#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
+       /* No cleanup before linux for IntegratorAP/CM720T as yet */
+#else
+#error No cleanup_before_linux() defined for this CPU type
+#endif
        return 0;
 }
+
+#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
+/* flush I/D-cache */
+static void cache_flush (void)
+{
+       unsigned long i = 0;
+
+       asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+}
+#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
+       /* No specific cache setup for IntegratorAP/CM720T as yet */
+       void icache_enable (void)
+       {
+       }
+#endif