rk27xx: add rolo_restart() rk27xx specific variant

Change-Id: Ib786a9ef6318d259ecef783becdd7c0fa6f52730

firmware/SOURCES

@@ -1468,7 +1468,6 @@ target/arm/s5l8702/ipod6g/piezo-ipod6g.c
 #if CONFIG_CPU == RK27XX
 target/arm/rk27xx/kernel-rk27xx.c
 target/arm/rk27xx/system-rk27xx.c
-target/arm/rk27xx/timer-rk27xx.c
 target/arm/rk27xx/backlight-rk27xx.c
 target/arm/rk27xx/adc-rk27xx.c
 target/arm/rk27xx/sd-rk27xx.c
@@ -1478,6 +1477,8 @@ target/arm/rk27xx/usb-rk27xx.c
 target/arm/rk27xx/lcdif-rk27xx.c
 target/arm/rk27xx/rkw-loader.c
 #ifndef BOOTLOADER
+target/arm/rk27xx/timer-rk27xx.c
+target/arm/rk27xx/rolo_restart.S
 target/arm/rk27xx/pcm-rk27xx.c
 target/arm/rk27xx/debug-rk27xx.c
 #endif

firmware/target/arm/rk27xx/rolo_restart.S

@@ -0,0 +1,69 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2008 by Michael Sevakis
+ * Copyright (C) 2012 by Marcin Bukat
+ *
+ * RoLo firmware restart code for rk27xx
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include "cpu.h"
+
+/****************************************************************************
+ * void rolo_restart(const unsigned char* source, unsigned char* dest,
+ *                   int length);
+ */
+    .section    .text, "ax", %progbits
+    .align      2
+    .global     rolo_restart
+rolo_restart:
+    /* Disable cache */
+    ldr     r4, =0xefff0000
+    ldrh    r5, [r4]
+    strh    r5, [r4]
+
+    adr     r4, restart_copy_start
+    adr     r5, restart_copy_end
+    ldr     r6, =0x18200000
+    mov     r7, r6
+
+    /* Copy stub to IRAM */
+1:
+    ldr     r8, [r4], #4
+    str     r8, [r7], #4
+    cmp     r5, r4
+    bhi     1b
+
+    /* Branch to stub */
+    bx      r6
+
+restart_copy_start:
+    /* Trivial copy of firmware to final location
+     * this version assumes that src and dst are
+     * word aligned
+     */
+    mov     r4, r1
+1:
+    subs    r2, r2, #4
+    ldr     r7, [r0], #4
+    str     r7, [r4], #4
+    bge     1b
+
+    /* Branch to destination */
+    bx      r1
+restart_copy_end:
+    .size   rolo_restart,.-rolo_restart