Add board support for armadillo HT1070
Patch by Rowel Atienza, 06 Apr 2005
diff --git a/board/armadillo/lowlevel_init.S b/board/armadillo/lowlevel_init.S
new file mode 100644
index 0000000..6cf6426
--- /dev/null
+++ b/board/armadillo/lowlevel_init.S
@@ -0,0 +1,66 @@
+/*
+ * Initialization stuff - taken from hermit
+ * (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
+ * Armadillo board HT1070
+ *
+ * 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 <config.h>
+#include <version.h>
+
+
+/* some parameters for the board */
+/* setting up the memory */
+#define SRAM_START 0x60000000
+#define SRAM_SIZE 0x0000c000
+
+.globl lowlevel_init
+lowlevel_init:
+ mov r0, #0x70 /* 32-bit code + data, MMU mandatory */
+ mcr p15, 0, r0, c1, c0, 0 /* MMU init */
+
+ mov r0, #0
+ mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
+ mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
+
+ mov r0, #0x80000000 /* I/O base */
+
+ mov r1, #0x6 /* CLKCTL_73 in SYSCON3 */
+ add r2, r0, #0x2200 /* address of SYSCON3 in r2 */
+ str r1, [r2] /* set clock speed to 73.728 MHz */
+
+ mov r1, #0x81 /* 64KHz DRAM refresh period */
+ str r1, [r0, #0x200] /* set DRFPR */
+
+ mov r1, #0x500 /* permanent enable, 16bits wide */
+ add r1, r1, #0x42 /* 128Mbit, CAS lat = 2 SDRAM */
+ add r2, r0, #0x2300 /* load address in r2 */
+ str r1, [r2]
+
+ mov r1, #0x100 /* SDRAM refresh rate */
+ add r2, r0, #0x2340 /* load address in r2 */
+ str r1, [r2]
+
+ mov sp, #SRAM_START /* init stack pointer */
+ add sp, sp, #SRAM_SIZE
+
+ /* everything is fine now */
+ mov pc, lr