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- /*
- * 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
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