at91rm9200_lowlevel.h revision 171426
1/*- 2 * Copyright (c) 2006 M. Warner Losh. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 * 24 * $FreeBSD: head/sys/boot/arm/at91/libat91/at91rm9200_lowlevel.h 171426 2007-07-13 14:27:05Z imp $ 25 */ 26 27#ifndef _AT91RM9200_LOWLEVEL_H_ 28#define _AT91RM9200_LOWLEVEL_H_ 29 30/* default system config parameters */ 31 32#define SDRAM_BASE 0x20000000 33 34#ifdef BOOT_KB920X 35/* The following divisor sets PLLA frequency: e.g. 10/5 * 90 = 180MHz */ 36#define OSC_MAIN_FREQ_DIV 5 /* for 10MHz osc */ 37#define SDRAM_WIDTH AT91C_SDRC_DBW_16_BITS 38typedef unsigned short sdram_size_t; 39#define OSC_MAIN_MULT 90 40#endif 41 42#ifdef BOOT_CENTIPAD 43/* The following divisor sets PLLA frequency: e.g. 10/5 * 90 = 180MHz */ 44#define OSC_MAIN_FREQ_DIV 5 /* for 10MHz osc */ 45#define SDRAM_WIDTH AT91C_SDRC_DBW_16_BITS 46typedef unsigned short sdram_size_t; 47#define OSC_MAIN_MULT 90 48#endif 49 50#ifdef BOOT_BWCT 51/* The following divisor sets PLLA frequency: e.g. 16/4 * 45 = 180MHz */ 52#define OSC_MAIN_FREQ_DIV 4 /* for 16MHz osc */ 53#define SDRAM_WIDTH AT91C_SDRC_DBW_32_BITS 54typedef unsigned int sdram_size_t; 55#define OSC_MAIN_MULT 45 56#endif 57 58#ifdef BOOT_TSC 59/* The following divisor sets PLLA frequency: e.g. 16/4 * 45 = 180MHz */ 60#define OSC_MAIN_FREQ_DIV 4 /* for 16MHz osc */ 61#define SDRAM_WIDTH AT91C_SDRC_DBW_32_BITS 62typedef unsigned int sdram_size_t; 63#define OSC_MAIN_MULT 45 64#endif 65 66/* Master clock frequency at power-up */ 67#define AT91C_MASTER_CLOCK 60000000 68 69/* #define GetSeconds() (AT91C_BASE_RTC->RTC_TIMR & AT91C_RTC_SEC) */ 70#define GetSeconds() (AT91C_BASE_ST->ST_CRTR >> 15) 71 72extern void _init(void); 73 74#endif /* _AT91RM9200_LOWLEVEL_H_ */ 75