io.h

spi_boot_example.tar.gz可以为大家在使用 Cirrus logic的ARM9芯片是提供帮助

/*==================================================================
 *
 *  This file is part of a small Nand flash bootloader designed to
 *  be loaded via EP93xx SPI boot.
 *
 *  Copyright Cirrus Logic Corporation, 2007.  All rights reserved
 *
 ==================================================================*/

#ifndef _io_h_
#define _io_h_

#include <types.h>
#include <regs.h>

#define OUT32(val, port)	*((volatile u32 *) (port)) = (val)
#define OUT16(val, port)	*((volatile u16 *) (port)) = (val)
#define OUT8(val, port)		*((volatile u8 *) (port)) = (val)
#define IN32(port)		*((volatile u32 *) (port))
#define IN16(port)		*((volatile u16 *) (port))
#define IN8(port)		*((volatile u8 *) (port))
#define OUT32UNL(val, port)	{ *((volatile u32 *) (SWLOCK)) = 0xaa; *((volatile u32 *) (port)) = (val); }

#define SDRAM_MAP			(0x100 | SDRAM_LOCATION)
#define SDRAM_LOAD_ADDRESS		(0x00008000 | SDRAM_LOCATION)

#endif