system.h

em86xx 完整启动程序,支持网络下载与串通下载

/*****************************************
 Copyright (c) 2002-2004
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the boot loader */

/*
 * system.h
 *
 * System dependent definitions
 *
 * first revision by Ho Lee 12/10/2002
 */

#ifndef __BOOTLOADER_SYSTEM_H
#define __BOOTLOADER_SYSTEM_H

/*
 * Basic type definitions 
 * for compatibility between system
 */

typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;

/*
 * Endian
 */

static __inline__ unsigned short __swap16(unsigned short x)
{
    return ((unsigned short) ((((unsigned short)(x) & 0x00ff) << 8) | 
        (((unsigned short)(x) & 0xff00) >> 8)));
}

static __inline__ unsigned int __swap32(unsigned int x)
{
    return ((unsigned int)((((unsigned int)(x) & 0x000000ffU) << 24) |
        (((unsigned int)(x) & 0x0000ff00U) <<  8) |
        (((unsigned int)(x) & 0x00ff0000U) >>  8) |
        (((unsigned int)(x) & 0xff000000U) >> 24)));
}

#undef CONFIG_BIGENDIAN
#define CONFIG_LITTLEENDIAN

#define cpu_to_le(x)            (x)
#define cpu_to_be(x)            (__swap32(x))

// alignment
static __inline__ unsigned short __read16(void *ptr)
{
    unsigned char *bp = (unsigned char *) ptr;
    return (bp[0] | (bp[1] << 8));
}

static __inline__ unsigned int __read32(void *ptr)
{
    unsigned char *bp = (unsigned char *) ptr;
    return (bp[0] | (bp[1] << 8) | (bp[2] << 16) | (bp[3] << 24));
}

static __inline__ void __write16(void *ptr, unsigned short data)
{
    unsigned char *bp = (unsigned char *) ptr;
    bp[0] = (data & 0xff);
    bp[1] = (data >> 8) & 0xff;
}

static __inline__ void __write32(void *ptr, unsigned int data)
{
    unsigned char *bp = (unsigned char *) ptr;
    bp[0] = (data & 0xff);
    bp[1] = (data >> 8) & 0xff;
    bp[2] = (data >> 16) & 0xff;
    bp[3] = (data >> 24) & 0xff;
}

#endif