platform.c

RMI的处理器au1200系列所用的BOOTLOAD,包括SD卡启动USB启动硬盘启动网络启动,并初始化硬件的所有参数,支持内核调试.

/*
 * File:		pb1550/platform.c
 *
 * Purpose:		Platform glue code
 *
 * Notes:
 *
 * Author:		Eric DeVolder
 * Date:		Jan-26-2004
 *
 * Modifications:
 *
 */

#include "example.h"

/********************************************************************/
//                       Boot Image Locations                       //
static
const char *const flashAddresses[] = { "BE000000",
    "Nand|7D0",			//Nand flash, block 2000
    0
};
static
const char *const fileNames[] = {
    "ficmmp.rec",
    0
};

static
const char *const fileNames_backup[] = {
    "ficbak.rec",
    0
};

static
const void *const jumpAddress = 0x0;

static uint16 config_value = 0;
static volatile uint16 *ficmmp_config =
    (uint16 *) KSEG1(FICMMP_CONFIG_PHYS_ADDR);
/********************************************************************/

void platformInit(void)
{
    //DPRINTF("FIC platformInit() \n");
    //platformConfigInit();
}

/********************************************************************/

int
platformGetBootData(const char *const **files,
		    const char *const **addresses, const void **jump)
{
    if (gpioRead(12) == 0 && gpioRead(1) == 0)
	*files = fileNames_backup;
    else
	*files = fileNames;
    *addresses = flashAddresses;
    *jump = jumpAddress;
    return 1;
}

void platformSetConfigBits(uint16 bits)
{
    DPRINTF("value: %X, bits: %X, new value: %X\n", config_value, bits,
	    config_value | bits);
    config_value |= bits;
    *ficmmp_config = config_value;
}

void platformClearConfigBits(uint16 bits)
{
    DPRINTF("value: %X, bits: %X, new value: %X\n", config_value, bits,
	    config_value & ~bits);
    config_value &= ~bits;
    *ficmmp_config = config_value;
}

uint16 platformGetConfigValue()
{
    DPRINTF("value: %X\n", config_value);
    return config_value;
}

void platformConfigInit()
{
    DPRINTF("\n");
    config_value = 0;
    gpioWrite(FICMMP_CONFIG_ENABLE, 0);	//Enable configuration latch
    platformSetConfigBits(FICMMP_CONFIG_LCMDATAOUT | FICMMP_CONFIG_TVODATAOUT);	//Disable display data buffers
}