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:		pb1000/platform.c
 *
 * Purpose:		Platform glue code
 *
 * Notes:
 *
 * Author:		Eric DeVolder
 * Date:		Jan-7-2002
 *
 * Modifications:
 *
 */

#include "example.h"

/********************************************************************/
//                       Boot Image Locations                       //
static
const char *const flashAddresses[] = { "BE000000",
    0
};
static
const char *const fileNames[] = {
    "pb1000.bin",
    "pb1000.elf",
    "nk.bin",
    "vmlinux.elf",
    "vmlinux.rec",
    0
};

static
const void *const jumpAddress = 0x0;
/********************************************************************/

void platformInit(void)
{
#define static_config3 (*(volatile long *)0xb4001030)
#define static_timing3 (*(volatile long *)0xb4001034)
#define static_address3 (*(volatile long *)0xb4001038)

    /* YAMON didn't do this... */
    static_config3 = 0x00000002;	// type = PCMCIA
    static_timing3 = 0x280e3a07;	// 40 cycle strobe, 7 cycle setup
    static_address3 = 0x10000000;	// any PCMCIA select

    DPRINTF("Pb1000 platformInit() \n");

    /* pin_func: guarantee GPIO6 as GPIO */
    wrReg(0xB190002C, 0);

}

/********************************************************************/
void au1_sleep(void)
{
    /* FIX!!! This is incomplete, as the SDRAM should be put to Sleep */

    /*
     * Setup GPIO6 (pushbutton S8 on Pb1000)
     */
    /* pin_func: guarantee GPIO6 as GPIO */
    wrReg(0xB190002C, 0);

    /* Enable GPIO6 as input */
    wrReg(0xb1900110, 0);

    /* wakeup_source: Allow GPIO6 to cause wakeup */
    wrReg(0xB1900034, 0x0040);

    /* wakeup_cause: clear it */
    wrReg(0xB190005C, ~0);

    /*
     * Prepare power supply for Sleep
     */
    wrReg(0xB1900078, 0);

    /*
     * Put Au1000 into Sleep
     */
    wrReg(0xB190007C, 0);
}

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

int
platformGetBootData(const char *const **files,
		    const char *const **addresses, const void **jump)
{
    *files = fileNames;
    *addresses = flashAddresses;
    *jump = jumpAddress;
    return 1;
}