hfrk_core_main.c

Bootload 程序

#include "dbldr_std.h"
#include "lib.h"
#include "hfrk.h"
#include "hfrk_clib.h"
#include "uart.h"
#include "hfrk_irq.h"
#include "cs8900a.h"
#include "ether.h"

#define ADJUST_DELAY            Delay(0)

extern VINT8 __bss_start[];
extern VINT8 __bss_end[];

void hfrk_init_sdram(void)
{
    VUINT32 len = &__bss_end[0] - &__bss_start[0];
    VUINT8 *ptr = (VUINT8 *)__bss_start;

    /* clear bss segment */
    if (len)
    {
        do
        {
            *(ptr++) = 0;
        } while (--len);
    }
}

void hfrk_post_init(void)
{
    /* all hardware init here */
    ChangeClockDivider(1, 1);   /* 1:2:4 */
    ChangeMPllValue(161, 3, 1); /* FCLK=203.0Mhz */
    SetClockDivider(1, 1);
    SetSysFclk(FCLK_203M);      /* to save power, use 48M */

    Port_Init();
    Isr_Init();

    uart_init(0, DEFAULT_UART_BAUD);
    uart_select(DEFAULT_UART_CHANNEL);

    MMU_Init();

    ADJUST_DELAY;

    ENABLE_MODULE_CLOCK(CLOCK_ALL);

    hfrk_init_irq();

    ether_driver = &cs8900a_ether_driver;
    ether_init();

    init_kernel_params();
}