mxc_nb_setup.c

来自「i.mx31 3DS平台Nandboot引导程序源码」· C语言 代码 · 共 110 行

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// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 2003, 2004 Gary Thomas
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/*!
 * @file mxc_nb_setup.c
 * 
 * @brief Kernel tags source file for NANDBoot to configure command
 * line parameters to kernel.
 *
 * @ingroup NANDboot
 */

#include "mxc_nb_setup.h"
#include "mxc_nb_uart.h"

/*!
 * Tag parameters
 */
static struct tag *params = (struct tag *)CMDLINE_ADDR;

/*!
 * To store cmdline parameters 
 */
static char cmdline[MAX_STRLEN];

/*!
 * This is initialization of  the kernel tagged list
 */
void mxcnb_setup_taglist(void)
{
        
        int i = 0;
        mxcnb_outstring("-->New command line option: \n");
        i = (int)mxcnb_getstring(cmdline);
        mxcnb_putdata('\n');
        if (i > 0) {
                mxcnb_outstring("\nCommand entered is: ");
                mxcnb_outstring(cmdline);
                mxcnb_outstring("\n");
        } else {
                mxcnb_outstring("\nCommand line options not entered ");
                return;
        }

        /* Set up parameters to pass to kernel */
        /*  CORE tag must be present & first */
        params->hdr.size = (sizeof(struct tag_core) + 
                sizeof(struct tag_header))/sizeof(U32);
        params->hdr.tag = ATAG_CORE;
        params->u.core.flags = 0;
        params->u.core.pagesize = 0;
        params->u.core.rootdev = 0;
        params = (struct tag *)((long *)params + params->hdr.size);
 
        /* Fill in the details of the memory layout */
        params->hdr.size = (sizeof(struct tag_mem32) + 
                sizeof(struct tag_header))/sizeof(U32);
        params->hdr.tag = ATAG_MEM;
        params->u.mem.start = SDRAM_BASE_ADDR;
        params->u.mem.size  = SDRAM_SIZE;
        params = (struct tag *)((long *)params + params->hdr.size);

        /* Fill for CMDline */
        params->hdr.size = (ROUNDUP(strlen(cmdline)) + 
                sizeof(struct tag_header))/sizeof(U32);
        params->hdr.tag = ATAG_CMDLINE;
        strcpy(params->u.cmdline.cmdline, cmdline);
        mxcnb_outstring(params->u.cmdline.cmdline);
        params = (struct tag *)((long *)params + params->hdr.size);
        mxcnb_outstring(params);

        /* Mark end of parameter list  */
        params->hdr.size = 0;
        params->hdr.tag = ATAG_NONE;
        mxcnb_outstring(params);
}