source: svn/trunk/newcon3bcm2_21bu/dta/src/jar/jar_main.c

/***************************************************************************
 *     Copyright (c) 2003-2010, Broadcom Corporation
 *     All Rights Reserved
 *     Confidential Property of Broadcom Corporation
 *
 *  THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED SOFTWARE LICENSE
 *  AGREEMENT  BETWEEN THE USER AND BROADCOM.  YOU HAVE NO RIGHT TO USE OR
 *  EXPLOIT THIS MATERIAL EXCEPT SUBJECT TO THE TERMS OF SUCH AN AGREEMENT.
 *
 * $brcm_Workfile: $
 * $brcm_Revision: $
 * $brcm_Date: $
 *
 * Module Description:
 *
 * Revision History:
 *
 * $brcm_Log: $
 * 
 *
 ***************************************************************************/

#include "fast_heap.h"
#include "zlib.h"

#define RAM_TEXT_BASE 0x80016000
#define RAM_TEXT_SIZE 0x01000000

extern void clear_all_d_cache(void);
extern void invalidate_all_i_cache(void);

static int decompress(unsigned char *in_buf, unsigned int in_size, unsigned char * out_buf, unsigned int out_size);
static void run_compressed(unsigned char * data, unsigned int len);

extern unsigned int comp_size;
extern unsigned int _edata;
extern unsigned int _end;

void bcm_main(void)
{
    unsigned char * compressed_image;
    unsigned int compressed_size;

    fast_heap_init((unsigned long)&_end);

    compressed_size = (unsigned int) &comp_size;
    compressed_image = (unsigned char *) &_edata;
    run_compressed(compressed_image, compressed_size);
    while(1);
}

void *memset(void *dest,int c,size_t count)
{
    uint8_t *d = dest;
    for(;count>0;count--) {
        *d++ = c;
    }
    return dest;
}

typedef void (*entry_t)(void);

void run_compressed(unsigned char * data, unsigned int len)
{
    int rc;
    unsigned char * text;
    entry_t entry;

    text = (unsigned char *)RAM_TEXT_BASE;
    rc = decompress(data, len, text, RAM_TEXT_SIZE);
    if(rc > 0){
        entry = (entry_t) RAM_TEXT_BASE;
        clear_all_d_cache();
        invalidate_all_i_cache();
        entry();
    }
}

int decompress(unsigned char *in_buf, unsigned int in_size, unsigned char * out_buf, unsigned int out_size)
{
    z_stream strm;
    int ret;

    memset(&strm,0,sizeof(strm));
    strm.avail_in = in_size;
    strm.next_in = in_buf;
    strm.avail_out = out_size;
    strm.next_out = out_buf;
    ret = inflateInit2(&strm, 15+32);
    if (ret == Z_OK)
    {
        ret = inflate(&strm, Z_FINISH);
        inflateEnd(&strm);
        if ((ret == Z_STREAM_END) || (ret == Z_OK))
        {
            return strm.total_out;
        }
        else if (ret > 0)
        {
            return -ret;
        }
    }
    return ret;
}

/* Please do not remove! */
/* Local Variables: */
/* mode: C */
/* indent-tabs-mode: nil */
/* End: */