l1.c

用于TM1300/PNX1300系列DSP（主要用于视频处理）的下载程序

/*
 * Copyright (c) 1995,2000 TriMedia Technologies Inc.             
 *
 * +------------------------------------------------------------------+
 * | This software is furnished under a license and may only be used  |
 * | and copied in accordance with the terms and conditions of  such  |
 * | a license and with the inclusion of this copyright notice. This  |
 * | software or any other copies of this software may not be provided|
 * | or otherwise made available to any other person.  The ownership  |
 * | and title of this software is not transferred.                   |
 * |                                                                  |
 * | The information in this software is subject  to change without   |
 * | any  prior notice and should not be construed as a commitment by |
 * | TriMedia Technologies.                                           |
 * |                                                                  |
 * | this code and information is provided "as is" without any        |
 * | warranty of any kind, either expressed or implied, including but |
 * | not limited to the implied warranties of merchantability and/or  |
 * | fitness for any particular purpose.                              |
 * +------------------------------------------------------------------+
 *
 *  Module name              : L1.c    1.3
 *
 *  Last update              : 16:53:00 - 00/06/16
 *
 *  Description              :
 *
 *      This program is a simulation of the L1 boot program on tmsim,
 *      but modified such that it loads 5 megabytes below the top of
 *      SDRAM. In this area it loads the multiprocessor downloader.
 *
 */

#include "tm1/mmio.h"
#include "tmlib/TMDownLoader.h"
#include "tmlib/tmlibc.h"
#include "assert.h"
#include "stdio.h"

void        _syscall();
custom_op void iclr(void);

extern          Int     _host_type_init[];
extern          Int     _clock_freq_init[];
extern volatile UInt32	_MMIO_base_init[];



typedef void (*Func) ();


main()
{
	String      filename = "MP_downloader.out";
	UInt        sdram_length = 4000000;
	Pointer     sdram_base = (Pointer) ((((UInt) & filename) - 5000000)
					    & 0xffffff00);
	Int         alignment, minimal_image_size;
	TMDwnLdr_Object_Handle handle;

	printf("Loading %s in 0x%08x - 0x%08x...\n", filename, sdram_base, ((UInt) sdram_base) + sdram_length);

	TMDwnLdr_load_object_from_file(filename, Null, &handle);

	TMDwnLdr_get_image_size(handle, &minimal_image_size, &alignment);
	assert(minimal_image_size < (Int) sdram_base + sdram_length);
	assert((Int) sdram_base % alignment == 0);

	TMDwnLdr_resolve_symbol(handle, "__syscall", (Int) _syscall);

	TMDwnLdr_relocate(handle, (tmHostType_t) _host_type_init,
			  (Address) _MMIO_base_init,
			  (UInt) _clock_freq_init,
			  sdram_base, sdram_length,
			  TMDwnLdr_LeaveCachingToDownloader);

	TMDwnLdr_get_memory_image(handle, sdram_base);

	TMDwnLdr_unload_object(handle);


	printf("Running %s...\n", filename);

	_cache_copyback(sdram_base, sdram_length);
	iclr();

	((Func) sdram_base) ();
	/* never come back */
}