/* * dspapps/apps/mmap/arm/mmaptest.c * * ARM-side frontent program for mmap test * * Copyright (C) 2004-2005 Nokia Corporation * * Written by Hiroo Ishikawa <ext-hiroo.ishikawa@nokia.com> * Written by Toshihiro Kobayashi <toshihiro.kobayashi@nokia.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * 2004/06/30:  DSP Gateway version 3.3 */#include <unistd.h>#include <fcntl.h>#include <sys/mman.h>#include <sys/time.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/ioctl.h>/* * This test writes numbers at randam position in the mapped area. */#define PROG_NAME	"mmaptest"int g_sticky;void usage(void){	fprintf(stderr, "usage: %s [-h] [-sticky]\n", PROG_NAME);}void read_arg(int argc, char *argv[]){	int i;	g_sticky = 0;	for (i = 1; i < argc; i++) {		if (!strcmp(argv[i], "-h")) {			usage();			exit(0);		} else if (!strcmp(argv[i], "-sticky")) {			g_sticky = 1;		} else {			usage();			exit(1);		}	}}int main(int argc, char *argv[]){	unsigned short *addr;	#define ALEN	8	unsigned short array[ALEN] = { 1234, 1, 2, 3, 4, 5, 6, 7 };	unsigned short cmdbuf[2];	#define OFF	702	/* arbitrary */	unsigned short len;	unsigned short off;	int dsp_fd;	int i;	read_arg(argc, argv);	if ((dsp_fd = open("/dev/dsptask/mmap", O_RDWR)) < 0) {		perror("open");		return -1;	}	printf("[ARM] mmapping...\n");	addr = (unsigned short *)mmap(NULL, 4096, PROT_READ | PROT_WRITE, 				      MAP_SHARED, dsp_fd, 0);	if ((int)addr < 0) {		perror("mmap");		return -1;	}	printf("[ARM] mmapped address in user space = %p\n", addr);		printf("[ARM] copying data to the mmapped area:\n"	       "      offset = %d, len = %d\n", OFF, ALEN);	memcpy(&addr[OFF], array, ALEN * sizeof(short));	for (i = 0; i < ALEN; i++) {		printf("[ARM] addr[%d] = %d\n", OFF+i, addr[OFF+i]);	}	printf("\n"	       "[ARM] inform DSP that we have written the data "	       "to the shared buffer...\n");	cmdbuf[0] = OFF;	/* offset within the mmapped space */	cmdbuf[1] = ALEN;	/* len (in word count) */	if (write(dsp_fd, cmdbuf, 4) < 0) {		perror("write");		return -1;	}	printf("\n"	       "[ARM] Then, wait for DSP until it modifies the data.\n");	if (read(dsp_fd, cmdbuf, 4) < 0) {		perror("read");		return -1;	}	off = cmdbuf[0];	len = cmdbuf[1];	printf("\n"	       "[ARM] received: offset = %d, len = %d\n", off, len);	for (i = 0; i < len; i++) {		printf("[ARM] addr[%d] = %d\n", off+i, addr[off+i]);	}	if (g_sticky)		getchar();	munmap(addr, 4096);	close(dsp_fd);	return 0;}