Hello to everyone! I am struggling to make this work, let me share my efforts to make the mutex work between a NIOS2-MMU Linux and a NIOS2- w/o LINUX
My NIOS2 NO-LINUX is running this program:
int main()
{
alt_putstr("Proc 2!\n");
/* get the mutex device handle */
alt_mutex_dev* mutex = altera_avalon_mutex_open( "/dev/mutex" );
/* acquire the mutex, setting the value to one */
altera_avalon_mutex_trylock( mutex, 1 );
while(1){
if(altera_avalon_mutex_is_mine(mutex))
{
usleep(100);
alt_printf("%x\n", IORD_32DIRECT(SHARED_MEM_BASE, 0x00));
}
altera_avalon_mutex_unlock( mutex );
}
return 0;
}
My Device Driver of the MMU Linux is written here:
http://pastebin.com/gwlfqawv However it is'nt working. When i boot my Linux it says that my Mutex
is at the adress e0000001c4, i dont understand why it has this "e" in
the front of the adress? Also it isn't locking because when i lock in
Linux i still can lock/unlock at NIOS2-NOLINUX
outl(0x00000001, shmem.mutex);
if (inl(shmem.mutex) == 0x00000001) {printk(KERN_INFO "locked\n"); return 1;}
I get the locked message at Linux, however the mutex isnt locking.
Any help is appreciated
