static ssize_t onda_pwm_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
ssize_t status;
l4_msgtag_t tag;
l4_umword_t label;
l4_cap_idx_t comm_cap;
int value = 0;
int ipc_error;
mutex_lock(&sysfs_lock);
comm_cap = l4re_get_env_cap("comm");
/* Get a free capability slot for the comm capability */
if (l4_is_invalid_cap(comm_cap)) {
printk("Did not find an comm\n");
mutex_unlock(&sysfs_lock);
return 0;
}
/* To an L4 IPC call, i.e. send a message to thread2 and wait for a
* reply from thread2. The '1' in the msgtag denotes that we want to
* transfer one word of our message registers (i.e. MR0). No timeout. */
if (sscanf(buf,"%d\n", &value) > 0) {
l4_utcb_mr()->mr[0] = 0x67;
l4_utcb_mr()->mr[1] = value;
tag = l4_ipc_call(comm_cap, l4_utcb(), l4_msgtag(0x67, 2, 0, 0), L4_IPC_NEVER);
}
mutex_unlock(&sysfs_lock);
return size;
}
int main(void)
{
l4re_env_t *env = l4re_env(); // get environment
l4_msg_regs_t *mr = l4_utcb_mr(); // get msg regs
char *str = "Hello, world!\n";
const int str_length = 15;
mr->mr[0] = L4_VCON_WRITE_OP;
mr->mr[1] = str_length;
memcpy(&mr->mr[2], str, str_length);
l4_msgtag_t tag, ret;
tag = l4_msgtag(L4_PROTO_LOG, // long label (protocol)
6, // unsigned words
0, // unsigned items
0); // unsigned flags
ret = l4_ipc_send(env->log, // l4_cap_idx_t dest
l4_utcb(), // l4_utcb_t *utcb
tag, // l4_msgtag_t tag
L4_IPC_SEND_TIMEOUT_0); // l4_timeout_t timeout
if (l4_msgtag_has_error(ret))
fprintf(stderr, "Error in message tag.\n");
}
L4_CV void
l4sigma0_debug_dump(l4_cap_idx_t pager)
{
l4_msgtag_t tag = l4_msgtag(L4_PROTO_SIGMA0, 1, 0, 0);
l4_utcb_mr()->mr[0] = SIGMA0_REQ_DEBUG_DUMP;
l4_ipc_call(pager, l4_utcb(), tag, L4_IPC_NEVER);
}
static ssize_t onda_interval_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
ssize_t status;
l4_msgtag_t tag;
l4_umword_t label;
l4_cap_idx_t comm_cap;
int value = 0;
int ipc_error;
mutex_lock(&sysfs_lock);
comm_cap = l4re_get_env_cap("comm");
/* Get a free capability slot for the comm capability */
if (l4_is_invalid_cap(comm_cap)) {
printk("Did not find an comm\n");
mutex_unlock(&sysfs_lock);
return 0;
}
/* To an L4 IPC call, i.e. send a message to thread2 and wait for a
* reply from thread2. The '1' in the msgtag denotes that we want to
* transfer one word of our message registers (i.e. MR0). No timeout. */
l4_utcb_mr()->mr[0] = 0x56;
tag = l4_ipc_call(comm_cap, l4_utcb(), l4_msgtag(0x56, 1, 0, 0), L4_IPC_NEVER);
/* Check for IPC error, if yes, print out the IPC error code, if not,
* print the received result. */
ipc_error = l4_ipc_error(tag, l4_utcb());
if (ipc_error) {
printk("IPC error: %x\n", ipc_error);
return 0;
buf[0] = '\n';
buf[1] = '\0';
status = 1;
} else {
value = (int)(l4_utcb_mr()->mr[0]);
status = sprintf(buf, "%d\n", value);
}
mutex_unlock(&sysfs_lock);
return status;
}
int main(void)
{
l4_msgtag_t tag;
#ifdef MEASURE
l4_cpu_time_t s, e;
#endif
l4_utcb_t *u = l4_utcb();
l4_exc_regs_t exc;
l4_umword_t mr0, mr1;
printf("Alien feature testing\n");
l4_debugger_set_object_name(l4re_env()->main_thread, "alientest");
/* Start alien thread */
if (l4_is_invalid_cap(alien = l4re_util_cap_alloc()))
return 1;
l4_touch_rw(alien_thread_stack, sizeof(alien_thread_stack));
tag = l4_factory_create_thread(l4re_env()->factory, alien);
if (l4_error(tag))
return 1;
l4_debugger_set_object_name(alien, "alienth");
l4_thread_control_start();
l4_thread_control_pager(l4re_env()->main_thread);
l4_thread_control_exc_handler(l4re_env()->main_thread);
l4_thread_control_bind((l4_utcb_t *)l4re_env()->first_free_utcb, L4RE_THIS_TASK_CAP);
l4_thread_control_alien(1);
tag = l4_thread_control_commit(alien);
if (l4_error(tag))
return 2;
tag = l4_thread_ex_regs(alien,
(l4_umword_t)alien_thread,
(l4_umword_t)alien_thread_stack + sizeof(alien_thread_stack),
0);
if (l4_error(tag))
return 3;
l4_sched_param_t sp = l4_sched_param(1, 0);
tag = l4_scheduler_run_thread(l4re_env()->scheduler, alien, &sp);
if (l4_error(tag))
return 4;
#ifdef MEASURE
l4_calibrate_tsc(l4re_kip());
#endif
/* Pager/Exception loop */
if (l4_msgtag_has_error(tag = l4_ipc_receive(alien, u, L4_IPC_NEVER)))
{
printf("l4_ipc_receive failed");
return 1;
}
memcpy(&exc, l4_utcb_exc(), sizeof(exc));
mr0 = l4_utcb_mr()->mr[0];
mr1 = l4_utcb_mr()->mr[1];
for (;;)
{
#ifdef MEASURE
s = l4_rdtsc();
#endif
if (l4_msgtag_is_exception(tag))
{
#ifndef MEASURE
printf("PC=%08lx SP=%08lx Err=%08lx Trap=%lx, %s syscall, SC-Nr: %lx\n",
l4_utcb_exc_pc(&exc), exc.sp, exc.err,
exc.trapno, (exc.err & 4) ? " after" : "before",
exc.err >> 3);
#endif
tag = l4_msgtag((exc.err & 4) ? 0 : L4_PROTO_ALLOW_SYSCALL,
L4_UTCB_EXCEPTION_REGS_SIZE, 0, 0);
}
else
printf("Umm, non-handled request (like PF): %lx %lx\n", mr0, mr1);
memcpy(l4_utcb_exc(), &exc, sizeof(exc));
/* Reply and wait */
if (l4_msgtag_has_error(tag = l4_ipc_call(alien, u, tag, L4_IPC_NEVER)))
{
printf("l4_ipc_call failed\n");
return 1;
}
memcpy(&exc, l4_utcb_exc(), sizeof(exc));
mr0 = l4_utcb_mr()->mr[0];
mr1 = l4_utcb_mr()->mr[1];
#ifdef MEASURE
e = l4_rdtsc();
printf("time %lld\n", l4_tsc_to_ns(e - s));
#endif
}
