src/pru_loader.c

   1 /*
   2  * Copyright (c) 2016, Ian Sutton <ian@kremlin.cc>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for
   5  * any purpose with or without fee is hereby granted, provided that the
   6  * above copyright notice and this permission notice appear in all
   7  * copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
  10  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
  11  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
  12  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  13  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  14  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  15  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16  * PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <errno.h>
  23
  24 #include <pruss/prussdrv.h>
  25 #include <pruss/pruss_intc_mapping.h>
  26
  27 int main(int argc, char *argv[]) {
  28
  29         tpruss_intc_initdata init_data = PRUSS_INTC_INITDATA;
  30
  31         if(argc < 2) {
  32             printf("usage: %s <obj>\n", argv[0]);
  33             return EINVAL;
  34         } else if(geteuid()) {
  35             printf("%s\n", "run as root");
  36             return EACCES;
  37         }
  38
  39         /* init pru drv */
  40         if(prussdrv_init())
  41             return ENXIO;
  42
  43         /* open, bind intr */
  44         if(prussdrv_open(PRU_EVTOUT_0))
  45             return ENXIO;
  46         if(prussdrv_pruintc_init(&init_data))
  47             return ENXIO;
  48
  49         /* exec */
  50         if(prussdrv_exec_program(0, argv[1]))
  51             return ENXIO;
  52
  53         /* block until intr */
  54         prussdrv_pru_wait_event(PRU_EVTOUT_0);
  55
  56         /* clean up, halt & disable pru, terminate pru drv */
  57         prussdrv_pru_clear_event(PRU_EVTOUT_0, PRU0_ARM_INTERRUPT);
  58         prussdrv_pru_disable(0);
  59         prussdrv_exit();
  60
  61         return 0;
  62 }
  63