drivers/remoteproc/pru_rproc.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
   2 /*
   3  * PRUSS Remote Processor specific types
   4  *
   5  * Copyright (C) 2014-2020 Texas Instruments Incorporated - https://www.ti.com/
   6  *      Suman Anna <s-anna@ti.com>
   7  */
   8
   9 #ifndef _PRU_RPROC_H_
  10 #define _PRU_RPROC_H_
  11
  12 /**
  13  * struct pruss_int_map - PRU system events _to_ channel and host mapping
  14  * @event: number of the system event
  15  * @chnl: channel number assigned to a given @event
  16  * @host: host number assigned to a given @chnl
  17  *
  18  * PRU system events are mapped to channels, and these channels are mapped
  19  * to host interrupts. Events can be mapped to channels in a one-to-one or
  20  * many-to-one ratio (multiple events per channel), and channels can be
  21  * mapped to host interrupts in a one-to-one or many-to-one ratio (multiple
  22  * channels per interrupt).
  23  */
  24 struct pruss_int_map {
  25         u8 event;
  26         u8 chnl;
  27         u8 host;
  28 };
  29
  30 /**
  31  * struct pru_irq_rsc - PRU firmware section header for IRQ data
  32  * @type: resource type
  33  * @num_evts: number of described events
  34  * @pru_intc_map: PRU interrupt routing description
  35  *
  36  * The PRU firmware blob can contain optional .pru_irq_map ELF section, which
  37  * provides the PRUSS interrupt mapping description. The pru_irq_rsc struct
  38  * describes resource entry format.
  39  */
  40 struct pru_irq_rsc {
  41         u8 type;
  42         u8 num_evts;
  43         struct pruss_int_map pru_intc_map[];
  44 } __packed;
  45
  46 #endif  /* _PRU_RPROC_H_ */