dt_dma.h

Go to the documentation of this file.

// Copyright lowRISC contributors (OpenTitan project).
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
//
// Device table API auto-generated by `dtgen`
 
#ifndef OPENTITAN_DT_DMA_H_
#define OPENTITAN_DT_DMA_H_
 
/**
 * @file
 * @brief Device Tables (DT) for IP dma and top darjeeling.
 *
 * This file contains the type definitions and global functions of the dma.
 */
 
#include "dt_api.h"
#include <stdint.h>
 
/**
 * List of instances.
 */
typedef enum dt_dma {
  kDtDma = 0, /**< dma */
  kDtDmaFirst = 0, /**< \internal First instance */
  kDtDmaCount = 1, /**< \internal Number of instances */
} dt_dma_t;
 
/**
 * List of register blocks.
 *
 * Register blocks are guaranteed to start at 0 and to be consecutively numbered.
 */
typedef enum dt_dma_reg_block {
  kDtDmaRegBlockCore = 0, /**<  */
  kDtDmaRegBlockCount = 1, /**< \internal Number of register blocks */
} dt_dma_reg_block_t;
 
/** Primary register block (associated with the "primary" set of registers that control the IP). */
static const dt_dma_reg_block_t kDtDmaRegBlockPrimary = kDtDmaRegBlockCore;
 
/**
 * List of IRQs.
 *
 * IRQs are guaranteed to be numbered consecutively from 0.
 */
typedef enum dt_dma_irq {
  kDtDmaIrqDmaDone = 0, /**< DMA operation has been completed. */
  kDtDmaIrqDmaChunkDone = 1, /**< Indicates the transfer of a single chunk has been completed. */
  kDtDmaIrqDmaError = 2, /**< DMA error has occurred. DMA_STATUS.error_code register shows the details. */
  kDtDmaIrqCount = 3, /**< \internal Number of IRQs */
} dt_dma_irq_t;
 
/**
 * List of Alerts.
 *
 * Alerts are guaranteed to be numbered consecutively from 0.
 */
typedef enum dt_dma_alert {
  kDtDmaAlertFatalFault = 0, /**< This fatal alert is triggered when a fatal TL-UL bus integrity fault is detected. */
  kDtDmaAlertCount = 1, /**< \internal Number of Alerts */
} dt_dma_alert_t;
 
/**
 * List of clock ports.
 *
 * Clock ports are guaranteed to be numbered consecutively from 0.
 */
typedef enum dt_dma_clock {
  kDtDmaClockClk = 0, /**< Clock port clk_i */
  kDtDmaClockCount = 1, /**< \internal Number of clock ports */
} dt_dma_clock_t;
 
/**
 * List of reset ports.
 *
 * Reset ports are guaranteed to be numbered consecutively from 0.
 */
typedef enum dt_dma_reset {
  kDtDmaResetRst = 0, /**< Reset port rst_ni */
  kDtDmaResetCount = 1, /**< \internal Number of reset ports */
} dt_dma_reset_t;
 
 
/**
 * Get the dma instance from an instance ID
 *
 * For example, `dt_uart_from_instance_id(kDtInstanceIdUart3) == kDtUart3`.
 *
 * @param inst_id Instance ID.
 * @return A dma instance.
 *
 * **Note:** This function only makes sense if the instance ID has device type dma,
 * otherwise the returned value is unspecified.
 */
dt_dma_t dt_dma_from_instance_id(dt_instance_id_t inst_id);
 
/**
 * Get the instance ID of an instance.
 *
 * @param dt Instance of dma.
 * @return The instance ID of that instance.
 */
dt_instance_id_t dt_dma_instance_id(dt_dma_t dt);
 
/**
 * Get the register base address of an instance.
 *
 * @param dt Instance of dma.
 * @param reg_block The register block requested.
 * @return The register base address of the requested block.
 */
uint32_t dt_dma_reg_block(
    dt_dma_t dt,
    dt_dma_reg_block_t reg_block);
 
/**
 * Get the primary register base address of an instance.
 *
 * This is just a convenience function, equivalent to
 * `dt_dma_reg_block(dt, kDtDmaRegBlockCore)`
 *
 * @param dt Instance of dma.
 * @return The register base address of the primary register block.
 */
static inline uint32_t dt_dma_primary_reg_block(
    dt_dma_t dt) {
  return dt_dma_reg_block(dt, kDtDmaRegBlockCore);
}
 
/**
 * Get the PLIC ID of a dma IRQ for a given instance.
 *
 * If the instance is not connected to the PLIC, this function
 * will return `kDtPlicIrqIdNone`.
 *
 * @param dt Instance of dma.
 * @param irq A dma IRQ.
 * @return The PLIC ID of the IRQ of this instance.
 */
dt_plic_irq_id_t dt_dma_irq_to_plic_id(
    dt_dma_t dt,
    dt_dma_irq_t irq);
 
/**
 * Convert a global IRQ ID to a local dma IRQ type.
 *
 * @param dt Instance of dma.
 * @param irq A PLIC ID that belongs to this instance.
 * @return The dma IRQ, or `kDtDmaIrqCount`.
 *
 * **Note:** This function assumes that the PLIC ID belongs to the instance
 * of dma passed in parameter. In other words, it must be the case that
 * `dt_dma_instance_id(dt) == dt_plic_id_to_instance_id(irq)`. Otherwise, this function
 * will return `kDtDmaIrqCount`.
 */
dt_dma_irq_t dt_dma_irq_from_plic_id(
    dt_dma_t dt,
    dt_plic_irq_id_t irq);
 
 
/**
 * Get the alert ID of a dma alert for a given instance.
 *
 * **Note:** This function only makes sense if the instance is connected to the Alert Handler. For any
 * instances where the instance is not connected, the return value is unspecified.
 *
 * @param dt Instance of dma.
 * @param alert A dma alert.
 * @return The Alert Handler alert ID of the alert of this instance.
 */
dt_alert_id_t dt_dma_alert_to_alert_id(
    dt_dma_t dt,
    dt_dma_alert_t alert);
 
/**
 * Convert a global alert ID to a local dma alert type.
 *
 * @param dt Instance of dma.
 * @param alert A global alert ID that belongs to this instance.
 * @return The dma alert, or `kDtDmaAlertCount`.
 *
 * **Note:** This function assumes that the global alert ID belongs to the
 * instance of dma passed in parameter. In other words, it must be the case
 * that `dt_dma_instance_id(dt) == dt_alert_id_to_instance_id(alert)`. Otherwise,
 * this function will return `kDtDmaAlertCount`.
 */
dt_dma_alert_t dt_dma_alert_from_alert_id(
    dt_dma_t dt,
    dt_alert_id_t alert);
 
 
 
/**
 * Get the clock signal connected to a clock port of an instance.
 *
 * @param dt Instance of dma.
 * @param clk Clock port.
 * @return Clock signal.
 */
dt_clock_t dt_dma_clock(
    dt_dma_t dt,
    dt_dma_clock_t clk);
 
/**
 * Get the reset signal connected to a reset port of an instance.
 *
 * @param dt Instance of dma.
 * @param rst Reset port.
 * @return Reset signal.
 */
dt_reset_t dt_dma_reset(
    dt_dma_t dt,
    dt_dma_reset_t rst);
 
 
 
#endif  // OPENTITAN_DT_DMA_H_