dif_entropy_src_autogen.h

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// Copyright lowRISC contributors (OpenTitan project).
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
 
#ifndef OPENTITAN_SW_DEVICE_LIB_DIF_AUTOGEN_DIF_ENTROPY_SRC_AUTOGEN_H_
#define OPENTITAN_SW_DEVICE_LIB_DIF_AUTOGEN_DIF_ENTROPY_SRC_AUTOGEN_H_
 
// THIS FILE HAS BEEN GENERATED, DO NOT EDIT MANUALLY. COMMAND:
// util/make_new_dif.py --mode=regen --only=autogen
 
/**
 * @file
 * @brief <a href="/book/hw/ip/entropy_src/">ENTROPY_SRC</a> Device Interface
 * Functions
 */
 
#include <stdbool.h>
#include <stdint.h>
 
#include "sw/device/lib/base/macros.h"
#include "sw/device/lib/base/mmio.h"
#include "sw/device/lib/dif/dif_base.h"
 
#ifdef __cplusplus
extern "C" {
#endif  // __cplusplus
 
/**
 * A handle to entropy_src.
 *
 * This type should be treated as opaque by users.
 */
typedef struct dif_entropy_src {
  /**
   * The base address for the entropy_src hardware registers.
   */
  mmio_region_t base_addr;
} dif_entropy_src_t;
 
/**
 * Creates a new handle for a(n) entropy_src peripheral.
 *
 * This function does not actuate the hardware.
 *
 * @param base_addr The MMIO base address of the entropy_src peripheral.
 * @param[out] entropy_src Out param for the initialized handle.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_init(mmio_region_t base_addr,
                                  dif_entropy_src_t *entropy_src);
 
/**
 * A entropy_src alert type.
 */
typedef enum dif_entropy_src_alert {
  /**
   * This alert is triggered upon the alert health test threshold criteria not
   * met.
   */
  kDifEntropySrcAlertRecovAlert = 0,
  /**
   * This alert triggers for any condition detected in the !!ERR_CODE register,
   * which includes FIFO errors, COUNTER errors, FSM state errors, and also when
   * integrity failures are detected on the TL-UL bus.
   */
  kDifEntropySrcAlertFatalAlert = 1,
} dif_entropy_src_alert_t;
 
/**
 * Forces a particular alert, causing it to be escalated as if the hardware
 * had raised it.
 *
 * @param entropy_src A entropy_src handle.
 * @param alert The alert to force.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_alert_force(const dif_entropy_src_t *entropy_src,
                                         dif_entropy_src_alert_t alert);
 
/**
 * A entropy_src interrupt request type.
 */
typedef enum dif_entropy_src_irq {
  /**
   * Asserted when entropy source bits are available for firmware for
   * consumption via !!ENTROPY_DATA register.
   */
  kDifEntropySrcIrqEsEntropyValid = 0,
  /**
   * Asserted whenever the main state machine is in the alert state, e.g., due
   * to health tests failing and reaching the threshold value configured in
   * !!ALERT_THRESHOLD.
   */
  kDifEntropySrcIrqEsHealthTestFailed = 1,
  /**
   * Asserted when the observe FIFO has filled to the configured threshold level
   * (see !!OBSERVE_FIFO_THRESH).
   */
  kDifEntropySrcIrqEsObserveFifoReady = 2,
  /**
   * Asserted when an fatal error condition is met, e.g., upon FIFO errors, or
   * if an illegal state machine state is reached.
   */
  kDifEntropySrcIrqEsFatalErr = 3,
} dif_entropy_src_irq_t;
 
/**
 * A snapshot of the state of the interrupts for this IP.
 *
 * This is an opaque type, to be used with the `dif_entropy_src_irq_get_state()`
 * and `dif_entropy_src_irq_acknowledge_state()` functions.
 */
typedef uint32_t dif_entropy_src_irq_state_snapshot_t;
 
/**
 * Returns the type of a given interrupt (i.e., event or status) for this IP.
 *
 * @param entropy_src A entropy_src handle.
 * @param irq An interrupt request.
 * @param[out] type Out-param for the interrupt type.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_get_type(const dif_entropy_src_t *entropy_src,
                                          dif_entropy_src_irq_t irq,
                                          dif_irq_type_t *type);
 
/**
 * Returns the state of all interrupts (i.e., pending or not) for this IP.
 *
 * @param entropy_src A entropy_src handle.
 * @param[out] snapshot Out-param for interrupt state snapshot.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_get_state(
    const dif_entropy_src_t *entropy_src,
    dif_entropy_src_irq_state_snapshot_t *snapshot);
 
/**
 * Returns whether a particular interrupt is currently pending.
 *
 * @param entropy_src A entropy_src handle.
 * @param irq An interrupt request.
 * @param[out] is_pending Out-param for whether the interrupt is pending.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_is_pending(
    const dif_entropy_src_t *entropy_src, dif_entropy_src_irq_t irq,
    bool *is_pending);
 
/**
 * Acknowledges all interrupts that were pending at the time of the state
 * snapshot.
 *
 * @param entropy_src A entropy_src handle.
 * @param snapshot Interrupt state snapshot.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_acknowledge_state(
    const dif_entropy_src_t *entropy_src,
    dif_entropy_src_irq_state_snapshot_t snapshot);
 
/**
 * Acknowledges all interrupts, indicating to the hardware that all
 * interrupts have been successfully serviced.
 *
 * @param entropy_src A entropy_src handle.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_acknowledge_all(
    const dif_entropy_src_t *entropy_src);
 
/**
 * Acknowledges a particular interrupt, indicating to the hardware that it has
 * been successfully serviced.
 *
 * @param entropy_src A entropy_src handle.
 * @param irq An interrupt request.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_acknowledge(
    const dif_entropy_src_t *entropy_src, dif_entropy_src_irq_t irq);
 
/**
 * Forces a particular interrupt, causing it to be serviced as if hardware had
 * asserted it.
 *
 * @param entropy_src A entropy_src handle.
 * @param irq An interrupt request.
 * @param val Value to be set.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_force(const dif_entropy_src_t *entropy_src,
                                       dif_entropy_src_irq_t irq,
                                       const bool val);
 
/**
 * A snapshot of the enablement state of the interrupts for this IP.
 *
 * This is an opaque type, to be used with the
 * `dif_entropy_src_irq_disable_all()` and `dif_entropy_src_irq_restore_all()`
 * functions.
 */
typedef uint32_t dif_entropy_src_irq_enable_snapshot_t;
 
/**
 * Checks whether a particular interrupt is currently enabled or disabled.
 *
 * @param entropy_src A entropy_src handle.
 * @param irq An interrupt request.
 * @param[out] state Out-param toggle state of the interrupt.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_get_enabled(
    const dif_entropy_src_t *entropy_src, dif_entropy_src_irq_t irq,
    dif_toggle_t *state);
 
/**
 * Sets whether a particular interrupt is currently enabled or disabled.
 *
 * @param entropy_src A entropy_src handle.
 * @param irq An interrupt request.
 * @param state The new toggle state for the interrupt.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_set_enabled(
    const dif_entropy_src_t *entropy_src, dif_entropy_src_irq_t irq,
    dif_toggle_t state);
 
/**
 * Disables all interrupts, optionally snapshotting all enable states for later
 * restoration.
 *
 * @param entropy_src A entropy_src handle.
 * @param[out] snapshot Out-param for the snapshot; may be `NULL`.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_disable_all(
    const dif_entropy_src_t *entropy_src,
    dif_entropy_src_irq_enable_snapshot_t *snapshot);
 
/**
 * Restores interrupts from the given (enable) snapshot.
 *
 * @param entropy_src A entropy_src handle.
 * @param snapshot A snapshot to restore from.
 * @return The result of the operation.
 */
OT_WARN_UNUSED_RESULT
dif_result_t dif_entropy_src_irq_restore_all(
    const dif_entropy_src_t *entropy_src,
    const dif_entropy_src_irq_enable_snapshot_t *snapshot);
 
#ifdef __cplusplus
}  // extern "C"
#endif  // __cplusplus
 
#endif  // OPENTITAN_SW_DEVICE_LIB_DIF_AUTOGEN_DIF_ENTROPY_SRC_AUTOGEN_H_