sw/device/lib/dif/dif_tlul_mailbox.c

/*
 * Copyright 2023 Google LLC
 * Copyright lowRISC contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#include "sw/device/lib/dif/dif_tlul_mailbox.h"

#include <stddef.h>

#include "sw/device/lib/base/bitfield.h"
#include "sw/device/lib/base/macros.h"
#include "sw/device/lib/dif/dif_base.h"

#include "tlul_mailbox_regs.h"  // Generated.


dif_result_t dif_tlul_mailbox_send_message(const dif_tlul_mailbox_t *tlul_mailbox, uint32_t *buf) {

  if (tlul_mailbox == NULL) {
    return kDifBadArg;
  }

  mmio_region_write32(tlul_mailbox->base_addr, TLUL_MAILBOX_MBOXW_REG_OFFSET, *buf);
  return kDifOk;
}

dif_result_t dif_tlul_mailbox_read_message(const dif_tlul_mailbox_t *tlul_mailbox, uint32_t *buf) {

  if (tlul_mailbox == NULL) {
    return kDifBadArg;
  }

  *buf = mmio_region_read32(tlul_mailbox->base_addr, TLUL_MAILBOX_MBOXR_REG_OFFSET);
  return kDifOk;
}