src/devices/board/drivers/x86/util.cc

// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "util.h"

#include <acpica/acpi.h>

ACPI_STATUS acpi_evaluate_integer(ACPI_HANDLE handle, const char* name, uint64_t* out) {
  ACPI_OBJECT obj = {
      .Type = ACPI_TYPE_INTEGER,
  };
  ACPI_BUFFER buffer = {
      .Length = sizeof(obj),
      .Pointer = &obj,
  };
  ACPI_STATUS acpi_status = AcpiEvaluateObject(handle, (char*)name, NULL, &buffer);
  if (acpi_status != AE_OK) {
    return acpi_status;
  }
  *out = obj.Integer.Value;
  return AE_OK;
}

ACPI_STATUS acpi_evaluate_method_intarg(ACPI_HANDLE handle, const char* name, uint64_t arg) {
  ACPI_OBJECT obj = {};
  obj.Integer.Type = ACPI_TYPE_INTEGER;
  obj.Integer.Value = arg;
  ACPI_OBJECT_LIST params = {
      .Count = 1,
      .Pointer = &obj,
  };
  return AcpiEvaluateObject(handle, (char*)name, &params, NULL);
}