tests/acpi-utils.c

   1 /*
   2  * ACPI Utility Functions
   3  *
   4  * Copyright (c) 2013 Red Hat Inc.
   5  * Copyright (c) 2017 Skyport Systems
   6  *
   7  * Authors:
   8  *  Michael S. Tsirkin <mst@redhat.com>,
   9  *  Ben Warren <ben@skyportsystems.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12  * See the COPYING file in the top-level directory.
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include <glib/gstdio.h>
  17 #include "qemu-common.h"
  18 #include "qemu/bitmap.h"
  19 #include "acpi-utils.h"
  20 #include "boot-sector.h"
  21
  22 uint8_t acpi_calc_checksum(const uint8_t *data, int len)
  23 {
  24     int i;
  25     uint8_t sum = 0;
  26
  27     for (i = 0; i < len; i++) {
  28         sum += data[i];
  29     }
  30
  31     return sum;
  32 }
  33
  34 uint32_t acpi_find_rsdp_address(QTestState *qts)
  35 {
  36     uint32_t off;
  37
  38     /* RSDP location can vary across a narrow range */
  39     for (off = 0xf0000; off < 0x100000; off += 0x10) {
  40         uint8_t sig[] = "RSD PTR ";
  41         int i;
  42
  43         for (i = 0; i < sizeof sig - 1; ++i) {
  44             sig[i] = qtest_readb(qts, off + i);
  45         }
  46
  47         if (!memcmp(sig, "RSD PTR ", sizeof sig)) {
  48             break;
  49         }
  50     }
  51     return off;
  52 }
  53
  54 void acpi_parse_rsdp_table(QTestState *qts, uint32_t addr,
  55                            AcpiRsdpDescriptor *rsdp_table)
  56 {
  57     ACPI_READ_FIELD(qts, rsdp_table->signature, addr);
  58     ACPI_ASSERT_CMP64(rsdp_table->signature, "RSD PTR ");
  59
  60     ACPI_READ_FIELD(qts, rsdp_table->checksum, addr);
  61     ACPI_READ_ARRAY(qts, rsdp_table->oem_id, addr);
  62     ACPI_READ_FIELD(qts, rsdp_table->revision, addr);
  63     ACPI_READ_FIELD(qts, rsdp_table->rsdt_physical_address, addr);
  64     ACPI_READ_FIELD(qts, rsdp_table->length, addr);
  65 }