2 * ACPI Utility Functions
4 * Copyright (c) 2013 Red Hat Inc.
5 * Copyright (c) 2017 Skyport Systems
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.
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"
22 uint8_t acpi_calc_checksum(const uint8_t *data, int len)
27 for (i = 0; i < len; i++) {
34 uint32_t acpi_find_rsdp_address(QTestState *qts)
38 /* RSDP location can vary across a narrow range */
39 for (off = 0xf0000; off < 0x100000; off += 0x10) {
40 uint8_t sig[] = "RSD PTR ";
43 for (i = 0; i < sizeof sig - 1; ++i) {
44 sig[i] = qtest_readb(qts, off + i);
47 if (!memcmp(sig, "RSD PTR ", sizeof sig)) {
54 uint64_t acpi_get_xsdt_address(uint8_t *rsdp_table)
56 uint64_t xsdt_physical_address;
57 uint8_t revision = rsdp_table[15 /* Revision offset */];
59 /* We must have revision 2 if we're looking for an XSDT pointer */
60 g_assert(revision == 2);
62 memcpy(&xsdt_physical_address, &rsdp_table[24 /* XsdtAddress offset */], 8);
63 return le64_to_cpu(xsdt_physical_address);
66 void acpi_parse_rsdp_table(QTestState *qts, uint32_t addr, uint8_t *rsdp_table)
70 /* Read mandatory revision 0 table data (20 bytes) first */
71 qtest_memread(qts, addr, rsdp_table, 20);
72 revision = rsdp_table[15 /* Revision offset */];
75 case 0: /* ACPI 1.0 RSDP */
77 case 2: /* ACPI 2.0+ RSDP */
78 /* Read the rest of the RSDP table */
79 qtest_memread(qts, addr + 20, rsdp_table + 20, 16);
82 g_assert_not_reached();
85 ACPI_ASSERT_CMP64(*((uint64_t *)(rsdp_table)), "RSD PTR ");
89 * load ACPI table at @addr_ptr offset pointer into buffer and return it in
90 * @aml, its length in @aml_len and check that signature/checksum matches
93 void acpi_fetch_table(QTestState *qts, uint8_t **aml, uint32_t *aml_len,
94 const uint8_t *addr_ptr, const char *sig,
99 memcpy(&addr, addr_ptr , sizeof(addr));
100 addr = le32_to_cpu(addr);
101 qtest_memread(qts, addr + 4, &len, 4); /* Length of ACPI table */
102 *aml_len = le32_to_cpu(len);
103 *aml = g_malloc0(*aml_len);
104 /* get whole table */
105 qtest_memread(qts, addr, *aml, *aml_len);
108 ACPI_ASSERT_CMP(**aml, sig);
110 if (verify_checksum) {
111 g_assert(!acpi_calc_checksum(*aml, *aml_len));