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 uint32_t acpi_get_rsdt_address(uint8_t *rsdp_table)
56 uint32_t rsdt_physical_address;
58 memcpy(&rsdt_physical_address, &rsdp_table[16 /* RsdtAddress offset */], 4);
59 return le32_to_cpu(rsdt_physical_address);
62 uint64_t acpi_get_xsdt_address(uint8_t *rsdp_table)
64 uint64_t xsdt_physical_address;
65 uint8_t revision = rsdp_table[15 /* Revision offset */];
67 /* We must have revision 2 if we're looking for an XSDT pointer */
68 g_assert(revision == 2);
70 memcpy(&xsdt_physical_address, &rsdp_table[24 /* XsdtAddress offset */], 8);
71 return le64_to_cpu(xsdt_physical_address);
74 void acpi_parse_rsdp_table(QTestState *qts, uint32_t addr, uint8_t *rsdp_table)
78 /* Read mandatory revision 0 table data (20 bytes) first */
79 qtest_memread(qts, addr, rsdp_table, 20);
80 revision = rsdp_table[15 /* Revision offset */];
83 case 0: /* ACPI 1.0 RSDP */
85 case 2: /* ACPI 2.0+ RSDP */
86 /* Read the rest of the RSDP table */
87 qtest_memread(qts, addr + 20, rsdp_table + 20, 16);
90 g_assert_not_reached();
93 ACPI_ASSERT_CMP64(*((uint64_t *)(rsdp_table)), "RSD PTR ");