quorum: Inline quorum_aio_cb()
[qemu.git] / tests / boot-sector.c
1 /*
2 * QEMU boot sector testing helpers.
3 *
4 * Copyright (c) 2016 Red Hat Inc.
5 *
6 * Authors:
7 * Michael S. Tsirkin <mst@redhat.com>
8 * Victor Kaplansky <victork@redhat.com>
9 *
10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
11 * See the COPYING file in the top-level directory.
12 */
13 #include "qemu/osdep.h"
14 #include "boot-sector.h"
15 #include "qemu-common.h"
16 #include "libqtest.h"
17
18 #define LOW(x) ((x) & 0xff)
19 #define HIGH(x) ((x) >> 8)
20
21 #define SIGNATURE 0xdead
22 #define SIGNATURE_OFFSET 0x10
23 #define BOOT_SECTOR_ADDRESS 0x7c00
24
25 /* Boot sector code: write SIGNATURE into memory,
26 * then halt.
27 * Q35 machine requires a minimum 0x7e000 bytes disk.
28 * (bug or feature?)
29 */
30 static uint8_t boot_sector[0x7e000] = {
31 /* The first sector will be placed at RAM address 00007C00, and
32 * the BIOS transfers control to 00007C00
33 */
34
35 /* Data Segment register should be initialized, since pxe
36 * boot loader can leave it dirty.
37 */
38
39 /* 7c00: move $0000,%ax */
40 [0x00] = 0xb8,
41 [0x01] = 0x00,
42 [0x02] = 0x00,
43 /* 7c03: move %ax,%ds */
44 [0x03] = 0x8e,
45 [0x04] = 0xd8,
46
47 /* 7c05: mov $0xdead,%ax */
48 [0x05] = 0xb8,
49 [0x06] = LOW(SIGNATURE),
50 [0x07] = HIGH(SIGNATURE),
51 /* 7c08: mov %ax,0x7c10 */
52 [0x08] = 0xa3,
53 [0x09] = LOW(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET),
54 [0x0a] = HIGH(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET),
55
56 /* 7c0b cli */
57 [0x0b] = 0xfa,
58 /* 7c0c: hlt */
59 [0x0c] = 0xf4,
60 /* 7c0e: jmp 0x7c07=0x7c0f-3 */
61 [0x0d] = 0xeb,
62 [0x0e] = LOW(-3),
63 /* We mov 0xdead here: set value to make debugging easier */
64 [SIGNATURE_OFFSET] = LOW(0xface),
65 [SIGNATURE_OFFSET + 1] = HIGH(0xface),
66 /* End of boot sector marker */
67 [0x1FE] = 0x55,
68 [0x1FF] = 0xAA,
69 };
70
71 /* Create boot disk file. */
72 int boot_sector_init(char *fname)
73 {
74 int fd, ret;
75 size_t len = sizeof boot_sector;
76
77 fd = mkstemp(fname);
78 if (fd < 0) {
79 fprintf(stderr, "Couldn't open \"%s\": %s", fname, strerror(errno));
80 return 1;
81 }
82
83 /* For Open Firmware based system, we can use a Forth script instead */
84 if (strcmp(qtest_get_arch(), "ppc64") == 0) {
85 len = sprintf((char *)boot_sector, "\\ Bootscript\n%x %x c! %x %x c!\n",
86 LOW(SIGNATURE), BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET,
87 HIGH(SIGNATURE), BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET + 1);
88 }
89
90 ret = write(fd, boot_sector, len);
91 close(fd);
92
93 if (ret != len) {
94 fprintf(stderr, "Could not write \"%s\"", fname);
95 return 1;
96 }
97
98 return 0;
99 }
100
101 /* Loop until signature in memory is OK. */
102 void boot_sector_test(void)
103 {
104 uint8_t signature_low;
105 uint8_t signature_high;
106 uint16_t signature;
107 int i;
108
109 /* Wait at most 90 seconds */
110 #define TEST_DELAY (1 * G_USEC_PER_SEC / 10)
111 #define TEST_CYCLES MAX((90 * G_USEC_PER_SEC / TEST_DELAY), 1)
112
113 /* Poll until code has run and modified memory. Once it has we know BIOS
114 * initialization is done. TODO: check that IP reached the halt
115 * instruction.
116 */
117 for (i = 0; i < TEST_CYCLES; ++i) {
118 signature_low = readb(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET);
119 signature_high = readb(BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET + 1);
120 signature = (signature_high << 8) | signature_low;
121 if (signature == SIGNATURE) {
122 break;
123 }
124 g_usleep(TEST_DELAY);
125 }
126
127 g_assert_cmphex(signature, ==, SIGNATURE);
128 }
129
130 /* unlink boot disk file. */
131 void boot_sector_cleanup(const char *fname)
132 {
133 unlink(fname);
134 }