summaryrefslogtreecommitdiff
path: root/tests/acpi/acpigen-test.c
blob: 0d261e22d97ed43350955f7865aad32b89054a98 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
/* SPDX-License-Identifier: GPL-2.0-only */

#include <stdlib.h>
#include <types.h>
#include <tests/test.h>
#include <acpi/acpigen.h>

#define ACPIGEN_TEST_BUFFER_SZ (16 * KiB)

/* Returns AML package length. Works with normal and extended packages.
   This implementation is independent from acpigen.c implementation of package length. */
static u32 decode_package_length(const char *ptr)
{
	const u8 *aml = (u8 *)ptr;
	const u32 offset = (aml[0] == EXT_OP_PREFIX ? 2 : 1);
	u32 byte_zero_mask = 0x3F; /* Bits [0:5] */
	u32 byte_count = aml[offset] >> 6;
	u32 package_length = 0;

	while (byte_count) {
		package_length |= aml[offset + byte_count] << ((byte_count << 3) - 4);
		byte_zero_mask = 0x0F; /* Use bits [0:3] of byte 0 */
		byte_count--;
	}

	package_length |= (aml[offset] & byte_zero_mask);

	return package_length;
}

static u32 get_current_block_length(const char *base)
{
	const u32 offset = (base[0] == EXT_OP_PREFIX ? 2 : 1);

	return ((uintptr_t)acpigen_get_current() - ((uintptr_t)base + offset));
}

static int setup_acpigen(void **state)
{
	void *buffer = malloc(ACPIGEN_TEST_BUFFER_SZ);

	if (buffer == NULL)
		return -1;

	memset(buffer, 0, ACPIGEN_TEST_BUFFER_SZ);

	*state = buffer;
	return 0;
}

static int teardown_acpigen(void **state)
{
	free(*state);
	return 0;
}

static void test_acpigen_single_if(void **state)
{
	char *acpigen_buf = *state;
	u32 if_package_length = 0;
	u32 block_length = 0;

	acpigen_set_current(acpigen_buf);

	/* Create dummy AML */
	acpigen_write_if_lequal_op_int(LOCAL0_OP, 64);

	for (int i = 0; i < 20; ++i)
		acpigen_write_store_ops(ZERO_OP, LOCAL1_OP);

	/* Close if */
	acpigen_pop_len();

	if_package_length = decode_package_length(acpigen_buf);
	block_length = get_current_block_length(acpigen_buf);
	assert_int_equal(if_package_length, block_length);
}

static void create_nested_ifs_recursive(size_t stack_len[], u32 i, u32 n)
{
	if (i >= n)
		return;

	char *const start = acpigen_get_current();
	acpigen_write_if_and(LOCAL0_OP, ZERO_OP);

	for (int k = 0; k < 3; ++k)
		acpigen_write_store_ops(ZERO_OP, LOCAL1_OP);

	create_nested_ifs_recursive(stack_len, i + 1, n);

	acpigen_pop_len();
	stack_len[i] = acpigen_get_current() - start;
}

static void test_acpigen_nested_ifs(void **state)
{
	char *acpigen_buf = *state;
	const size_t nesting_level = 8;
	size_t block_len[8] = {0};

	acpigen_set_current(acpigen_buf);

	create_nested_ifs_recursive(block_len, 0, nesting_level);

	for (int i = 0, j = 0; i < nesting_level; ++i, ++j) {
		/* Find next if op */
		for (; j < ACPIGEN_TEST_BUFFER_SZ; ++j) {
			if ((u8)acpigen_buf[j] == IF_OP)
				break;
		}
		assert_int_equal(decode_package_length(acpigen_buf + j), block_len[i] - 1);
	}
}

static void test_acpigen_write_package(void **state)
{
	char *acpigen_buf = *state;
	u32 package_length;
	u32 block_length;

	acpigen_set_current(acpigen_buf);
	acpigen_write_package(3);

	acpigen_write_return_singleton_buffer(0xA);
	acpigen_write_return_singleton_buffer(0x7);
	acpigen_write_return_singleton_buffer(0xF);

	acpigen_pop_len();

	package_length = decode_package_length(acpigen_buf);
	block_length = get_current_block_length(acpigen_buf);
	assert_int_equal(package_length, block_length);
}

static void test_acpigen_scope_with_contents(void **state)
{
	char *acpigen_buf = *state;
	char *block_start[8] = {0};
	u32 block_counter = 0;
	u32 package_length;
	u32 block_length;

	acpigen_set_current(acpigen_buf);

	/* Scope("\_SB") { */
	block_start[block_counter++] = acpigen_get_current();
	acpigen_write_scope("\\_SB");

	/* Device("PCI0") { */
	block_start[block_counter++] = acpigen_get_current();
	acpigen_write_device("PCI0");

	/* Name(INT1, 0x1234) */
	acpigen_write_name_integer("INT1", 0x1234);

	/* Name (_HID, EisaId ("PNP0A08")) // PCI Express Bus */
	acpigen_write_name("_HID");
	acpigen_emit_eisaid("PNP0A08");

	/* Method(^BN00, 0, NotSerialized) { */
	block_start[block_counter++] = acpigen_get_current();
	acpigen_write_method("^BN00", 0);

	/* Return( 0x12 + ^PCI0.INT1 ) */
	acpigen_write_return_op(AND_OP);
	acpigen_write_byte(0x12);
	acpigen_emit_namestring("^PCI0.INT1");

	/* } */
	acpigen_pop_len();
	block_counter--;
	package_length = decode_package_length(block_start[block_counter]);
	block_length = get_current_block_length(block_start[block_counter]);
	assert_int_equal(package_length, block_length);

	/* Method (_BBN, 0, NotSerialized) { */
	block_start[block_counter++] = acpigen_get_current();
	acpigen_write_method("_BBN", 0);

	/* Return (BN00 ()) */
	acpigen_write_return_namestr("BN00");
	acpigen_emit_byte(0x0A);

	/* } */
	acpigen_pop_len();
	block_counter--;
	package_length = decode_package_length(block_start[block_counter]);
	block_length = get_current_block_length(block_start[block_counter]);
	assert_int_equal(package_length, block_length);

	/* } */
	acpigen_pop_len();
	block_counter--;
	package_length = decode_package_length(block_start[block_counter]);
	block_length = get_current_block_length(block_start[block_counter]);
	assert_int_equal(package_length, block_length);

	/* } */
	acpigen_pop_len();
	block_counter--;
	package_length = decode_package_length(block_start[block_counter]);
	block_length = get_current_block_length(block_start[block_counter]);
	assert_int_equal(package_length, block_length);
}

int main(void)
{
	const struct CMUnitTest tests[] = {
		cmocka_unit_test_setup_teardown(test_acpigen_single_if, setup_acpigen,
						teardown_acpigen),
		cmocka_unit_test_setup_teardown(test_acpigen_nested_ifs, setup_acpigen,
						teardown_acpigen),
		cmocka_unit_test_setup_teardown(test_acpigen_write_package, setup_acpigen,
						teardown_acpigen),
		cmocka_unit_test_setup_teardown(test_acpigen_scope_with_contents, setup_acpigen,
						teardown_acpigen),
	};

	return cb_run_group_tests(tests, NULL, NULL);
}