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/* 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);
}
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