diff options
Diffstat (limited to 'src/acpi/acpigen.c')
| -rw-r--r-- | src/acpi/acpigen.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/acpi/acpigen.c b/src/acpi/acpigen.c index 9818dc296c..8320b6cacc 100644 --- a/src/acpi/acpigen.c +++ b/src/acpi/acpigen.c @@ -1501,6 +1501,21 @@ void acpigen_write_if_lequal_namestr_int(const char *namestr, uint64_t val) acpigen_write_integer(val); } +/* + * Generates ACPI code to check at runtime if an object named `namestring` + * exists, and leaves the If scope open to continue execute code when this + * is true. NOTE: Requires matching acpigen_write_if_end(). + * + * If (CondRefOf (NAME)) + */ +void acpigen_write_if_cond_ref_of(const char *namestring) +{ + acpigen_write_if(); + acpigen_emit_ext_op(COND_REFOF_OP); + acpigen_emit_namestring(namestring); + acpigen_emit_byte(ZERO_OP); /* ignore COND_REFOF_OP destination */ +} + /* Closes previously opened if statement and generates ACPI code for else statement. */ void acpigen_write_else(void) { |