acpigen: Add function to generate unicode names
The ACPI spec 6.3 chapter 6.1.10 states that _STR has to return a buffer
containing UTF-16 characters.
Add function to generate Unicode names and use it for _STR. It will
replace non-ASCII characters with '?'.
Use the introduced function in IPMI driver.
Fixes ACPI warning shown in fwts.
Change-Id: I16992bd449e3a51f6a8875731cd45a9f43de5c8c
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37789
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c
index cc724a0..493131e 100644
--- a/src/arch/x86/acpigen.c
+++ b/src/arch/x86/acpigen.c
@@ -199,6 +199,21 @@
acpigen_write_string(string);
}
+void acpigen_write_name_unicode(const char *name, const char *string)
+{
+ const size_t len = strlen(string) + 1;
+ acpigen_write_name(name);
+ acpigen_emit_byte(BUFFER_OP);
+ acpigen_write_len_f();
+ acpigen_write_integer(len);
+ for (size_t i = 0; i < len; i++) {
+ const char c = string[i];
+ /* Simple ASCII to UTF-16 conversion, replace non ASCII characters */
+ acpigen_emit_word(c >= 0 ? c : '?');
+ }
+ acpigen_pop_len();
+}
+
void acpigen_emit_stream(const char *data, int size)
{
int i;