diff options
| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2019-12-17 13:54:41 +0100 |
|---|---|---|
| committer | Patrick Rudolph <siro@das-labor.org> | 2020-01-07 08:16:20 +0000 |
| commit | 389c8279432a4e213391ed21ef25707090fde7ef (patch) | |
| tree | ec9f415937824893007f22e650e7c94a70178f85 /src | |
| parent | 2dd3b5c0f8e62505b4c2559518e4ddbd1fbd6aae (diff) | |
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>
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/x86/acpigen.c | 15 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/acpigen.h | 1 | ||||
| -rw-r--r-- | src/drivers/ipmi/ipmi_kcs_ops.c | 2 |
3 files changed, 17 insertions, 1 deletions
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c index cc724a0cc1..493131eda1 100644 --- a/src/arch/x86/acpigen.c +++ b/src/arch/x86/acpigen.c @@ -199,6 +199,21 @@ void acpigen_write_name_string(const char *name, const char *string) 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; diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h index 11fe232272..c9a648505c 100644 --- a/src/arch/x86/include/arch/acpigen.h +++ b/src/arch/x86/include/arch/acpigen.h @@ -309,6 +309,7 @@ void acpigen_write_dword(unsigned int data); void acpigen_write_qword(uint64_t data); void acpigen_write_integer(uint64_t data); void acpigen_write_string(const char *string); +void acpigen_write_name_unicode(const char *name, const char *string); void acpigen_write_name(const char *name); void acpigen_write_name_zero(const char *name); void acpigen_write_name_one(const char *name); diff --git a/src/drivers/ipmi/ipmi_kcs_ops.c b/src/drivers/ipmi/ipmi_kcs_ops.c index 5cb8995df9..e0fa1b0120 100644 --- a/src/drivers/ipmi/ipmi_kcs_ops.c +++ b/src/drivers/ipmi/ipmi_kcs_ops.c @@ -253,7 +253,7 @@ static void ipmi_ssdt(struct device *dev) acpigen_write_scope(scope); acpigen_write_device("SPMI"); acpigen_write_name_string("_HID", "IPI0001"); - acpigen_write_name_string("_STR", "IPMI_KCS"); + acpigen_write_name_unicode("_STR", "IPMI_KCS"); acpigen_write_name_byte("_UID", dev->command); acpigen_write_STA(0xf); acpigen_write_name("_CRS"); |