From 4f77f61d2dc8088a710611936680228d00eabed4 Mon Sep 17 00:00:00 2001 From: Sugnan Prabhu S Date: Wed, 10 Jun 2020 09:51:02 +0530 Subject: acpi: add STA function to return external variable This change adds support function to add STA function which returns an external variable. Change-Id: I31755a76ee985ee6059289ae194537d531270761 Signed-off-by: Sugnan Prabhu S Reviewed-on: https://review.coreboot.org/c/coreboot/+/42245 Reviewed-by: Rizwan Qureshi Reviewed-by: Tim Wawrzynczak Tested-by: build bot (Jenkins) --- src/acpi/acpigen.c | 11 +++++++++++ src/include/acpi/acpigen.h | 1 + 2 files changed, 12 insertions(+) (limited to 'src') diff --git a/src/acpi/acpigen.c b/src/acpi/acpigen.c index fc6da1beb9..bf1b373a60 100644 --- a/src/acpi/acpigen.c +++ b/src/acpi/acpigen.c @@ -742,6 +742,17 @@ void acpigen_write_STA(uint8_t status) acpigen_pop_len(); } +void acpigen_write_STA_ext(const char *namestring) +{ + /* + * Method (_STA, 0, NotSerialized) { Return (ext_val) } + */ + acpigen_write_method("_STA", 0); + acpigen_emit_byte(RETURN_OP); + acpigen_emit_namestring(namestring); + acpigen_pop_len(); +} + /* * Generates a func with max supported P-states. */ diff --git a/src/include/acpi/acpigen.h b/src/include/acpi/acpigen.h index dffde851f5..701e44ba97 100644 --- a/src/include/acpi/acpigen.h +++ b/src/include/acpi/acpigen.h @@ -319,6 +319,7 @@ void acpigen_write_empty_PCT(void); void acpigen_write_empty_PTC(void); void acpigen_write_PRW(u32 wake, u32 level); void acpigen_write_STA(uint8_t status); +void acpigen_write_STA_ext(const char *namestring); void acpigen_write_TPC(const char *gnvs_tpc_limit); void acpigen_write_PSS_package(u32 coreFreq, u32 power, u32 transLat, u32 busmLat, u32 control, u32 status); -- cgit v1.2.3