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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 <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42245
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Sugnan Prabhu S 2020-06-10 09:51:02 +05:30 committed by Patrick Georgi
parent 879b3c195f
commit 4f77f61d2d
2 changed files with 12 additions and 0 deletions
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11
src/acpi/acpigen.c
View File

@ -742,6 +742,17 @@ void acpigen_write_STA(uint8_t status)
acpigen_pop_len(); 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. * Generates a func with max supported P-states.
*/ */

1
src/include/acpi/acpigen.h
View File

@ -319,6 +319,7 @@ void acpigen_write_empty_PCT(void);
void acpigen_write_empty_PTC(void); void acpigen_write_empty_PTC(void);
void acpigen_write_PRW(u32 wake, u32 level); void acpigen_write_PRW(u32 wake, u32 level);
void acpigen_write_STA(uint8_t status); 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_TPC(const char *gnvs_tpc_limit);
void acpigen_write_PSS_package(u32 coreFreq, u32 power, u32 transLat, void acpigen_write_PSS_package(u32 coreFreq, u32 power, u32 transLat,
u32 busmLat, u32 control, u32 status); u32 busmLat, u32 control, u32 status);