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acpigen: Add functions to generate _STA() and _PRW()

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Add helper functions for generating some common objects:

acpigen_write_STA(status) will generate a status method that will
indicate the device status as provided:
  Method (_STA) { Return (status) }

Full status byte configuration is possible and macros are provided for
the common status bytes used for generated code:
ACPI_STATUS_DEVICE_ALL_OFF = 0x0
ACPI_STATUS_DEVICE_ALL_ON  = 0xF

acpigen_write_PRW() will generate a Power Resoruce for Wake that describes
the GPE that will wake a particular device:
  Name (_PRW, Package (2) { wake, level }

Change-Id: I10277f0f3820d272d3975abf34b9a8de577782e5
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/14795
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Duncan Laurie
2016-05-09 11:08:46 -07:00
committed by Duncan Laurie
parent f7c3876c28
commit abe2de8854
2 changed files with 37 additions and 0 deletions
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23
src/arch/x86/acpigen.c
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@@ -449,6 +449,17 @@ void acpigen_write_device(const char *name)
acpigen_emit_namestring(name);
}
void acpigen_write_STA(uint8_t status)
{
/*
* Method (_STA, 0, NotSerialized) { Return (status) }
*/
acpigen_write_method("_STA", 0);
acpigen_emit_byte(0xa4);
acpigen_write_byte(status);
acpigen_pop_len();
}
/*
* Generates a func with max supported P-states.
*/
@@ -503,6 +514,18 @@ void acpigen_write_TPC(const char *gnvs_tpc_limit)
acpigen_pop_len();
}
void acpigen_write_PRW(u32 wake, u32 level)
{
/*
* Name (_PRW, Package () { wake, level }
*/
acpigen_write_name("_PRW");
acpigen_write_package(2);
acpigen_write_integer(wake);
acpigen_write_integer(level);
acpigen_pop_len();
}
void acpigen_write_PSS_package(u32 coreFreq, u32 power, u32 transLat,
u32 busmLat, u32 control, u32 status)
{