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| author | Duncan Laurie <dlaurie@google.com> | 2018-05-07 14:26:59 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-05-11 09:00:20 +0000 |
| commit | beb2af4e3512e2f1c8445417ab2fcc90ef481124 (patch) | |
| tree | 482c255d8591da7b982c2bbf5b2af400d8742a59 /src/arch/x86/acpigen.c | |
| parent | bae9f85ddbd2e62af1b47169cbfeb10b06d45e04 (diff) | |
| download | coreboot-beb2af4e3512e2f1c8445417ab2fcc90ef481124.tar.xz | |
acpi: Add support for generating ACPI _UPC
This commit adds support for writing ACPI _UPC structures that
help describe USB ports for the OS.
This is a simple structure format which indicates what type of
port it is and whether it is connectable. It should be paired
with an ACPI _PLD structure to define USB ports for the OS.
Change-Id: Ide3768f60f96e9ad7f919ad3fb11d91045dc174a
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/26170
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/arch/x86/acpigen.c')
| -rw-r--r-- | src/arch/x86/acpigen.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c index 10a4e1ee8f..867c809a45 100644 --- a/src/arch/x86/acpigen.c +++ b/src/arch/x86/acpigen.c @@ -1221,6 +1221,21 @@ void acpigen_write_return_string(const char *arg) acpigen_write_string(arg); } +void acpigen_write_upc(enum acpi_upc_type type) +{ + acpigen_write_name("_UPC"); + acpigen_write_package(4); + /* Connectable */ + acpigen_write_byte(type == UPC_TYPE_UNUSED ? 0 : 0xff); + /* Type */ + acpigen_write_byte(type); + /* Reserved0 */ + acpigen_write_zero(); + /* Reserved1 */ + acpigen_write_zero(); + acpigen_pop_len(); +} + void acpigen_write_dsm(const char *uuid, void (**callbacks)(void *), size_t count, void *arg) { |