From 75c4d4479808c3d959661b47823a0932dfd2eb40 Mon Sep 17 00:00:00 2001 From: Felix Held Date: Thu, 11 Jan 2024 23:57:38 +0100 Subject: acpi/acpigen: add acpigen_write_SEG for segment group number method Introduce acpigen_write_SEG to generate the ACPI method object that returns the PCI segment group number for a PCI(e) host bridge. Signed-off-by: Felix Held Change-Id: I94837fdbe140ee1ff904ffd20bdab3e86f850774 Reviewed-on: https://review.coreboot.org/c/coreboot/+/79923 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Rudolph --- 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 64ec7343e1..257bd52c3e 100644 --- a/src/acpi/acpigen.c +++ b/src/acpi/acpigen.c @@ -868,6 +868,17 @@ void acpigen_write_BBN(uint8_t base_bus_number) acpigen_pop_len(); } +void acpigen_write_SEG(uint8_t segment_group_number) +{ + /* + * Method (_SEG, 0, NotSerialized) { Return (status) } + */ + acpigen_write_method("_SEG", 0); + acpigen_emit_byte(RETURN_OP); + acpigen_write_byte(segment_group_number); + acpigen_pop_len(); +} + void acpigen_write_LPI_package(u64 level, const struct acpi_lpi_state *states, u16 nentries) { /* diff --git a/src/include/acpi/acpigen.h b/src/include/acpi/acpigen.h index 7a5be515cc..d2e669fe3e 100644 --- a/src/include/acpi/acpigen.h +++ b/src/include/acpi/acpigen.h @@ -436,6 +436,7 @@ 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_BBN(uint8_t base_bus_number); +void acpigen_write_SEG(uint8_t segment_group_number); 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