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| author | Felix Held <felix-coreboot@felixheld.de> | 2023-05-04 23:00:06 +0200 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-05-08 16:00:54 +0000 |
| commit | 2d4112f76b004aa49ab8185cff4bd2313e01dff8 (patch) | |
| tree | aad6e068bade3c8f368a8d13348fdfa885b125d5 /src/acpi | |
| parent | 98bb790286e980a6feab1451e8cc4b5be7fdf059 (diff) | |
acpi/acpigen: add acpigen_write_BBN to generate base bus number method
Introduce acpigen_write_BBN to generate the ACPI method object that
returns the base bus number for a PCI(e) host bridge. When called, the
base_bus_number argument must be the first PCI bus number that got
assigned to the corresponding host bridge.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ib67bf42b9c77c262d8a02d8f28ac5cb8482136b9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74991
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <inforichland@gmail.com>
Diffstat (limited to 'src/acpi')
| -rw-r--r-- | src/acpi/acpigen.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/acpi/acpigen.c b/src/acpi/acpigen.c index 94a6f908a9..6f6e85a571 100644 --- a/src/acpi/acpigen.c +++ b/src/acpi/acpigen.c @@ -821,6 +821,17 @@ void acpigen_write_STA_ext(const char *namestring) acpigen_pop_len(); } +void acpigen_write_BBN(uint8_t base_bus_number) +{ + /* + * Method (_BBN, 0, NotSerialized) { Return (status) } + */ + acpigen_write_method("_BBN", 0); + acpigen_emit_byte(RETURN_OP); + acpigen_write_byte(base_bus_number); + acpigen_pop_len(); +} + void acpigen_write_LPI_package(u64 level, const struct acpi_lpi_state *states, u16 nentries) { /* |