diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2021-06-08 11:37:08 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2022-11-10 19:08:22 +0000 |
| commit | c7da027e75a9623157b6375d86162ab862846628 (patch) | |
| tree | de79743713e9404075671a65ce27edb14df0c741 /src/acpi/acpi.c | |
| parent | 014901bd9bd3df7ee919de228969f0359db0de4f (diff) | |
ACPI: Add acpi_create_madt_ioapic_from_hw()
Read I/O APIC ID and vector counts from hardware.
Change-Id: Ia173582eaad305000f958c5d207e9efaa06d8750
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55310
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/acpi/acpi.c')
| -rw-r--r-- | src/acpi/acpi.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c index e211558f62..3ddb1d02ed 100644 --- a/src/acpi/acpi.c +++ b/src/acpi/acpi.c @@ -30,6 +30,10 @@ #include <types.h> #include <version.h> +#if ENV_X86 +#include <arch/ioapic.h> +#endif + static acpi_rsdp_t *valid_rsdp(acpi_rsdp_t *rsdp); u8 acpi_checksum(u8 *table, u32 length) @@ -180,6 +184,22 @@ int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr, return ioapic->length; } +#if ENV_X86 +/* For a system with multiple I/O APICs it's required that the one potentially + routing i8259 via ExtNMI delivery calls this first to get GSI #0. */ +int acpi_create_madt_ioapic_from_hw(acpi_madt_ioapic_t *ioapic, u32 addr) +{ + static u32 gsi_base; + u32 my_base; + u8 id = get_ioapic_id((void *)(uintptr_t)addr); + u8 count = ioapic_get_max_vectors((void *)(uintptr_t)addr); + + my_base = gsi_base; + gsi_base += count; + return acpi_create_madt_ioapic(ioapic, id, addr, my_base); +} +#endif + int acpi_create_madt_irqoverride(acpi_madt_irqoverride_t *irqoverride, u8 bus, u8 source, u32 gsirq, u16 flags) { |