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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>
This commit is contained in:
Kyösti Mälkki 2021-06-08 11:37:08 +03:00
parent 014901bd9b
commit c7da027e75
2 changed files with 21 additions and 0 deletions
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20
src/acpi/acpi.c
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@ -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)
{

1
src/include/acpi/acpi.h
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@ -1263,6 +1263,7 @@ void acpi_add_table(acpi_rsdp_t *rsdp, void *table);
int acpi_create_madt_lapic(acpi_madt_lapic_t *lapic, u8 cpu, u8 apic);
int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,
u32 gsi_base);
int acpi_create_madt_ioapic_from_hw(acpi_madt_ioapic_t *ioapic, u32 addr);
int acpi_create_madt_irqoverride(acpi_madt_irqoverride_t *irqoverride,
u8 bus, u8 source, u32 gsirq, u16 flags);
int acpi_create_madt_lapic_nmi(acpi_madt_lapic_nmi_t *lapic_nmi, u8 cpu,