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soc/intel: Introduce ioapic_get_sci_pin()

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According to ACPI Release 6.5 systems supporting PIC (i8259)
interrupt mechanism need to report IRQ vector for the SCI_INT
field. In PIC mode only IRQ0..15 are allowed hardware vectors.

This change should cover section 5.2.9 to not pass SCI_INT
larger than IRQ15. Section 5.2.15.5 needs follow-up work.

Care should be taken that ioapic_get_sci_pin() is called
after platform code has potentially changed the routing
from the default.

It appears touched all platforms except siemens/mc_aplX
currently program SCI as IRQ9.

Change-Id: I723c207f1dcbba5e6fc0452fe1dbd087fad290ee
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74326
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <inforichland@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Kyösti Mälkki
2023-04-10 16:45:39 +03:00
parent ddc37d69cb
commit ae1b2d49cf
10 changed files with 103 additions and 92 deletions
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3
src/include/acpi/acpi.h
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@@ -1338,12 +1338,15 @@ int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,
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_sci_override(acpi_madt_irqoverride_t *irqoverride);
unsigned long acpi_create_madt_one_lapic(unsigned long current, u32 cpu, u32 apic);
unsigned long acpi_create_madt_lapics_with_nmis(unsigned long current);
unsigned long acpi_create_madt_lapic_nmis(unsigned long current);
u16 acpi_sci_int(void);
int acpi_create_srat_lapic(acpi_srat_lapic_t *lapic, u8 node, u8 apic);
int acpi_create_srat_x2apic(acpi_srat_x2apic_t *x2apic, u32 node, u32 apic);
int acpi_create_srat_mem(acpi_srat_mem_t *mem, u8 node, u32 basek, u32 sizek,