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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi.h>
#include <arch/ioapic.h>
#include <arch/smp/mpspec.h>
#include <commonlib/sort.h>
#include <cpu/cpu.h>
#include <device/device.h>
static int acpi_create_madt_lapic(acpi_madt_lapic_t *lapic, u8 cpu, u8 apic)
{
lapic->type = LOCAL_APIC; /* Local APIC structure */
lapic->length = sizeof(acpi_madt_lapic_t);
lapic->flags = (1 << 0); /* Processor/LAPIC enabled */
lapic->processor_id = cpu;
lapic->apic_id = apic;
return lapic->length;
}
static int acpi_create_madt_lx2apic(acpi_madt_lx2apic_t *lapic, u32 cpu, u32 apic)
{
lapic->type = LOCAL_X2APIC; /* Local APIC structure */
lapic->reserved = 0;
lapic->length = sizeof(acpi_madt_lx2apic_t);
lapic->flags = (1 << 0); /* Processor/LAPIC enabled */
lapic->processor_id = cpu;
lapic->x2apic_id = apic;
return lapic->length;
}
unsigned long acpi_create_madt_one_lapic(unsigned long current, u32 index, u32 lapic_id)
{
if (lapic_id <= ACPI_MADT_MAX_LAPIC_ID)
current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, index,
lapic_id);
else
current += acpi_create_madt_lx2apic((acpi_madt_lx2apic_t *)current, index,
lapic_id);
return current;
}
/* Increase if necessary. Currently all x86 CPUs only have 2 SMP threads */
#define MAX_THREAD_ID 1
/*
* From ACPI 6.4 spec:
* "The advent of multi-threaded processors yielded multiple logical processors
* executing on common processor hardware. ACPI defines logical processors in
* an identical manner as physical processors. To ensure that non
* multi-threading aware OSPM implementations realize optimal performance on
* platforms containing multi-threaded processors, two guidelines should be
* followed. The first is the same as above, that is, OSPM should initialize
* processors in the order that they appear in the MADT. The second is that
* platform firmware should list the first logical processor of each of the
* individual multi-threaded processors in the MADT before listing any of the
* second logical processors. This approach should be used for all successive
* logical processors."
*/
static unsigned long acpi_create_madt_lapics(unsigned long current)
{
struct device *cpu;
int index, apic_ids[CONFIG_MAX_CPUS] = {0}, num_cpus = 0, sort_start = 0;
for (unsigned int thread_id = 0; thread_id <= MAX_THREAD_ID; thread_id++) {
for (cpu = all_devices; cpu; cpu = cpu->next) {
if (!is_enabled_cpu(cpu))
continue;
if (num_cpus >= ARRAY_SIZE(apic_ids))
break;
if (cpu->path.apic.thread_id != thread_id)
continue;
apic_ids[num_cpus++] = cpu->path.apic.apic_id;
}
bubblesort(&apic_ids[sort_start], num_cpus - sort_start, NUM_ASCENDING);
sort_start = num_cpus;
}
for (index = 0; index < num_cpus; index++)
current = acpi_create_madt_one_lapic(current, index, apic_ids[index]);
return current;
}
static int acpi_create_madt_ioapic(acpi_madt_ioapic_t *ioapic, u8 id, u32 addr,
u32 gsi_base)
{
ioapic->type = IO_APIC; /* I/O APIC structure */
ioapic->length = sizeof(acpi_madt_ioapic_t);
ioapic->reserved = 0x00;
ioapic->gsi_base = gsi_base;
ioapic->ioapic_id = id;
ioapic->ioapic_addr = addr;
return ioapic->length;
}
/* 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);
}
static int acpi_create_madt_irqoverride(acpi_madt_irqoverride_t *irqoverride,
u8 bus, u8 source, u32 gsirq, u16 flags)
{
irqoverride->type = IRQ_SOURCE_OVERRIDE; /* Interrupt source override */
irqoverride->length = sizeof(acpi_madt_irqoverride_t);
irqoverride->bus = bus;
irqoverride->source = source;
irqoverride->gsirq = gsirq;
irqoverride->flags = flags;
return irqoverride->length;
}
static int acpi_create_madt_sci_override(acpi_madt_irqoverride_t *irqoverride)
{
u8 gsi, irq, flags;
ioapic_get_sci_pin(&gsi, &irq, &flags);
if (!CONFIG(ACPI_HAVE_PCAT_8259))
irq = gsi;
irqoverride->type = IRQ_SOURCE_OVERRIDE; /* Interrupt source override */
irqoverride->length = sizeof(acpi_madt_irqoverride_t);
irqoverride->bus = MP_BUS_ISA;
irqoverride->source = irq;
irqoverride->gsirq = gsi;
irqoverride->flags = flags;
return irqoverride->length;
}
static unsigned long acpi_create_madt_ioapic_gsi0_default(unsigned long current)
{
current += acpi_create_madt_ioapic_from_hw((acpi_madt_ioapic_t *)current, IO_APIC_ADDR);
current += acpi_create_madt_irqoverride((void *)current, MP_BUS_ISA, 0, 2,
MP_IRQ_TRIGGER_EDGE | MP_IRQ_POLARITY_HIGH);
current += acpi_create_madt_sci_override((void *)current);
return current;
}
static int acpi_create_madt_lapic_nmi(acpi_madt_lapic_nmi_t *lapic_nmi, u8 cpu,
u16 flags, u8 lint)
{
lapic_nmi->type = LOCAL_APIC_NMI; /* Local APIC NMI structure */
lapic_nmi->length = sizeof(acpi_madt_lapic_nmi_t);
lapic_nmi->flags = flags;
lapic_nmi->processor_id = cpu;
lapic_nmi->lint = lint;
return lapic_nmi->length;
}
static int acpi_create_madt_lx2apic_nmi(acpi_madt_lx2apic_nmi_t *lapic_nmi, u32 cpu,
u16 flags, u8 lint)
{
lapic_nmi->type = LOCAL_X2APIC_NMI; /* Local APIC NMI structure */
lapic_nmi->length = sizeof(acpi_madt_lx2apic_nmi_t);
lapic_nmi->flags = flags;
lapic_nmi->processor_id = cpu;
lapic_nmi->lint = lint;
lapic_nmi->reserved[0] = 0;
lapic_nmi->reserved[1] = 0;
lapic_nmi->reserved[2] = 0;
return lapic_nmi->length;
}
unsigned long acpi_create_madt_lapic_nmis(unsigned long current)
{
const u16 flags = MP_IRQ_TRIGGER_EDGE | MP_IRQ_POLARITY_HIGH;
/* 1: LINT1 connect to NMI */
/* create all subtables for processors */
current += acpi_create_madt_lapic_nmi((acpi_madt_lapic_nmi_t *)current,
ACPI_MADT_LAPIC_NMI_ALL_PROCESSORS, flags, 1);
if (!CONFIG(XAPIC_ONLY))
current += acpi_create_madt_lx2apic_nmi((acpi_madt_lx2apic_nmi_t *)current,
ACPI_MADT_LX2APIC_NMI_ALL_PROCESSORS, flags, 1);
return current;
}
static unsigned long acpi_create_madt_lapics_with_nmis(unsigned long current)
{
current = acpi_create_madt_lapics(current);
current = acpi_create_madt_lapic_nmis(current);
return current;
}
int acpi_create_srat_lapic(acpi_srat_lapic_t *lapic, u8 node, u8 apic)
{
memset((void *)lapic, 0, sizeof(acpi_srat_lapic_t));
lapic->type = 0; /* Processor local APIC/SAPIC affinity structure */
lapic->length = sizeof(acpi_srat_lapic_t);
lapic->flags = (1 << 0); /* Enabled (the use of this structure). */
lapic->proximity_domain_7_0 = node;
/* TODO: proximity_domain_31_8, local SAPIC EID, clock domain. */
lapic->apic_id = apic;
return lapic->length;
}
int acpi_create_srat_x2apic(acpi_srat_x2apic_t *x2apic, u32 node, u32 apic)
{
memset((void *)x2apic, 0, sizeof(acpi_srat_x2apic_t));
x2apic->type = 2; /* Processor x2APIC structure */
x2apic->length = sizeof(acpi_srat_x2apic_t);
x2apic->flags = (1 << 0); /* Enabled (the use of this structure). */
x2apic->proximity_domain = node;
x2apic->x2apic_id = apic;
return x2apic->length;
}
unsigned long acpi_arch_fill_madt(acpi_madt_t *madt, unsigned long current)
{
madt->lapic_addr = cpu_get_lapic_addr();
if (CONFIG(ACPI_HAVE_PCAT_8259))
madt->flags |= 1;
if (CONFIG(ACPI_COMMON_MADT_LAPIC))
current = acpi_create_madt_lapics_with_nmis(current);
if (CONFIG(ACPI_COMMON_MADT_IOAPIC))
current = acpi_create_madt_ioapic_gsi0_default(current);
return current;
}
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