acpi/acpi.c: Split of ACPI table generation into separate files

acpi.c contains architectural specific things like IOAPIC, legacy IRQ,
DMAR, HPET, ... all which require the presence of architectural headers.

Instead of littering the code with #if ENV_X86 move the functions to
different compilation units.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: I5083b26c0d4cc6764b4e3cb0ff586797cae7e3af
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76008
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>

1 files changed, 229 insertions, 0 deletions

diff --git a/src/acpi/acpi_apic.c b/src/acpi/acpi_apic.c
new file mode 100644
index 0000000000..38daaab514
--- /dev/null
+++ b/src/acpi/acpi_apic.c
@@ -0,0 +1,229 @@
+/* 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>
+
+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;
+}
+
+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;
+}
+
+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;
+}