1 files changed, 436 insertions, 0 deletions
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
new file mode 100644
index 0000000..ab1db7e
--- /dev/null
+++ b/arch/x86/lib/acpi_table.c
@@ -0,0 +1,436 @@
+/*
+ * Based on acpi.c from coreboot
+ *
+ * Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <cpu.h>
+#include <dm.h>
+#include <dm/uclass-internal.h>
+#include <dm/lists.h>
+#include <asm/acpi_table.h>
+#include <asm/cpu.h>
+#include <asm/ioapic.h>
+#include <asm/lapic.h>
+#include <asm/tables.h>
+#include <asm/pci.h>
+
+/*
+ * IASL compiles the dsdt entries and
+ * writes the hex values to AmlCode array.
+ * CamelCase cannot be handled here.
+ */
+extern const unsigned char AmlCode[];
+
+/**
+* Add an ACPI table to the RSDT (and XSDT) structure, recalculate length
+* and checksum.
+*/
+static void acpi_add_table(struct acpi_rsdp *rsdp, void *table)
+{
+	int i, entries_num;
+	struct acpi_rsdt *rsdt;
+	struct acpi_xsdt *xsdt = NULL;
+
+	/* The RSDT is mandatory while the XSDT is not */
+	rsdt = (struct acpi_rsdt *)rsdp->rsdt_address;
+
+	if (rsdp->xsdt_address)
+		xsdt = (struct acpi_xsdt *)((u32)rsdp->xsdt_address);
+
+	/* This should always be MAX_ACPI_TABLES */
+	entries_num = ARRAY_SIZE(rsdt->entry);
+
+	for (i = 0; i < entries_num; i++) {
+		if (rsdt->entry[i] == 0)
+			break;
+	}
+
+	if (i >= entries_num) {
+		debug("ACPI: Error: too many tables.\n");
+		return;
+	}
+
+	/* Add table to the RSDT */
+	rsdt->entry[i] = (u32)table;
+
+	/* Fix RSDT length or the kernel will assume invalid entries */
+	rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i + 1));
+
+	/* Re-calculate checksum */
+	rsdt->header.checksum = 0;
+	rsdt->header.checksum = table_compute_checksum((u8 *)rsdt,
+						       rsdt->header.length);
+
+	/*
+	 * And now the same thing for the XSDT. We use the same index as for
+	 * now we want the XSDT and RSDT to always be in sync in U-Boot
+	 */
+	if (xsdt) {
+		/* Add table to the XSDT */
+		xsdt->entry[i] = (u64)(u32)table;
+
+		/* Fix XSDT length */
+		xsdt->header.length = sizeof(acpi_header_t) +
+			 (sizeof(u64) * (i + 1));
+
+		/* Re-calculate checksum */
+		xsdt->header.checksum = 0;
+		xsdt->header.checksum = table_compute_checksum((u8 *)xsdt,
+				xsdt->header.length);
+	}
+}
+
+static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic,
+			 u8 cpu, u8 apic)
+{
+	lapic->type = LOCALAPIC; /* Local APIC structure */
+	lapic->length = sizeof(struct acpi_madt_lapic);
+	lapic->flags = LOCAL_APIC_FLAG_ENABLED; /* Processor/LAPIC enabled */
+	lapic->processor_id = cpu;
+	lapic->apic_id = apic;
+
+	return lapic->length;
+}
+
+unsigned long acpi_create_madt_lapics(unsigned long current)
+{
+	struct udevice *dev;
+
+	for (uclass_find_first_device(UCLASS_CPU, &dev);
+	     dev;
+	     uclass_find_next_device(&dev)) {
+		struct cpu_platdata *plat = dev_get_parent_platdata(dev);
+
+		current += acpi_create_madt_lapic(
+			(struct acpi_madt_lapic *)current,
+			plat->cpu_id, plat->cpu_id);
+		}
+		return current;
+}
+
+int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, u32 addr,
+			 u32 gsi_base)
+{
+	ioapic->type = IOAPIC;
+	ioapic->length = sizeof(struct acpi_madt_ioapic);
+	ioapic->reserved = 0x00;
+	ioapic->gsi_base = gsi_base;
+	ioapic->ioapic_id = id;
+	ioapic->ioapic_addr = addr;
+
+	return ioapic->length;
+}
+
+int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride,
+			 u8 bus, u8 source, u32 gsirq, u16 flags)
+{
+	irqoverride->type = IRQSOURCEOVERRIDE;
+	irqoverride->length = sizeof(struct acpi_madt_irqoverride);
+	irqoverride->bus = bus;
+	irqoverride->source = source;
+	irqoverride->gsirq = gsirq;
+	irqoverride->flags = flags;
+
+	return irqoverride->length;
+}
+
+int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi,
+			 u8 cpu, u16 flags, u8 lint)
+{
+	lapic_nmi->type = LOCALNMITYPE;
+	lapic_nmi->length = sizeof(struct acpi_madt_lapic_nmi);
+	lapic_nmi->flags = flags;
+	lapic_nmi->processor_id = cpu;
+	lapic_nmi->lint = lint;
+
+	return lapic_nmi->length;
+}
+
+static void fill_header(acpi_header_t *header, char *signature, int length)
+{
+	memcpy(header->signature, signature, length);
+	memcpy(header->oem_id, OEM_ID, 6);
+	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
+	memcpy(header->asl_compiler_id, ASLC, 4);
+}
+
+static void acpi_create_madt(struct acpi_madt *madt)
+{
+	acpi_header_t *header = &(madt->header);
+	unsigned long current = (unsigned long)madt + sizeof(struct acpi_madt);
+
+	memset((void *)madt, 0, sizeof(struct acpi_madt));
+
+	/* Fill out header fields */
+	fill_header(header, "APIC", 4);
+	header->length = sizeof(struct acpi_madt);
+
+	/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
+	header->revision = ACPI_REV_ACPI_2_0;
+
+	madt->lapic_addr = LAPIC_DEFAULT_BASE;
+	madt->flags = PCAT_COMPAT;
+
+	current = acpi_fill_madt(current);
+
+	/* (Re)calculate length and checksum */
+	header->length = current - (unsigned long)madt;
+
+	header->checksum = table_compute_checksum((void *)madt, header->length);
+}
+
+static int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig,
+			 u32 base, u16 seg_nr, u8 start, u8 end)
+{
+	memset(mmconfig, 0, sizeof(*mmconfig));
+	mmconfig->base_address = base;
+	mmconfig->base_reserved = 0;
+	mmconfig->pci_segment_group_number = seg_nr;
+	mmconfig->start_bus_number = start;
+	mmconfig->end_bus_number = end;
+
+	return sizeof(struct acpi_mcfg_mmconfig);
+}
+
+static unsigned long acpi_fill_mcfg(unsigned long current)
+{
+	current += acpi_create_mcfg_mmconfig
+		((struct acpi_mcfg_mmconfig *)current,
+		 CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255);
+
+	return current;
+}
+
+/* MCFG is defined in the PCI Firmware Specification 3.0 */
+static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
+{
+	acpi_header_t *header = &(mcfg->header);
+	unsigned long current = (unsigned long)mcfg + sizeof(struct acpi_mcfg);
+
+	memset((void *)mcfg, 0, sizeof(struct acpi_mcfg));
+
+	/* Fill out header fields */
+	fill_header(header, "MCFG", 4);
+	header->length = sizeof(struct acpi_mcfg);
+
+	/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
+	header->revision = ACPI_REV_ACPI_2_0;
+
+	current = acpi_fill_mcfg(current);
+
+	/* (Re)calculate length and checksum */
+	header->length = current - (unsigned long)mcfg;
+	header->checksum = table_compute_checksum((void *)mcfg, header->length);
+}
+
+static void acpi_create_facs(struct acpi_facs *facs)
+{
+	memset((void *)facs, 0, sizeof(struct acpi_facs));
+
+	memcpy(facs->signature, "FACS", 4);
+	facs->length = sizeof(struct acpi_facs);
+	facs->hardware_signature = 0;
+	facs->firmware_waking_vector = 0;
+	facs->global_lock = 0;
+	facs->flags = 0;
+	facs->x_firmware_waking_vector_l = 0;
+	facs->x_firmware_waking_vector_h = 0;
+	facs->version = 1; /* ACPI 1.0: 0, ACPI 2.0/3.0: 1, ACPI 4.0: 2 */
+}
+
+static void acpi_write_rsdt(struct acpi_rsdt *rsdt)
+{
+	acpi_header_t *header = &(rsdt->header);
+
+	/* Fill out header fields */
+	fill_header(header, "RSDT", 4);
+	header->length = sizeof(struct acpi_rsdt);
+
+	/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
+	header->revision = ACPI_REV_ACPI_2_0;
+
+	/* Entries are filled in later, we come with an empty set */
+
+	/* Fix checksum */
+	header->checksum = table_compute_checksum((void *)rsdt,
+			sizeof(struct acpi_rsdt));
+}
+
+static void acpi_write_xsdt(struct acpi_xsdt *xsdt)
+{
+	acpi_header_t *header = &(xsdt->header);
+
+	/* Fill out header fields */
+	fill_header(header, "XSDT", 4);
+	header->length = sizeof(struct acpi_xsdt);
+
+	/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
+	header->revision = ACPI_REV_ACPI_2_0;
+
+	/* Entries are filled in later, we come with an empty set */
+
+	/* Fix checksum */
+	header->checksum = table_compute_checksum((void *)xsdt,
+			sizeof(struct acpi_xsdt));
+}
+
+static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt,
+			 struct acpi_xsdt *xsdt)
+{
+	memset(rsdp, 0, sizeof(struct acpi_rsdp));
+
+	memcpy(rsdp->signature, RSDP_SIG, 8);
+	memcpy(rsdp->oem_id, OEM_ID, 6);
+
+	rsdp->length = sizeof(struct acpi_rsdp);
+	rsdp->rsdt_address = (u32)rsdt;
+
+	/*
+	* Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2
+	*
+	* Some OSes expect an XSDT to be present for RSD PTR revisions >= 2.
+	* If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR
+	* revision 0)
+	*/
+	if (xsdt == NULL) {
+		rsdp->revision = ACPI_RSDP_REV_ACPI_1_0;
+	} else {
+		rsdp->xsdt_address = (u64)(u32)xsdt;
+		rsdp->revision = ACPI_RSDP_REV_ACPI_2_0;
+	}
+
+	/* Calculate checksums */
+	rsdp->checksum = table_compute_checksum((void *)rsdp, 20);
+	rsdp->ext_checksum = table_compute_checksum((void *)rsdp,
+			sizeof(struct acpi_rsdp));
+}
+
+static void acpi_create_ssdt_generator(acpi_header_t *ssdt,
+			 const char *oem_table_id)
+{
+	unsigned long current = (unsigned long)ssdt + sizeof(acpi_header_t);
+
+	memset((void *)ssdt, 0, sizeof(acpi_header_t));
+
+	memcpy(&ssdt->signature, "SSDT", 4);
+	/* Access size in ACPI 2.0c/3.0/4.0/5.0 */
+	ssdt->revision = ACPI_REV_ACPI_3_0;
+	memcpy(&ssdt->oem_id, OEM_ID, 6);
+	memcpy(&ssdt->oem_table_id, oem_table_id, 8);
+	ssdt->oem_revision = OEM_REVISION;
+	memcpy(&ssdt->asl_compiler_id, ASLC, 4);
+	ssdt->asl_compiler_revision = ASL_COMPILER_REVISION;
+	ssdt->length = sizeof(acpi_header_t);
+
+	/* (Re)calculate length and checksum */
+	ssdt->length = current - (unsigned long)ssdt;
+	ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length);
+}
+
+unsigned long write_acpi_tables(unsigned long start)
+{
+	unsigned long current;
+	struct acpi_rsdp *rsdp;
+	struct acpi_rsdt *rsdt;
+	struct acpi_xsdt *xsdt;
+	struct acpi_facs *facs;
+	acpi_header_t *dsdt;
+	struct acpi_fadt *fadt;
+	struct acpi_mcfg *mcfg;
+	struct acpi_madt *madt;
+	acpi_header_t *ssdt;
+
+	current = start;
+
+	/* Align ACPI tables to 16byte */
+	current = ALIGN(current, 16);
+
+	debug("ACPI: Writing ACPI tables at %lx.\n", start);
+
+	/* We need at least an RSDP and an RSDT Table */
+	rsdp = (struct acpi_rsdp *)current;
+	current += sizeof(struct acpi_rsdp);
+	current = ALIGN(current, 16);
+	rsdt = (struct acpi_rsdt *)current;
+	current += sizeof(struct acpi_rsdt);
+	current = ALIGN(current, 16);
+	xsdt = (struct acpi_xsdt *)current;
+	current += sizeof(struct acpi_xsdt);
+	current = ALIGN(current, 16);
+
+	/* clear all table memory */
+	memset((void *)start, 0, current - start);
+
+	acpi_write_rsdp(rsdp, rsdt, xsdt);
+	acpi_write_rsdt(rsdt);
+	acpi_write_xsdt(xsdt);
+
+	debug("ACPI:    * FACS\n");
+	facs = (struct acpi_facs *)current;
+	current += sizeof(struct acpi_facs);
+	current = ALIGN(current, 16);
+
+	acpi_create_facs(facs);
+
+	debug("ACPI:    * DSDT\n");
+	dsdt = (acpi_header_t *)current;
+	memcpy(dsdt, &AmlCode, sizeof(acpi_header_t));
+	if (dsdt->length >= sizeof(acpi_header_t)) {
+		current += sizeof(acpi_header_t);
+		memcpy((char *)current,
+				(char *)&AmlCode + sizeof(acpi_header_t),
+				dsdt->length - sizeof(acpi_header_t));
+		current += dsdt->length - sizeof(acpi_header_t);
+
+		/* (Re)calculate length and checksum */
+		dsdt->length = current - (unsigned long)dsdt;
+		dsdt->checksum = 0;
+		dsdt->checksum = table_compute_checksum((void *)dsdt,
+				dsdt->length);
+	}
+	current = ALIGN(current, 16);
+
+	debug("ACPI:    * FADT\n");
+	fadt = (struct acpi_fadt *)current;
+	current += sizeof(struct acpi_fadt);
+	current = ALIGN(current, 16);
+	acpi_create_fadt(fadt, facs, dsdt);
+	acpi_add_table(rsdp, fadt);
+
+	debug("ACPI:    * MCFG\n");
+	mcfg = (struct acpi_mcfg *)current;
+	acpi_create_mcfg(mcfg);
+	if (mcfg->header.length > sizeof(struct acpi_mcfg)) {
+		current += mcfg->header.length;
+		current = ALIGN(current, 16);
+		acpi_add_table(rsdp, mcfg);
+	}
+
+	debug("ACPI:    * MADT\n");
+	madt = (struct acpi_madt *)current;
+	acpi_create_madt(madt);
+	if (madt->header.length > sizeof(struct acpi_madt)) {
+		current += madt->header.length;
+		acpi_add_table(rsdp, madt);
+	}
+	current = ALIGN(current, 16);
+
+	debug("ACPI:    * SSDT\n");
+	ssdt = (acpi_header_t *)current;
+	acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR);
+	if (ssdt->length > sizeof(acpi_header_t)) {
+		current += ssdt->length;
+		acpi_add_table(rsdp, ssdt);
+		current = ALIGN(current, 16);
+	}
+
+	debug("current = %lx\n", current);
+
+	debug("ACPI: done.\n");
+
+	return current;
+}