diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 273f08f..5e42d7d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -349,6 +349,15 @@ config GENERATE_MP_TABLE
 	  multiprocessing as well as symmetric I/O interrupt handling with
 	  the local APIC and I/O APIC.
 
+config GENERATE_ACPI_TABLE
+	bool "Generate an ACPI (Advanced Configuration and Power Interface) table"
+	default n
+	help
+	  The Advanced Configuration and Power Interface (ACPI) specification
+	  provides an open standard for device configuration and management
+	  by the operating system. It defines platform-independent interfaces
+	  for configuration and power management monitoring.
+
 endmenu
 
 config MAX_PIRQ_LINKS
diff --git a/arch/x86/include/asm/acpi_table.h b/arch/x86/include/asm/acpi_table.h
new file mode 100644
index 0000000..cceed97
--- /dev/null
+++ b/arch/x86/include/asm/acpi_table.h
@@ -0,0 +1,390 @@
+/*
+ * 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 <malloc.h>
+#include <asm/post.h>
+#include <linux/string.h>
+
+#define	RSDP_SIG	"RSD PTR "	/* RSDT pointer signature */
+#define	ACPI_TABLE_CREATOR	"UBOOT   "	/* Must be 8 bytes long! */
+#define	OEM_ID	"UBOOT "	/* Must be 6 bytes long! */
+#define	ASLC	"INTL"	/* Must be exactly 4 bytes long! */
+
+#define	OEM_REVISION	42
+#define	ASL_COMPILER_REVISION	42
+
+/*IO ports to generate SMIs*/
+#define	APM_CNT	0xb2
+#define	APM_CNT_CST_CONTROL	0x85
+#define	APM_CNT_PST_CONTROL	0x80
+#define	APM_CNT_ACPI_DISABLE	0x1e
+#define	APM_CNT_ACPI_ENABLE	0xe1
+#define	APM_CNT_MBI_UPDATE	0xeb
+#define	APM_CNT_GNVS_UPDATE	0xea
+#define	APM_CNT_FINALIZE	0xcb
+#define	APM_CNT_LEGACY	0xcc
+#define	APM_ST	0xb3
+
+/* Multiple Processor Interrupts*/
+#define	MP_IRQ_POLARITY_DEFAULT	0x0
+#define	MP_IRQ_POLARITY_HIGH	0x1
+#define	MP_IRQ_POLARITY_LOW	0x3
+#define	MP_IRQ_POLARITY_MASK	0x3
+#define	MP_IRQ_TRIGGER_DEFAULT	0x0
+#define	MP_IRQ_TRIGGER_EDGE	0x4
+#define	MP_IRQ_TRIGGER_LEVEL	0xc
+#define	MP_IRQ_TRIGGER_MASK	0xc
+
+/*
+ * Interrupt assigned for SCI in order to
+ * create the ACPI MADT IRQ override entry
+ */
+#define	ACTL	0x00
+#define	SCIS_MASK	0x07
+#define	SCIS_IRQ9	0x00
+#define	SCIS_IRQ10	0x01
+#define	SCIS_IRQ11	0x02
+#define	SCIS_IRQ20	0x04
+#define	SCIS_IRQ21	0x05
+#define	SCIS_IRQ22	0x06
+#define	SCIS_IRQ23	0x07
+
+#define	ACPI_REV_ACPI_1_0	1
+#define	ACPI_REV_ACPI_2_0	1
+#define	ACPI_REV_ACPI_3_0	2
+#define	ACPI_REV_ACPI_4_0	3
+#define	ACPI_REV_ACPI_5_0	5
+
+#define	ACPI_RSDP_REV_ACPI_1_0	0
+#define	ACPI_RSDP_REV_ACPI_2_0	2
+
+typedef struct acpi_gen_regaddr {
+	u8  space_id;    /* Address space ID */
+	u8  bit_width;   /* Register size in bits */
+	u8  bit_offset;  /* Register bit offset */
+	union {
+		/* Reserved in ACPI 2.0 - 2.0b */
+		u8  resv;
+		/* Access size in ACPI 2.0c/3.0/4.0/5.0 */
+		u8  access_size;
+	};
+	u32 addrl; /* Register address, low 32 bits */
+	u32 addrh; /* Register address, high 32 bits */
+} acpi_addr_t;
+
+
+/* RSDP (Root System Description Pointer)
+Note: ACPI 1.0 didn't have length, xsdt_address, and ext_checksum. */
+struct acpi_rsdp {
+	char  signature[8];	/* RSDP signature */
+	u8    checksum;		/* Checksum of the first 20 bytes */
+	char  oem_id[6];	/* OEM ID */
+	u8    revision;		/* 0 for ACPI 1.0, 2 for ACPI 2.0/3.0/4.0 */
+	u32   rsdt_address;	/* Physical address of RSDT (32 bits) */
+	u32   length;		/* Total RSDP length (incl. extended part) */
+	u64   xsdt_address;	/* Physical address of XSDT (64 bits) */
+	u8    ext_checksum;	/* Checksum of the whole table */
+	u8    reserved[3];
+};
+
+enum acpi_address_space_type {
+	ACPI_ADDRESS_SPACE_MEMORY = 0,	/* System memory */
+	ACPI_ADDRESS_SPACE_IO = 1,	/* System I/O */
+	ACPI_ADDRESS_SPACE_PCI = 2,	/* PCI config space */
+	ACPI_ADDRESS_SPACE_EC = 3,	/* Embedded controller */
+	ACPI_ADDRESS_SPACE_SMBUS = 4,	/* SMBus */
+	ACPI_ADDRESS_SPACE_PCC = 0x0a,	/* Platform Comm. Channel */
+	ACPI_ADDRESS_SPACE_FIXED = 0x7f	/* Functional fixed hardware */
+};
+
+/* functional fixed hardware */
+#define	ACPI_FFIXEDHW_VENDOR_INTEL	1	/* Intel */
+#define	ACPI_FFIXEDHW_CLASS_HLT	0	/* C1 Halt */
+#define	ACPI_FFIXEDHW_CLASS_IO_HLT	1	/* C1 I/O then Halt */
+#define	ACPI_FFIXEDHW_CLASS_MWAIT	2	/* MWAIT Native C-state */
+#define	ACPI_FFIXEDHW_FLAG_HW_COORD	1	/* Hardware Coordination bit */
+#define	ACPI_FFIXEDHW_FLAG_BM_STS	2	/* BM_STS avoidance bit */
+
+/* Access size definitions for Generic address structure */
+enum acpi_address_space_size {
+	ACPI_ACCESS_SIZE_UNDEFINED = 0,	/* Undefined (legacy reasons) */
+	ACPI_ACCESS_SIZE_BYTE_ACCESS = 1,
+	ACPI_ACCESS_SIZE_WORD_ACCESS = 2,
+	ACPI_ACCESS_SIZE_DWORD_ACCESS = 3,
+	ACPI_ACCESS_SIZE_QWORD_ACCESS = 4
+};
+
+/* Generic ACPI header, provided by (almost) all tables */
+typedef struct acpi_table_header {
+	char signature[4];           /* ACPI signature (4 ASCII characters) */
+	u32  length;                 /* Table length in bytes (incl. header) */
+	u8   revision;               /* Table version (not ACPI version!) */
+	volatile u8 checksum;        /* To make sum of entire table == 0 */
+	char oem_id[6];              /* OEM identification */
+	char oem_table_id[8];        /* OEM table identification */
+	u32  oem_revision;           /* OEM revision number */
+	char asl_compiler_id[4];     /* ASL compiler vendor ID */
+	u32  asl_compiler_revision;  /* ASL compiler revision number */
+} acpi_header_t;
+
+/* A maximum number of 32 ACPI tables ought to be enough for now */
+#define	MAX_ACPI_TABLES	32
+
+/* RSDT (Root System Description Table) */
+struct acpi_rsdt {
+	struct acpi_table_header header;
+	u32 entry[MAX_ACPI_TABLES];
+};
+
+/* XSDT (Extended System Description Table) */
+struct acpi_xsdt {
+	struct acpi_table_header header;
+	u64 entry[MAX_ACPI_TABLES];
+};
+
+/* MCFG (PCI Express MMIO config space BAR description table) */
+struct acpi_mcfg {
+	struct acpi_table_header header;
+	u8 reserved[8];
+};
+
+struct acpi_mcfg_mmconfig {
+	u32 base_address;
+	u32 base_reserved;
+	u16 pci_segment_group_number;
+	u8 start_bus_number;
+	u8 end_bus_number;
+	u8 reserved[4];
+};
+
+/* MADT (Multiple APIC Description Table) */
+struct acpi_madt {
+	struct acpi_table_header header;
+	u32 lapic_addr;			/* Local APIC address */
+	u32 flags;			/* Multiple APIC flags */
+} acpi_madt_t;
+
+enum dev_scope_type {
+	SCOPE_PCI_ENDPOINT = 1,
+	SCOPE_PCI_SUB = 2,
+	SCOPE_IOAPIC = 3,
+	SCOPE_MSI_HPET = 4
+};
+
+typedef struct dev_scope {
+	u8 type;
+	u8 length;
+	u8 reserved[2];
+	u8 enumeration;
+	u8 start_bus;
+	struct {
+		u8 dev;
+		u8 fn;
+	} path[0];
+} __packed dev_scope_t;
+
+/* MADT: APIC Structure Type*/
+enum acpi_apic_types {
+	LOCALAPIC	= 0,	/* Processor local APIC */
+	IOAPIC = 1, /* I/O APIC */
+	IRQSOURCEOVERRIDE = 2, /* Interrupt source override */
+	NMITYPE = 3, /* NMI source */
+	LOCALNMITYPE = 4, /* Local APIC NMI */
+	LAPICADDRESSOVERRIDE = 5, /* Local APIC address override */
+	IOSAPIC = 6, /* I/O SAPIC */
+	LOCALSAPIC = 7, /* Local SAPIC */
+	PLATFORMIRQSOURCES = 8, /* Platform interrupt sources */
+	LOCALX2SAPIC = 9, /* Processor local x2APIC */
+	LOCALX2APICNMI	= 10, /* Local x2APIC NMI */
+};
+
+/* MADT: Processor Local APIC Structure */
+struct acpi_madt_lapic {
+	u8 type;			     /* Type (0) */
+	u8 length;			/* Length in bytes (8) */
+	u8 processor_id;		/* ACPI processor ID */
+	u8 apic_id;			/* Local APIC ID */
+	u32 flags;			/* Local APIC flags */
+};
+
+#define	LOCAL_APIC_FLAG_ENABLED	(1 << 0)
+/* bits 1-31: reserved */
+#define	PCAT_COMPAT	(1 << 0)
+/* bits 1-31: reserved */
+
+/* MADT: Local APIC NMI Structure */
+struct acpi_madt_lapic_nmi {
+	u8 type;			/* Type (4) */
+	u8 length;		/* Length in bytes (6) */
+	u8 processor_id;	/* ACPI processor ID */
+	u16 flags;		/* MPS INTI flags */
+	u8 lint;			/* Local APIC LINT# */
+};
+
+/* MADT: I/O APIC Structure */
+struct acpi_madt_ioapic {
+	u8 type;			/* Type (1) */
+	u8 length;		/* Length in bytes (12) */
+	u8 ioapic_id;		/* I/O APIC ID */
+	u8 reserved;
+	u32 ioapic_addr;	/* I/O APIC address */
+	u32 gsi_base;		/* Global system interrupt base */
+};
+
+/* MADT: Interrupt Source Override Structure */
+struct acpi_madt_irqoverride {
+	u8 type;			/* Type (2) */
+	u8 length;		/* Length in bytes (10) */
+	u8 bus;			/* ISA (0) */
+	u8 source;		/* Bus-relative int. source (IRQ) */
+	u32 gsirq;		/* Global system interrupt */
+	u16 flags;		/* MPS INTI flags */
+};
+
+/* FADT (Fixed ACPI Description Table) */
+struct __packed acpi_fadt {
+	struct acpi_table_header header;
+	u32 firmware_ctrl;
+	u32 dsdt;
+	u8 model;
+	u8 preferred_pm_profile;
+	u16 sci_int;
+	u32 smi_cmd;
+	u8 acpi_enable;
+	u8 acpi_disable;
+	u8 s4bios_req;
+	u8 pstate_cnt;
+	u32 pm1a_evt_blk;
+	u32 pm1b_evt_blk;
+	u32 pm1a_cnt_blk;
+	u32 pm1b_cnt_blk;
+	u32 pm2_cnt_blk;
+	u32 pm_tmr_blk;
+	u32 gpe0_blk;
+	u32 gpe1_blk;
+	u8 pm1_evt_len;
+	u8 pm1_cnt_len;
+	u8 pm2_cnt_len;
+	u8 pm_tmr_len;
+	u8 gpe0_blk_len;
+	u8 gpe1_blk_len;
+	u8 gpe1_base;
+	u8 cst_cnt;
+	u16 p_lvl2_lat;
+	u16 p_lvl3_lat;
+	u16 flush_size;
+	u16 flush_stride;
+	u8 duty_offset;
+	u8 duty_width;
+	u8 day_alrm;
+	u8 mon_alrm;
+	u8 century;
+	u16 iapc_boot_arch;
+	u8 res2;
+	u32 flags;
+	struct acpi_gen_regaddr reset_reg;
+	u8 reset_value;
+	u8 res3;
+	u8 res4;
+	u8 res5;
+	u32 x_firmware_ctl_l;
+	u32 x_firmware_ctl_h;
+	u32 x_dsdt_l;
+	u32 x_dsdt_h;
+	struct acpi_gen_regaddr x_pm1a_evt_blk;
+	struct acpi_gen_regaddr x_pm1b_evt_blk;
+	struct acpi_gen_regaddr x_pm1a_cnt_blk;
+	struct acpi_gen_regaddr x_pm1b_cnt_blk;
+	struct acpi_gen_regaddr x_pm2_cnt_blk;
+	struct acpi_gen_regaddr x_pm_tmr_blk;
+	struct acpi_gen_regaddr x_gpe0_blk;
+	struct acpi_gen_regaddr x_gpe1_blk;
+};
+
+/* Flags for p_lvl2_lat and p_lvl3_lat */
+#define	ACPI_FADT_C2_NOT_SUPPORTED	101
+#define	ACPI_FADT_C3_NOT_SUPPORTED	1001
+
+/* FADT Feature Flags */
+#define	ACPI_FADT_WBINVD	(1 << 0)
+#define	ACPI_FADT_WBINVD_FLUSH	(1 << 1)
+#define	ACPI_FADT_C1_SUPPORTED	(1 << 2)
+#define	ACPI_FADT_C2_MP_SUPPORTED	(1 << 3)
+#define	ACPI_FADT_POWER_BUTTON	(1 << 4)
+#define	ACPI_FADT_SLEEP_BUTTON	(1 << 5)
+#define	ACPI_FADT_FIXED_RTC	(1 << 6)
+#define	ACPI_FADT_S4_RTC_WAKE	(1 << 7)
+#define	ACPI_FADT_32BIT_TIMER	(1 << 8)
+#define	ACPI_FADT_DOCKING_SUPPORTED	(1 << 9)
+#define	ACPI_FADT_RESET_REGISTER	(1 << 10)
+#define	ACPI_FADT_SEALED_CASE	(1 << 11)
+#define	ACPI_FADT_HEADLESS	(1 << 12)
+#define	ACPI_FADT_SLEEP_TYPE	(1 << 13)
+#define	ACPI_FADT_PCI_EXPRESS_WAKE	(1 << 14)
+#define	ACPI_FADT_PLATFORM_CLOCK	(1 << 15)
+#define	ACPI_FADT_S4_RTC_VALID	(1 << 16)
+#define	ACPI_FADT_REMOTE_POWER_ON	(1 << 17)
+#define	ACPI_FADT_APIC_CLUSTER	(1 << 18)
+#define	ACPI_FADT_APIC_PHYSICAL	(1 << 19)
+/* Bits 20-31: reserved ACPI 3.0 & 4.0 */
+#define	ACPI_FADT_HW_REDUCED_ACPI	(1 << 20)
+#define	ACPI_FADT_LOW_PWR_IDLE_S0	(1 << 21)
+/* bits 22-31: reserved ACPI 5.0 */
+
+/* FADT Boot Architecture Flags */
+#define	ACPI_FADT_LEGACY_DEVICES	(1 << 0)
+#define	ACPI_FADT_8042	(1 << 1)
+#define	ACPI_FADT_VGA_NOT_PRESENT	(1 << 2)
+#define	ACPI_FADT_MSI_NOT_SUPPORTED	(1 << 3)
+#define	ACPI_FADT_NO_PCIE_ASPM_CONTROL	(1 << 4)
+#define	ACPI_FADT_LEGACY_FREE	0x00	/* No legacy devices (including 8042) */
+
+/* FADT Preferred Power Management Profile */
+#define	PM_UNSPECIFIED	0
+#define	PM_DESKTOP	1
+#define	PM_MOBILE	2
+#define	PM_WORKSTATION	3
+#define	PM_ENTERPRISE_SERVER	4
+#define	PM_SOHO_SERVER	5
+#define	PM_APPLIANCE_PC	6
+#define	PM_PERFORMANCE_SERVER	7
+#define	PM_TABLET	8, /* ACPI 5.0 */
+
+/* FACS (Firmware ACPI Control Structure) */
+struct acpi_facs {
+	char signature[4];			/* "FACS" */
+	u32 length;				/* Length in bytes (>= 64) */
+	u32 hardware_signature;			/* Hardware signature */
+	u32 firmware_waking_vector;		/* Firmware waking vector */
+	u32 global_lock;			/* Global lock */
+	u32 flags;				/* FACS flags */
+	u32 x_firmware_waking_vector_l;		/* X FW waking vector, low */
+	u32 x_firmware_waking_vector_h;		/* X FW waking vector, high */
+	u8 version;				/* ACPI 4.0: 2 */
+	u8 resv[31];				/* FIXME: 4.0: ospm_flags */
+};
+
+/* FACS flags */
+#define	ACPI_FACS_S4BIOS_F	(1 << 0)
+#define	ACPI_FACS_64BIT_WAKE_F	(1 << 1)
+/* Bits 31..2: reserved */
+
+/* These can be used by the target port. */
+
+unsigned long acpi_create_madt_lapics(unsigned long current);
+int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, u32 addr,
+			 u32 gsi_base);
+int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride,
+			 u8 bus, u8 source, u32 gsirq, u16 flags);
+unsigned long acpi_fill_madt(unsigned long current);
+void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
+			 void *dsdt);
+int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi, u8 cpu,
+			 u16 flags, u8 lint);
+unsigned long write_acpi_tables(unsigned long start);
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index dcfe9ee..6ecd6db 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -30,6 +30,7 @@ obj-y += physmem.o
 obj-$(CONFIG_X86_RAMTEST) += ramtest.o
 obj-y += sfi.o
 obj-y	+= string.o
+obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o
 obj-y	+= tables.o
 obj-$(CONFIG_SYS_X86_TSC_TIMER)	+= tsc_timer.o
 obj-$(CONFIG_CMD_ZBOOT)	+= zimage.o
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
new file mode 100644
index 0000000..23b8dca
--- /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;
+}
diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c
index 75ffbc1..f15b2e2 100644
--- a/arch/x86/lib/tables.c
+++ b/arch/x86/lib/tables.c
@@ -8,6 +8,7 @@
 #include <asm/sfi.h>
 #include <asm/mpspec.h>
 #include <asm/tables.h>
+#include <asm/acpi_table.h>
 
 u8 table_compute_checksum(void *v, int len)
 {
@@ -51,4 +52,8 @@ void write_tables(void)
 	rom_table_end = write_mp_table(rom_table_end);
 	rom_table_end = ALIGN(rom_table_end, 1024);
 #endif
+#ifdef CONFIG_GENERATE_ACPI_TABLE
+	rom_table_end = write_acpi_tables(rom_table_end);
+	rom_table_end = ALIGN(rom_table_end, 1024);
+#endif
 }
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 1c949fc..ed30bf5 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -297,6 +297,17 @@ $(obj)/%.dtb: $(src)/%.dts FORCE
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 
+# ACPI
+# ---------------------------------------------------------------------------
+quiet_cmd_acpi_c_asl= ASL     $@
+cmd_acpi_c_asl=         \
+	$(CPP) -x assembler-with-cpp -P -o $<.tmp $<; \
+	iasl -p $< -tc -va $<.tmp; \
+	mv $(patsubst %.asl,%.hex,$<) $@
+
+$(obj)/%.c:    $(src)/%.asl
+	$(call cmd,acpi_c_asl)
+
 # Bzip2
 # ---------------------------------------------------------------------------
 
