ACPI support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1902 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 609 insertions, 0 deletions

diff --git a/hw/acpi.c b/hw/acpi.c
new file mode 100644
index 0000000000..9053142f3e
--- /dev/null
+++ b/hw/acpi.c
@@ -0,0 +1,609 @@
+/*
+ * ACPI implementation
+ * 
+ * Copyright (c) 2006 Fabrice Bellard
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include "vl.h"
+
+//#define DEBUG
+
+/* i82731AB (PIIX4) compatible power management function */
+#define PM_FREQ 3579545
+
+/* XXX: make them variable */
+#define PM_IO_BASE        0xb000
+#define SMI_CMD_IO_ADDR   0xb040
+#define ACPI_DBG_IO_ADDR  0xb044
+
+typedef struct PIIX4PMState {
+    PCIDevice dev;
+    uint16_t pmsts;
+    uint16_t pmen;
+    uint16_t pmcntrl;
+    QEMUTimer *tmr_timer;
+    int64_t tmr_overflow_time;
+} PIIX4PMState;
+
+#define RTC_EN (1 << 10)
+#define PWRBTN_EN (1 << 8)
+#define GBL_EN (1 << 5)
+#define TMROF_EN (1 << 0)
+
+#define SCI_EN (1 << 0)
+
+#define SUS_EN (1 << 13)
+
+/* Note: only used for ACPI bios init. Could be deleted when ACPI init
+   is integrated in Bochs BIOS */
+static PIIX4PMState *piix4_pm_state;
+
+static uint32_t get_pmtmr(PIIX4PMState *s)
+{
+    uint32_t d;
+    d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
+    return d & 0xffffff;
+}
+
+static int get_pmsts(PIIX4PMState *s)
+{
+    int64_t d;
+    int pmsts;
+    pmsts = s->pmsts;
+    d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
+    if (d >= s->tmr_overflow_time)
+        s->pmsts |= TMROF_EN;
+    return pmsts;
+}
+
+static void pm_update_sci(PIIX4PMState *s)
+{
+    int sci_level, pmsts;
+    int64_t expire_time;
+    
+    pmsts = get_pmsts(s);
+    sci_level = (((pmsts & s->pmen) & 
+                  (RTC_EN | PWRBTN_EN | GBL_EN | TMROF_EN)) != 0);
+    pci_set_irq(&s->dev, 0, sci_level);
+    /* schedule a timer interruption if needed */
+    if ((s->pmen & TMROF_EN) && !(pmsts & TMROF_EN)) {
+        expire_time = muldiv64(s->tmr_overflow_time, ticks_per_sec, PM_FREQ);
+        qemu_mod_timer(s->tmr_timer, expire_time);
+    } else {
+        qemu_del_timer(s->tmr_timer);
+    }
+}
+
+static void pm_tmr_timer(void *opaque)
+{
+    PIIX4PMState *s = opaque;
+    pm_update_sci(s);
+}
+
+static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
+{
+    PIIX4PMState *s = opaque;
+    addr &= 0x3f;
+    switch(addr) {
+    case 0x00:
+        {
+            int64_t d;
+            int pmsts;
+            pmsts = get_pmsts(s);
+            if (pmsts & val & TMROF_EN) {
+                /* if TMRSTS is reset, then compute the new overflow time */
+                d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
+                s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
+            }
+            s->pmsts &= ~val;
+            pm_update_sci(s);
+        }
+        break;
+    case 0x02:
+        s->pmen = val;
+        pm_update_sci(s);
+        break;
+    case 0x04:
+        {
+            int sus_typ;
+            s->pmcntrl = val & ~(SUS_EN);
+            if (val & SUS_EN) {
+                /* change suspend type */
+                sus_typ = (val >> 10) & 3;
+                switch(sus_typ) {
+                case 0: /* soft power off */
+                    qemu_system_shutdown_request();
+                    break;
+                default:
+                    break;
+                }
+            }
+        }
+        break;
+    default:
+        break;
+    }
+#ifdef DEBUG
+    printf("PM writew port=0x%04x val=0x%04x\n", addr, val);
+#endif
+}
+
+static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
+{
+    PIIX4PMState *s = opaque;
+    uint32_t val;
+
+    addr &= 0x3f;
+    switch(addr) {
+    case 0x00:
+        val = get_pmsts(s);
+        break;
+    case 0x02:
+        val = s->pmen;
+        break;
+    case 0x04:
+        val = s->pmcntrl;
+        break;
+    default:
+        val = 0;
+        break;
+    }
+#ifdef DEBUG
+    printf("PM readw port=0x%04x val=0x%04x\n", addr, val);
+#endif
+    return val;
+}
+
+static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
+{
+    //    PIIX4PMState *s = opaque;
+    addr &= 0x3f;
+#ifdef DEBUG
+    printf("PM writel port=0x%04x val=0x%08x\n", addr, val);
+#endif
+}
+
+static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
+{
+    PIIX4PMState *s = opaque;
+    uint32_t val;
+
+    addr &= 0x3f;
+    switch(addr) {
+    case 0x08:
+        val = get_pmtmr(s);
+        break;
+    default:
+        val = 0;
+        break;
+    }
+#ifdef DEBUG
+    printf("PM readl port=0x%04x val=0x%08x\n", addr, val);
+#endif
+    return val;
+}
+
+static void smi_cmd_writeb(void *opaque, uint32_t addr, uint32_t val)
+{
+    PIIX4PMState *s = opaque;
+#ifdef DEBUG
+    printf("SMI cmd val=0x%02x\n", val);
+#endif
+    switch(val) {
+    case 0xf0: /* ACPI disable */
+        s->pmcntrl &= ~SCI_EN;
+        break;
+    case 0xf1: /* ACPI enable */
+        s->pmcntrl |= SCI_EN;
+        break;
+    }
+}
+
+static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
+{
+#if defined(DEBUG)
+    printf("ACPI: DBG: 0x%08x\n", val);
+#endif
+}
+
+/* XXX: we still add it to the PIIX3 and we count on the fact that
+   OSes are smart enough to accept this strange configuration */
+void piix4_pm_init(PCIBus *bus)
+{
+    PIIX4PMState *s;
+    uint8_t *pci_conf;
+    uint32_t pm_io_base;
+
+    s = (PIIX4PMState *)pci_register_device(bus,
+                                         "PM", sizeof(PIIX4PMState),
+                                         ((PCIDevice *)piix3_state)->devfn + 3, 
+                                         NULL, NULL);
+    pci_conf = s->dev.config;
+    pci_conf[0x00] = 0x86;
+    pci_conf[0x01] = 0x80;
+    pci_conf[0x02] = 0x13;
+    pci_conf[0x03] = 0x70;
+    pci_conf[0x08] = 0x00; // revision number
+    pci_conf[0x09] = 0x00;
+    pci_conf[0x0a] = 0x80; // other bridge device
+    pci_conf[0x0b] = 0x06; // bridge device
+    pci_conf[0x0e] = 0x00; // header_type
+    pci_conf[0x3d] = 0x01; // interrupt pin 1
+    pci_conf[0x60] = 0x10; // release number
+    
+    pm_io_base = PM_IO_BASE;
+    pci_conf[0x40] = pm_io_base | 1;
+    pci_conf[0x41] = pm_io_base >> 8;
+    register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s);
+    register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s);
+    register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s);
+    register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s);
+    
+    register_ioport_write(SMI_CMD_IO_ADDR, 1, 1, smi_cmd_writeb, s);
+    register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
+
+    s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
+    piix4_pm_state = s;
+}
+
+/* ACPI tables */
+/* XXX: move them in the Bochs BIOS ? */
+
+/*************************************************/
+
+/* Table structure from Linux kernel (the ACPI tables are under the
+   BSD license) */
+
+#define ACPI_TABLE_HEADER_DEF   /* ACPI common table header */ \
+	uint8_t                            signature [4];          /* ACPI signature (4 ASCII characters) */\
+	uint32_t                             length;                 /* Length of table, in bytes, including header */\
+	uint8_t                              revision;               /* ACPI Specification minor version # */\
+	uint8_t                              checksum;               /* To make sum of entire table == 0 */\
+	uint8_t                            oem_id [6];             /* OEM identification */\
+	uint8_t                            oem_table_id [8];       /* OEM table identification */\
+	uint32_t                             oem_revision;           /* OEM revision number */\
+	uint8_t                            asl_compiler_id [4];    /* ASL compiler vendor ID */\
+	uint32_t                             asl_compiler_revision;  /* ASL compiler revision number */
+
+
+struct acpi_table_header         /* ACPI common table header */
+{
+	ACPI_TABLE_HEADER_DEF
+};
+
+struct rsdp_descriptor         /* Root System Descriptor Pointer */
+{
+	uint8_t                            signature [8];          /* ACPI signature, contains "RSD PTR " */
+	uint8_t                              checksum;               /* To make sum of struct == 0 */
+	uint8_t                            oem_id [6];             /* OEM identification */
+	uint8_t                              revision;               /* Must be 0 for 1.0, 2 for 2.0 */
+	uint32_t                             rsdt_physical_address;  /* 32-bit physical address of RSDT */
+	uint32_t                             length;                 /* XSDT Length in bytes including hdr */
+	uint64_t                             xsdt_physical_address;  /* 64-bit physical address of XSDT */
+	uint8_t                              extended_checksum;      /* Checksum of entire table */
+	uint8_t                            reserved [3];           /* Reserved field must be 0 */
+};
+
+/*
+ * ACPI 1.0 Root System Description Table (RSDT)
+ */
+struct rsdt_descriptor_rev1
+{
+	ACPI_TABLE_HEADER_DEF                           /* ACPI common table header */
+	uint32_t                             table_offset_entry [2]; /* Array of pointers to other */
+			 /* ACPI tables */
+};
+
+/*
+ * ACPI 1.0 Firmware ACPI Control Structure (FACS)
+ */
+struct facs_descriptor_rev1
+{
+	uint8_t                            signature[4];           /* ACPI Signature */
+	uint32_t                             length;                 /* Length of structure, in bytes */
+	uint32_t                             hardware_signature;     /* Hardware configuration signature */
+	uint32_t                             firmware_waking_vector; /* ACPI OS waking vector */
+	uint32_t                             global_lock;            /* Global Lock */
+	uint32_t                             S4bios_f        : 1;    /* Indicates if S4BIOS support is present */
+	uint32_t                             reserved1       : 31;   /* Must be 0 */
+	uint8_t                              resverved3 [40];        /* Reserved - must be zero */
+};
+
+
+/*
+ * ACPI 1.0 Fixed ACPI Description Table (FADT)
+ */
+struct fadt_descriptor_rev1
+{
+	ACPI_TABLE_HEADER_DEF                           /* ACPI common table header */
+	uint32_t                             firmware_ctrl;          /* Physical address of FACS */
+	uint32_t                             dsdt;                   /* Physical address of DSDT */
+	uint8_t                              model;                  /* System Interrupt Model */
+	uint8_t                              reserved1;              /* Reserved */
+	uint16_t                             sci_int;                /* System vector of SCI interrupt */
+	uint32_t                             smi_cmd;                /* Port address of SMI command port */
+	uint8_t                              acpi_enable;            /* Value to write to smi_cmd to enable ACPI */
+	uint8_t                              acpi_disable;           /* Value to write to smi_cmd to disable ACPI */
+	uint8_t                              S4bios_req;             /* Value to write to SMI CMD to enter S4BIOS state */
+	uint8_t                              reserved2;              /* Reserved - must be zero */
+	uint32_t                             pm1a_evt_blk;           /* Port address of Power Mgt 1a acpi_event Reg Blk */
+	uint32_t                             pm1b_evt_blk;           /* Port address of Power Mgt 1b acpi_event Reg Blk */
+	uint32_t                             pm1a_cnt_blk;           /* Port address of Power Mgt 1a Control Reg Blk */
+	uint32_t                             pm1b_cnt_blk;           /* Port address of Power Mgt 1b Control Reg Blk */
+	uint32_t                             pm2_cnt_blk;            /* Port address of Power Mgt 2 Control Reg Blk */
+	uint32_t                             pm_tmr_blk;             /* Port address of Power Mgt Timer Ctrl Reg Blk */
+	uint32_t                             gpe0_blk;               /* Port addr of General Purpose acpi_event 0 Reg Blk */
+	uint32_t                             gpe1_blk;               /* Port addr of General Purpose acpi_event 1 Reg Blk */
+	uint8_t                              pm1_evt_len;            /* Byte length of ports at pm1_x_evt_blk */
+	uint8_t                              pm1_cnt_len;            /* Byte length of ports at pm1_x_cnt_blk */
+	uint8_t                              pm2_cnt_len;            /* Byte Length of ports at pm2_cnt_blk */
+	uint8_t                              pm_tmr_len;              /* Byte Length of ports at pm_tm_blk */
+	uint8_t                              gpe0_blk_len;           /* Byte Length of ports at gpe0_blk */
+	uint8_t                              gpe1_blk_len;           /* Byte Length of ports at gpe1_blk */
+	uint8_t                              gpe1_base;              /* Offset in gpe model where gpe1 events start */
+	uint8_t                              reserved3;              /* Reserved */
+	uint16_t                             plvl2_lat;              /* Worst case HW latency to enter/exit C2 state */
+	uint16_t                             plvl3_lat;              /* Worst case HW latency to enter/exit C3 state */
+	uint16_t                             flush_size;             /* Size of area read to flush caches */
+	uint16_t                             flush_stride;           /* Stride used in flushing caches */
+	uint8_t                              duty_offset;            /* Bit location of duty cycle field in p_cnt reg */
+	uint8_t                              duty_width;             /* Bit width of duty cycle field in p_cnt reg */
+	uint8_t                              day_alrm;               /* Index to day-of-month alarm in RTC CMOS RAM */
+	uint8_t                              mon_alrm;               /* Index to month-of-year alarm in RTC CMOS RAM */
+	uint8_t                              century;                /* Index to century in RTC CMOS RAM */
+	uint8_t                              reserved4;              /* Reserved */
+	uint8_t                              reserved4a;             /* Reserved */
+	uint8_t                              reserved4b;             /* Reserved */
+#if 0
+	uint32_t                             wb_invd         : 1;    /* The wbinvd instruction works properly */
+	uint32_t                             wb_invd_flush   : 1;    /* The wbinvd flushes but does not invalidate */
+	uint32_t                             proc_c1         : 1;    /* All processors support C1 state */
+	uint32_t                             plvl2_up        : 1;    /* C2 state works on MP system */
+	uint32_t                             pwr_button      : 1;    /* Power button is handled as a generic feature */
+	uint32_t                             sleep_button    : 1;    /* Sleep button is handled as a generic feature, or not present */
+	uint32_t                             fixed_rTC       : 1;    /* RTC wakeup stat not in fixed register space */
+	uint32_t                             rtcs4           : 1;    /* RTC wakeup stat not possible from S4 */
+	uint32_t                             tmr_val_ext     : 1;    /* The tmr_val width is 32 bits (0 = 24 bits) */
+	uint32_t                             reserved5       : 23;   /* Reserved - must be zero */
+#else
+        uint32_t flags;
+#endif
+};
+
+/*
+ * MADT values and structures
+ */
+
+/* Values for MADT PCATCompat */
+
+#define DUAL_PIC                0
+#define MULTIPLE_APIC           1
+
+
+/* Master MADT */
+
+struct multiple_apic_table
+{
+	ACPI_TABLE_HEADER_DEF                           /* ACPI common table header */
+	uint32_t                             local_apic_address;     /* Physical address of local APIC */
+#if 0
+	uint32_t                             PCATcompat      : 1;    /* A one indicates system also has dual 8259s */
+	uint32_t                             reserved1       : 31;
+#else
+        uint32_t                             flags;
+#endif
+};
+
+
+/* Values for Type in APIC_HEADER_DEF */
+
+#define APIC_PROCESSOR          0
+#define APIC_IO                 1
+#define APIC_XRUPT_OVERRIDE     2
+#define APIC_NMI                3
+#define APIC_LOCAL_NMI          4
+#define APIC_ADDRESS_OVERRIDE   5
+#define APIC_IO_SAPIC           6
+#define APIC_LOCAL_SAPIC        7
+#define APIC_XRUPT_SOURCE       8
+#define APIC_RESERVED           9           /* 9 and greater are reserved */
+
+/*
+ * MADT sub-structures (Follow MULTIPLE_APIC_DESCRIPTION_TABLE)
+ */
+#define APIC_HEADER_DEF                     /* Common APIC sub-structure header */\
+	uint8_t                              type; \
+	uint8_t                              length;
+
+/* Sub-structures for MADT */
+
+struct madt_processor_apic
+{
+	APIC_HEADER_DEF
+	uint8_t                              processor_id;           /* ACPI processor id */
+	uint8_t                              local_apic_id;          /* Processor's local APIC id */
+#if 0
+	uint32_t                             processor_enabled: 1;   /* Processor is usable if set */
+	uint32_t                             reserved2       : 31;   /* Reserved, must be zero */
+#else
+        uint32_t flags;
+#endif
+};
+
+struct madt_io_apic
+{
+	APIC_HEADER_DEF
+	uint8_t                              io_apic_id;             /* I/O APIC ID */
+	uint8_t                              reserved;               /* Reserved - must be zero */
+	uint32_t                             address;                /* APIC physical address */
+	uint32_t                             interrupt;              /* Global system interrupt where INTI
+			  * lines start */
+};
+
+#include "acpi-dsdt.hex"
+
+static int acpi_checksum(const uint8_t *data, int len)
+{
+    int sum, i;
+    sum = 0;
+    for(i = 0; i < len; i++)
+        sum += data[i];
+    return (-sum) & 0xff;
+}
+
+static void acpi_build_table_header(struct acpi_table_header *h, 
+                                    char *sig, int len)
+{
+    memcpy(h->signature, sig, 4);
+    h->length = cpu_to_le32(len);
+    h->revision = 0;
+    memcpy(h->oem_id, "QEMU  ", 6);
+    memcpy(h->oem_table_id, "QEMU", 4);
+    memcpy(h->oem_table_id + 4, sig, 4);
+    h->oem_revision = cpu_to_le32(1);
+    memcpy(h->asl_compiler_id, "QEMU", 4);
+    h->asl_compiler_revision = cpu_to_le32(1);
+    h->checksum = acpi_checksum((void *)h, len);
+}
+
+#define ACPI_TABLES_BASE 0x000e8000
+
+/* base_addr must be a multiple of 4KB */
+void acpi_bios_init(void)
+{
+    struct rsdp_descriptor *rsdp;
+    struct rsdt_descriptor_rev1 *rsdt;
+    struct fadt_descriptor_rev1 *fadt;
+    struct facs_descriptor_rev1 *facs;
+    struct multiple_apic_table *madt;
+    uint8_t *dsdt;
+    uint32_t base_addr, rsdt_addr, fadt_addr, addr, facs_addr, dsdt_addr;
+    uint32_t pm_io_base, acpi_tables_size, madt_addr, madt_size;
+    int i;
+
+    /* compute PCI I/O addresses */
+    pm_io_base = (piix4_pm_state->dev.config[0x40] | 
+        (piix4_pm_state->dev.config[0x41] << 8)) & ~0x3f;
+    
+    base_addr = ACPI_TABLES_BASE;
+
+    /* reserve memory space for tables */
+    addr = base_addr;
+    rsdp = (void *)(phys_ram_base + addr);
+    addr += sizeof(*rsdp);
+
+    rsdt_addr = addr;
+    rsdt = (void *)(phys_ram_base + addr);
+    addr += sizeof(*rsdt);
+    
+    fadt_addr = addr;
+    fadt = (void *)(phys_ram_base + addr);
+    addr += sizeof(*fadt);
+
+    /* XXX: FACS should be in RAM */
+    addr = (addr + 63) & ~63; /* 64 byte alignment for FACS */
+    facs_addr = addr;
+    facs = (void *)(phys_ram_base + addr);
+    addr += sizeof(*facs);
+
+    dsdt_addr = addr;
+    dsdt = (void *)(phys_ram_base + addr);
+    addr += sizeof(AmlCode);
+    
+    madt_addr = addr;
+    madt_size = sizeof(*madt) + 
+        sizeof(struct madt_processor_apic) * smp_cpus +
+        sizeof(struct madt_io_apic);
+    madt = (void *)(phys_ram_base + addr);
+    addr += madt_size;
+
+    acpi_tables_size = addr - base_addr;
+
+    cpu_register_physical_memory(base_addr, acpi_tables_size, 
+                                 base_addr | IO_MEM_ROM);
+    
+    /* RSDP */
+    memset(rsdp, 0, sizeof(*rsdp));
+    memcpy(rsdp->signature, "RSD PTR ", 8);
+    memcpy(rsdp->oem_id, "QEMU  ", 6);
+    rsdp->rsdt_physical_address = cpu_to_le32(rsdt_addr);
+    rsdp->checksum = acpi_checksum((void *)rsdp, 20);
+    
+    /* RSDT */
+    rsdt->table_offset_entry[0] = cpu_to_le32(fadt_addr);
+    rsdt->table_offset_entry[1] = cpu_to_le32(madt_addr);
+    acpi_build_table_header((struct acpi_table_header *)rsdt, 
+                            "RSDT", sizeof(*rsdt));
+    
+    /* FADT */
+    memset(fadt, 0, sizeof(*fadt));
+    fadt->firmware_ctrl = cpu_to_le32(facs_addr);
+    fadt->dsdt = cpu_to_le32(dsdt_addr);
+    fadt->model = 1;
+    fadt->reserved1 = 0;
+    fadt->sci_int = cpu_to_le16(piix4_pm_state->dev.config[0x3c]);
+    fadt->smi_cmd = cpu_to_le32(SMI_CMD_IO_ADDR);
+    fadt->acpi_enable = 0xf1;
+    fadt->acpi_disable = 0xf0;
+    fadt->pm1a_evt_blk = cpu_to_le32(pm_io_base);
+    fadt->pm1a_cnt_blk = cpu_to_le32(pm_io_base + 0x04);
+    fadt->pm_tmr_blk = cpu_to_le32(pm_io_base + 0x08);
+    fadt->pm1_evt_len = 4;
+    fadt->pm1_cnt_len = 2;
+    fadt->pm_tmr_len = 4;
+    fadt->plvl2_lat = cpu_to_le16(50);
+    fadt->plvl3_lat = cpu_to_le16(50);
+    fadt->plvl3_lat = cpu_to_le16(50);
+    /* WBINVD + PROC_C1 + PWR_BUTTON + SLP_BUTTON + FIX_RTC */
+    fadt->flags = cpu_to_le32((1 << 0) | (1 << 2) | (1 << 4) | (1 << 5) | (1 << 6));
+    acpi_build_table_header((struct acpi_table_header *)fadt, "FACP", 
+                            sizeof(*fadt));
+
+    /* FACS */
+    memset(facs, 0, sizeof(*facs));
+    memcpy(facs->signature, "FACS", 4);
+    facs->length = cpu_to_le32(sizeof(*facs));
+
+    /* DSDT */
+    memcpy(dsdt, AmlCode, sizeof(AmlCode));
+
+    /* MADT */
+    {
+        struct madt_processor_apic *apic;
+        struct madt_io_apic *io_apic;
+
+        memset(madt, 0, madt_size);
+        madt->local_apic_address = cpu_to_le32(0xfee00000);
+        madt->flags = cpu_to_le32(1);
+        apic = (void *)(madt + 1);
+        for(i=0;i<smp_cpus;i++) {
+            apic->type = APIC_PROCESSOR;
+            apic->length = sizeof(*apic);
+            apic->processor_id = i;
+            apic->local_apic_id = i;
+            apic->flags = cpu_to_le32(1);
+            apic++;
+        }
+        io_apic = (void *)apic;
+        io_apic->type = APIC_IO;
+        io_apic->length = sizeof(*io_apic);
+        io_apic->io_apic_id = smp_cpus;
+        io_apic->address = cpu_to_le32(0xfec00000);
+        io_apic->interrupt = cpu_to_le32(0);
+
+        acpi_build_table_header((struct acpi_table_header *)madt, 
+                                "APIC", madt_size);
+    }
+}