/*      $NetBSD: acpi_stub.c,v 1.7 2012/12/27 20:21:51 martin Exp $     */

/*-
 * Copyright (c) 2003 Marcel Moolenaar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */




#include <sys/cdefs.h>
/* __FBSDID("$FreeBSD: src/sys/boot/ia64/libski/acpi_stub.c,v 1.3 2003/12/09 08:35:17 marcel Exp $"); */

#include <sys/types.h>
#include <sys/lock.h>
#include <lib/libkern/libkern.h>
#include <lib/libsa/loadfile.h>
#include <bootstrap.h>
#include <dev/acpi/acpica.h>

#define APIC_IO_SAPIC                   6
#define APIC_LOCAL_SAPIC                7

#pragma pack(1) /* XXX: Standardify me */

typedef struct  /* LOCAL SAPIC */
{
        ACPI_SUBTABLE_HEADER     Header;
        UINT8           ProcessorId;            /* ACPI processor id */
        UINT8           LocalSapicId;           /* Processor local SAPIC id */
        UINT8           LocalSapicEid;          /* Processor local SAPIC eid */
        UINT8           Reserved[3];
        UINT32          ProcessorEnabled: 1;
        UINT32          FlagsReserved: 31;
} LOCAL_SAPIC;

typedef struct  /* IO SAPIC */
{
        ACPI_SUBTABLE_HEADER    Header;
        UINT8                   IoSapicId;      /* I/O SAPIC ID */
        UINT8                   Reserved;       /* reserved - must be zero */
        UINT32                  Vector;         /* interrupt base */
        UINT64                  IoSapicAddress; /* SAPIC's physical address */
} IO_SAPIC;

/*
 */

struct {
        ACPI_TABLE_MADT         Header;
        ACPI_MADT_LOCAL_SAPIC   cpu0;
        ACPI_MADT_LOCAL_SAPIC   cpu1;
        ACPI_MADT_LOCAL_SAPIC   cpu2;
        ACPI_MADT_LOCAL_SAPIC   cpu3;
        ACPI_MADT_IO_SAPIC      sapic;
} apic = {
        /* Header. */
        {
                ACPI_SIG_MADT,                  /* Signature. */
                sizeof(apic),                   /* Length of table. */
                0,                              /* ACPI minor revision. */
                0,                              /* XXX checksum. */
                "FBSD",                         /* OEM Id. */
                "SKI",                          /* OEM table Id. */
                0,                              /* OEM revision. */
                "FBSD",                         /* ASL compiler Id. */
                0,                              /* ASL revision. */
                0xfee00000,
        },
        /* cpu0. */
        {
                APIC_LOCAL_SAPIC,               /* Type. */
                sizeof(apic.cpu0),              /* Length. */
                0,                              /* ACPI processor id */
                0,                              /* Processor local SAPIC id */
                0,                              /* Processor local SAPIC eid */
                { 0, 0, 0 },
                1,                              /* FL: Enabled. */
        },
        /* cpu1. */
        {
                APIC_LOCAL_SAPIC,               /* Type. */
                sizeof(apic.cpu1),              /* Length. */
                1,                              /* ACPI processor id */
                0,                              /* Processor local SAPIC id */
                1,                              /* Processor local SAPIC eid */
                { 0, 0, 0 },
                1,                              /* FL: Enabled. */
        },
        /* cpu2. */
        {
                APIC_LOCAL_SAPIC,               /* Type. */
                sizeof(apic.cpu2),              /* Length. */
                2,                              /* ACPI processor id */
                1,                              /* Processor local SAPIC id */
                0,                              /* Processor local SAPIC eid */
                { 0, 0, 0 },
                0,                              /* FL: Enabled. */
        },
        /* cpu3. */
        {
                APIC_LOCAL_SAPIC,               /* Type. */
                sizeof(apic.cpu3),              /* Length. */
                3,                              /* ACPI processor id */
                1,                              /* Processor local SAPIC id */
                1,                              /* Processor local SAPIC eid */
                { 0, 0, 0 },
                0,                              /* FL: Enabled. */
        },
        /* sapic. */
        {
                APIC_IO_SAPIC,                  /* Type. */
                sizeof(apic.sapic),             /* Length. */
                4,                              /* IO SAPIC id. */
                0,
                16,                             /* Interrupt base. */
                0xfec00000                      /* IO SAPIC address. */
        }
};

struct {
        ACPI_TABLE_HEADER       Header;
        UINT64                  apic_tbl;
} xsdt = {
        {
                ACPI_SIG_XSDT,          /* Signature. */
                sizeof(xsdt),           /* Length of table. */
                0,                      /* ACPI minor revision. */
                0,                      /* XXX checksum. */
                "FBSD",                 /* OEM Id. */
                "SKI",                  /* OEM table Id. */
                0,                      /* OEM revision. */
                "FBSD",                 /* ASL compiler Id. */
                0                       /* ASL revision. */
        },
        0UL                             /* XXX APIC table address. */
};

ACPI_TABLE_RSDP acpi_root = {
        ACPI_SIG_RSDP,
        0,                              /* XXX checksum. */
        "FBSD",
        2,                              /* ACPI Rev 2.0. */
        0UL,
        sizeof(xsdt),                   /* XSDT length. */
        0UL,                            /* XXX PA of XSDT. */
        0,                              /* XXX Extended checksum. */
};

#pragma pack() /* Reset Packing */

static void
cksum(void *addr, int sz, UINT8 *sum)
{
        UINT8 *p, s;

        p = addr;
        s = 0;
        while (sz--)
                s += *p++;
        *sum = -s;
}

void
acpi_stub_init(void)
{
        acpi_root.XsdtPhysicalAddress = (UINT64)&xsdt;
        cksum(&acpi_root, 20, &acpi_root.Checksum);
        cksum(&acpi_root, sizeof(acpi_root), &acpi_root.ExtendedChecksum);

        xsdt.apic_tbl = (UINT32)(uintptr_t)&apic;
        cksum(&xsdt, sizeof(xsdt), &xsdt.Header.Checksum);
}