i86pc/io/isa.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
 * Copyright (c) 2012 Gary Mills
 * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 *  ISA bus nexus driver
 */

#include <sys/types.h>
#include <sys/cmn_err.h>
#include <sys/conf.h>
#include <sys/modctl.h>
#include <sys/autoconf.h>
#include <sys/errno.h>
#include <sys/debug.h>
#include <sys/kmem.h>
#include <sys/psm.h>
#include <sys/ddidmareq.h>
#include <sys/ddi_impldefs.h>
#include <sys/ddi_subrdefs.h>
#include <sys/dma_engine.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#include <sys/acpi/acpi_enum.h>
#include <sys/mach_intr.h>
#include <sys/pci.h>
#include <sys/note.h>
#include <sys/boot_console.h>
#include <sys/apic.h>
#if defined(__xpv)
#include <sys/hypervisor.h>
#include <sys/evtchn_impl.h>

extern int console_hypervisor_dev_type(int *);
#endif


extern int pseudo_isa;
extern int isa_resource_setup(void);
extern int (*psm_intr_ops)(dev_info_t *, ddi_intr_handle_impl_t *,
    psm_intr_op_t, int *);
extern void pci_register_isa_resources(int, uint32_t, uint32_t);
static void isa_enumerate(int);
static void enumerate_BIOS_serial(dev_info_t *);
static void adjust_prtsz(dev_info_t *isa_dip);
static void isa_create_ranges_prop(dev_info_t *);

#define USED_RESOURCES  "used-resources"

/*
 * The following typedef is used to represent an entry in the "ranges"
 * property of a pci-isa bridge device node.
 */
typedef struct {
    uint32_t child_high;
    uint32_t child_low;
    uint32_t parent_high;
    uint32_t parent_mid;
    uint32_t parent_low;
    uint32_t size;
} pib_ranges_t;

typedef struct {
    uint32_t base;
    uint32_t len;
} used_ranges_t;

#define USED_CELL_SIZE  2   /* 1 byte addr, 1 byte size */
#define ISA_ADDR_IO 1   /* IO address space */
#define ISA_ADDR_MEM    0   /* memory adress space */

/*
 * #define ISA_DEBUG 1
 */

#define num_BIOS_serial 4   /* number of BIOS serial ports to look at */
#define min_BIOS_serial 2   /* minimum number of BIOS serial ports */
#define COM_ISR     2   /* 16550 intr status register */
#define COM_SCR     7   /* 16550 scratch register */

/*
 * For serial ports not enumerated by ACPI, and parallel ports with
 * illegal size. Typically, a system can have as many as 4 serial
 * ports and 3 parallel ports.
 */
#define MAX_EXTRA_RESOURCE  7
static struct regspec isa_extra_resource[MAX_EXTRA_RESOURCE];
static int isa_extra_count = 0;

/* Register definitions for COM1 to COM4. */
static struct regspec asy_regs[] = {
    {1, 0x3f8, 0x8},
    {1, 0x2f8, 0x8},
    {1, 0x3e8, 0x8},
    {1, 0x2e8, 0x8}
};

/* Serial port interrupt vectors for COM1 to COM4. */
static int asy_intrs[] = {0x4, 0x3, 0x4, 0x3};
/* Bitfield indicating which interrupts are overridden by eeprom config */
static uchar_t asy_intr_override = 0;

/*
 *      Local data
 */

static ddi_dma_attr_t ISA_dma_attr = {
    DMA_ATTR_V0,
    (unsigned long long)0,
    (unsigned long long)0x00ffffff,
    0x0000ffff,
    1,
    1,
    1,
    (unsigned long long)0xffffffff,
    (unsigned long long)0x0000ffff,
    1,
    1,
    0
};


/*
 * Config information
 */

static int
isa_bus_map(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp,
    off_t offset, off_t len, caddr_t *vaddrp);

static int
isa_dma_allochdl(dev_info_t *, dev_info_t *, ddi_dma_attr_t *,
    int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *);

static int
isa_dma_mctl(dev_info_t *, dev_info_t *, ddi_dma_handle_t, enum ddi_dma_ctlops,
    off_t *, size_t *, caddr_t *, uint_t);

static int
isa_ctlops(dev_info_t *, dev_info_t *, ddi_ctl_enum_t, void *, void *);

static int
isa_intr_ops(dev_info_t *pdip, dev_info_t *rdip, ddi_intr_op_t intr_op,
    ddi_intr_handle_impl_t *hdlp, void *result);
static int isa_alloc_intr_fixed(dev_info_t *, ddi_intr_handle_impl_t *, void *);
static int isa_free_intr_fixed(dev_info_t *, ddi_intr_handle_impl_t *);

struct bus_ops isa_bus_ops = {
    BUSO_REV,
    isa_bus_map,
    NULL,
    NULL,
    NULL,
    i_ddi_map_fault,
    NULL,
    isa_dma_allochdl,
    ddi_dma_freehdl,
    ddi_dma_bindhdl,
    ddi_dma_unbindhdl,
    ddi_dma_flush,
    ddi_dma_win,
    isa_dma_mctl,
    isa_ctlops,
    ddi_bus_prop_op,
    NULL,       /* (*bus_get_eventcookie)();    */
    NULL,       /* (*bus_add_eventcall)();  */
    NULL,       /* (*bus_remove_eventcall)();   */
    NULL,       /* (*bus_post_event)();     */
    NULL,       /* (*bus_intr_ctl)(); */
    NULL,       /* (*bus_config)(); */
    NULL,       /* (*bus_unconfig)(); */
    NULL,       /* (*bus_fm_init)(); */
    NULL,       /* (*bus_fm_fini)(); */
    NULL,       /* (*bus_fm_access_enter)(); */
    NULL,       /* (*bus_fm_access_exit)(); */
    NULL,       /* (*bus_power)(); */
    isa_intr_ops    /* (*bus_intr_op)(); */
};


static int isa_attach(dev_info_t *devi, ddi_attach_cmd_t cmd);

/*
 * Internal isa ctlops support routines
 */
static int isa_initchild(dev_info_t *child);

struct dev_ops isa_ops = {
    DEVO_REV,       /* devo_rev, */
    0,          /* refcnt  */
    ddi_no_info,        /* info */
    nulldev,        /* identify */
    nulldev,        /* probe */
    isa_attach,     /* attach */
    nulldev,        /* detach */
    nodev,          /* reset */
    (struct cb_ops *)0, /* driver operations */
    &isa_bus_ops,       /* bus operations */
    NULL,           /* power */
    ddi_quiesce_not_needed,     /* quiesce */
};

/*
 * Module linkage information for the kernel.
 */

static struct modldrv modldrv = {
    &mod_driverops, /* Type of module.  This is ISA bus driver */
    "isa nexus driver for 'ISA'",
    &isa_ops,   /* driver ops */
};

static struct modlinkage modlinkage = {
    MODREV_1,
    &modldrv,
    NULL
};

int
_init(void)
{
    int err;
    char tty_irq_param[9] = "ttyX-irq";
    char *tty_irq;
    int i;

    if ((err = mod_install(&modlinkage)) != 0)
        return (err);

    /* Check if any tty irqs are overridden by eeprom config */
    for (i = 0; i < num_BIOS_serial; i++) {
        tty_irq_param[3] = 'a' + i;
        if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
            DDI_PROP_DONTPASS, tty_irq_param, &tty_irq)
            == DDI_PROP_SUCCESS) {
            long data;

            if (ddi_strtol(tty_irq, NULL, 0, &data) == 0) {
                asy_intrs[i] = (int)data;
                asy_intr_override |= 1<<i;
            }

            ddi_prop_free(tty_irq);
        }
    }

    impl_bus_add_probe(isa_enumerate);
    return (0);
}

int
_fini(void)
{
    int err;

    impl_bus_delete_probe(isa_enumerate);

    if ((err = mod_remove(&modlinkage)) != 0)
        return (err);

    return (0);
}

int
_info(struct modinfo *modinfop)
{
    return (mod_info(&modlinkage, modinfop));
}

static int
isa_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
{
    int rval;

#if defined(__xpv)
    /*
     * don't allow isa to attach in domU. this can happen if someone sets
     * the console wrong, etc. ISA devices assume the H/W is there and
     * will cause the domU to panic.
     */
    if (!DOMAIN_IS_INITDOMAIN(xen_info)) {
        return (DDI_FAILURE);
    }
#endif

    switch (cmd) {
    case DDI_ATTACH:
        break;
    case DDI_RESUME:
        return (DDI_SUCCESS);
    default:
        return (DDI_FAILURE);
    }

    if ((rval = i_dmae_init(devi)) == DDI_SUCCESS)
        ddi_report_dev(devi);

    return (rval);
}

#define SET_RNGS(rng_p, used_p, ctyp, ptyp) do {            \
        (rng_p)->child_high = (ctyp);               \
        (rng_p)->child_low = (rng_p)->parent_low = (used_p)->base; \
        (rng_p)->parent_high = (ptyp);              \
        (rng_p)->parent_mid = 0;                \
        (rng_p)->size = (used_p)->len;              \
        _NOTE(CONSTCOND) } while (0)
static uint_t
isa_used_to_ranges(int ctype, int *array, uint_t size, pib_ranges_t *ranges)
{
    used_ranges_t *used_p;
    pib_ranges_t *rng_p = ranges;
    uint_t  i, ptype;

    ptype = (ctype == ISA_ADDR_IO) ? PCI_ADDR_IO : PCI_ADDR_MEM32;
    ptype |= PCI_REG_REL_M;
    size /= USED_CELL_SIZE;
    used_p = (used_ranges_t *)array;
    SET_RNGS(rng_p, used_p, ctype, ptype);
    for (i = 1, used_p++; i < size; i++, used_p++) {
        /* merge ranges record if applicable */
        if (rng_p->child_low + rng_p->size == used_p->base)
            rng_p->size += used_p->len;
        else {
            rng_p++;
            SET_RNGS(rng_p, used_p, ctype, ptype);
        }
    }
    return (rng_p - ranges + 1);
}

void
isa_remove_res_from_pci(int type, int *array, uint_t size)
{
    int i;
    used_ranges_t *used_p;

    size /= USED_CELL_SIZE;
    used_p = (used_ranges_t *)array;
    for (i = 0; i < size; i++, used_p++)
        pci_register_isa_resources(type, used_p->base, used_p->len);
}

static void
isa_create_ranges_prop(dev_info_t *dip)
{
    dev_info_t *used;
    int *ioarray, *memarray, status;
    uint_t nio = 0, nmem = 0, nrng = 0, n;
    pib_ranges_t *ranges;

    used = ddi_find_devinfo(USED_RESOURCES, -1, 0);
    if (used == NULL) {
        cmn_err(CE_WARN, "Failed to find used-resources <%s>\n",
            ddi_get_name(dip));
        return;
    }
    status = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, used,
        DDI_PROP_DONTPASS, "io-space", &ioarray, &nio);
    if (status != DDI_PROP_SUCCESS && status != DDI_PROP_NOT_FOUND) {
        cmn_err(CE_WARN, "io-space property failure for %s (%x)\n",
            ddi_get_name(used), status);
        return;
    }
    status = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, used,
        DDI_PROP_DONTPASS, "device-memory", &memarray, &nmem);
    if (status != DDI_PROP_SUCCESS && status != DDI_PROP_NOT_FOUND) {
        cmn_err(CE_WARN, "device-memory property failure for %s (%x)\n",
            ddi_get_name(used), status);
        return;
    }
    n = (nio + nmem) / USED_CELL_SIZE;
    ranges =  (pib_ranges_t *)kmem_zalloc(sizeof (pib_ranges_t) * n,
        KM_SLEEP);

    if (nio != 0) {
        nrng = isa_used_to_ranges(ISA_ADDR_IO, ioarray, nio, ranges);
        isa_remove_res_from_pci(ISA_ADDR_IO, ioarray, nio);
        ddi_prop_free(ioarray);
    }
    if (nmem != 0) {
        nrng += isa_used_to_ranges(ISA_ADDR_MEM, memarray, nmem,
            ranges + nrng);
        isa_remove_res_from_pci(ISA_ADDR_MEM, memarray, nmem);
        ddi_prop_free(memarray);
    }

    if (!pseudo_isa)
        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, dip, "ranges",
            (int *)ranges, nrng * sizeof (pib_ranges_t) / sizeof (int));
    kmem_free(ranges, sizeof (pib_ranges_t) * n);
}

/*ARGSUSED*/
static int
isa_apply_range(dev_info_t *dip, struct regspec *isa_reg_p,
    pci_regspec_t *pci_reg_p)
{
    pib_ranges_t *ranges, *rng_p;
    int len, i, offset, nrange;

    if (ddi_getlongprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
        "ranges", (caddr_t)&ranges, &len) != DDI_SUCCESS) {
        cmn_err(CE_WARN, "Can't get %s ranges property",
            ddi_get_name(dip));
        return (DDI_ME_REGSPEC_RANGE);
    }
    nrange = len / sizeof (pib_ranges_t);
    rng_p = ranges;
    for (i = 0; i < nrange; i++, rng_p++) {
        /* Check for correct space */
        if (isa_reg_p->regspec_bustype != rng_p->child_high)
            continue;

        /* Detect whether request entirely fits within a range */
        if (isa_reg_p->regspec_addr < rng_p->child_low)
            continue;
        if ((isa_reg_p->regspec_addr + isa_reg_p->regspec_size - 1) >
            (rng_p->child_low + rng_p->size - 1))
            continue;

        offset = isa_reg_p->regspec_addr - rng_p->child_low;

        pci_reg_p->pci_phys_hi = rng_p->parent_high;
        pci_reg_p->pci_phys_mid = 0;
        pci_reg_p->pci_phys_low = rng_p->parent_low + offset;
        pci_reg_p->pci_size_hi = 0;
        pci_reg_p->pci_size_low = isa_reg_p->regspec_size;

        break;
    }
    kmem_free(ranges, len);

    if (i < nrange)
        return (DDI_SUCCESS);

    /*
     * Check extra resource range specially for serial and parallel
     * devices, which are treated differently from all other ISA
     * devices. On some machines, serial ports are not enumerated
     * by ACPI but by BIOS, with io base addresses noted in legacy
     * BIOS data area. Parallel port on some machines comes with
     * illegal size.
     */
    if (isa_reg_p->regspec_bustype != ISA_ADDR_IO) {
        cmn_err(CE_WARN, "Bus type not ISA I/O\n");
        return (DDI_ME_REGSPEC_RANGE);
    }

    for (i = 0; i < isa_extra_count; i++) {
        struct regspec *reg_p = &isa_extra_resource[i];

        if (isa_reg_p->regspec_addr < reg_p->regspec_addr)
            continue;
        if ((isa_reg_p->regspec_addr + isa_reg_p->regspec_size) >
            (reg_p->regspec_addr + reg_p->regspec_size))
            continue;

        pci_reg_p->pci_phys_hi = PCI_ADDR_IO | PCI_REG_REL_M;
        pci_reg_p->pci_phys_mid = 0;
        pci_reg_p->pci_phys_low = isa_reg_p->regspec_addr;
        pci_reg_p->pci_size_hi = 0;
        pci_reg_p->pci_size_low = isa_reg_p->regspec_size;
        break;
    }
    if (i < isa_extra_count)
        return (DDI_SUCCESS);

    cmn_err(CE_WARN, "isa_apply_range: Out of range base <0x%x>, size <%d>",
        isa_reg_p->regspec_addr, isa_reg_p->regspec_size);
    return (DDI_ME_REGSPEC_RANGE);
}

static int
isa_bus_map(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp,
    off_t offset, off_t len, caddr_t *vaddrp)
{
    struct regspec tmp_reg, *rp;
    pci_regspec_t vreg;
    ddi_map_req_t mr = *mp;     /* Get private copy of request */
    int error;

    if (pseudo_isa)
        return (i_ddi_bus_map(dip, rdip, mp, offset, len, vaddrp));

    mp = &mr;

    /*
     * First, if given an rnumber, convert it to a regspec...
     */
    if (mp->map_type == DDI_MT_RNUMBER)  {

        int rnumber = mp->map_obj.rnumber;

        rp = i_ddi_rnumber_to_regspec(rdip, rnumber);
        if (rp == (struct regspec *)0)
            return (DDI_ME_RNUMBER_RANGE);

        /*
         * Convert the given ddi_map_req_t from rnumber to regspec...
         */
        mp->map_type = DDI_MT_REGSPEC;
        mp->map_obj.rp = rp;
    }

    /*
     * Adjust offset and length correspnding to called values...
     * XXX: A non-zero length means override the one in the regspec.
     * XXX: (Regardless of what's in the parent's range)
     */

    tmp_reg = *(mp->map_obj.rp);        /* Preserve underlying data */
    rp = mp->map_obj.rp = &tmp_reg;     /* Use tmp_reg in request */

    rp->regspec_addr += (uint_t)offset;
    if (len != 0)
        rp->regspec_size = (uint_t)len;

    if ((error = isa_apply_range(dip, rp, &vreg)) != 0)
        return (error);
    mp->map_obj.rp = (struct regspec *)&vreg;

    /*
     * Call my parents bus_map function with modified values...
     */

    return (ddi_map(dip, mp, (off_t)0, (off_t)0, vaddrp));
}

static int
isa_dma_allochdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_attr_t *dma_attr,
    int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep)
{
    ddi_dma_attr_merge(dma_attr, &ISA_dma_attr);
    return (ddi_dma_allochdl(dip, rdip, dma_attr, waitfp, arg, handlep));
}

static int
isa_dma_mctl(dev_info_t *dip, dev_info_t *rdip,
    ddi_dma_handle_t handle, enum ddi_dma_ctlops request,
    off_t *offp, size_t *lenp, caddr_t *objp, uint_t flags)
{
    int rval;
    int arg = (int)(uintptr_t)objp;

    switch (request) {

    case DDI_DMA_E_PROG:
        return (i_dmae_prog(rdip, (struct ddi_dmae_req *)offp,
            (ddi_dma_cookie_t *)lenp, arg));

    case DDI_DMA_E_ACQUIRE:
        return (i_dmae_acquire(rdip, arg, (int(*)(caddr_t))offp,
            (caddr_t)lenp));

    case DDI_DMA_E_FREE:
        return (i_dmae_free(rdip, arg));

    case DDI_DMA_E_STOP:
        i_dmae_stop(rdip, arg);
        return (DDI_SUCCESS);

    case DDI_DMA_E_ENABLE:
        i_dmae_enable(rdip, arg);
        return (DDI_SUCCESS);

    case DDI_DMA_E_DISABLE:
        i_dmae_disable(rdip, arg);
        return (DDI_SUCCESS);

    case DDI_DMA_E_GETCNT:
        i_dmae_get_chan_stat(rdip, arg, NULL, (int *)lenp);
        return (DDI_SUCCESS);

    case DDI_DMA_E_SWSETUP:
        return (i_dmae_swsetup(rdip, (struct ddi_dmae_req *)offp,
            (ddi_dma_cookie_t *)lenp, arg));

    case DDI_DMA_E_SWSTART:
        i_dmae_swstart(rdip, arg);
        return (DDI_SUCCESS);

    case DDI_DMA_E_GETATTR:
        bcopy(&ISA_dma_attr, objp, sizeof (ddi_dma_attr_t));
        return (DDI_SUCCESS);

    case DDI_DMA_E_1STPTY:
        {
            struct ddi_dmae_req req1stpty =
                { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
            if (arg == 0) {
                req1stpty.der_command = DMAE_CMD_TRAN;
                req1stpty.der_trans = DMAE_TRANS_DMND;
            } else {
                req1stpty.der_trans = DMAE_TRANS_CSCD;
            }
            return (i_dmae_prog(rdip, &req1stpty, NULL, arg));
        }

    default:
        /*
         * We pass to rootnex, but it turns out that rootnex will just
         * return failure, as we don't use ddi_dma_mctl() except
         * for DMA engine (ISA) and DVMA (SPARC).  Arguably we could
         * just return an error direclty here, instead.
         */
        rval = ddi_dma_mctl(dip, rdip, handle, request, offp,
            lenp, objp, flags);
    }
    return (rval);
}

/*
 * Check if driver should be treated as an old pre 2.6 driver
 */
static int
old_driver(dev_info_t *dip)
{
    extern int ignore_hardware_nodes;   /* force flag from ddi_impl.c */

    if (ndi_dev_is_persistent_node(dip)) {
        if (ignore_hardware_nodes)
            return (1);
        if (ddi_getprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
            "ignore-hardware-nodes", -1) != -1)
            return (1);
    }
    return (0);
}

typedef struct {
    uint32_t phys_hi;
    uint32_t phys_lo;
    uint32_t size;
} isa_regs_t;

/*
 * Return non-zero if device in tree is a PnP isa device
 */
static int
is_pnpisa(dev_info_t *dip)
{
    isa_regs_t *isa_regs;
    int proplen, pnpisa;

    if (ddi_getlongprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "reg",
        (caddr_t)&isa_regs, &proplen) != DDI_PROP_SUCCESS) {
        return (0);
    }
    pnpisa = isa_regs[0].phys_hi & 0x80000000;
    /*
     * free the memory allocated by ddi_getlongprop().
     */
    kmem_free(isa_regs, proplen);
    if (pnpisa)
        return (1);
    else
        return (0);
}

/*ARGSUSED*/
static int
isa_ctlops(dev_info_t *dip, dev_info_t *rdip,
    ddi_ctl_enum_t ctlop, void *arg, void *result)
{
    int rn;
    struct ddi_parent_private_data *pdp;

    switch (ctlop) {
    case DDI_CTLOPS_REPORTDEV:
        if (rdip == (dev_info_t *)0)
            return (DDI_FAILURE);
        cmn_err(CE_CONT, "?ISA-device: %s%d\n",
            ddi_driver_name(rdip), ddi_get_instance(rdip));
        return (DDI_SUCCESS);

    case DDI_CTLOPS_INITCHILD:
        /*
         * older drivers aren't expecting the "standard" device
         * node format used by the hardware nodes.  these drivers
         * only expect their own properties set in their driver.conf
         * files.  so they tell us not to call them with hardware
         * nodes by setting the property "ignore-hardware-nodes".
         */
        if (old_driver((dev_info_t *)arg)) {
            return (DDI_NOT_WELL_FORMED);
        }

        return (isa_initchild((dev_info_t *)arg));

    case DDI_CTLOPS_UNINITCHILD:
        impl_ddi_sunbus_removechild((dev_info_t *)arg);
        return (DDI_SUCCESS);

    case DDI_CTLOPS_SIDDEV:
        if (ndi_dev_is_persistent_node(rdip))
            return (DDI_SUCCESS);
        /*
         * All ISA devices need to do confirming probes
         * unless they are PnP ISA.
         */
        if (is_pnpisa(rdip))
            return (DDI_SUCCESS);
        else
            return (DDI_FAILURE);

    case DDI_CTLOPS_REGSIZE:
    case DDI_CTLOPS_NREGS:
        if (rdip == (dev_info_t *)0)
            return (DDI_FAILURE);

        if ((pdp = ddi_get_parent_data(rdip)) == NULL)
            return (DDI_FAILURE);

        if (ctlop == DDI_CTLOPS_NREGS) {
            *(int *)result = pdp->par_nreg;
        } else {
            rn = *(int *)arg;
            if (rn >= pdp->par_nreg)
                return (DDI_FAILURE);
            *(off_t *)result = (off_t)pdp->par_reg[rn].regspec_size;
        }
        return (DDI_SUCCESS);

    case DDI_CTLOPS_ATTACH:
    case DDI_CTLOPS_DETACH:
    case DDI_CTLOPS_PEEK:
    case DDI_CTLOPS_POKE:
        return (DDI_FAILURE);

    default:
        return (ddi_ctlops(dip, rdip, ctlop, arg, result));
    }
}

static struct intrspec *
isa_get_ispec(dev_info_t *rdip, int inum)
{
    struct ddi_parent_private_data *pdp = ddi_get_parent_data(rdip);

    /* Validate the interrupt number */
    if (inum >= pdp->par_nintr)
        return (NULL);

    /* Get the interrupt structure pointer and return that */
    return ((struct intrspec *)&pdp->par_intr[inum]);
}

static int
isa_intr_ops(dev_info_t *pdip, dev_info_t *rdip, ddi_intr_op_t intr_op,
    ddi_intr_handle_impl_t *hdlp, void *result)
{
    struct intrspec *ispec;
#if defined(__xpv)
    int cons, ttyn;

    cons = console_hypervisor_dev_type(&ttyn);
#endif
    if (pseudo_isa)
        return (i_ddi_intr_ops(pdip, rdip, intr_op, hdlp, result));


    /* Process the interrupt operation */
    switch (intr_op) {
    case DDI_INTROP_GETCAP:
        /* First check with pcplusmp */
        if (psm_intr_ops == NULL)
            return (DDI_FAILURE);

        if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_GET_CAP, result)) {
            *(int *)result = 0;
            return (DDI_FAILURE);
        }
        break;
    case DDI_INTROP_SETCAP:
        if (psm_intr_ops == NULL)
            return (DDI_FAILURE);

        if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_SET_CAP, result))
            return (DDI_FAILURE);
        break;
    case DDI_INTROP_ALLOC:
        ASSERT(hdlp->ih_type == DDI_INTR_TYPE_FIXED);
        return (isa_alloc_intr_fixed(rdip, hdlp, result));
    case DDI_INTROP_FREE:
        ASSERT(hdlp->ih_type == DDI_INTR_TYPE_FIXED);
        return (isa_free_intr_fixed(rdip, hdlp));
    case DDI_INTROP_GETPRI:
        if ((ispec = isa_get_ispec(rdip, hdlp->ih_inum)) == NULL)
            return (DDI_FAILURE);
        *(int *)result = ispec->intrspec_pri;
        break;
    case DDI_INTROP_SETPRI:
        /* Validate the interrupt priority passed to us */
        if (*(int *)result > LOCK_LEVEL)
            return (DDI_FAILURE);

        /* Ensure that PSM is all initialized and ispec is ok */
        if ((psm_intr_ops == NULL) ||
            ((ispec = isa_get_ispec(rdip, hdlp->ih_inum)) == NULL))
            return (DDI_FAILURE);

        /* update the ispec with the new priority */
        ispec->intrspec_pri =  *(int *)result;
        break;
    case DDI_INTROP_ADDISR:
        if ((ispec = isa_get_ispec(rdip, hdlp->ih_inum)) == NULL)
            return (DDI_FAILURE);
        ispec->intrspec_func = hdlp->ih_cb_func;
        break;
    case DDI_INTROP_REMISR:
        if (hdlp->ih_type != DDI_INTR_TYPE_FIXED)
            return (DDI_FAILURE);
        if ((ispec = isa_get_ispec(rdip, hdlp->ih_inum)) == NULL)
            return (DDI_FAILURE);
        ispec->intrspec_func = (uint_t (*)()) 0;
        break;
    case DDI_INTROP_ENABLE:
        if ((ispec = isa_get_ispec(rdip, hdlp->ih_inum)) == NULL)
            return (DDI_FAILURE);

        /* Call psmi to translate irq with the dip */
        if (psm_intr_ops == NULL)
            return (DDI_FAILURE);

#if defined(__xpv)
        /*
         * if the hypervisor is using an isa serial port for the
         * console, make sure we don't try to use that interrupt as
         * it will cause us to panic when xen_bind_pirq() fails.
         */
        if (cons == CONS_TTY && ispec->intrspec_vec == asy_intrs[ttyn])
            return (DDI_FAILURE);
#endif
        ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec;
        if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_XLATE_VECTOR,
            (int *)&hdlp->ih_vector) == PSM_FAILURE)
            return (DDI_FAILURE);

        /* Add the interrupt handler */
        if (!add_avintr((void *)hdlp, ispec->intrspec_pri,
            hdlp->ih_cb_func, DEVI(rdip)->devi_name, hdlp->ih_vector,
            hdlp->ih_cb_arg1, hdlp->ih_cb_arg2, NULL, rdip))
            return (DDI_FAILURE);
        break;
    case DDI_INTROP_DISABLE:
        if ((ispec = isa_get_ispec(rdip, hdlp->ih_inum)) == NULL)
            return (DDI_FAILURE);

        /* Call psm_ops() to translate irq with the dip */
        if (psm_intr_ops == NULL)
            return (DDI_FAILURE);

        ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec;
        (void) (*psm_intr_ops)(rdip, hdlp,
            PSM_INTR_OP_XLATE_VECTOR, (int *)&hdlp->ih_vector);

        /* Remove the interrupt handler */
        rem_avintr((void *)hdlp, ispec->intrspec_pri,
            hdlp->ih_cb_func, hdlp->ih_vector);
        break;
    case DDI_INTROP_SETMASK:
        if (psm_intr_ops == NULL)
            return (DDI_FAILURE);

        if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_SET_MASK, NULL))
            return (DDI_FAILURE);
        break;
    case DDI_INTROP_CLRMASK:
        if (psm_intr_ops == NULL)
            return (DDI_FAILURE);

        if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_CLEAR_MASK, NULL))
            return (DDI_FAILURE);
        break;
    case DDI_INTROP_GETPENDING:
        if (psm_intr_ops == NULL)
            return (DDI_FAILURE);

        if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_GET_PENDING,
            result)) {
            *(int *)result = 0;
            return (DDI_FAILURE);
        }
        break;
    case DDI_INTROP_NAVAIL:
    case DDI_INTROP_NINTRS:
        *(int *)result = i_ddi_get_intx_nintrs(rdip);
        if (*(int *)result == 0) {
            return (DDI_FAILURE);
        }
        break;
    case DDI_INTROP_SUPPORTED_TYPES:
        *(int *)result = DDI_INTR_TYPE_FIXED;   /* Always ... */
        break;
    default:
        return (DDI_FAILURE);
    }

    return (DDI_SUCCESS);
}

/*
 * Allocate interrupt vector for FIXED (legacy) type.
 */
static int
isa_alloc_intr_fixed(dev_info_t *rdip, ddi_intr_handle_impl_t *hdlp,
    void *result)
{
    struct intrspec     *ispec;
    ddi_intr_handle_impl_t  info_hdl;
    int         ret;
    int         free_phdl = 0;
    apic_get_type_t     type_info;

    if (psm_intr_ops == NULL)
        return (DDI_FAILURE);

    if ((ispec = isa_get_ispec(rdip, hdlp->ih_inum)) == NULL)
        return (DDI_FAILURE);

    /*
     * If the PSM module is "APIX" then pass the request for it
     * to allocate the vector now.
     */
    bzero(&info_hdl, sizeof (ddi_intr_handle_impl_t));
    info_hdl.ih_private = &type_info;
    if ((*psm_intr_ops)(NULL, &info_hdl, PSM_INTR_OP_APIC_TYPE, NULL) ==
        PSM_SUCCESS && strcmp(type_info.avgi_type, APIC_APIX_NAME) == 0) {
        if (hdlp->ih_private == NULL) { /* allocate phdl structure */
            free_phdl = 1;
            i_ddi_alloc_intr_phdl(hdlp);
        }
        ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec;
        ret = (*psm_intr_ops)(rdip, hdlp,
            PSM_INTR_OP_ALLOC_VECTORS, result);
        if (free_phdl) { /* free up the phdl structure */
            free_phdl = 0;
            i_ddi_free_intr_phdl(hdlp);
            hdlp->ih_private = NULL;
        }
    } else {
        /*
         * No APIX module; fall back to the old scheme where the
         * interrupt vector is allocated during ddi_enable_intr() call.
         */
        hdlp->ih_pri = ispec->intrspec_pri;
        *(int *)result = hdlp->ih_scratch1;
        ret = DDI_SUCCESS;
    }

    return (ret);
}

/*
 * Free up interrupt vector for FIXED (legacy) type.
 */
static int
isa_free_intr_fixed(dev_info_t *rdip, ddi_intr_handle_impl_t *hdlp)
{
    struct intrspec         *ispec;
    ddi_intr_handle_impl_t      info_hdl;
    int             ret;
    apic_get_type_t         type_info;

    if (psm_intr_ops == NULL)
        return (DDI_FAILURE);

    /*
     * If the PSM module is "APIX" then pass the request for it
     * to free up the vector now.
     */
    bzero(&info_hdl, sizeof (ddi_intr_handle_impl_t));
    info_hdl.ih_private = &type_info;
    if ((*psm_intr_ops)(NULL, &info_hdl, PSM_INTR_OP_APIC_TYPE, NULL) ==
        PSM_SUCCESS && strcmp(type_info.avgi_type, APIC_APIX_NAME) == 0) {
        if ((ispec = isa_get_ispec(rdip, hdlp->ih_inum)) == NULL)
            return (DDI_FAILURE);
        ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec;
        ret = (*psm_intr_ops)(rdip, hdlp,
            PSM_INTR_OP_FREE_VECTORS, NULL);
    } else {
        /*
         * No APIX module; fall back to the old scheme where
         * the interrupt vector was already freed during
         * ddi_disable_intr() call.
         */
        ret = DDI_SUCCESS;
    }

    return (ret);
}

static void
isa_vendor(uint32_t id, char *vendor)
{
    vendor[0] = '@' + ((id >> 26) & 0x1f);
    vendor[1] = '@' + ((id >> 21) & 0x1f);
    vendor[2] = '@' + ((id >> 16) & 0x1f);
    vendor[3] = 0;
}

/*
 * Name a child
 */
static int
isa_name_child(dev_info_t *child, char *name, int namelen)
{
    char vendor[8];
    int device;
    uint32_t serial;
    int func;
    int bustype;
    uint32_t base;
    int proplen;
    int pnpisa = 0;
    isa_regs_t *isa_regs;

    void make_ddi_ppd(dev_info_t *, struct ddi_parent_private_data **);

    /*
     * older drivers aren't expecting the "standard" device
     * node format used by the hardware nodes.  these drivers
     * only expect their own properties set in their driver.conf
     * files.  so they tell us not to call them with hardware
     * nodes by setting the property "ignore-hardware-nodes".
     */
    if (old_driver(child))
        return (DDI_FAILURE);

    /*
     * Fill in parent-private data
     */
    if (ddi_get_parent_data(child) == NULL) {
        struct ddi_parent_private_data *pdptr;
        make_ddi_ppd(child, &pdptr);
        ddi_set_parent_data(child, pdptr);
    }

    if (ndi_dev_is_persistent_node(child) == 0) {
        /*
         * For .conf nodes, generate name from parent private data
         */
        name[0] = '\0';
        if (sparc_pd_getnreg(child) > 0) {
            (void) snprintf(name, namelen, "%x,%x",
                (uint_t)sparc_pd_getreg(child, 0)->regspec_bustype,
                (uint_t)sparc_pd_getreg(child, 0)->regspec_addr);
        }
        return (DDI_SUCCESS);
    }

    /*
     * For hw nodes, look up "reg" property
     */
    if (ddi_getlongprop(DDI_DEV_T_ANY, child, DDI_PROP_DONTPASS, "reg",
        (caddr_t)&isa_regs, &proplen) != DDI_PROP_SUCCESS) {
        return (DDI_FAILURE);
    }

    /*
     * extract the device identifications
     */
    pnpisa = isa_regs[0].phys_hi & 0x80000000;
    if (pnpisa) {
        isa_vendor(isa_regs[0].phys_hi, vendor);
        device = isa_regs[0].phys_hi & 0xffff;
        serial = isa_regs[0].phys_lo;
        func = (isa_regs[0].size >> 24) & 0xff;
        if (func != 0)
            (void) snprintf(name, namelen, "pnp%s,%04x,%x,%x",
                vendor, device, serial, func);
        else
            (void) snprintf(name, namelen, "pnp%s,%04x,%x",
                vendor, device, serial);
    } else {
        bustype = isa_regs[0].phys_hi;
        base = isa_regs[0].phys_lo;
        (void) sprintf(name, "%x,%x", bustype, base);
    }

    /*
     * free the memory allocated by ddi_getlongprop().
     */
    kmem_free(isa_regs, proplen);

    return (DDI_SUCCESS);
}

static int
isa_initchild(dev_info_t *child)
{
    char name[80];

    if (isa_name_child(child, name, 80) != DDI_SUCCESS)
        return (DDI_FAILURE);
    ddi_set_name_addr(child, name);

    if (ndi_dev_is_persistent_node(child) != 0)
        return (DDI_SUCCESS);

    /*
     * This is a .conf node, try merge properties onto a
     * hw node with the same name.
     */
    if (ndi_merge_node(child, isa_name_child) == DDI_SUCCESS) {
        /*
         * Return failure to remove node
         */
        impl_ddi_sunbus_removechild(child);
        return (DDI_FAILURE);
    }
    /*
     * Cannot merge node, permit pseudo children
     */
    return (DDI_SUCCESS);
}

/*
 * called when ACPI enumeration is not used
 */
static void
add_known_used_resources(void)
{
    /* needs to be in increasing order */
    int intr[] = {0x1, 0x3, 0x4, 0x6, 0x7, 0xc};
    int dma[] = {0x2};
    int io[] = {0x60, 0x1, 0x64, 0x1, 0x2f8, 0x8, 0x378, 0x8, 0x3f0, 0x10,
        0x778, 0x4};
    dev_info_t *usedrdip;

    usedrdip = ddi_find_devinfo(USED_RESOURCES, -1, 0);

    if (usedrdip == NULL) {
        (void) ndi_devi_alloc_sleep(ddi_root_node(), USED_RESOURCES,
            (pnode_t)DEVI_SID_NODEID, &usedrdip);
    }

    (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, usedrdip,
        "interrupts", (int *)intr, (int)(sizeof (intr) / sizeof (int)));
    (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, usedrdip,
        "io-space", (int *)io, (int)(sizeof (io) / sizeof (int)));
    (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, usedrdip,
        "dma-channels", (int *)dma, (int)(sizeof (dma) / sizeof (int)));
    (void) ndi_devi_bind_driver(usedrdip, 0);

}

/*
 * Return non-zero if UART device exists.
 */
static int
uart_exists(ushort_t port)
{
    outb(port + COM_SCR, (char)0x5a);
    outb(port + COM_ISR, (char)0x00);
    return (inb(port + COM_SCR) == (char)0x5a);
}

static void
isa_enumerate(int reprogram)
{
    int circ, i;
    dev_info_t *xdip;
    dev_info_t *isa_dip = ddi_find_devinfo("isa", -1, 0);

    struct regspec i8042_regs[] = {
        {1, 0x60, 0x1},
        {1, 0x64, 0x1}
    };
    int i8042_intrs[] = {0x1, 0xc};
    char *acpi_prop;
    int acpi_enum = 1; /* ACPI is default to be on */
#if defined(__xpv)
    int cons, ttyn;

    cons = console_hypervisor_dev_type(&ttyn);
#endif
    if (reprogram || !isa_dip)
        return;

    bzero(isa_extra_resource, MAX_EXTRA_RESOURCE * sizeof (struct regspec));

    ndi_devi_enter(isa_dip, &circ);

    if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
        DDI_PROP_DONTPASS, "acpi-enum", &acpi_prop) == DDI_PROP_SUCCESS) {
        acpi_enum = strcmp("off", acpi_prop);
        ddi_prop_free(acpi_prop);
    }

    if (acpi_enum) {
        if (acpi_isa_device_enum(isa_dip)) {
            ndi_devi_exit(isa_dip, circ);
            if (isa_resource_setup() != NDI_SUCCESS) {
                cmn_err(CE_WARN, "isa nexus: isa "
                    "resource setup failed");
            }

            /* serial ports? */
            enumerate_BIOS_serial(isa_dip);

            /* adjust parallel port size  */
            adjust_prtsz(isa_dip);

            isa_create_ranges_prop(isa_dip);
            return;
        }
        cmn_err(CE_NOTE, "!Solaris did not detect ACPI BIOS");
    }
    cmn_err(CE_NOTE, "!ACPI is off");

    /* serial ports */
    for (i = 0; i < min_BIOS_serial; i++) {
        ushort_t addr = asy_regs[i].regspec_addr;
        if (!uart_exists(addr))
            continue;
#if defined(__xpv)
        if (cons == CONS_TTY && ttyn == i)
            continue;
#endif
        ndi_devi_alloc_sleep(isa_dip, "asy",
            (pnode_t)DEVI_SID_NODEID, &xdip);
        (void) ndi_prop_update_string(DDI_DEV_T_NONE, xdip,
            "compatible", "PNP0500");
        /* This should be gotten from master file: */
        (void) ndi_prop_update_string(DDI_DEV_T_NONE, xdip,
            "model", "Standard PC COM port");
        (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, xdip,
            "reg", (int *)&asy_regs[i], 3);
        (void) ndi_prop_update_int(DDI_DEV_T_NONE, xdip,
            "interrupts", asy_intrs[i]);
        (void) ndi_devi_bind_driver(xdip, 0);
        /* Adjusting isa_extra here causes a kernel dump later. */
    }

    /* i8042 node */
    ndi_devi_alloc_sleep(isa_dip, "i8042",
        (pnode_t)DEVI_SID_NODEID, &xdip);
    (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, xdip,
        "reg", (int *)i8042_regs, 6);
    (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, xdip,
        "interrupts", (int *)i8042_intrs, 2);
    (void) ndi_prop_update_string(DDI_DEV_T_NONE, xdip,
        "unit-address", "1,60");
    (void) ndi_devi_bind_driver(xdip, 0);

    add_known_used_resources();

    ndi_devi_exit(isa_dip, circ);

    isa_create_ranges_prop(isa_dip);
}

/*
 * On some machines, serial port 2 isn't listed in the ACPI table.
 * This function goes through the base I/O addresses and makes sure all
 * the serial ports there are in the dev_info tree.  If any are missing,
 * this function will add them.
 */

static void
enumerate_BIOS_serial(dev_info_t *isa_dip)
{
    int i;
    dev_info_t *xdip;
    int found;
    int ret;
    struct regspec *tmpregs;
    int tmpregs_len;
#if defined(__xpv)
    int cons, ttyn;

    cons = console_hypervisor_dev_type(&ttyn);
#endif

    /*
     * Scan the base I/O addresses of the first four serial ports.
     */
    for (i = 0; i < num_BIOS_serial; i++) {
        ushort_t addr = asy_regs[i].regspec_addr;

        /* Look for it in the dev_info tree */
        found = 0;
        for (xdip = ddi_get_child(isa_dip); xdip != NULL;
            xdip = ddi_get_next_sibling(xdip)) {
            if (strncmp(ddi_node_name(xdip), "asy", 3) != 0) {
                /* skip non asy */
                continue;
            }

            /* Match by addr */
            ret = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, xdip,
                DDI_PROP_DONTPASS, "reg", (int **)&tmpregs,
                (uint_t *)&tmpregs_len);
            if (ret != DDI_PROP_SUCCESS) {
                /* error */
                continue;
            }

            if (tmpregs->regspec_addr == addr)
                found = 1;

            /*
             * Free the memory allocated by
             * ddi_prop_lookup_int_array().
             */
            ddi_prop_free(tmpregs);

            if (found) {
                if (asy_intr_override & 1<<i) {
                    (void) ndi_prop_update_int(
                        DDI_DEV_T_NONE, xdip,
                        "interrupts", asy_intrs[i]);
                }

                break;
            }
        }

        /* If not found, then add it */
        if (!found && uart_exists(addr)) {
            ndi_devi_alloc_sleep(isa_dip, "asy",
                (pnode_t)DEVI_SID_NODEID, &xdip);
            (void) ndi_prop_update_string(DDI_DEV_T_NONE, xdip,
                "compatible", "PNP0500");
            /* This should be gotten from master file: */
            (void) ndi_prop_update_string(DDI_DEV_T_NONE, xdip,
                "model", "Standard PC COM port");
            (void) ndi_prop_update_int_array(DDI_DEV_T_NONE, xdip,
                "reg", (int *)&asy_regs[i], 3);
            (void) ndi_prop_update_int(DDI_DEV_T_NONE, xdip,
                "interrupts", asy_intrs[i]);
            (void) ndi_devi_bind_driver(xdip, 0);

            ASSERT(isa_extra_count < MAX_EXTRA_RESOURCE);
            bcopy(&asy_regs[i],
                isa_extra_resource + isa_extra_count,
                sizeof (struct regspec));
            isa_extra_count++;
        }
    }

    /*
     * An asy node may have been attached via ACPI enumeration, or
     * directly from this file.  Check each serial port to see if it
     * is in use by the hypervisor.  If it is in use, then remove
     * the node from the device tree.
     */
#if defined(__xpv)
    i = 0;

    for (xdip = ddi_get_child(isa_dip); xdip != NULL; ) {
        dev_info_t *curdip;

        curdip = xdip;
        xdip = ddi_get_next_sibling(xdip);

        if (strncmp(ddi_node_name(curdip), "asy", 3) != 0)
            continue;

        if (cons == CONS_TTY && ttyn == i) {
            ret = ndi_devi_free(curdip);
            if (ret != DDI_SUCCESS) {
                cmn_err(CE_WARN,
                    "could not remove asy%d node", i);
            }

            cmn_err(CE_NOTE, "!asy%d unavailable, reserved"
                " to hypervisor", i);
        }

        i++;
    }
#endif

}

/*
 * Some machine comes with an illegal parallel port size of 3
 * bytes in ACPI, even parallel port mode is ECP.
 */
#define DEFAULT_PRT_SIZE    8
static void
adjust_prtsz(dev_info_t *isa_dip)
{
    dev_info_t *cdip;
    struct regspec *regs_p, *extreg_p;
    int regs_len, nreg, i;
    char *name;

    for (cdip = ddi_get_child(isa_dip); cdip != NULL;
        cdip = ddi_get_next_sibling(cdip)) {
        name = ddi_node_name(cdip);
        if ((strncmp(name, "lp", 2) != 0) || (strnlen(name, 3) != 2))
            continue;   /* skip non parallel */

        if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, cdip,
            DDI_PROP_DONTPASS, "reg", (int **)&regs_p,
            (uint_t *)&regs_len) != DDI_PROP_SUCCESS)
            continue;

        nreg = regs_len / (sizeof (struct regspec) / sizeof (int));
        for (i = 0; i < nreg; i++) {
            if (regs_p[i].regspec_size == DEFAULT_PRT_SIZE)
                continue;

            ASSERT(isa_extra_count < MAX_EXTRA_RESOURCE);
            extreg_p = &isa_extra_resource[isa_extra_count++];
            extreg_p->regspec_bustype = ISA_ADDR_IO;
            extreg_p->regspec_addr = regs_p[i].regspec_addr;
            extreg_p->regspec_size = DEFAULT_PRT_SIZE;
        }

        ddi_prop_free(regs_p);
    }
}