8322 nl: misleading-indentation

[unleashed/tickless.git] / usr / src / uts / i86pc / os / ddi_impl.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 (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2012 Garrett D'Amore <garrett@damore.org>
 * Copyright 2014 Pluribus Networks, Inc.
 * Copyright 2016 Nexenta Systems, Inc.
 */

/*
 * PC specific DDI implementation
 */
#include <sys/types.h>
#include <sys/autoconf.h>
#include <sys/avintr.h>
#include <sys/bootconf.h>
#include <sys/conf.h>
#include <sys/cpuvar.h>
#include <sys/ddi_impldefs.h>
#include <sys/ddi_subrdefs.h>
#include <sys/ethernet.h>
#include <sys/fp.h>
#include <sys/instance.h>
#include <sys/kmem.h>
#include <sys/machsystm.h>
#include <sys/modctl.h>
#include <sys/promif.h>
#include <sys/prom_plat.h>
#include <sys/sunndi.h>
#include <sys/ndi_impldefs.h>
#include <sys/ddi_impldefs.h>
#include <sys/sysmacros.h>
#include <sys/systeminfo.h>
#include <sys/utsname.h>
#include <sys/atomic.h>
#include <sys/spl.h>
#include <sys/archsystm.h>
#include <vm/seg_kmem.h>
#include <sys/ontrap.h>
#include <sys/fm/protocol.h>
#include <sys/ramdisk.h>
#include <sys/sunndi.h>
#include <sys/vmem.h>
#include <sys/pci_impl.h>
#if defined(__xpv)
#include <sys/hypervisor.h>
#endif
#include <sys/mach_intr.h>
#include <vm/hat_i86.h>
#include <sys/x86_archext.h>
#include <sys/avl.h>

/*
 * DDI Boot Configuration
 */

/*
 * Platform drivers on this platform
 */
char *platform_module_list[] = {
        "acpippm",
        "ppm",
        (char *)0
};

/* pci bus resource maps */
struct pci_bus_resource *pci_bus_res;

size_t dma_max_copybuf_size = 0x101000;         /* 1M + 4K */

uint64_t ramdisk_start, ramdisk_end;

int pseudo_isa = 0;

/*
 * Forward declarations
 */
static int getlongprop_buf();
static void get_boot_properties(void);
static void impl_bus_initialprobe(void);
static void impl_bus_reprobe(void);

static int poke_mem(peekpoke_ctlops_t *in_args);
static int peek_mem(peekpoke_ctlops_t *in_args);

static int kmem_override_cache_attrs(caddr_t, size_t, uint_t);

#if defined(__amd64) && !defined(__xpv)
extern void immu_init(void);
#endif

/*
 * We use an AVL tree to store contiguous address allocations made with the
 * kalloca() routine, so that we can return the size to free with kfreea().
 * Note that in the future it would be vastly faster if we could eliminate
 * this lookup by insisting that all callers keep track of their own sizes,
 * just as for kmem_alloc().
 */
struct ctgas {
        avl_node_t ctg_link;
        void *ctg_addr;
        size_t ctg_size;
};

static avl_tree_t ctgtree;

static kmutex_t         ctgmutex;
#define CTGLOCK()       mutex_enter(&ctgmutex)
#define CTGUNLOCK()     mutex_exit(&ctgmutex)

/*
 * Minimum pfn value of page_t's put on the free list.  This is to simplify
 * support of ddi dma memory requests which specify small, non-zero addr_lo
 * values.
 *
 * The default value of 2, which corresponds to the only known non-zero addr_lo
 * value used, means a single page will be sacrificed (pfn typically starts
 * at 1).  ddiphysmin can be set to 0 to disable. It cannot be set above 0x100
 * otherwise mp startup panics.
 */
pfn_t   ddiphysmin = 2;

static void
check_driver_disable(void)
{
        int proplen = 128;
        char *prop_name;
        char *drv_name, *propval;
        major_t major;

        prop_name = kmem_alloc(proplen, KM_SLEEP);
        for (major = 0; major < devcnt; major++) {
                drv_name = ddi_major_to_name(major);
                if (drv_name == NULL)
                        continue;
                (void) snprintf(prop_name, proplen, "disable-%s", drv_name);
                if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
                    DDI_PROP_DONTPASS, prop_name, &propval) == DDI_SUCCESS) {
                        if (strcmp(propval, "true") == 0) {
                                devnamesp[major].dn_flags |= DN_DRIVER_REMOVED;
                                cmn_err(CE_NOTE, "driver %s disabled",
                                    drv_name);
                        }
                        ddi_prop_free(propval);
                }
        }
        kmem_free(prop_name, proplen);
}


/*
 * Configure the hardware on the system.
 * Called before the rootfs is mounted
 */
void
configure(void)
{
        extern void i_ddi_init_root();

#if defined(__i386)
        extern int fpu_pentium_fdivbug;
#endif  /* __i386 */
        extern int fpu_ignored;

        /*
         * Determine if an FPU is attached
         */

        fpu_probe();

#if defined(__i386)
        if (fpu_pentium_fdivbug) {
                printf("\
FP hardware exhibits Pentium floating point divide problem\n");
        }
#endif  /* __i386 */

        if (fpu_ignored) {
                printf("FP hardware will not be used\n");
        } else if (!fpu_exists) {
                printf("No FPU in configuration\n");
        }

        /*
         * Initialize devices on the machine.
         * Uses configuration tree built by the PROMs to determine what
         * is present, and builds a tree of prototype dev_info nodes
         * corresponding to the hardware which identified itself.
         */

        /*
         * Initialize root node.
         */
        i_ddi_init_root();

        /* reprogram devices not set up by firmware (BIOS) */
        impl_bus_reprobe();

#if defined(__amd64) && !defined(__xpv)
        /*
         * Setup but don't startup the IOMMU
         * Startup happens later via a direct call
         * to IOMMU code by boot code.
         * At this point, all PCI bus renumbering
         * is done, so safe to init the IMMU
         * AKA Intel IOMMU.
         */
        immu_init();
#endif

        /*
         * attach the isa nexus to get ACPI resource usage
         * isa is "kind of" a pseudo node
         */
#if defined(__xpv)
        if (DOMAIN_IS_INITDOMAIN(xen_info)) {
                if (pseudo_isa)
                        (void) i_ddi_attach_pseudo_node("isa");
                else
                        (void) i_ddi_attach_hw_nodes("isa");
        }
#else
        if (pseudo_isa)
                (void) i_ddi_attach_pseudo_node("isa");
        else
                (void) i_ddi_attach_hw_nodes("isa");
#endif
}

/*
 * The "status" property indicates the operational status of a device.
 * If this property is present, the value is a string indicating the
 * status of the device as follows:
 *
 *      "okay"          operational.
 *      "disabled"      not operational, but might become operational.
 *      "fail"          not operational because a fault has been detected,
 *                      and it is unlikely that the device will become
 *                      operational without repair. no additional details
 *                      are available.
 *      "fail-xxx"      not operational because a fault has been detected,
 *                      and it is unlikely that the device will become
 *                      operational without repair. "xxx" is additional
 *                      human-readable information about the particular
 *                      fault condition that was detected.
 *
 * The absence of this property means that the operational status is
 * unknown or okay.
 *
 * This routine checks the status property of the specified device node
 * and returns 0 if the operational status indicates failure, and 1 otherwise.
 *
 * The property may exist on plug-in cards the existed before IEEE 1275-1994.
 * And, in that case, the property may not even be a string. So we carefully
 * check for the value "fail", in the beginning of the string, noting
 * the property length.
 */
int
status_okay(int id, char *buf, int buflen)
{
        char status_buf[OBP_MAXPROPNAME];
        char *bufp = buf;
        int len = buflen;
        int proplen;
        static const char *status = "status";
        static const char *fail = "fail";
        int fail_len = (int)strlen(fail);

        /*
         * Get the proplen ... if it's smaller than "fail",
         * or doesn't exist ... then we don't care, since
         * the value can't begin with the char string "fail".
         *
         * NB: proplen, if it's a string, includes the NULL in the
         * the size of the property, and fail_len does not.
         */
        proplen = prom_getproplen((pnode_t)id, (caddr_t)status);
        if (proplen <= fail_len)        /* nonexistant or uninteresting len */
                return (1);

        /*
         * if a buffer was provided, use it
         */
        if ((buf == (char *)NULL) || (buflen <= 0)) {
                bufp = status_buf;
                len = sizeof (status_buf);
        }
        *bufp = (char)0;

        /*
         * Get the property into the buffer, to the extent of the buffer,
         * and in case the buffer is smaller than the property size,
         * NULL terminate the buffer. (This handles the case where
         * a buffer was passed in and the caller wants to print the
         * value, but the buffer was too small).
         */
        (void) prom_bounded_getprop((pnode_t)id, (caddr_t)status,
            (caddr_t)bufp, len);
        *(bufp + len - 1) = (char)0;

        /*
         * If the value begins with the char string "fail",
         * then it means the node is failed. We don't care
         * about any other values. We assume the node is ok
         * although it might be 'disabled'.
         */
        if (strncmp(bufp, fail, fail_len) == 0)
                return (0);

        return (1);
}

/*
 * Check the status of the device node passed as an argument.
 *
 *      if ((status is OKAY) || (status is DISABLED))
 *              return DDI_SUCCESS
 *      else
 *              print a warning and return DDI_FAILURE
 */
/*ARGSUSED1*/
int
check_status(int id, char *name, dev_info_t *parent)
{
        char status_buf[64];
        char devtype_buf[OBP_MAXPROPNAME];
        int retval = DDI_FAILURE;

        /*
         * is the status okay?
         */
        if (status_okay(id, status_buf, sizeof (status_buf)))
                return (DDI_SUCCESS);

        /*
         * a status property indicating bad memory will be associated
         * with a node which has a "device_type" property with a value of
         * "memory-controller". in this situation, return DDI_SUCCESS
         */
        if (getlongprop_buf(id, OBP_DEVICETYPE, devtype_buf,
            sizeof (devtype_buf)) > 0) {
                if (strcmp(devtype_buf, "memory-controller") == 0)
                        retval = DDI_SUCCESS;
        }

        /*
         * print the status property information
         */
        cmn_err(CE_WARN, "status '%s' for '%s'", status_buf, name);
        return (retval);
}

/*ARGSUSED*/
uint_t
softlevel1(caddr_t arg1, caddr_t arg2)
{
        softint();
        return (1);
}

/*
 * Allow for implementation specific correction of PROM property values.
 */

/*ARGSUSED*/
void
impl_fix_props(dev_info_t *dip, dev_info_t *ch_dip, char *name, int len,
    caddr_t buffer)
{
        /*
         * There are no adjustments needed in this implementation.
         */
}

static int
getlongprop_buf(int id, char *name, char *buf, int maxlen)
{
        int size;

        size = prom_getproplen((pnode_t)id, name);
        if (size <= 0 || (size > maxlen - 1))
                return (-1);

        if (-1 == prom_getprop((pnode_t)id, name, buf))
                return (-1);

        if (strcmp("name", name) == 0) {
                if (buf[size - 1] != '\0') {
                        buf[size] = '\0';
                        size += 1;
                }
        }

        return (size);
}

static int
get_prop_int_array(dev_info_t *di, char *pname, int **pval, uint_t *plen)
{
        int ret;

        if ((ret = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, di,
            DDI_PROP_DONTPASS, pname, pval, plen))
            == DDI_PROP_SUCCESS) {
                *plen = (*plen) * (sizeof (int));
        }
        return (ret);
}


/*
 * Node Configuration
 */

struct prop_ispec {
        uint_t  pri, vec;
};

/*
 * For the x86, we're prepared to claim that the interrupt string
 * is in the form of a list of <ipl,vec> specifications.
 */

#define VEC_MIN 1
#define VEC_MAX 255

static int
impl_xlate_intrs(dev_info_t *child, int *in,
    struct ddi_parent_private_data *pdptr)
{
        size_t size;
        int n;
        struct intrspec *new;
        caddr_t got_prop;
        int *inpri;
        int got_len;
        extern int ignore_hardware_nodes;       /* force flag from ddi_impl.c */

        static char bad_intr_fmt[] =
            "bad interrupt spec from %s%d - ipl %d, irq %d\n";

        /*
         * determine if the driver is expecting the new style "interrupts"
         * property which just contains the IRQ, or the old style which
         * contains pairs of <IPL,IRQ>.  if it is the new style, we always
         * assign IPL 5 unless an "interrupt-priorities" property exists.
         * in that case, the "interrupt-priorities" property contains the
         * IPL values that match, one for one, the IRQ values in the
         * "interrupts" property.
         */
        inpri = NULL;
        if ((ddi_getprop(DDI_DEV_T_ANY, child, DDI_PROP_DONTPASS,
            "ignore-hardware-nodes", -1) != -1) || ignore_hardware_nodes) {
                /* the old style "interrupts" property... */

                /*
                 * The list consists of <ipl,vec> elements
                 */
                if ((n = (*in++ >> 1)) < 1)
                        return (DDI_FAILURE);

                pdptr->par_nintr = n;
                size = n * sizeof (struct intrspec);
                new = pdptr->par_intr = kmem_zalloc(size, KM_SLEEP);

                while (n--) {
                        int level = *in++;
                        int vec = *in++;

                        if (level < 1 || level > MAXIPL ||
                            vec < VEC_MIN || vec > VEC_MAX) {
                                cmn_err(CE_CONT, bad_intr_fmt,
                                    DEVI(child)->devi_name,
                                    DEVI(child)->devi_instance, level, vec);
                                goto broken;
                        }
                        new->intrspec_pri = level;
                        if (vec != 2)
                                new->intrspec_vec = vec;
                        else
                                /*
                                 * irq 2 on the PC bus is tied to irq 9
                                 * on ISA, EISA and MicroChannel
                                 */
                                new->intrspec_vec = 9;
                        new++;
                }

                return (DDI_SUCCESS);
        } else {
                /* the new style "interrupts" property... */

                /*
                 * The list consists of <vec> elements
                 */
                if ((n = (*in++)) < 1)
                        return (DDI_FAILURE);

                pdptr->par_nintr = n;
                size = n * sizeof (struct intrspec);
                new = pdptr->par_intr = kmem_zalloc(size, KM_SLEEP);

                /* XXX check for "interrupt-priorities" property... */
                if (ddi_getlongprop(DDI_DEV_T_ANY, child, DDI_PROP_DONTPASS,
                    "interrupt-priorities", (caddr_t)&got_prop, &got_len)
                    == DDI_PROP_SUCCESS) {
                        if (n != (got_len / sizeof (int))) {
                                cmn_err(CE_CONT,
                                    "bad interrupt-priorities length"
                                    " from %s%d: expected %d, got %d\n",
                                    DEVI(child)->devi_name,
                                    DEVI(child)->devi_instance, n,
                                    (int)(got_len / sizeof (int)));
                                goto broken;
                        }
                        inpri = (int *)got_prop;
                }

                while (n--) {
                        int level;
                        int vec = *in++;

                        if (inpri == NULL)
                                level = 5;
                        else
                                level = *inpri++;

                        if (level < 1 || level > MAXIPL ||
                            vec < VEC_MIN || vec > VEC_MAX) {
                                cmn_err(CE_CONT, bad_intr_fmt,
                                    DEVI(child)->devi_name,
                                    DEVI(child)->devi_instance, level, vec);
                                goto broken;
                        }
                        new->intrspec_pri = level;
                        if (vec != 2)
                                new->intrspec_vec = vec;
                        else
                                /*
                                 * irq 2 on the PC bus is tied to irq 9
                                 * on ISA, EISA and MicroChannel
                                 */
                                new->intrspec_vec = 9;
                        new++;
                }

                if (inpri != NULL)
                        kmem_free(got_prop, got_len);
                return (DDI_SUCCESS);
        }

broken:
        kmem_free(pdptr->par_intr, size);
        pdptr->par_intr = NULL;
        pdptr->par_nintr = 0;
        if (inpri != NULL)
                kmem_free(got_prop, got_len);

        return (DDI_FAILURE);
}

/*
 * Create a ddi_parent_private_data structure from the ddi properties of
 * the dev_info node.
 *
 * The "reg" and either an "intr" or "interrupts" properties are required
 * if the driver wishes to create mappings or field interrupts on behalf
 * of the device.
 *
 * The "reg" property is assumed to be a list of at least one triple
 *
 *      <bustype, address, size>*1
 *
 * The "intr" property is assumed to be a list of at least one duple
 *
 *      <SPARC ipl, vector#>*1
 *
 * The "interrupts" property is assumed to be a list of at least one
 * n-tuples that describes the interrupt capabilities of the bus the device
 * is connected to.  For SBus, this looks like
 *
 *      <SBus-level>*1
 *
 * (This property obsoletes the 'intr' property).
 *
 * The "ranges" property is optional.
 */
void
make_ddi_ppd(dev_info_t *child, struct ddi_parent_private_data **ppd)
{
        struct ddi_parent_private_data *pdptr;
        int n;
        int *reg_prop, *rng_prop, *intr_prop, *irupts_prop;
        uint_t reg_len, rng_len, intr_len, irupts_len;

        *ppd = pdptr = kmem_zalloc(sizeof (*pdptr), KM_SLEEP);

        /*
         * Handle the 'reg' property.
         */
        if ((get_prop_int_array(child, "reg", &reg_prop, &reg_len) ==
            DDI_PROP_SUCCESS) && (reg_len != 0)) {
                pdptr->par_nreg = reg_len / (int)sizeof (struct regspec);
                pdptr->par_reg = (struct regspec *)reg_prop;
        }

        /*
         * See if I have a range (adding one where needed - this
         * means to add one for sbus node in sun4c, when romvec > 0,
         * if no range is already defined in the PROM node.
         * (Currently no sun4c PROMS define range properties,
         * but they should and may in the future.)  For the SBus
         * node, the range is defined by the SBus reg property.
         */
        if (get_prop_int_array(child, "ranges", &rng_prop, &rng_len)
            == DDI_PROP_SUCCESS) {
                pdptr->par_nrng = rng_len / (int)(sizeof (struct rangespec));
                pdptr->par_rng = (struct rangespec *)rng_prop;
        }

        /*
         * Handle the 'intr' and 'interrupts' properties
         */

        /*
         * For backwards compatibility
         * we first look for the 'intr' property for the device.
         */
        if (get_prop_int_array(child, "intr", &intr_prop, &intr_len)
            != DDI_PROP_SUCCESS) {
                intr_len = 0;
        }

        /*
         * If we're to support bus adapters and future platforms cleanly,
         * we need to support the generalized 'interrupts' property.
         */
        if (get_prop_int_array(child, "interrupts", &irupts_prop,
            &irupts_len) != DDI_PROP_SUCCESS) {
                irupts_len = 0;
        } else if (intr_len != 0) {
                /*
                 * If both 'intr' and 'interrupts' are defined,
                 * then 'interrupts' wins and we toss the 'intr' away.
                 */
                ddi_prop_free((void *)intr_prop);
                intr_len = 0;
        }

        if (intr_len != 0) {

                /*
                 * Translate the 'intr' property into an array
                 * an array of struct intrspec's.  There's not really
                 * very much to do here except copy what's out there.
                 */

                struct intrspec *new;
                struct prop_ispec *l;

                n = pdptr->par_nintr = intr_len / sizeof (struct prop_ispec);
                l = (struct prop_ispec *)intr_prop;
                pdptr->par_intr =
                    new = kmem_zalloc(n * sizeof (struct intrspec), KM_SLEEP);
                while (n--) {
                        new->intrspec_pri = l->pri;
                        new->intrspec_vec = l->vec;
                        new++;
                        l++;
                }
                ddi_prop_free((void *)intr_prop);

        } else if ((n = irupts_len) != 0) {
                size_t size;
                int *out;

                /*
                 * Translate the 'interrupts' property into an array
                 * of intrspecs for the rest of the DDI framework to
                 * toy with.  Only our ancestors really know how to
                 * do this, so ask 'em.  We massage the 'interrupts'
                 * property so that it is pre-pended by a count of
                 * the number of integers in the argument.
                 */
                size = sizeof (int) + n;
                out = kmem_alloc(size, KM_SLEEP);
                *out = n / sizeof (int);
                bcopy(irupts_prop, out + 1, (size_t)n);
                ddi_prop_free((void *)irupts_prop);
                if (impl_xlate_intrs(child, out, pdptr) != DDI_SUCCESS) {
                        cmn_err(CE_CONT,
                            "Unable to translate 'interrupts' for %s%d\n",
                            DEVI(child)->devi_binding_name,
                            DEVI(child)->devi_instance);
                }
                kmem_free(out, size);
        }
}

/*
 * Name a child
 */
static int
impl_sunbus_name_child(dev_info_t *child, char *name, int namelen)
{
        /*
         * Fill in parent-private data and this function returns to us
         * an indication if it used "registers" to fill in the 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);
        }

        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);
}

/*
 * Called from the bus_ctl op of sunbus (sbus, obio, etc) nexus drivers
 * to implement the DDI_CTLOPS_INITCHILD operation.  That is, it names
 * the children of sun busses based on the reg spec.
 *
 * Handles the following properties (in make_ddi_ppd):
 *      Property                value
 *        Name                  type
 *      reg             register spec
 *      intr            old-form interrupt spec
 *      interrupts      new (bus-oriented) interrupt spec
 *      ranges          range spec
 */
int
impl_ddi_sunbus_initchild(dev_info_t *child)
{
        char name[MAXNAMELEN];
        void impl_ddi_sunbus_removechild(dev_info_t *);

        /*
         * Name the child, also makes parent private data
         */
        (void) impl_sunbus_name_child(child, name, MAXNAMELEN);
        ddi_set_name_addr(child, name);

        /*
         * Attempt to merge a .conf node; if successful, remove the
         * .conf node.
         */
        if ((ndi_dev_is_persistent_node(child) == 0) &&
            (ndi_merge_node(child, impl_sunbus_name_child) == DDI_SUCCESS)) {
                /*
                 * Return failure to remove node
                 */
                impl_ddi_sunbus_removechild(child);
                return (DDI_FAILURE);
        }
        return (DDI_SUCCESS);
}

void
impl_free_ddi_ppd(dev_info_t *dip)
{
        struct ddi_parent_private_data *pdptr;
        size_t n;

        if ((pdptr = ddi_get_parent_data(dip)) == NULL)
                return;

        if ((n = (size_t)pdptr->par_nintr) != 0)
                /*
                 * Note that kmem_free is used here (instead of
                 * ddi_prop_free) because the contents of the
                 * property were placed into a separate buffer and
                 * mucked with a bit before being stored in par_intr.
                 * The actual return value from the prop lookup
                 * was freed with ddi_prop_free previously.
                 */
                kmem_free(pdptr->par_intr, n * sizeof (struct intrspec));

        if ((n = (size_t)pdptr->par_nrng) != 0)
                ddi_prop_free((void *)pdptr->par_rng);

        if ((n = pdptr->par_nreg) != 0)
                ddi_prop_free((void *)pdptr->par_reg);

        kmem_free(pdptr, sizeof (*pdptr));
        ddi_set_parent_data(dip, NULL);
}

void
impl_ddi_sunbus_removechild(dev_info_t *dip)
{
        impl_free_ddi_ppd(dip);
        ddi_set_name_addr(dip, NULL);
        /*
         * Strip the node to properly convert it back to prototype form
         */
        impl_rem_dev_props(dip);
}

/*
 * DDI Interrupt
 */

/*
 * turn this on to force isa, eisa, and mca device to ignore the new
 * hardware nodes in the device tree (normally turned on only for
 * drivers that need it by setting the property "ignore-hardware-nodes"
 * in their driver.conf file).
 *
 * 7/31/96 -- Turned off globally.  Leaving variable in for the moment
 *              as safety valve.
 */
int ignore_hardware_nodes = 0;

/*
 * Local data
 */
static struct impl_bus_promops *impl_busp;


/*
 * New DDI interrupt framework
 */

/*
 * i_ddi_intr_ops:
 *
 * This is the interrupt operator function wrapper for the bus function
 * bus_intr_op.
 */
int
i_ddi_intr_ops(dev_info_t *dip, dev_info_t *rdip, ddi_intr_op_t op,
    ddi_intr_handle_impl_t *hdlp, void * result)
{
        dev_info_t      *pdip = (dev_info_t *)DEVI(dip)->devi_parent;
        int             ret = DDI_FAILURE;

        /* request parent to process this interrupt op */
        if (NEXUS_HAS_INTR_OP(pdip))
                ret = (*(DEVI(pdip)->devi_ops->devo_bus_ops->bus_intr_op))(
                    pdip, rdip, op, hdlp, result);
        else
                cmn_err(CE_WARN, "Failed to process interrupt "
                    "for %s%d due to down-rev nexus driver %s%d",
                    ddi_get_name(rdip), ddi_get_instance(rdip),
                    ddi_get_name(pdip), ddi_get_instance(pdip));
        return (ret);
}

/*
 * i_ddi_add_softint - allocate and add a soft interrupt to the system
 */
int
i_ddi_add_softint(ddi_softint_hdl_impl_t *hdlp)
{
        int ret;

        /* add soft interrupt handler */
        ret = add_avsoftintr((void *)hdlp, hdlp->ih_pri, hdlp->ih_cb_func,
            DEVI(hdlp->ih_dip)->devi_name, hdlp->ih_cb_arg1, hdlp->ih_cb_arg2);
        return (ret ? DDI_SUCCESS : DDI_FAILURE);
}


void
i_ddi_remove_softint(ddi_softint_hdl_impl_t *hdlp)
{
        (void) rem_avsoftintr((void *)hdlp, hdlp->ih_pri, hdlp->ih_cb_func);
}


extern void (*setsoftint)(int, struct av_softinfo *);
extern boolean_t av_check_softint_pending(struct av_softinfo *, boolean_t);

int
i_ddi_trigger_softint(ddi_softint_hdl_impl_t *hdlp, void *arg2)
{
        if (av_check_softint_pending(hdlp->ih_pending, B_FALSE))
                return (DDI_EPENDING);

        update_avsoftintr_args((void *)hdlp, hdlp->ih_pri, arg2);

        (*setsoftint)(hdlp->ih_pri, hdlp->ih_pending);
        return (DDI_SUCCESS);
}

/*
 * i_ddi_set_softint_pri:
 *
 * The way this works is that it first tries to add a softint vector
 * at the new priority in hdlp. If that succeeds; then it removes the
 * existing softint vector at the old priority.
 */
int
i_ddi_set_softint_pri(ddi_softint_hdl_impl_t *hdlp, uint_t old_pri)
{
        int ret;

        /*
         * If a softint is pending at the old priority then fail the request.
         */
        if (av_check_softint_pending(hdlp->ih_pending, B_TRUE))
                return (DDI_FAILURE);

        ret = av_softint_movepri((void *)hdlp, old_pri);
        return (ret ? DDI_SUCCESS : DDI_FAILURE);
}

void
i_ddi_alloc_intr_phdl(ddi_intr_handle_impl_t *hdlp)
{
        hdlp->ih_private = (void *)kmem_zalloc(sizeof (ihdl_plat_t), KM_SLEEP);
}

void
i_ddi_free_intr_phdl(ddi_intr_handle_impl_t *hdlp)
{
        kmem_free(hdlp->ih_private, sizeof (ihdl_plat_t));
        hdlp->ih_private = NULL;
}

int
i_ddi_get_intx_nintrs(dev_info_t *dip)
{
        struct ddi_parent_private_data *pdp;

        if ((pdp = ddi_get_parent_data(dip)) == NULL)
                return (0);

        return (pdp->par_nintr);
}

/*
 * DDI Memory/DMA
 */

/*
 * Support for allocating DMAable memory to implement
 * ddi_dma_mem_alloc(9F) interface.
 */

#define KA_ALIGN_SHIFT  7
#define KA_ALIGN        (1 << KA_ALIGN_SHIFT)
#define KA_NCACHE       (PAGESHIFT + 1 - KA_ALIGN_SHIFT)

/*
 * Dummy DMA attribute template for kmem_io[].kmem_io_attr.  We only
 * care about addr_lo, addr_hi, and align.  addr_hi will be dynamically set.
 */

static ddi_dma_attr_t kmem_io_attr = {
        DMA_ATTR_V0,
        0x0000000000000000ULL,          /* dma_attr_addr_lo */
        0x0000000000000000ULL,          /* dma_attr_addr_hi */
        0x00ffffff,
        0x1000,                         /* dma_attr_align */
        1, 1, 0xffffffffULL, 0xffffffffULL, 0x1, 1, 0
};

/* kmem io memory ranges and indices */
enum {
        IO_4P, IO_64G, IO_4G, IO_2G, IO_1G, IO_512M,
        IO_256M, IO_128M, IO_64M, IO_32M, IO_16M, MAX_MEM_RANGES
};

static struct {
        vmem_t          *kmem_io_arena;
        kmem_cache_t    *kmem_io_cache[KA_NCACHE];
        ddi_dma_attr_t  kmem_io_attr;
} kmem_io[MAX_MEM_RANGES];

static int kmem_io_idx;         /* index of first populated kmem_io[] */

static page_t *
page_create_io_wrapper(void *addr, size_t len, int vmflag, void *arg)
{
        extern page_t *page_create_io(vnode_t *, u_offset_t, uint_t,
            uint_t, struct as *, caddr_t, ddi_dma_attr_t *);

        return (page_create_io(&kvp, (u_offset_t)(uintptr_t)addr, len,
            PG_EXCL | ((vmflag & VM_NOSLEEP) ? 0 : PG_WAIT), &kas, addr, arg));
}

#ifdef __xpv
static void
segkmem_free_io(vmem_t *vmp, void * ptr, size_t size)
{
        extern void page_destroy_io(page_t *);
        segkmem_xfree(vmp, ptr, size, page_destroy_io);
}
#endif

static void *
segkmem_alloc_io_4P(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_4P].kmem_io_attr));
}

static void *
segkmem_alloc_io_64G(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_64G].kmem_io_attr));
}

static void *
segkmem_alloc_io_4G(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_4G].kmem_io_attr));
}

static void *
segkmem_alloc_io_2G(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_2G].kmem_io_attr));
}

static void *
segkmem_alloc_io_1G(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_1G].kmem_io_attr));
}

static void *
segkmem_alloc_io_512M(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_512M].kmem_io_attr));
}

static void *
segkmem_alloc_io_256M(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_256M].kmem_io_attr));
}

static void *
segkmem_alloc_io_128M(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_128M].kmem_io_attr));
}

static void *
segkmem_alloc_io_64M(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_64M].kmem_io_attr));
}

static void *
segkmem_alloc_io_32M(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_32M].kmem_io_attr));
}

static void *
segkmem_alloc_io_16M(vmem_t *vmp, size_t size, int vmflag)
{
        return (segkmem_xalloc(vmp, NULL, size, vmflag, 0,
            page_create_io_wrapper, &kmem_io[IO_16M].kmem_io_attr));
}

struct {
        uint64_t        io_limit;
        char            *io_name;
        void            *(*io_alloc)(vmem_t *, size_t, int);
        int             io_initial;     /* kmem_io_init during startup */
} io_arena_params[MAX_MEM_RANGES] = {
        {0x000fffffffffffffULL, "kmem_io_4P",   segkmem_alloc_io_4P,    1},
        {0x0000000fffffffffULL, "kmem_io_64G",  segkmem_alloc_io_64G,   0},
        {0x00000000ffffffffULL, "kmem_io_4G",   segkmem_alloc_io_4G,    1},
        {0x000000007fffffffULL, "kmem_io_2G",   segkmem_alloc_io_2G,    1},
        {0x000000003fffffffULL, "kmem_io_1G",   segkmem_alloc_io_1G,    0},
        {0x000000001fffffffULL, "kmem_io_512M", segkmem_alloc_io_512M,  0},
        {0x000000000fffffffULL, "kmem_io_256M", segkmem_alloc_io_256M,  0},
        {0x0000000007ffffffULL, "kmem_io_128M", segkmem_alloc_io_128M,  0},
        {0x0000000003ffffffULL, "kmem_io_64M",  segkmem_alloc_io_64M,   0},
        {0x0000000001ffffffULL, "kmem_io_32M",  segkmem_alloc_io_32M,   0},
        {0x0000000000ffffffULL, "kmem_io_16M",  segkmem_alloc_io_16M,   1}
};

void
kmem_io_init(int a)
{
        int     c;
        char name[40];

        kmem_io[a].kmem_io_arena = vmem_create(io_arena_params[a].io_name,
            NULL, 0, PAGESIZE, io_arena_params[a].io_alloc,
#ifdef __xpv
            segkmem_free_io,
#else
            segkmem_free,
#endif
            heap_arena, 0, VM_SLEEP);

        for (c = 0; c < KA_NCACHE; c++) {
                size_t size = KA_ALIGN << c;
                (void) sprintf(name, "%s_%lu",
                    io_arena_params[a].io_name, size);
                kmem_io[a].kmem_io_cache[c] = kmem_cache_create(name,
                    size, size, NULL, NULL, NULL, NULL,
                    kmem_io[a].kmem_io_arena, 0);
        }
}

/*
 * Return the index of the highest memory range for addr.
 */
static int
kmem_io_index(uint64_t addr)
{
        int n;

        for (n = kmem_io_idx; n < MAX_MEM_RANGES; n++) {
                if (kmem_io[n].kmem_io_attr.dma_attr_addr_hi <= addr) {
                        if (kmem_io[n].kmem_io_arena == NULL)
                                kmem_io_init(n);
                        return (n);
                }
        }
        panic("kmem_io_index: invalid addr - must be at least 16m");

        /*NOTREACHED*/
}

/*
 * Return the index of the next kmem_io populated memory range
 * after curindex.
 */
static int
kmem_io_index_next(int curindex)
{
        int n;

        for (n = curindex + 1; n < MAX_MEM_RANGES; n++) {
                if (kmem_io[n].kmem_io_arena)
                        return (n);
        }
        return (-1);
}

/*
 * allow kmem to be mapped in with different PTE cache attribute settings.
 * Used by i_ddi_mem_alloc()
 */
int
kmem_override_cache_attrs(caddr_t kva, size_t size, uint_t order)
{
        uint_t hat_flags;
        caddr_t kva_end;
        uint_t hat_attr;
        pfn_t pfn;

        if (hat_getattr(kas.a_hat, kva, &hat_attr) == -1) {
                return (-1);
        }

        hat_attr &= ~HAT_ORDER_MASK;
        hat_attr |= order | HAT_NOSYNC;
        hat_flags = HAT_LOAD_LOCK;

        kva_end = (caddr_t)(((uintptr_t)kva + size + PAGEOFFSET) &
            (uintptr_t)PAGEMASK);
        kva = (caddr_t)((uintptr_t)kva & (uintptr_t)PAGEMASK);

        while (kva < kva_end) {
                pfn = hat_getpfnum(kas.a_hat, kva);
                hat_unload(kas.a_hat, kva, PAGESIZE, HAT_UNLOAD_UNLOCK);
                hat_devload(kas.a_hat, kva, PAGESIZE, pfn, hat_attr, hat_flags);
                kva += MMU_PAGESIZE;
        }

        return (0);
}

static int
ctgcompare(const void *a1, const void *a2)
{
        /* we just want to compare virtual addresses */
        a1 = ((struct ctgas *)a1)->ctg_addr;
        a2 = ((struct ctgas *)a2)->ctg_addr;
        return (a1 == a2 ? 0 : (a1 < a2 ? -1 : 1));
}

void
ka_init(void)
{
        int a;
        paddr_t maxphysaddr;
#if !defined(__xpv)
        extern pfn_t physmax;

        maxphysaddr = mmu_ptob((paddr_t)physmax) + MMU_PAGEOFFSET;
#else
        maxphysaddr = mmu_ptob((paddr_t)HYPERVISOR_memory_op(
            XENMEM_maximum_ram_page, NULL)) + MMU_PAGEOFFSET;
#endif

        ASSERT(maxphysaddr <= io_arena_params[0].io_limit);

        for (a = 0; a < MAX_MEM_RANGES; a++) {
                if (maxphysaddr >= io_arena_params[a + 1].io_limit) {
                        if (maxphysaddr > io_arena_params[a + 1].io_limit)
                                io_arena_params[a].io_limit = maxphysaddr;
                        else
                                a++;
                        break;
                }
        }
        kmem_io_idx = a;

        for (; a < MAX_MEM_RANGES; a++) {
                kmem_io[a].kmem_io_attr = kmem_io_attr;
                kmem_io[a].kmem_io_attr.dma_attr_addr_hi =
                    io_arena_params[a].io_limit;
                /*
                 * initialize kmem_io[] arena/cache corresponding to
                 * maxphysaddr and to the "common" io memory ranges that
                 * have io_initial set to a non-zero value.
                 */
                if (io_arena_params[a].io_initial || a == kmem_io_idx)
                        kmem_io_init(a);
        }

        /* initialize ctgtree */
        avl_create(&ctgtree, ctgcompare, sizeof (struct ctgas),
            offsetof(struct ctgas, ctg_link));
}

/*
 * put contig address/size
 */
static void *
putctgas(void *addr, size_t size)
{
        struct ctgas    *ctgp;
        if ((ctgp = kmem_zalloc(sizeof (*ctgp), KM_NOSLEEP)) != NULL) {
                ctgp->ctg_addr = addr;
                ctgp->ctg_size = size;
                CTGLOCK();
                avl_add(&ctgtree, ctgp);
                CTGUNLOCK();
        }
        return (ctgp);
}

/*
 * get contig size by addr
 */
static size_t
getctgsz(void *addr)
{
        struct ctgas    *ctgp;
        struct ctgas    find;
        size_t          sz = 0;

        find.ctg_addr = addr;
        CTGLOCK();
        if ((ctgp = avl_find(&ctgtree, &find, NULL)) != NULL) {
                avl_remove(&ctgtree, ctgp);
        }
        CTGUNLOCK();

        if (ctgp != NULL) {
                sz = ctgp->ctg_size;
                kmem_free(ctgp, sizeof (*ctgp));
        }

        return (sz);
}

/*
 * contig_alloc:
 *
 *      allocates contiguous memory to satisfy the 'size' and dma attributes
 *      specified in 'attr'.
 *
 *      Not all of memory need to be physically contiguous if the
 *      scatter-gather list length is greater than 1.
 */

/*ARGSUSED*/
void *
contig_alloc(size_t size, ddi_dma_attr_t *attr, uintptr_t align, int cansleep)
{
        pgcnt_t         pgcnt = btopr(size);
        size_t          asize = pgcnt * PAGESIZE;
        page_t          *ppl;
        int             pflag;
        void            *addr;

        extern page_t *page_create_io(vnode_t *, u_offset_t, uint_t,
            uint_t, struct as *, caddr_t, ddi_dma_attr_t *);

        /* segkmem_xalloc */

        if (align <= PAGESIZE)
                addr = vmem_alloc(heap_arena, asize,
                    (cansleep) ? VM_SLEEP : VM_NOSLEEP);
        else
                addr = vmem_xalloc(heap_arena, asize, align, 0, 0, NULL, NULL,
                    (cansleep) ? VM_SLEEP : VM_NOSLEEP);
        if (addr) {
                ASSERT(!((uintptr_t)addr & (align - 1)));

                if (page_resv(pgcnt, (cansleep) ? KM_SLEEP : KM_NOSLEEP) == 0) {
                        vmem_free(heap_arena, addr, asize);
                        return (NULL);
                }
                pflag = PG_EXCL;

                if (cansleep)
                        pflag |= PG_WAIT;

                /* 4k req gets from freelists rather than pfn search */
                if (pgcnt > 1 || align > PAGESIZE)
                        pflag |= PG_PHYSCONTIG;

                ppl = page_create_io(&kvp, (u_offset_t)(uintptr_t)addr,
                    asize, pflag, &kas, (caddr_t)addr, attr);

                if (!ppl) {
                        vmem_free(heap_arena, addr, asize);
                        page_unresv(pgcnt);
                        return (NULL);
                }

                while (ppl != NULL) {
                        page_t  *pp = ppl;
                        page_sub(&ppl, pp);
                        ASSERT(page_iolock_assert(pp));
                        page_io_unlock(pp);
                        page_downgrade(pp);
                        hat_memload(kas.a_hat, (caddr_t)(uintptr_t)pp->p_offset,
                            pp, (PROT_ALL & ~PROT_USER) |
                            HAT_NOSYNC, HAT_LOAD_LOCK);
                }
        }
        return (addr);
}

void
contig_free(void *addr, size_t size)
{
        pgcnt_t pgcnt = btopr(size);
        size_t  asize = pgcnt * PAGESIZE;
        caddr_t a, ea;
        page_t  *pp;

        hat_unload(kas.a_hat, addr, asize, HAT_UNLOAD_UNLOCK);

        for (a = addr, ea = a + asize; a < ea; a += PAGESIZE) {
                pp = page_find(&kvp, (u_offset_t)(uintptr_t)a);
                if (!pp)
                        panic("contig_free: contig pp not found");

                if (!page_tryupgrade(pp)) {
                        page_unlock(pp);
                        pp = page_lookup(&kvp,
                            (u_offset_t)(uintptr_t)a, SE_EXCL);
                        if (pp == NULL)
                                panic("contig_free: page freed");
                }
                page_destroy(pp, 0);
        }

        page_unresv(pgcnt);
        vmem_free(heap_arena, addr, asize);
}

/*
 * Allocate from the system, aligned on a specific boundary.
 * The alignment, if non-zero, must be a power of 2.
 */
static void *
kalloca(size_t size, size_t align, int cansleep, int physcontig,
    ddi_dma_attr_t *attr)
{
        size_t *addr, *raddr, rsize;
        size_t hdrsize = 4 * sizeof (size_t);   /* must be power of 2 */
        int a, i, c;
        vmem_t *vmp;
        kmem_cache_t *cp = NULL;

        if (attr->dma_attr_addr_lo > mmu_ptob((uint64_t)ddiphysmin))
                return (NULL);

        align = MAX(align, hdrsize);
        ASSERT((align & (align - 1)) == 0);

        /*
         * All of our allocators guarantee 16-byte alignment, so we don't
         * need to reserve additional space for the header.
         * To simplify picking the correct kmem_io_cache, we round up to
         * a multiple of KA_ALIGN.
         */
        rsize = P2ROUNDUP_TYPED(size + align, KA_ALIGN, size_t);

        if (physcontig && rsize > PAGESIZE) {
                if (addr = contig_alloc(size, attr, align, cansleep)) {
                        if (!putctgas(addr, size))
                                contig_free(addr, size);
                        else
                                return (addr);
                }
                return (NULL);
        }

        a = kmem_io_index(attr->dma_attr_addr_hi);

        if (rsize > PAGESIZE) {
                vmp = kmem_io[a].kmem_io_arena;
                raddr = vmem_alloc(vmp, rsize,
                    (cansleep) ? VM_SLEEP : VM_NOSLEEP);
        } else {
                c = highbit((rsize >> KA_ALIGN_SHIFT) - 1);
                cp = kmem_io[a].kmem_io_cache[c];
                raddr = kmem_cache_alloc(cp, (cansleep) ? KM_SLEEP :
                    KM_NOSLEEP);
        }

        if (raddr == NULL) {
                int     na;

                ASSERT(cansleep == 0);
                if (rsize > PAGESIZE)
                        return (NULL);
                /*
                 * System does not have memory in the requested range.
                 * Try smaller kmem io ranges and larger cache sizes
                 * to see if there might be memory available in
                 * these other caches.
                 */

                for (na = kmem_io_index_next(a); na >= 0;
                    na = kmem_io_index_next(na)) {
                        ASSERT(kmem_io[na].kmem_io_arena);
                        cp = kmem_io[na].kmem_io_cache[c];
                        raddr = kmem_cache_alloc(cp, KM_NOSLEEP);
                        if (raddr)
                                goto kallocdone;
                }
                /* now try the larger kmem io cache sizes */
                for (na = a; na >= 0; na = kmem_io_index_next(na)) {
                        for (i = c + 1; i < KA_NCACHE; i++) {
                                cp = kmem_io[na].kmem_io_cache[i];
                                raddr = kmem_cache_alloc(cp, KM_NOSLEEP);
                                if (raddr)
                                        goto kallocdone;
                        }
                }
                return (NULL);
        }

kallocdone:
        ASSERT(!P2BOUNDARY((uintptr_t)raddr, rsize, PAGESIZE) ||
            rsize > PAGESIZE);

        addr = (size_t *)P2ROUNDUP((uintptr_t)raddr + hdrsize, align);
        ASSERT((uintptr_t)addr + size - (uintptr_t)raddr <= rsize);

        addr[-4] = (size_t)cp;
        addr[-3] = (size_t)vmp;
        addr[-2] = (size_t)raddr;
        addr[-1] = rsize;

        return (addr);
}

static void
kfreea(void *addr)
{
        size_t          size;

        if (!((uintptr_t)addr & PAGEOFFSET) && (size = getctgsz(addr))) {
                contig_free(addr, size);
        } else {
                size_t  *saddr = addr;
                if (saddr[-4] == 0)
                        vmem_free((vmem_t *)saddr[-3], (void *)saddr[-2],
                            saddr[-1]);
                else
                        kmem_cache_free((kmem_cache_t *)saddr[-4],
                            (void *)saddr[-2]);
        }
}

/*ARGSUSED*/
void
i_ddi_devacc_to_hatacc(ddi_device_acc_attr_t *devaccp, uint_t *hataccp)
{
}

/*
 * Check if the specified cache attribute is supported on the platform.
 * This function must be called before i_ddi_cacheattr_to_hatacc().
 */
boolean_t
i_ddi_check_cache_attr(uint_t flags)
{
        /*
         * The cache attributes are mutually exclusive. Any combination of
         * the attributes leads to a failure.
         */
        uint_t cache_attr = IOMEM_CACHE_ATTR(flags);
        if ((cache_attr != 0) && !ISP2(cache_attr))
                return (B_FALSE);

        /* All cache attributes are supported on X86/X64 */
        if (cache_attr & (IOMEM_DATA_UNCACHED | IOMEM_DATA_CACHED |
            IOMEM_DATA_UC_WR_COMBINE))
                return (B_TRUE);

        /* undefined attributes */
        return (B_FALSE);
}

/* set HAT cache attributes from the cache attributes */
void
i_ddi_cacheattr_to_hatacc(uint_t flags, uint_t *hataccp)
{
        uint_t cache_attr = IOMEM_CACHE_ATTR(flags);
        static char *fname = "i_ddi_cacheattr_to_hatacc";

        /*
         * If write-combining is not supported, then it falls back
         * to uncacheable.
         */
        if (cache_attr == IOMEM_DATA_UC_WR_COMBINE &&
            !is_x86_feature(x86_featureset, X86FSET_PAT))
                cache_attr = IOMEM_DATA_UNCACHED;

        /*
         * set HAT attrs according to the cache attrs.
         */
        switch (cache_attr) {
        case IOMEM_DATA_UNCACHED:
                *hataccp &= ~HAT_ORDER_MASK;
                *hataccp |= (HAT_STRICTORDER | HAT_PLAT_NOCACHE);
                break;
        case IOMEM_DATA_UC_WR_COMBINE:
                *hataccp &= ~HAT_ORDER_MASK;
                *hataccp |= (HAT_MERGING_OK | HAT_PLAT_NOCACHE);
                break;
        case IOMEM_DATA_CACHED:
                *hataccp &= ~HAT_ORDER_MASK;
                *hataccp |= HAT_UNORDERED_OK;
                break;
        /*
         * This case must not occur because the cache attribute is scrutinized
         * before this function is called.
         */
        default:
                /*
                 * set cacheable to hat attrs.
                 */
                *hataccp &= ~HAT_ORDER_MASK;
                *hataccp |= HAT_UNORDERED_OK;
                cmn_err(CE_WARN, "%s: cache_attr=0x%x is ignored.",
                    fname, cache_attr);
        }
}

/*
 * This should actually be called i_ddi_dma_mem_alloc. There should
 * also be an i_ddi_pio_mem_alloc. i_ddi_dma_mem_alloc should call
 * through the device tree with the DDI_CTLOPS_DMA_ALIGN ctl ops to
 * get alignment requirements for DMA memory. i_ddi_pio_mem_alloc
 * should use DDI_CTLOPS_PIO_ALIGN. Since we only have i_ddi_mem_alloc
 * so far which is used for both, DMA and PIO, we have to use the DMA
 * ctl ops to make everybody happy.
 */
/*ARGSUSED*/
int
i_ddi_mem_alloc(dev_info_t *dip, ddi_dma_attr_t *attr,
    size_t length, int cansleep, int flags,
    ddi_device_acc_attr_t *accattrp, caddr_t *kaddrp,
    size_t *real_length, ddi_acc_hdl_t *ap)
{
        caddr_t a;
        int iomin;
        ddi_acc_impl_t *iap;
        int physcontig = 0;
        pgcnt_t npages;
        pgcnt_t minctg;
        uint_t order;
        int e;

        /*
         * Check legality of arguments
         */
        if (length == 0 || kaddrp == NULL || attr == NULL) {
                return (DDI_FAILURE);
        }

        if (attr->dma_attr_minxfer == 0 || attr->dma_attr_align == 0 ||
            !ISP2(attr->dma_attr_align) || !ISP2(attr->dma_attr_minxfer)) {
                return (DDI_FAILURE);
        }

        /*
         * figure out most restrictive alignment requirement
         */
        iomin = attr->dma_attr_minxfer;
        iomin = maxbit(iomin, attr->dma_attr_align);
        if (iomin == 0)
                return (DDI_FAILURE);

        ASSERT((iomin & (iomin - 1)) == 0);

        /*
         * if we allocate memory with IOMEM_DATA_UNCACHED or
         * IOMEM_DATA_UC_WR_COMBINE, make sure we allocate a page aligned
         * memory that ends on a page boundry.
         * Don't want to have to different cache mappings to the same
         * physical page.
         */
        if (OVERRIDE_CACHE_ATTR(flags)) {
                iomin = (iomin + MMU_PAGEOFFSET) & MMU_PAGEMASK;
                length = (length + MMU_PAGEOFFSET) & (size_t)MMU_PAGEMASK;
        }

        /*
         * Determine if we need to satisfy the request for physically
         * contiguous memory or alignments larger than pagesize.
         */
        npages = btopr(length + attr->dma_attr_align);
        minctg = howmany(npages, attr->dma_attr_sgllen);

        if (minctg > 1) {
                uint64_t pfnseg = attr->dma_attr_seg >> PAGESHIFT;
                /*
                 * verify that the minimum contig requirement for the
                 * actual length does not cross segment boundary.
                 */
                length = P2ROUNDUP_TYPED(length, attr->dma_attr_minxfer,
                    size_t);
                npages = btopr(length);
                minctg = howmany(npages, attr->dma_attr_sgllen);
                if (minctg > pfnseg + 1)
                        return (DDI_FAILURE);
                physcontig = 1;
        } else {
                length = P2ROUNDUP_TYPED(length, iomin, size_t);
        }

        /*
         * Allocate the requested amount from the system.
         */
        a = kalloca(length, iomin, cansleep, physcontig, attr);

        if ((*kaddrp = a) == NULL)
                return (DDI_FAILURE);

        /*
         * if we to modify the cache attributes, go back and muck with the
         * mappings.
         */
        if (OVERRIDE_CACHE_ATTR(flags)) {
                order = 0;
                i_ddi_cacheattr_to_hatacc(flags, &order);
                e = kmem_override_cache_attrs(a, length, order);
                if (e != 0) {
                        kfreea(a);
                        return (DDI_FAILURE);
                }
        }

        if (real_length) {
                *real_length = length;
        }
        if (ap) {
                /*
                 * initialize access handle
                 */
                iap = (ddi_acc_impl_t *)ap->ah_platform_private;
                iap->ahi_acc_attr |= DDI_ACCATTR_CPU_VADDR;
                impl_acc_hdl_init(ap);
        }

        return (DDI_SUCCESS);
}

/* ARGSUSED */
void
i_ddi_mem_free(caddr_t kaddr, ddi_acc_hdl_t *ap)
{
        if (ap != NULL) {
                /*
                 * if we modified the cache attributes on alloc, go back and
                 * fix them since this memory could be returned to the
                 * general pool.
                 */
                if (OVERRIDE_CACHE_ATTR(ap->ah_xfermodes)) {
                        uint_t order = 0;
                        int e;
                        i_ddi_cacheattr_to_hatacc(IOMEM_DATA_CACHED, &order);
                        e = kmem_override_cache_attrs(kaddr, ap->ah_len, order);
                        if (e != 0) {
                                cmn_err(CE_WARN, "i_ddi_mem_free() failed to "
                                    "override cache attrs, memory leaked\n");
                                return;
                        }
                }
        }
        kfreea(kaddr);
}

/*
 * Access Barriers
 *
 */
/*ARGSUSED*/
int
i_ddi_ontrap(ddi_acc_handle_t hp)
{
        return (DDI_FAILURE);
}

/*ARGSUSED*/
void
i_ddi_notrap(ddi_acc_handle_t hp)
{
}


/*
 * Misc Functions
 */

/*
 * Implementation instance override functions
 *
 * No override on i86pc
 */
/*ARGSUSED*/
uint_t
impl_assign_instance(dev_info_t *dip)
{
        return ((uint_t)-1);
}

/*ARGSUSED*/
int
impl_keep_instance(dev_info_t *dip)
{

#if defined(__xpv)
        /*
         * Do not persist instance numbers assigned to devices in dom0
         */
        dev_info_t *pdip;
        if (DOMAIN_IS_INITDOMAIN(xen_info)) {
                if (((pdip = ddi_get_parent(dip)) != NULL) &&
                    (strcmp(ddi_get_name(pdip), "xpvd") == 0))
                        return (DDI_SUCCESS);
        }
#endif
        return (DDI_FAILURE);
}

/*ARGSUSED*/
int
impl_free_instance(dev_info_t *dip)
{
        return (DDI_FAILURE);
}

/*ARGSUSED*/
int
impl_check_cpu(dev_info_t *devi)
{
        return (DDI_SUCCESS);
}

/*
 * Referenced in common/cpr_driver.c: Power off machine.
 * Don't know how to power off i86pc.
 */
void
arch_power_down()
{}

/*
 * Copy name to property_name, since name
 * is in the low address range below kernelbase.
 */
static void
copy_boot_str(const char *boot_str, char *kern_str, int len)
{
        int i = 0;

        while (i < len - 1 && boot_str[i] != '\0') {
                kern_str[i] = boot_str[i];
                i++;
        }

        kern_str[i] = 0;        /* null terminate */
        if (boot_str[i] != '\0')
                cmn_err(CE_WARN,
                    "boot property string is truncated to %s", kern_str);
}

static void
get_boot_properties(void)
{
        extern char hw_provider[];
        dev_info_t *devi;
        char *name;
        int length;
        char property_name[50], property_val[50];
        void *bop_staging_area;

        bop_staging_area = kmem_zalloc(MMU_PAGESIZE, KM_NOSLEEP);

        /*
         * Import "root" properties from the boot.
         *
         * We do this by invoking BOP_NEXTPROP until the list
         * is completely copied in.
         */

        devi = ddi_root_node();
        for (name = BOP_NEXTPROP(bootops, "");          /* get first */
            name;                                       /* NULL => DONE */
            name = BOP_NEXTPROP(bootops, name)) {       /* get next */

                /* copy string to memory above kernelbase */
                copy_boot_str(name, property_name, 50);

                /*
                 * Skip vga properties. They will be picked up later
                 * by get_vga_properties.
                 */
                if (strcmp(property_name, "display-edif-block") == 0 ||
                    strcmp(property_name, "display-edif-id") == 0) {
                        continue;
                }

                length = BOP_GETPROPLEN(bootops, property_name);
                if (length == 0)
                        continue;
                if (length > MMU_PAGESIZE) {
                        cmn_err(CE_NOTE,
                            "boot property %s longer than 0x%x, ignored\n",
                            property_name, MMU_PAGESIZE);
                        continue;
                }
                BOP_GETPROP(bootops, property_name, bop_staging_area);

                /*
                 * special properties:
                 * si-machine, si-hw-provider
                 *      goes to kernel data structures.
                 * bios-boot-device and stdout
                 *      goes to hardware property list so it may show up
                 *      in the prtconf -vp output. This is needed by
                 *      Install/Upgrade. Once we fix install upgrade,
                 *      this can be taken out.
                 */
                if (strcmp(name, "si-machine") == 0) {
                        (void) strncpy(utsname.machine, bop_staging_area,
                            SYS_NMLN);
                        utsname.machine[SYS_NMLN - 1] = (char)NULL;
                } else if (strcmp(name, "si-hw-provider") == 0) {
                        (void) strncpy(hw_provider, bop_staging_area, SYS_NMLN);
                        hw_provider[SYS_NMLN - 1] = (char)NULL;
                } else if (strcmp(name, "bios-boot-device") == 0) {
                        copy_boot_str(bop_staging_area, property_val, 50);
                        (void) ndi_prop_update_string(DDI_DEV_T_NONE, devi,
                            property_name, property_val);
                } else if (strcmp(name, "acpi-root-tab") == 0) {
                        (void) ndi_prop_update_int64(DDI_DEV_T_NONE, devi,
                            property_name, *((int64_t *)bop_staging_area));
                } else if (strcmp(name, "smbios-address") == 0) {
                        (void) ndi_prop_update_int64(DDI_DEV_T_NONE, devi,
                            property_name, *((int64_t *)bop_staging_area));
                } else if (strcmp(name, "stdout") == 0) {
                        (void) ndi_prop_update_int(DDI_DEV_T_NONE, devi,
                            property_name, *((int *)bop_staging_area));
                } else if (strcmp(name, "boot-args") == 0) {
                        copy_boot_str(bop_staging_area, property_val, 50);
                        (void) e_ddi_prop_update_string(DDI_DEV_T_NONE, devi,
                            property_name, property_val);
                } else if (strcmp(name, "bootargs") == 0) {
                        copy_boot_str(bop_staging_area, property_val, 50);
                        (void) e_ddi_prop_update_string(DDI_DEV_T_NONE, devi,
                            property_name, property_val);
                } else if (strcmp(name, "bootp-response") == 0) {
                        (void) e_ddi_prop_update_byte_array(DDI_DEV_T_NONE,
                            devi, property_name, bop_staging_area, length);
                } else if (strcmp(name, "ramdisk_start") == 0) {
                        (void) e_ddi_prop_update_int64(DDI_DEV_T_NONE, devi,
                            property_name, *((int64_t *)bop_staging_area));
                } else if (strcmp(name, "ramdisk_end") == 0) {
                        (void) e_ddi_prop_update_int64(DDI_DEV_T_NONE, devi,
                            property_name, *((int64_t *)bop_staging_area));
                } else if (strncmp(name, "module-addr-", 12) == 0) {
                        (void) e_ddi_prop_update_int64(DDI_DEV_T_NONE, devi,
                            property_name, *((int64_t *)bop_staging_area));
                } else if (strncmp(name, "module-size-", 12) == 0) {
                        (void) e_ddi_prop_update_int64(DDI_DEV_T_NONE, devi,
                            property_name, *((int64_t *)bop_staging_area));
                } else {
                        /* Property type unknown, use old prop interface */
                        (void) e_ddi_prop_create(DDI_DEV_T_NONE, devi,
                            DDI_PROP_CANSLEEP, property_name, bop_staging_area,
                            length);
                }
        }

        kmem_free(bop_staging_area, MMU_PAGESIZE);
}

static void
get_vga_properties(void)
{
        dev_info_t *devi;
        major_t major;
        char *name;
        int length;
        char property_val[50];
        void *bop_staging_area;

        /*
         * XXXX Hack Allert!
         * There really needs to be a better way for identifying various
         * console framebuffers and their related issues.  Till then,
         * check for this one as a replacement to vgatext.
         */
        major = ddi_name_to_major("ragexl");
        if (major == (major_t)-1) {
                major = ddi_name_to_major("vgatext");
                if (major == (major_t)-1)
                        return;
        }
        devi = devnamesp[major].dn_head;
        if (devi == NULL)
                return;

        bop_staging_area = kmem_zalloc(MMU_PAGESIZE, KM_SLEEP);

        /*
         * Import "vga" properties from the boot.
         */
        name = "display-edif-block";
        length = BOP_GETPROPLEN(bootops, name);
        if (length > 0 && length < MMU_PAGESIZE) {
                BOP_GETPROP(bootops, name, bop_staging_area);
                (void) ndi_prop_update_byte_array(DDI_DEV_T_NONE,
                    devi, name, bop_staging_area, length);
        }

        /*
         * kdmconfig is also looking for display-type and
         * video-adapter-type. We default to color and svga.
         *
         * Could it be "monochrome", "vga"?
         * Nah, you've got to come to the 21st century...
         * And you can set monitor type manually in kdmconfig
         * if you are really an old junky.
         */
        (void) ndi_prop_update_string(DDI_DEV_T_NONE,
            devi, "display-type", "color");
        (void) ndi_prop_update_string(DDI_DEV_T_NONE,
            devi, "video-adapter-type", "svga");

        name = "display-edif-id";
        length = BOP_GETPROPLEN(bootops, name);
        if (length > 0 && length < MMU_PAGESIZE) {
                BOP_GETPROP(bootops, name, bop_staging_area);
                copy_boot_str(bop_staging_area, property_val, length);
                (void) ndi_prop_update_string(DDI_DEV_T_NONE,
                    devi, name, property_val);
        }

        kmem_free(bop_staging_area, MMU_PAGESIZE);
}


/*
 * This is temporary, but absolutely necessary.  If we are being
 * booted with a device tree created by the DevConf project's bootconf
 * program, then we have device information nodes that reflect
 * reality.  At this point in time in the Solaris release schedule, the
 * kernel drivers aren't prepared for reality.  They still depend on their
 * own ad-hoc interpretations of the properties created when their .conf
 * files were interpreted. These drivers use an "ignore-hardware-nodes"
 * property to prevent them from using the nodes passed up from the bootconf
 * device tree.
 *
 * Trying to assemble root file system drivers as we are booting from
 * devconf will fail if the kernel driver is basing its name_addr's on the
 * psuedo-node device info while the bootpath passed up from bootconf is using
 * reality-based name_addrs.  We help the boot along in this case by
 * looking at the pre-bootconf bootpath and determining if we would have
 * successfully matched if that had been the bootpath we had chosen.
 *
 * Note that we only even perform this extra check if we've booted
 * using bootconf's 1275 compliant bootpath, this is the boot device, and
 * we're trying to match the name_addr specified in the 1275 bootpath.
 */

#define MAXCOMPONENTLEN 32

int
x86_old_bootpath_name_addr_match(dev_info_t *cdip, char *caddr, char *naddr)
{
        /*
         *  There are multiple criteria to be met before we can even
         *  consider allowing a name_addr match here.
         *
         *  1) We must have been booted such that the bootconf program
         *      created device tree nodes and properties.  This can be
         *      determined by examining the 'bootpath' property.  This
         *      property will be a non-null string iff bootconf was
         *      involved in the boot.
         *
         *  2) The module that we want to match must be the boot device.
         *
         *  3) The instance of the module we are thinking of letting be
         *      our match must be ignoring hardware nodes.
         *
         *  4) The name_addr we want to match must be the name_addr
         *      specified in the 1275 bootpath.
         */
        static char bootdev_module[MAXCOMPONENTLEN];
        static char bootdev_oldmod[MAXCOMPONENTLEN];
        static char bootdev_newaddr[MAXCOMPONENTLEN];
        static char bootdev_oldaddr[MAXCOMPONENTLEN];
        static int  quickexit;

        char *daddr;
        int dlen;

        char    *lkupname;
        int     rv = DDI_FAILURE;

        if ((ddi_getlongprop(DDI_DEV_T_ANY, cdip, DDI_PROP_DONTPASS,
            "devconf-addr", (caddr_t)&daddr, &dlen) == DDI_PROP_SUCCESS) &&
            (ddi_getprop(DDI_DEV_T_ANY, cdip, DDI_PROP_DONTPASS,
            "ignore-hardware-nodes", -1) != -1)) {
                if (strcmp(daddr, caddr) == 0) {
                        return (DDI_SUCCESS);
                }
        }

        if (quickexit)
                return (rv);

        if (bootdev_module[0] == '\0') {
                char *addrp, *eoaddrp;
                char *busp, *modp, *atp;
                char *bp1275, *bp;
                int  bp1275len, bplen;

                bp1275 = bp = addrp = eoaddrp = busp = modp = atp = NULL;

                if (ddi_getlongprop(DDI_DEV_T_ANY,
                    ddi_root_node(), 0, "bootpath",
                    (caddr_t)&bp1275, &bp1275len) != DDI_PROP_SUCCESS ||
                    bp1275len <= 1) {
                        /*
                         * We didn't boot from bootconf so we never need to
                         * do any special matches.
                         */
                        quickexit = 1;
                        if (bp1275)
                                kmem_free(bp1275, bp1275len);
                        return (rv);
                }

                if (ddi_getlongprop(DDI_DEV_T_ANY,
                    ddi_root_node(), 0, "boot-path",
                    (caddr_t)&bp, &bplen) != DDI_PROP_SUCCESS || bplen <= 1) {
                        /*
                         * No fallback position for matching. This is
                         * certainly unexpected, but we'll handle it
                         * just in case.
                         */
                        quickexit = 1;
                        kmem_free(bp1275, bp1275len);
                        if (bp)
                                kmem_free(bp, bplen);
                        return (rv);
                }

                /*
                 *  Determine boot device module and 1275 name_addr
                 *
                 *  bootpath assumed to be of the form /bus/module@name_addr
                 */
                if (busp = strchr(bp1275, '/')) {
                        if (modp = strchr(busp + 1, '/')) {
                                if (atp = strchr(modp + 1, '@')) {
                                        *atp = '\0';
                                        addrp = atp + 1;
                                        if (eoaddrp = strchr(addrp, '/'))
                                                *eoaddrp = '\0';
                                }
                        }
                }

                if (modp && addrp) {
                        (void) strncpy(bootdev_module, modp + 1,
                            MAXCOMPONENTLEN);
                        bootdev_module[MAXCOMPONENTLEN - 1] = '\0';

                        (void) strncpy(bootdev_newaddr, addrp, MAXCOMPONENTLEN);
                        bootdev_newaddr[MAXCOMPONENTLEN - 1] = '\0';
                } else {
                        quickexit = 1;
                        kmem_free(bp1275, bp1275len);
                        kmem_free(bp, bplen);
                        return (rv);
                }

                /*
                 *  Determine fallback name_addr
                 *
                 *  10/3/96 - Also save fallback module name because it
                 *  might actually be different than the current module
                 *  name.  E.G., ISA pnp drivers have new names.
                 *
                 *  bootpath assumed to be of the form /bus/module@name_addr
                 */
                addrp = NULL;
                if (busp = strchr(bp, '/')) {
                        if (modp = strchr(busp + 1, '/')) {
                                if (atp = strchr(modp + 1, '@')) {
                                        *atp = '\0';
                                        addrp = atp + 1;
                                        if (eoaddrp = strchr(addrp, '/'))
                                                *eoaddrp = '\0';
                                }
                        }
                }

                if (modp && addrp) {
                        (void) strncpy(bootdev_oldmod, modp + 1,
                            MAXCOMPONENTLEN);
                        bootdev_module[MAXCOMPONENTLEN - 1] = '\0';

                        (void) strncpy(bootdev_oldaddr, addrp, MAXCOMPONENTLEN);
                        bootdev_oldaddr[MAXCOMPONENTLEN - 1] = '\0';
                }

                /* Free up the bootpath storage now that we're done with it. */
                kmem_free(bp1275, bp1275len);
                kmem_free(bp, bplen);

                if (bootdev_oldaddr[0] == '\0') {
                        quickexit = 1;
                        return (rv);
                }
        }

        if (((lkupname = ddi_get_name(cdip)) != NULL) &&
            (strcmp(bootdev_module, lkupname) == 0 ||
            strcmp(bootdev_oldmod, lkupname) == 0) &&
            ((ddi_getprop(DDI_DEV_T_ANY, cdip, DDI_PROP_DONTPASS,
            "ignore-hardware-nodes", -1) != -1) ||
            ignore_hardware_nodes) &&
            strcmp(bootdev_newaddr, caddr) == 0 &&
            strcmp(bootdev_oldaddr, naddr) == 0) {
                rv = DDI_SUCCESS;
        }

        return (rv);
}

/*
 * Perform a copy from a memory mapped device (whose devinfo pointer is devi)
 * separately mapped at devaddr in the kernel to a kernel buffer at kaddr.
 */
/*ARGSUSED*/
int
e_ddi_copyfromdev(dev_info_t *devi,
    off_t off, const void *devaddr, void *kaddr, size_t len)
{
        bcopy(devaddr, kaddr, len);
        return (0);
}

/*
 * Perform a copy to a memory mapped device (whose devinfo pointer is devi)
 * separately mapped at devaddr in the kernel from a kernel buffer at kaddr.
 */
/*ARGSUSED*/
int
e_ddi_copytodev(dev_info_t *devi,
    off_t off, const void *kaddr, void *devaddr, size_t len)
{
        bcopy(kaddr, devaddr, len);
        return (0);
}


static int
poke_mem(peekpoke_ctlops_t *in_args)
{
        int err = DDI_SUCCESS;
        on_trap_data_t otd;

        /* Set up protected environment. */
        if (!on_trap(&otd, OT_DATA_ACCESS)) {
                switch (in_args->size) {
                case sizeof (uint8_t):
                        *(uint8_t *)(in_args->dev_addr) =
                            *(uint8_t *)in_args->host_addr;
                        break;

                case sizeof (uint16_t):
                        *(uint16_t *)(in_args->dev_addr) =
                            *(uint16_t *)in_args->host_addr;
                        break;

                case sizeof (uint32_t):
                        *(uint32_t *)(in_args->dev_addr) =
                            *(uint32_t *)in_args->host_addr;
                        break;

                case sizeof (uint64_t):
                        *(uint64_t *)(in_args->dev_addr) =
                            *(uint64_t *)in_args->host_addr;
                        break;

                default:
                        err = DDI_FAILURE;
                        break;
                }
        } else
                err = DDI_FAILURE;

        /* Take down protected environment. */
        no_trap();

        return (err);
}


static int
peek_mem(peekpoke_ctlops_t *in_args)
{
        int err = DDI_SUCCESS;
        on_trap_data_t otd;

        if (!on_trap(&otd, OT_DATA_ACCESS)) {
                switch (in_args->size) {
                case sizeof (uint8_t):
                        *(uint8_t *)in_args->host_addr =
                            *(uint8_t *)in_args->dev_addr;
                        break;

                case sizeof (uint16_t):
                        *(uint16_t *)in_args->host_addr =
                            *(uint16_t *)in_args->dev_addr;
                        break;

                case sizeof (uint32_t):
                        *(uint32_t *)in_args->host_addr =
                            *(uint32_t *)in_args->dev_addr;
                        break;

                case sizeof (uint64_t):
                        *(uint64_t *)in_args->host_addr =
                            *(uint64_t *)in_args->dev_addr;
                        break;

                default:
                        err = DDI_FAILURE;
                        break;
                }
        } else
                err = DDI_FAILURE;

        no_trap();
        return (err);
}


/*
 * This is called only to process peek/poke when the DIP is NULL.
 * Assume that this is for memory, as nexi take care of device safe accesses.
 */
int
peekpoke_mem(ddi_ctl_enum_t cmd, peekpoke_ctlops_t *in_args)
{
        return (cmd == DDI_CTLOPS_PEEK ? peek_mem(in_args) : poke_mem(in_args));
}

/*
 * we've just done a cautious put/get. Check if it was successful by
 * calling pci_ereport_post() on all puts and for any gets that return -1
 */
static int
pci_peekpoke_check_fma(dev_info_t *dip, void *arg, ddi_ctl_enum_t ctlop,
    void (*scan)(dev_info_t *, ddi_fm_error_t *))
{
        int     rval = DDI_SUCCESS;
        peekpoke_ctlops_t *in_args = (peekpoke_ctlops_t *)arg;
        ddi_fm_error_t de;
        ddi_acc_impl_t *hp = (ddi_acc_impl_t *)in_args->handle;
        ddi_acc_hdl_t *hdlp = (ddi_acc_hdl_t *)in_args->handle;
        int check_err = 0;
        int repcount = in_args->repcount;

        if (ctlop == DDI_CTLOPS_POKE &&
            hdlp->ah_acc.devacc_attr_access != DDI_CAUTIOUS_ACC)
                return (DDI_SUCCESS);

        if (ctlop == DDI_CTLOPS_PEEK &&
            hdlp->ah_acc.devacc_attr_access != DDI_CAUTIOUS_ACC) {
                for (; repcount; repcount--) {
                        switch (in_args->size) {
                        case sizeof (uint8_t):
                                if (*(uint8_t *)in_args->host_addr == 0xff)
                                        check_err = 1;
                                break;
                        case sizeof (uint16_t):
                                if (*(uint16_t *)in_args->host_addr == 0xffff)
                                        check_err = 1;
                                break;
                        case sizeof (uint32_t):
                                if (*(uint32_t *)in_args->host_addr ==
                                    0xffffffff)
                                        check_err = 1;
                                break;
                        case sizeof (uint64_t):
                                if (*(uint64_t *)in_args->host_addr ==
                                    0xffffffffffffffff)
                                        check_err = 1;
                                break;
                        }
                }
                if (check_err == 0)
                        return (DDI_SUCCESS);
        }
        /*
         * for a cautious put or get or a non-cautious get that returned -1 call
         * io framework to see if there really was an error
         */
        bzero(&de, sizeof (ddi_fm_error_t));
        de.fme_version = DDI_FME_VERSION;
        de.fme_ena = fm_ena_generate(0, FM_ENA_FMT1);
        if (hdlp->ah_acc.devacc_attr_access == DDI_CAUTIOUS_ACC) {
                de.fme_flag = DDI_FM_ERR_EXPECTED;
                de.fme_acc_handle = in_args->handle;
        } else if (hdlp->ah_acc.devacc_attr_access == DDI_DEFAULT_ACC) {
                /*
                 * We only get here with DDI_DEFAULT_ACC for config space gets.
                 * Non-hardened drivers may be probing the hardware and
                 * expecting -1 returned. So need to treat errors on
                 * DDI_DEFAULT_ACC as DDI_FM_ERR_EXPECTED.
                 */
                de.fme_flag = DDI_FM_ERR_EXPECTED;
                de.fme_acc_handle = in_args->handle;
        } else {
                /*
                 * Hardened driver doing protected accesses shouldn't
                 * get errors unless there's a hardware problem. Treat
                 * as nonfatal if there's an error, but set UNEXPECTED
                 * so we raise ereports on any errors and potentially
                 * fault the device
                 */
                de.fme_flag = DDI_FM_ERR_UNEXPECTED;
        }
        (void) scan(dip, &de);
        if (hdlp->ah_acc.devacc_attr_access != DDI_DEFAULT_ACC &&
            de.fme_status != DDI_FM_OK) {
                ndi_err_t *errp = (ndi_err_t *)hp->ahi_err;
                rval = DDI_FAILURE;
                errp->err_ena = de.fme_ena;
                errp->err_expected = de.fme_flag;
                errp->err_status = DDI_FM_NONFATAL;
        }
        return (rval);
}

/*
 * pci_peekpoke_check_nofma() is for when an error occurs on a register access
 * during pci_ereport_post(). We can't call pci_ereport_post() again or we'd
 * recurse, so assume all puts are OK and gets have failed if they return -1
 */
static int
pci_peekpoke_check_nofma(void *arg, ddi_ctl_enum_t ctlop)
{
        int rval = DDI_SUCCESS;
        peekpoke_ctlops_t *in_args = (peekpoke_ctlops_t *)arg;
        ddi_acc_impl_t *hp = (ddi_acc_impl_t *)in_args->handle;
        ddi_acc_hdl_t *hdlp = (ddi_acc_hdl_t *)in_args->handle;
        int repcount = in_args->repcount;

        if (ctlop == DDI_CTLOPS_POKE)
                return (rval);

        for (; repcount; repcount--) {
                switch (in_args->size) {
                case sizeof (uint8_t):
                        if (*(uint8_t *)in_args->host_addr == 0xff)
                                rval = DDI_FAILURE;
                        break;
                case sizeof (uint16_t):
                        if (*(uint16_t *)in_args->host_addr == 0xffff)
                                rval = DDI_FAILURE;
                        break;
                case sizeof (uint32_t):
                        if (*(uint32_t *)in_args->host_addr == 0xffffffff)
                                rval = DDI_FAILURE;
                        break;
                case sizeof (uint64_t):
                        if (*(uint64_t *)in_args->host_addr ==
                            0xffffffffffffffff)
                                rval = DDI_FAILURE;
                        break;
                }
        }
        if (hdlp->ah_acc.devacc_attr_access != DDI_DEFAULT_ACC &&
            rval == DDI_FAILURE) {
                ndi_err_t *errp = (ndi_err_t *)hp->ahi_err;
                errp->err_ena = fm_ena_generate(0, FM_ENA_FMT1);
                errp->err_expected = DDI_FM_ERR_UNEXPECTED;
                errp->err_status = DDI_FM_NONFATAL;
        }
        return (rval);
}

int
pci_peekpoke_check(dev_info_t *dip, dev_info_t *rdip,
    ddi_ctl_enum_t ctlop, void *arg, void *result,
    int (*handler)(dev_info_t *, dev_info_t *, ddi_ctl_enum_t, void *,
    void *), kmutex_t *err_mutexp, kmutex_t *peek_poke_mutexp,
    void (*scan)(dev_info_t *, ddi_fm_error_t *))
{
        int rval;
        peekpoke_ctlops_t *in_args = (peekpoke_ctlops_t *)arg;
        ddi_acc_impl_t *hp = (ddi_acc_impl_t *)in_args->handle;

        /*
         * this function only supports cautious accesses, not peeks/pokes
         * which don't have a handle
         */
        if (hp == NULL)
                return (DDI_FAILURE);

        if (hp->ahi_acc_attr & DDI_ACCATTR_CONFIG_SPACE) {
                if (!mutex_tryenter(err_mutexp)) {
                        /*
                         * As this may be a recursive call from within
                         * pci_ereport_post() we can't wait for the mutexes.
                         * Fortunately we know someone is already calling
                         * pci_ereport_post() which will handle the error bits
                         * for us, and as this is a config space access we can
                         * just do the access and check return value for -1
                         * using pci_peekpoke_check_nofma().
                         */
                        rval = handler(dip, rdip, ctlop, arg, result);
                        if (rval == DDI_SUCCESS)
                                rval = pci_peekpoke_check_nofma(arg, ctlop);
                        return (rval);
                }
                /*
                 * This can't be a recursive call. Drop the err_mutex and get
                 * both mutexes in the right order. If an error hasn't already
                 * been detected by the ontrap code, use pci_peekpoke_check_fma
                 * which will call pci_ereport_post() to check error status.
                 */
                mutex_exit(err_mutexp);
        }
        mutex_enter(peek_poke_mutexp);
        rval = handler(dip, rdip, ctlop, arg, result);
        if (rval == DDI_SUCCESS) {
                mutex_enter(err_mutexp);
                rval = pci_peekpoke_check_fma(dip, arg, ctlop, scan);
                mutex_exit(err_mutexp);
        }
        mutex_exit(peek_poke_mutexp);
        return (rval);
}

void
impl_setup_ddi(void)
{
#if !defined(__xpv)
        extern void startup_bios_disk(void);
        extern int post_fastreboot;
#endif
        dev_info_t *xdip, *isa_dip;
        rd_existing_t rd_mem_prop;
        int err;

        ndi_devi_alloc_sleep(ddi_root_node(), "ramdisk",
            (pnode_t)DEVI_SID_NODEID, &xdip);

        (void) BOP_GETPROP(bootops,
            "ramdisk_start", (void *)&ramdisk_start);
        (void) BOP_GETPROP(bootops,
            "ramdisk_end", (void *)&ramdisk_end);

#ifdef __xpv
        ramdisk_start -= ONE_GIG;
        ramdisk_end -= ONE_GIG;
#endif
        rd_mem_prop.phys = ramdisk_start;
        rd_mem_prop.size = ramdisk_end - ramdisk_start + 1;

        (void) ndi_prop_update_byte_array(DDI_DEV_T_NONE, xdip,
            RD_EXISTING_PROP_NAME, (uchar_t *)&rd_mem_prop,
            sizeof (rd_mem_prop));
        err = ndi_devi_bind_driver(xdip, 0);
        ASSERT(err == 0);

        /* isa node */
        if (pseudo_isa) {
                ndi_devi_alloc_sleep(ddi_root_node(), "isa",
                    (pnode_t)DEVI_SID_NODEID, &isa_dip);
                (void) ndi_prop_update_string(DDI_DEV_T_NONE, isa_dip,
                    "device_type", "isa");
                (void) ndi_prop_update_string(DDI_DEV_T_NONE, isa_dip,
                    "bus-type", "isa");
                (void) ndi_devi_bind_driver(isa_dip, 0);
        }

        /*
         * Read in the properties from the boot.
         */
        get_boot_properties();

        /* not framebuffer should be enumerated, if present */
        get_vga_properties();

        /*
         * Check for administratively disabled drivers.
         */
        check_driver_disable();

#if !defined(__xpv)
        if (!post_fastreboot)
                startup_bios_disk();
#endif
        /* do bus dependent probes. */
        impl_bus_initialprobe();
}

dev_t
getrootdev(void)
{
        /*
         * Usually rootfs.bo_name is initialized by the
         * the bootpath property from bootenv.rc, but
         * defaults to "/ramdisk:a" otherwise.
         */
        return (ddi_pathname_to_dev_t(rootfs.bo_name));
}

static struct bus_probe {
        struct bus_probe *next;
        void (*probe)(int);
} *bus_probes;

void
impl_bus_add_probe(void (*func)(int))
{
        struct bus_probe *probe;
        struct bus_probe *lastprobe = NULL;

        probe = kmem_alloc(sizeof (*probe), KM_SLEEP);
        probe->probe = func;
        probe->next = NULL;

        if (!bus_probes) {
                bus_probes = probe;
                return;
        }

        lastprobe = bus_probes;
        while (lastprobe->next)
                lastprobe = lastprobe->next;
        lastprobe->next = probe;
}

/*ARGSUSED*/
void
impl_bus_delete_probe(void (*func)(int))
{
        struct bus_probe *prev = NULL;
        struct bus_probe *probe = bus_probes;

        while (probe) {
                if (probe->probe == func)
                        break;
                prev = probe;
                probe = probe->next;
        }

        if (probe == NULL)
                return;

        if (prev)
                prev->next = probe->next;
        else
                bus_probes = probe->next;

        kmem_free(probe, sizeof (struct bus_probe));
}

/*
 * impl_bus_initialprobe
 *      Modload the prom simulator, then let it probe to verify existence
 *      and type of PCI support.
 */
static void
impl_bus_initialprobe(void)
{
        struct bus_probe *probe;

        /* load modules to install bus probes */
#if defined(__xpv)
        if (DOMAIN_IS_INITDOMAIN(xen_info)) {
                if (modload("misc", "pci_autoconfig") < 0) {
                        panic("failed to load misc/pci_autoconfig");
                }

                if (modload("drv", "isa") < 0)
                        panic("failed to load drv/isa");
        }

        (void) modload("misc", "xpv_autoconfig");
#else
        if (modload("misc", "pci_autoconfig") < 0) {
                panic("failed to load misc/pci_autoconfig");
        }

        (void) modload("misc", "acpidev");

        if (modload("drv", "isa") < 0)
                panic("failed to load drv/isa");
#endif

        probe = bus_probes;
        while (probe) {
                /* run the probe functions */
                (*probe->probe)(0);
                probe = probe->next;
        }
}

/*
 * impl_bus_reprobe
 *      Reprogram devices not set up by firmware.
 */
static void
impl_bus_reprobe(void)
{
        struct bus_probe *probe;

        probe = bus_probes;
        while (probe) {
                /* run the probe function */
                (*probe->probe)(1);
                probe = probe->next;
        }
}


/*
 * The following functions ready a cautious request to go up to the nexus
 * driver.  It is up to the nexus driver to decide how to process the request.
 * It may choose to call i_ddi_do_caut_get/put in this file, or do it
 * differently.
 */

static void
i_ddi_caut_getput_ctlops(ddi_acc_impl_t *hp, uint64_t host_addr,
    uint64_t dev_addr, size_t size, size_t repcount, uint_t flags,
    ddi_ctl_enum_t cmd)
{
        peekpoke_ctlops_t       cautacc_ctlops_arg;

        cautacc_ctlops_arg.size = size;
        cautacc_ctlops_arg.dev_addr = dev_addr;
        cautacc_ctlops_arg.host_addr = host_addr;
        cautacc_ctlops_arg.handle = (ddi_acc_handle_t)hp;
        cautacc_ctlops_arg.repcount = repcount;
        cautacc_ctlops_arg.flags = flags;

        (void) ddi_ctlops(hp->ahi_common.ah_dip, hp->ahi_common.ah_dip, cmd,
            &cautacc_ctlops_arg, NULL);
}

uint8_t
i_ddi_caut_get8(ddi_acc_impl_t *hp, uint8_t *addr)
{
        uint8_t value;
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)&value, (uintptr_t)addr,
            sizeof (uint8_t), 1, 0, DDI_CTLOPS_PEEK);

        return (value);
}

uint16_t
i_ddi_caut_get16(ddi_acc_impl_t *hp, uint16_t *addr)
{
        uint16_t value;
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)&value, (uintptr_t)addr,
            sizeof (uint16_t), 1, 0, DDI_CTLOPS_PEEK);

        return (value);
}

uint32_t
i_ddi_caut_get32(ddi_acc_impl_t *hp, uint32_t *addr)
{
        uint32_t value;
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)&value, (uintptr_t)addr,
            sizeof (uint32_t), 1, 0, DDI_CTLOPS_PEEK);

        return (value);
}

uint64_t
i_ddi_caut_get64(ddi_acc_impl_t *hp, uint64_t *addr)
{
        uint64_t value;
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)&value, (uintptr_t)addr,
            sizeof (uint64_t), 1, 0, DDI_CTLOPS_PEEK);

        return (value);
}

void
i_ddi_caut_put8(ddi_acc_impl_t *hp, uint8_t *addr, uint8_t value)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)&value, (uintptr_t)addr,
            sizeof (uint8_t), 1, 0, DDI_CTLOPS_POKE);
}

void
i_ddi_caut_put16(ddi_acc_impl_t *hp, uint16_t *addr, uint16_t value)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)&value, (uintptr_t)addr,
            sizeof (uint16_t), 1, 0, DDI_CTLOPS_POKE);
}

void
i_ddi_caut_put32(ddi_acc_impl_t *hp, uint32_t *addr, uint32_t value)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)&value, (uintptr_t)addr,
            sizeof (uint32_t), 1, 0, DDI_CTLOPS_POKE);
}

void
i_ddi_caut_put64(ddi_acc_impl_t *hp, uint64_t *addr, uint64_t value)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)&value, (uintptr_t)addr,
            sizeof (uint64_t), 1, 0, DDI_CTLOPS_POKE);
}

void
i_ddi_caut_rep_get8(ddi_acc_impl_t *hp, uint8_t *host_addr, uint8_t *dev_addr,
    size_t repcount, uint_t flags)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)host_addr, (uintptr_t)dev_addr,
            sizeof (uint8_t), repcount, flags, DDI_CTLOPS_PEEK);
}

void
i_ddi_caut_rep_get16(ddi_acc_impl_t *hp, uint16_t *host_addr,
    uint16_t *dev_addr, size_t repcount, uint_t flags)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)host_addr, (uintptr_t)dev_addr,
            sizeof (uint16_t), repcount, flags, DDI_CTLOPS_PEEK);
}

void
i_ddi_caut_rep_get32(ddi_acc_impl_t *hp, uint32_t *host_addr,
    uint32_t *dev_addr, size_t repcount, uint_t flags)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)host_addr, (uintptr_t)dev_addr,
            sizeof (uint32_t), repcount, flags, DDI_CTLOPS_PEEK);
}

void
i_ddi_caut_rep_get64(ddi_acc_impl_t *hp, uint64_t *host_addr,
    uint64_t *dev_addr, size_t repcount, uint_t flags)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)host_addr, (uintptr_t)dev_addr,
            sizeof (uint64_t), repcount, flags, DDI_CTLOPS_PEEK);
}

void
i_ddi_caut_rep_put8(ddi_acc_impl_t *hp, uint8_t *host_addr, uint8_t *dev_addr,
    size_t repcount, uint_t flags)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)host_addr, (uintptr_t)dev_addr,
            sizeof (uint8_t), repcount, flags, DDI_CTLOPS_POKE);
}

void
i_ddi_caut_rep_put16(ddi_acc_impl_t *hp, uint16_t *host_addr,
    uint16_t *dev_addr, size_t repcount, uint_t flags)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)host_addr, (uintptr_t)dev_addr,
            sizeof (uint16_t), repcount, flags, DDI_CTLOPS_POKE);
}

void
i_ddi_caut_rep_put32(ddi_acc_impl_t *hp, uint32_t *host_addr,
    uint32_t *dev_addr, size_t repcount, uint_t flags)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)host_addr, (uintptr_t)dev_addr,
            sizeof (uint32_t), repcount, flags, DDI_CTLOPS_POKE);
}

void
i_ddi_caut_rep_put64(ddi_acc_impl_t *hp, uint64_t *host_addr,
    uint64_t *dev_addr, size_t repcount, uint_t flags)
{
        i_ddi_caut_getput_ctlops(hp, (uintptr_t)host_addr, (uintptr_t)dev_addr,
            sizeof (uint64_t), repcount, flags, DDI_CTLOPS_POKE);
}

boolean_t
i_ddi_copybuf_required(ddi_dma_attr_t *attrp)
{
        uint64_t hi_pa;

        hi_pa = ((uint64_t)physmax + 1ull) << PAGESHIFT;
        if (attrp->dma_attr_addr_hi < hi_pa) {
                return (B_TRUE);
        }

        return (B_FALSE);
}

size_t
i_ddi_copybuf_size()
{
        return (dma_max_copybuf_size);
}

/*
 * i_ddi_dma_max()
 *    returns the maximum DMA size which can be performed in a single DMA
 *    window taking into account the devices DMA contraints (attrp), the
 *    maximum copy buffer size (if applicable), and the worse case buffer
 *    fragmentation.
 */
/*ARGSUSED*/
uint32_t
i_ddi_dma_max(dev_info_t *dip, ddi_dma_attr_t *attrp)
{
        uint64_t maxxfer;


        /*
         * take the min of maxxfer and the the worse case fragementation
         * (e.g. every cookie <= 1 page)
         */
        maxxfer = MIN(attrp->dma_attr_maxxfer,
            ((uint64_t)(attrp->dma_attr_sgllen - 1) << PAGESHIFT));

        /*
         * If the DMA engine can't reach all off memory, we also need to take
         * the max size of the copybuf into consideration.
         */
        if (i_ddi_copybuf_required(attrp)) {
                maxxfer = MIN(i_ddi_copybuf_size(), maxxfer);
        }

        /*
         * we only return a 32-bit value. Make sure it's not -1. Round to a
         * page so it won't be mistaken for an error value during debug.
         */
        if (maxxfer >= 0xFFFFFFFF) {
                maxxfer = 0xFFFFF000;
        }

        /*
         * make sure the value we return is a whole multiple of the
         * granlarity.
         */
        if (attrp->dma_attr_granular > 1) {
                maxxfer = maxxfer - (maxxfer % attrp->dma_attr_granular);
        }

        return ((uint32_t)maxxfer);
}

/*ARGSUSED*/
void
translate_devid(dev_info_t *dip)
{
}

pfn_t
i_ddi_paddr_to_pfn(paddr_t paddr)
{
        pfn_t pfn;

#ifdef __xpv
        if (DOMAIN_IS_INITDOMAIN(xen_info)) {
                pfn = xen_assign_pfn(mmu_btop(paddr));
        } else {
                pfn = mmu_btop(paddr);
        }
#else
        pfn = mmu_btop(paddr);
#endif

        return (pfn);
}