efcode/fcdriver/property.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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) 2000 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <strings.h>

#include <fcode/private.h>
#include <fcode/log.h>

#include <fcdriver/fcdriver.h>


static char *prop_buf;

static int
getproplen(common_data_t *cdp, fc_phandle_t node, char *propname, int inherit)
{
    fc_cell_t len;
    char *service;
    int error;

    service = inherit ? FC_GET_IN_PROPLEN : FC_GET_PKG_PROPLEN;

    error = fc_run_priv(cdp, service, 2, 1, fc_phandle2cell(node),
        fc_ptr2cell(propname), &len);
    if (error)
        return (-1);

    return (fc_cell2int(len));
}

static int
getprop(common_data_t *cdp, fc_phandle_t node, char *propname, char *buf,
    int inherit)
{
    fc_cell_t len;
    char *service;
    int error;

    service = inherit ? FC_GET_IN_PROP : FC_GET_PKG_PROP;

    error = fc_run_priv(cdp, service, 3, 1, fc_phandle2cell(node),
        fc_ptr2cell(buf), fc_ptr2cell(propname), &len);
    if (error)
        return (-1);

    return (fc_cell2int(len));
}

int
os_get_prop_common(common_data_t *cdp, fc_phandle_t node, char *name,
    int inherit, char **buf, int *len)
{
    int i, j;
    char *bp;

    i = getproplen(cdp, node, name, inherit);
    if (i <= 0) {
        /*
         * OK for properties to be undefined, suppress error message
         * unless some debug is on.
         */
        if (get_interpreter_debug_level())
            log_message(MSG_ERROR, "os_get_prop_common:"
                " getproplen(%s) returned %d\n", name, i);
        return (-1);
    }
    bp = MALLOC(i);

    j = getprop(cdp, node, name, bp, inherit);
    if (i != j) {
        /*
         * It's an error if getproplen succeeded but getprop didn't
         * return a matching length.
         */
        log_message(MSG_ERROR, "os_get_prop_common: getprop(%s)"
            " return %d, getproplen returned %d\n", name, j, i);
        FREE(bp);
        return (-2);
    }
    memcpy(prop_buf, bp, i);
    *buf = prop_buf;
    *len = i;
    FREE(bp);
    return (0);
}

static void
os_get_prop(fcode_env_t *env, int inherit, device_t *dev)
{
    fc_phandle_t node;
    char *name;
    char *prop;
    int len;
    private_data_t *pd;

    ASSERT(dev);

    pd = dev->private;
    ASSERT(pd);

    name = pop_a_string(env, &len);

    node = pd->node;
    if (node == NULL) {
        log_message(MSG_ERROR, "os_get_prop: NULL node: %s\n",
            get_path(env, dev));
        PUSH(DS, TRUE);
    } else if (os_get_prop_common(pd->common, node, name, inherit, &prop,
        &len)) {
        PUSH(DS, TRUE);
    } else {
        PUSH(DS, (fstack_t)prop);
        PUSH(DS, len);
        PUSH(DS, FALSE);
    }
}

static void
os_get_package_prop(fcode_env_t *env)
{
    device_t *dev;

    CONVERT_PHANDLE(env, dev, POP(DS));
    os_get_prop(env, 0, dev);
}

static void
os_get_inherited_prop(fcode_env_t *env)
{
    os_get_prop(env, 1, env->attachment_pt);
}

void
install_property_vectors(fcode_env_t *env, device_t *d)
{
    d->vectors.get_package_prop = os_get_package_prop;
    d->vectors.get_inherited_prop = os_get_inherited_prop;
}

#pragma init(_init)

static void
_init(void)
{
    fcode_env_t *env = initial_env;

    ASSERT(env);
    NOTICE;

    prop_buf = MALLOC(4096);

}