/* Copyright 2017 NXP Semiconductor, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of NXP Semiconductor nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * ALTERNATIVELY, this software may be distributed under the terms of the * GNU General Public License ("GPL") as published by the Free Software * Foundation, either version 2 of that License or (at your option) any * later version. * * THIS SOFTWARE IS PROVIDED BY NXP Semiconductor ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NXP Semiconductor BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* * Initialize a devices private memory region
*/ int qbman_init_private_mem(struct device *dev, int idx, constchar *compat,
dma_addr_t *addr, size_t *size)
{ struct device_node *mem_node; struct reserved_mem *rmem; int err;
__be32 *res_array;
mem_node = of_parse_phandle(dev->of_node, "memory-region", idx); if (!mem_node) {
mem_node = of_find_compatible_node(NULL, NULL, compat); if (!mem_node) {
dev_err(dev, "No memory-region found for index %d or compatible '%s'\n",
idx, compat); return -ENODEV;
}
}
rmem = of_reserved_mem_lookup(mem_node); if (!rmem) {
dev_err(dev, "of_reserved_mem_lookup() returned NULL\n"); return -ENODEV;
}
*addr = rmem->base;
*size = rmem->size;
/* * Check if the reg property exists - if not insert the node * so upon kexec() the same memory region address will be preserved. * This is needed because QBMan HW does not allow the base address/ * size to be modified once set.
*/ if (!of_property_present(mem_node, "reg")) { struct property *prop;
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.