rsc_table.c

/*
 * Copyright (c) 2014, Mentor Graphics Corporation
 * All rights reserved.
 * Copyright (c) 2015 Xilinx, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of Mentor Graphics Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
 */

/* This file populates resource table for BM remote
 * for use by the Linux Master */

#include "openamp/open_amp.h"
#include "rsc_table.h"

/* Place resource table in special ELF section */
#define __section_t(S)          __attribute__((__section__(#S)))
#define __resource              __section_t(.resource_table)

#define RPMSG_IPU_C0_FEATURES        1

/* VirtIO rpmsg device id */
#define VIRTIO_ID_RPMSG_             7

/* Remote supports Name Service announcement */
#define VIRTIO_RPMSG_F_NS           0

#define NUM_VRINGS                  0x02
#define VRING_ALIGN                 0x1000
#define RING_TX                     0x3ED40000
#define RING_RX                     0x3ED44000
#define VRING_SIZE                  256

#define NUM_TABLE_ENTRIES           1

struct remote_resource_table __resource resources = {
	/* Version */
	1,

	/* NUmber of table entries */
	NUM_TABLE_ENTRIES,
	/* reserved fields */
	{0, 0,},

	/* Offsets of rsc entries */
	{
	 offsetof(struct remote_resource_table, rpmsg_vdev),
	 },

	    /* Virtio device entry */
	{RSC_VDEV, VIRTIO_ID_RPMSG_, 0, RPMSG_IPU_C0_FEATURES, 0, 0, 0,
	 NUM_VRINGS, {0, 0},
	 },

	/* Vring rsc entry - part of vdev rsc entry */
	{
	 RING_TX, VRING_ALIGN, VRING_SIZE, 1, 0},
	{
	 RING_RX, VRING_ALIGN, VRING_SIZE, 2, 0},
};

void *get_resource_table (int rsc_id, int *len)
{
	(void) rsc_id;
	*len = sizeof(resources);
	return &resources;
}