resource_table.h

#ifndef _RSC_TABLE_PRU_H_
#define _RSC_TABLE_PRU_H_

#include <stddef.h> //needed for offset_of
#include <rsc_types.h> 
#include "pru_virtio_ids.h"

#define PRU_RPMSG_VQ0_SIZE	16
#define PRU_RPMSG_VQ1_SIZE	16
#define VIRTIO_RPMSG_F_NS	0
#define RPMSG_PRU_C0_FEATURES	(1 << VIRTIO_RPMSG_F_NS)
#define HOST_UNUSED		255

#ifdef PRU0
#define TO_ARM_HOST			16
#define FROM_ARM_HOST			17
#define PRU0_TO_ARM_CHANNEL  2
#define PRU0_FROM_ARM_CHANNEL 0
#define PRU1_TO_ARM_CHANNEL  HOST_UNUSED
#define PRU1_FROM_ARM_CHANNEL HOST_UNUSED
#define HOST_INT			0x40000000
#define CHAN_NAME			"rpmsg-pru"
#define CHAN_DESC			"Channel 30"
#define CHAN_PORT			30
#define TO_ARM_CHANNEL PRU0_TO_ARM_CHANNEL
#define FROM_ARM_CHANNEL PRU0_FROM_ARM_CHANNEL
#endif
#ifdef PRU1
#define TO_ARM_HOST			18
#define FROM_ARM_HOST			19
#define PRU1_TO_ARM_CHANNEL  3
#define PRU1_FROM_ARM_CHANNEL 1
#define PRU0_TO_ARM_CHANNEL  HOST_UNUSED
#define PRU0_FROM_ARM_CHANNEL HOST_UNUSED
#define HOST_INT			0x80000000
#define CHAN_NAME			"rpmsg-pru"
#define CHAN_DESC			"Channel 31"
#define CHAN_PORT			31
#define TO_ARM_CHANNEL PRU1_TO_ARM_CHANNEL
#define FROM_ARM_CHANNEL PRU1_FROM_ARM_CHANNEL
#endif

struct ch_map pru_intc_map[] = { {TO_ARM_HOST, TO_ARM_CHANNEL},
				 {FROM_ARM_HOST, FROM_ARM_CHANNEL},
};

struct my_resource_table {
	struct resource_table base;
	uint32_t offset[2];
	struct fw_rsc_vdev rpmsg_vdev;
	struct fw_rsc_vdev_vring rpmsg_vring0;
	struct fw_rsc_vdev_vring rpmsg_vring1;
	struct fw_rsc_custom pru_ints;
};

#pragma DATA_SECTION(resourceTable, ".resource_table")
#pragma RETAIN(resourceTable)
struct my_resource_table resourceTable = {
	1,	/* Resource table version: only version 1 is supported by the current driver */
	2,	/* number of entries in the table */
	0, 0,	/* reserved, must be zero */
	{
		offsetof(struct my_resource_table, rpmsg_vdev),
		offsetof(struct my_resource_table, pru_ints),
	},

	{
		(unsigned)TYPE_VDEV,                    //type
		(unsigned)VIRTIO_ID_RPMSG,              //id
		(unsigned)0,                            //notifyid
		(unsigned)RPMSG_PRU_C0_FEATURES,	//dfeatures
		(unsigned)0,                            //gfeatures
		(unsigned)0,                            //config_len
		(unsigned char)0,                             //status
		(unsigned char)2,                             //num_of_vrings, only two is supported
		{ (unsigned char)0, (unsigned char)0 },             //reserved
	},
	{
		0,                      //da, will be populated by host, can't pass it in
		16,                     //align (bytes),
		PRU_RPMSG_VQ0_SIZE,     //num of descriptors
		0,                      //notifyid, will be populated, can't pass right now
		0                       //reserved
	},
	{
		0,                      //da, will be populated by host, can't pass it in
		16,                     //align (bytes),
		PRU_RPMSG_VQ1_SIZE,     //num of descriptors
		0,                      //notifyid, will be populated, can't pass right now
		0                       //reserved
	},

	{
		TYPE_CUSTOM, TYPE_PRU_INTS,
		sizeof(struct fw_rsc_custom_ints),
		{
			0x0000,
			PRU0_FROM_ARM_CHANNEL, PRU1_FROM_ARM_CHANNEL, PRU0_TO_ARM_CHANNEL, PRU1_TO_ARM_CHANNEL, HOST_UNUSED,
			HOST_UNUSED, HOST_UNUSED, HOST_UNUSED, HOST_UNUSED, HOST_UNUSED,
			(sizeof(pru_intc_map) / sizeof(struct ch_map)),
			pru_intc_map,
		},
	},
};

#endif