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Filename : epapr_hcalls.h
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/* SPDX-License-Identifier: ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) */
/*
 * ePAPR hcall interface
 *
 * Copyright 2008-2011 Freescale Semiconductor, Inc.
 *
 * Author: Timur Tabi <timur@freescale.com>
 *
 * This file is provided under a dual BSD/GPL license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * 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 Freescale 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 Freescale 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 Freescale 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.
 */

#ifndef _ASM_POWERPC_EPAPR_HCALLS_H
#define _ASM_POWERPC_EPAPR_HCALLS_H

#define EV_BYTE_CHANNEL_SEND		1
#define EV_BYTE_CHANNEL_RECEIVE		2
#define EV_BYTE_CHANNEL_POLL		3
#define EV_INT_SET_CONFIG		4
#define EV_INT_GET_CONFIG		5
#define EV_INT_SET_MASK			6
#define EV_INT_GET_MASK			7
#define EV_INT_IACK			9
#define EV_INT_EOI			10
#define EV_INT_SEND_IPI			11
#define EV_INT_SET_TASK_PRIORITY	12
#define EV_INT_GET_TASK_PRIORITY	13
#define EV_DOORBELL_SEND		14
#define EV_MSGSND			15
#define EV_IDLE				16

/* vendor ID: epapr */
#define EV_LOCAL_VENDOR_ID		0	/* for private use */
#define EV_EPAPR_VENDOR_ID		1
#define EV_FSL_VENDOR_ID		2	/* Freescale Semiconductor */
#define EV_IBM_VENDOR_ID		3	/* IBM */
#define EV_GHS_VENDOR_ID		4	/* Green Hills Software */
#define EV_ENEA_VENDOR_ID		5	/* Enea */
#define EV_WR_VENDOR_ID			6	/* Wind River Systems */
#define EV_AMCC_VENDOR_ID		7	/* Applied Micro Circuits */
#define EV_KVM_VENDOR_ID		42	/* KVM */

/* The max number of bytes that a byte channel can send or receive per call */
#define EV_BYTE_CHANNEL_MAX_BYTES	16


#define _EV_HCALL_TOKEN(id, num) (((id) << 16) | (num))
#define EV_HCALL_TOKEN(hcall_num) _EV_HCALL_TOKEN(EV_EPAPR_VENDOR_ID, hcall_num)

/* epapr return codes */
#define EV_SUCCESS		0
#define EV_EPERM		1	/* Operation not permitted */
#define EV_ENOENT		2	/*  Entry Not Found */
#define EV_EIO			3	/* I/O error occurred */
#define EV_EAGAIN		4	/* The operation had insufficient
					 * resources to complete and should be
					 * retried
					 */
#define EV_ENOMEM		5	/* There was insufficient memory to
					 * complete the operation */
#define EV_EFAULT		6	/* Bad guest address */
#define EV_ENODEV		7	/* No such device */
#define EV_EINVAL		8	/* An argument supplied to the hcall
					   was out of range or invalid */
#define EV_INTERNAL		9	/* An internal error occurred */
#define EV_CONFIG		10	/* A configuration error was detected */
#define EV_INVALID_STATE	11	/* The object is in an invalid state */
#define EV_UNIMPLEMENTED	12	/* Unimplemented hypercall */
#define EV_BUFFER_OVERFLOW	13	/* Caller-supplied buffer too small */

#endif /* _ASM_POWERPC_EPAPR_HCALLS_H */