freebsd-dev/sys/dev/psci/smccc.h

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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2018 Andrew Turner
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _PSCI_SMCCC_H_
#define _PSCI_SMCCC_H_
#define SMCCC_VERSION_MAJOR(ver) (((ver) >> 16) & 0x7fff)
#define SMCCC_VERSION_MINOR(ver) ((ver) & 0xffff)
#define SMCCC_FUNC_ID(type, call_conv, range, func) \
(((type) << 31) | \
((call_conv) << 30) | \
(((range) & 0x3f) << 24) | \
((func) & 0xffff))
#define SMCCC_YIELDING_CALL 0
#define SMCCC_FAST_CALL 1
#define SMCCC_32BIT_CALL 0
#define SMCCC_64BIT_CALL 1
/*
* Arm Architecture Calls.
* These are documented in the document ARM DEN 0070A.
*/
#define SMCCC_VERSION \
SMCCC_FUNC_ID(SMCCC_FAST_CALL, SMCCC_32BIT_CALL, 0, 0)
#define SMCCC_ARCH_FEATURES \
SMCCC_FUNC_ID(SMCCC_FAST_CALL, SMCCC_32BIT_CALL, 0, 1)
#define SMCCC_ARCH_WORKAROUND_1 \
SMCCC_FUNC_ID(SMCCC_FAST_CALL, SMCCC_32BIT_CALL, 0, 0x8000)
#define SMCCC_ARCH_WORKAROUND_2 \
SMCCC_FUNC_ID(SMCCC_FAST_CALL, SMCCC_32BIT_CALL, 0, 0x7fff)
/* The return values from ARM DEN 0070A. */
#define SMCCC_RET_SUCCESS 0
#define SMCCC_RET_NOT_SUPPORTED -1
#define SMCCC_RET_NOT_REQUIRED -2
int32_t smccc_arch_features(uint32_t);
int smccc_arch_workaround_1(void);
int smccc_arch_workaround_2(int);
#endif /* _PSCI_SMCCC_H_ */