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freebsd/sys/dev/psci/psci_arm.S
Andrew Turner 46b1fe9224 Add a driver for the ARM Power State Coordination Interface (PSCI). This
handles versions 0.1 and 0.2 of the standard on 32-bit ARM.

With this driver we can shutdown in QEMU. Further work is needed to
turn secondary cores on on boot and to support later revisions of the
specification.

Submitted by:	Robin Randhawa <Robin.Randhawa at ARM.com>
Sponsored by:	The FreeBSD Foundation
2015-04-12 13:00:58 +00:00

48 lines
1.7 KiB
ArmAsm

/*-
* Copyright (c) 2015 Andrew Turner
* 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.
*
* 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.
*
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
.arch_extension virt /* For hvc */
/*
* int psci_hvc_despatch(register_t psci_fnid, register_t...)
*/
ENTRY(psci_hvc_despatch)
hvc #0
RET
END(psci_hvc_despatch)
/*
* int psci_smc_despatch(register_t psci_fnid, register_t...)
*/
ENTRY(psci_smc_despatch)
smc #0
RET
END(psci_hvc_despatch)