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acrn-kernel/arch/arm/mach-highbank/smc.S

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-04 16:11:33 +08:00
/* SPDX-License-Identifier: GPL-2.0-only */
ARM: highbank: Add smc calls to enable/disable the L2 Linux runs in non-secure mode on highbank, so we need secure monitor calls to enable and disable the PL310. Rather than invent new smc calls, the same calling convention used by OMAP is used here. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2012-06-07 06:20:10 +08:00
/*
* Copied from omap44xx-smc.S Copyright (C) 2010 Texas Instruments, Inc.
* Copyright 2012 Calxeda, Inc.
*/
#include <linux/linkage.h>
/*
* This is common routine to manage secure monitor API
* used to modify the PL310 secure registers.
* 'r0' contains the value to be modified and 'r12' contains
* the monitor API number.
* Function signature : void highbank_smc1(u32 fn, u32 arg)
*/
ARM: use arch_extension directive instead of arch argument The LLVM Target parser currently does not allow to specify the security extension as part of -march (see also LLVM Bug 40186 [0]). When trying to use Clang with LLVM's integrated assembler, this leads to build errors such as this: clang-8: error: the clang compiler does not support '-Wa,-march=armv7-a+sec' Use ".arch_extension sec" to enable the security extension in a more portable fasion. Also make sure to use ".arch armv7-a" in case a v6/v7 multi-platform kernel is being built. Note that this is technically not exactly the same as the old code checked for availabilty of the security extension by calling as-instr. However, there are already other sites which use ".arch_extension sec" unconditionally, hence de-facto we need an assembler capable of ".arch_extension sec" already today (arch/arm/mm/proc-v7.S). The arch extension "sec" is available since binutils 2.21 according to its documentation [1]. [0] https://bugs.llvm.org/show_bug.cgi?id=40186 [1] https://sourceware.org/binutils/docs-2.21/as/ARM-Options.html Signed-off-by: Stefan Agner <stefan@agner.ch> Acked-by: Mans Rullgard <mans@mansr.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Olof Johansson <olof@lixom.net>
2019-05-28 06:40:50 +08:00
.arch armv7-a
.arch_extension sec
ARM: highbank: Add smc calls to enable/disable the L2 Linux runs in non-secure mode on highbank, so we need secure monitor calls to enable and disable the PL310. Rather than invent new smc calls, the same calling convention used by OMAP is used here. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2012-06-07 06:20:10 +08:00
ENTRY(highbank_smc1)
stmfd sp!, {r4-r11, lr}
mov r12, r0
mov r0, r1
dsb
smc #0
ldmfd sp!, {r4-r11, pc}
ENDPROC(highbank_smc1)