Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
31 lines
643 B
C
31 lines
643 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2012 ARM Ltd.
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* Adapted for ARM and earlycon:
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* Copyright (C) 2014 Linaro Ltd.
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* Author: Rob Herring <robh@kernel.org>
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*/
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#ifndef _ARM_SEMIHOST_H_
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#define _ARM_SEMIHOST_H_
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#ifdef CONFIG_THUMB2_KERNEL
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#define SEMIHOST_SWI "0xab"
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#else
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#define SEMIHOST_SWI "0x123456"
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#endif
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struct uart_port;
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static inline void smh_putc(struct uart_port *port, unsigned char c)
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{
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asm volatile("mov r1, %0\n"
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"mov r0, #3\n"
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"svc " SEMIHOST_SWI "\n"
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: : "r" (&c) : "r0", "r1", "memory");
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}
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#endif /* _ARM_SEMIHOST_H_ */
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