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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-05-01 15:20:08 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-05-01 15:20:08 -0700 |
| commit | 9a87ffc99ec8eb8d35eed7c4f816d75f5cc9662e (patch) | |
| tree | d57f3a63479a07b4e0cece029886e76e04feb984 /arch/arm/include/asm/semihost.h | |
| parent | 5dc63e56a9cf8df0b59c234a505a1653f1bdf885 (diff) | |
| parent | 53bea86b5712c7491bb3dae12e271666df0a308c (diff) | |
Merge branch 'next' into for-linus
Prepare input updates for 6.4 merge window.
Diffstat (limited to 'arch/arm/include/asm/semihost.h')
| -rw-r--r-- | arch/arm/include/asm/semihost.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/include/asm/semihost.h b/arch/arm/include/asm/semihost.h new file mode 100644 index 000000000000..f365787e7c23 --- /dev/null +++ b/arch/arm/include/asm/semihost.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2012 ARM Ltd. + * Author: Marc Zyngier <marc.zyngier@arm.com> + * + * Adapted for ARM and earlycon: + * Copyright (C) 2014 Linaro Ltd. + * Author: Rob Herring <robh@kernel.org> + */ + +#ifndef _ARM_SEMIHOST_H_ +#define _ARM_SEMIHOST_H_ + +#ifdef CONFIG_THUMB2_KERNEL +#define SEMIHOST_SWI "0xab" +#else +#define SEMIHOST_SWI "0x123456" +#endif + +struct uart_port; + +static inline void smh_putc(struct uart_port *port, unsigned char c) +{ + asm volatile("mov r1, %0\n" + "mov r0, #3\n" + "svc " SEMIHOST_SWI "\n" + : : "r" (&c) : "r0", "r1", "memory"); +} + +#endif /* _ARM_SEMIHOST_H_ */ |