diff options
Diffstat (limited to 'drivers/tty/serial/earlycon-arm-semihost.c')
-rw-r--r-- | drivers/tty/serial/earlycon-arm-semihost.c | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/drivers/tty/serial/earlycon-arm-semihost.c b/drivers/tty/serial/earlycon-arm-semihost.c deleted file mode 100644 index fcdec5f42376..000000000000 --- a/drivers/tty/serial/earlycon-arm-semihost.c +++ /dev/null @@ -1,51 +0,0 @@ -// 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> - */ -#include <linux/kernel.h> -#include <linux/console.h> -#include <linux/init.h> -#include <linux/serial_core.h> - -#ifdef CONFIG_THUMB2_KERNEL -#define SEMIHOST_SWI "0xab" -#else -#define SEMIHOST_SWI "0x123456" -#endif - -/* - * Semihosting-based debug console - */ -static void smh_putc(struct uart_port *port, unsigned char c) -{ -#ifdef CONFIG_ARM64 - asm volatile("mov x1, %0\n" - "mov x0, #3\n" - "hlt 0xf000\n" - : : "r" (&c) : "x0", "x1", "memory"); -#else - asm volatile("mov r1, %0\n" - "mov r0, #3\n" - "svc " SEMIHOST_SWI "\n" - : : "r" (&c) : "r0", "r1", "memory"); -#endif -} - -static void smh_write(struct console *con, const char *s, unsigned n) -{ - struct earlycon_device *dev = con->data; - uart_console_write(&dev->port, s, n, smh_putc); -} - -static int -__init early_smh_setup(struct earlycon_device *device, const char *opt) -{ - device->con->write = smh_write; - return 0; -} -EARLYCON_DECLARE(smh, early_smh_setup); |