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Diffstat (limited to 'drivers/tty/serial/earlycon-arm-semihost.c')
-rw-r--r--drivers/tty/serial/earlycon-arm-semihost.c51
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);