8de702cb67
Provides a blocking call to read a character from the console using semihosting.chardev, if specified. This takes some careful command line options to use stdio successfully as the serial ports, monitor and semihost all want to use stdio. Here's a sample set of command line options which share stdio between semihost, monitor and serial ports: qemu \ -chardev stdio,mux=on,id=stdio0 \ -serial chardev:stdio0 \ -semihosting-config enable=on,chardev=stdio0 \ -mon chardev=stdio0,mode=readline This creates a chardev hooked to stdio and then connects all of the subsystems to it. A shorter mechanism would be good to hear about. Signed-off-by: Keith Packard <keithp@keithp.com> Message-Id: <20191104204230.12249-1-keithp@keithp.com> [AJB: fixed up deadlock, minor commit title reword] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Keith Packard <keithp@keithp.com> Tested-by: Keith Packard <keithp@keithp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/*
|
|
* Semihosting support
|
|
*
|
|
* Copyright (c) 2015 Imagination Technologies
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef SEMIHOST_H
|
|
#define SEMIHOST_H
|
|
|
|
typedef enum SemihostingTarget {
|
|
SEMIHOSTING_TARGET_AUTO = 0,
|
|
SEMIHOSTING_TARGET_NATIVE,
|
|
SEMIHOSTING_TARGET_GDB
|
|
} SemihostingTarget;
|
|
|
|
#ifdef CONFIG_USER_ONLY
|
|
static inline bool semihosting_enabled(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline SemihostingTarget semihosting_get_target(void)
|
|
{
|
|
return SEMIHOSTING_TARGET_AUTO;
|
|
}
|
|
|
|
static inline const char *semihosting_get_arg(int i)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int semihosting_get_argc(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline const char *semihosting_get_cmdline(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline Chardev *semihosting_get_chardev(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline void qemu_semihosting_console_init(void)
|
|
{
|
|
}
|
|
#else /* !CONFIG_USER_ONLY */
|
|
bool semihosting_enabled(void);
|
|
SemihostingTarget semihosting_get_target(void);
|
|
const char *semihosting_get_arg(int i);
|
|
int semihosting_get_argc(void);
|
|
const char *semihosting_get_cmdline(void);
|
|
void semihosting_arg_fallback(const char *file, const char *cmd);
|
|
Chardev *semihosting_get_chardev(void);
|
|
/* for vl.c hooks */
|
|
void qemu_semihosting_enable(void);
|
|
int qemu_semihosting_config_options(const char *opt);
|
|
void qemu_semihosting_connect_chardevs(void);
|
|
void qemu_semihosting_console_init(void);
|
|
#endif /* CONFIG_USER_ONLY */
|
|
|
|
#endif /* SEMIHOST_H */
|