mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-26 21:13:48 +00:00
974f48366f
On certain places it is required to flush output print buffers to ensure that text strings were sent to console or serial devices. For example when printing message that U-Boot is going to boot kernel or when U-Boot is going to change baudrate of terminal device. Therefore introduce a new flush() and fflush() functions into console code. These functions will call .flush callback of associated stdio_dev device. As this function may increase U-Boot side, allow to compile U-Boot without this function. For this purpose there is a new config CONSOLE_FLUSH_SUPPORT which is enabled by default and can be disabled. It is a good idea to have this option enabled for all boards which have enough space for it. When option is disabled when U-Boot defines just empty static inline function fflush() to avoid ifdefs in other code. Signed-off-by: Pali Rohár <pali@kernel.org> Reviewed-by: Simon Glass <sjg@chromium.org>
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#ifndef __STDIO_H
|
|
#define __STDIO_H
|
|
|
|
#include <stdarg.h>
|
|
#include <linux/compiler.h>
|
|
|
|
/* stdin */
|
|
int getchar(void);
|
|
int tstc(void);
|
|
|
|
/* stdout */
|
|
#if !defined(CONFIG_SPL_BUILD) || \
|
|
(defined(CONFIG_TPL_BUILD) && defined(CONFIG_TPL_SERIAL)) || \
|
|
(defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD) && \
|
|
defined(CONFIG_SPL_SERIAL))
|
|
void putc(const char c);
|
|
void puts(const char *s);
|
|
#ifdef CONFIG_CONSOLE_FLUSH_SUPPORT
|
|
void flush(void);
|
|
#else
|
|
static inline void flush(void) {}
|
|
#endif
|
|
int __printf(1, 2) printf(const char *fmt, ...);
|
|
int vprintf(const char *fmt, va_list args);
|
|
#else
|
|
static inline void putc(const char c)
|
|
{
|
|
}
|
|
|
|
static inline void puts(const char *s)
|
|
{
|
|
}
|
|
|
|
static inline void flush(void)
|
|
{
|
|
}
|
|
|
|
static inline int __printf(1, 2) printf(const char *fmt, ...)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int vprintf(const char *fmt, va_list args)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* FILE based functions (can only be used AFTER relocation!)
|
|
*/
|
|
#define stdin 0
|
|
#define stdout 1
|
|
#define stderr 2
|
|
#define MAX_FILES 3
|
|
|
|
/* stderr */
|
|
#define eputc(c) fputc(stderr, c)
|
|
#define eputs(s) fputs(stderr, s)
|
|
#define eflush() fflush(stderr)
|
|
#define eprintf(fmt, args...) fprintf(stderr, fmt, ##args)
|
|
|
|
int __printf(2, 3) fprintf(int file, const char *fmt, ...);
|
|
void fputs(int file, const char *s);
|
|
void fputc(int file, const char c);
|
|
#ifdef CONFIG_CONSOLE_FLUSH_SUPPORT
|
|
void fflush(int file);
|
|
#else
|
|
static inline void fflush(int file) {}
|
|
#endif
|
|
int ftstc(int file);
|
|
int fgetc(int file);
|
|
|
|
#endif /* __STDIO_H */
|