This adds three wrappers around the semihosting commands for reading and writing to the host console. We use the more standard getc/putc/puts names instead of readc/writec/write0 for familiarity.
Signed-off-by: Sean Anderson sean.anderson@seco.com ---
arch/arm/lib/semihosting.c | 18 ++++++++++++++++++ include/semihosting.h | 19 +++++++++++++++++++ 2 files changed, 37 insertions(+)
diff --git a/arch/arm/lib/semihosting.c b/arch/arm/lib/semihosting.c index 57ab25294f..7595dbc4a9 100644 --- a/arch/arm/lib/semihosting.c +++ b/arch/arm/lib/semihosting.c @@ -15,8 +15,11 @@
#define SYSOPEN 0x01 #define SYSCLOSE 0x02 +#define SYSWRITEC 0x03 +#define SYSWRITE0 0x04 #define SYSWRITE 0x05 #define SYSREAD 0x06 +#define SYSREADC 0x07 #define SYSSEEK 0x0A #define SYSFLEN 0x0C #define SYSERRNO 0x13 @@ -167,3 +170,18 @@ long smh_seek(long fd, long pos) return smh_errno(); return 0; } + +int smh_getc(void) +{ + return smh_trap(SYSREADC, NULL); +} + +void smh_putc(char ch) +{ + smh_trap(SYSWRITEC, &ch); +} + +void smh_puts(const char *s) +{ + smh_trap(SYSWRITE0, (char *)s); +} diff --git a/include/semihosting.h b/include/semihosting.h index b53c650444..6f3c29786c 100644 --- a/include/semihosting.h +++ b/include/semihosting.h @@ -86,4 +86,23 @@ long smh_flen(long fd); */ long smh_seek(long fd, long pos);
+/** + * smh_getc() - Read a character from stdin + * + * Return: The character read, or a negative error on failure + */ +int smh_getc(void); + +/** + * smh_putc() - Print a character on stdout + * @ch: The character to print + */ +void smh_putc(char ch); + +/** + * smh_write0() - Print a nul-terminated string on stdout + * @s: The string to print + */ +void smh_puts(const char *s); + #endif /* _SEMIHOSTING_H */