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lib: utils/serial: Implement console_puts() for semihosting

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We implement console_puts() for semihosting serial driver to speed-up
semihosting based prints.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
This commit is contained in:
Anup Patel
2022-11-23 15:40:17 +05:30
committed by Anup Patel
parent c43903c4ea
commit 29285aead0
1 changed files with 37 additions and 0 deletions
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37
lib/utils/serial/semihosting.c
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@@ -15,6 +15,7 @@
#define SYSOPEN 0x01
#define SYSWRITEC 0x03
#define SYSWRITE 0x05
#define SYSREAD 0x06
#define SYSREADC 0x07
#define SYSERRNO 0x13
@@ -93,6 +94,7 @@ static int semihosting_errno(void)
}
static int semihosting_infd = SBI_ENODEV;
static int semihosting_outfd = SBI_ENODEV;
static long semihosting_open(const char *fname, enum semihosting_open_mode mode)
{
@@ -141,6 +143,21 @@ static long semihosting_read(long fd, void *memp, size_t len)
return len - ret;
}
static long semihosting_write(long fd, const void *memp, size_t len)
{
long ret;
struct semihosting_rdwr_s write;
write.fd = fd;
write.memp = (void *)memp;
write.len = len;
ret = semihosting_trap(SYSWRITE, &write);
if (ret < 0)
return semihosting_errno();
return len - ret;
}
/* clang-format on */
static void semihosting_putc(char ch)
@@ -148,6 +165,24 @@ static void semihosting_putc(char ch)
semihosting_trap(SYSWRITEC, &ch);
}
static unsigned long semihosting_puts(const char *str, unsigned long len)
{
char ch;
long ret;
unsigned long i;
if (semihosting_outfd < 0) {
for (i = 0; i < len; i++) {
ch = str[i];
semihosting_trap(SYSWRITEC, &ch);
}
ret = len;
} else
ret = semihosting_write(semihosting_outfd, str, len);
return (ret < 0) ? 0 : ret;
}
static int semihosting_getc(void)
{
char ch = 0;
@@ -165,12 +200,14 @@ static int semihosting_getc(void)
static struct sbi_console_device semihosting_console = {
.name = "semihosting",
.console_putc = semihosting_putc,
.console_puts = semihosting_puts,
.console_getc = semihosting_getc
};
int semihosting_init(void)
{
semihosting_infd = semihosting_open(":tt", MODE_READ);
semihosting_outfd = semihosting_open(":tt", MODE_WRITE);
sbi_console_set_device(&semihosting_console);