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lib: utils/serial: Implement console_puts() for semihosting
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>
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@ -15,6 +15,7 @@
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#define SYSOPEN 0x01
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#define SYSWRITEC 0x03
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#define SYSWRITE 0x05
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#define SYSREAD 0x06
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#define SYSREADC 0x07
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#define SYSERRNO 0x13
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@ -93,6 +94,7 @@ static int semihosting_errno(void)
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}
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static int semihosting_infd = SBI_ENODEV;
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static int semihosting_outfd = SBI_ENODEV;
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static long semihosting_open(const char *fname, enum semihosting_open_mode mode)
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{
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@ -141,6 +143,21 @@ static long semihosting_read(long fd, void *memp, size_t len)
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return len - ret;
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}
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static long semihosting_write(long fd, const void *memp, size_t len)
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{
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long ret;
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struct semihosting_rdwr_s write;
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write.fd = fd;
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write.memp = (void *)memp;
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write.len = len;
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ret = semihosting_trap(SYSWRITE, &write);
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if (ret < 0)
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return semihosting_errno();
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return len - ret;
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}
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/* clang-format on */
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static void semihosting_putc(char ch)
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@ -148,6 +165,24 @@ static void semihosting_putc(char ch)
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semihosting_trap(SYSWRITEC, &ch);
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}
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static unsigned long semihosting_puts(const char *str, unsigned long len)
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{
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char ch;
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long ret;
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unsigned long i;
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if (semihosting_outfd < 0) {
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for (i = 0; i < len; i++) {
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ch = str[i];
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semihosting_trap(SYSWRITEC, &ch);
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}
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ret = len;
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} else
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ret = semihosting_write(semihosting_outfd, str, len);
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return (ret < 0) ? 0 : ret;
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}
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static int semihosting_getc(void)
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{
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char ch = 0;
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@ -165,12 +200,14 @@ static int semihosting_getc(void)
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static struct sbi_console_device semihosting_console = {
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.name = "semihosting",
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.console_putc = semihosting_putc,
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.console_puts = semihosting_puts,
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.console_getc = semihosting_getc
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};
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int semihosting_init(void)
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{
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semihosting_infd = semihosting_open(":tt", MODE_READ);
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semihosting_outfd = semihosting_open(":tt", MODE_WRITE);
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sbi_console_set_device(&semihosting_console);
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