configs: stm32mp13: Add support for baudrates higher than 115200

[platform/kernel/u-boot.git] / include / semihosting.h

diff --git a/include/semihosting.h b/include/semihosting.h
index d8337b6..f1f7346 100644 (file)
--- a/include/semihosting.h
+++ b/include/semihosting.h
@@ -6,6 +6,47 @@
 #ifndef _SEMIHOSTING_H
 #define _SEMIHOSTING_H
 
+/*
+ * These are the encoded instructions used to indicate a semihosting trap. They
+ * are named like SMH_ISA_INSN, where ISA is the instruction set (e.g.
+ * AArch64), and INSN is the mneumonic for the instruction.
+ */
+#define SMH_A64_HLT 0xD45E0000
+#define SMH_A32_SVC 0xEF123456
+#define SMH_A32_HLT 0xE10F0070
+#define SMH_T32_SVC 0xDFAB
+#define SMH_T32_HLT 0xBABC
+
+#if CONFIG_IS_ENABLED(SEMIHOSTING_FALLBACK)
+/**
+ * semihosting_enabled() - Determine whether semihosting is supported
+ *
+ * Semihosting-based drivers should call this function before making other
+ * semihosting calls.
+ *
+ * Return: %true if a debugger is attached which supports semihosting, %false
+ *         otherwise
+ */
+bool semihosting_enabled(void);
+
+/**
+ * disable_semihosting() - Cause semihosting_enabled() to return false
+ *
+ * If U-Boot ever receives an unhandled exception caused by a semihosting trap,
+ * the trap handler should call this function.
+ */
+void disable_semihosting(void);
+#else
+static inline bool semihosting_enabled(void)
+{
+       return CONFIG_IS_ENABLED(SEMIHOSTING);
+}
+
+static inline void disable_semihosting(void)
+{
+}
+#endif
+
 /**
  * enum smh_open_mode - Numeric file modes for use with smh_open()
  * MODE_READ: 'r'
@@ -51,6 +92,17 @@ long smh_open(const char *fname, enum smh_open_mode mode);
 long smh_read(long fd, void *memp, size_t len);
 
 /**
+ * smh_write() - Write data to a file
+ * @fd: A file descriptor returned from smh_open()
+ * @memp: Pointer to a buffer of memory of at least @len bytes
+ * @len: The number of bytes to read
+ * @written: Pointer which will be updated with the actual bytes written
+ *
+ * Return: 0 on success or negative error on failure
+ */
+long smh_write(long fd, const void *memp, size_t len, ulong *written);
+
+/**
  * smh_close() - Close an open file
  * @fd: A file descriptor returned from smh_open()
  *
@@ -66,4 +118,32 @@ long smh_close(long fd);
  */
 long smh_flen(long fd);
 
+/**
+ * smh_seek() - Seek to a position in a file
+ * @fd: A file descriptor returned from smh_open()
+ * @pos: The offset (in bytes) to seek to
+ *
+ * Return: 0 on success or negative error on failure
+ */
+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 */