*/
int os_close(int fd);
+/**
+ * Access to the OS unlink() system call
+ *
+ * \param pathname Path of file to delete
+ * \return 0 for success, other for error
+ */
+int os_unlink(const char *pathname);
+
/**
* Access to the OS exit() system call
*
/**
* Put tty into raw mode to mimic serial console better
+ *
+ * @param fd File descriptor of stdin (normally 0)
+ * @param allow_sigs Allow Ctrl-C, Ctrl-Z to generate signals rather than
+ * be handled by U-Boot
*/
-void os_tty_raw(int fd);
+void os_tty_raw(int fd, bool allow_sigs);
/**
* Acquires some memory from the underlying os.
*/
void *os_malloc(size_t length);
+/**
+ * Free memory previous allocated with os_malloc()/os_realloc()
+ *
+ * This returns the memory to the OS.
+ *
+ * \param ptr Pointer to memory block to free
+ */
+void os_free(void *ptr);
+
+/**
+ * Reallocate previously-allocated memory to increase/decrease space
+ *
+ * This works in a similar way to the C library realloc() function. If
+ * length is 0, then ptr is freed. Otherwise the space used by ptr is
+ * expanded or reduced depending on whether length is larger or smaller
+ * than before.
+ *
+ * If ptr is NULL, then this is similar to calling os_malloc().
+ *
+ * This function may need to move the memory block to make room for any
+ * extra space, in which case the new pointer is returned.
+ *
+ * \param ptr Pointer to memory block to reallocate
+ * \param length New length for memory block
+ * \return pointer to new memory block, or NULL on failure or if length
+ * is 0.
+ */
+void *os_realloc(void *ptr, size_t length);
+
/**
* Access to the usleep function of the os
*
* Get the size of a file
*
* @param fname Filename to check
- * @return size of file, or -1 if an error ocurred
+ * @param size size of file is returned if no error
+ * @return 0 on success or -1 if an error ocurred
+ */
+int os_get_filesize(const char *fname, loff_t *size);
+
+/**
+ * Write a character to the controlling OS terminal
+ *
+ * This bypasses the U-Boot console support and writes directly to the OS
+ * stdout file descriptor.
+ *
+ * @param ch Character to write
+ */
+void os_putc(int ch);
+
+/**
+ * Write a string to the controlling OS terminal
+ *
+ * This bypasses the U-Boot console support and writes directly to the OS
+ * stdout file descriptor.
+ *
+ * @param str String to write (note that \n is not appended)
+ */
+void os_puts(const char *str);
+
+/**
+ * Write the sandbox RAM buffer to a existing file
+ *
+ * @param fname Filename to write memory to (simple binary format)
+ * @return 0 if OK, -ve on error
+ */
+int os_write_ram_buf(const char *fname);
+
+/**
+ * Read the sandbox RAM buffer from an existing file
+ *
+ * @param fname Filename containing memory (simple binary format)
+ * @return 0 if OK, -ve on error
+ */
+int os_read_ram_buf(const char *fname);
+
+/**
+ * Jump to a new executable image
+ *
+ * This uses exec() to run a new executable image, after putting it in a
+ * temporary file. The same arguments and environment are passed to this
+ * new image, with the addition of:
+ *
+ * -j <filename> Specifies the filename the image was written to. The
+ * calling image may want to delete this at some point.
+ * -m <filename> Specifies the file containing the sandbox memory
+ * (ram_buf) from this image, so that the new image can
+ * have access to this. It also means that the original
+ * memory filename passed to U-Boot will be left intact.
+ *
+ * @param dest Buffer containing executable image
+ * @param size Size of buffer
*/
-ssize_t os_get_filesize(const char *fname);
+int os_jump_to_image(const void *dest, int size);
#endif