arm: smh: Add some file manipulation commands
In order to add filesystem support, we will need to be able to seek and write files. Add the appropriate helper functions. Signed-off-by: Sean Anderson <sean.anderson@seco.com>
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@@ -50,6 +50,17 @@ long smh_open(const char *fname, enum smh_open_mode mode);
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*/
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long smh_read(long fd, void *memp, size_t len);
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/**
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* smh_write() - Write data to a file
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* @fd: A file descriptor returned from smh_open()
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* @memp: Pointer to a buffer of memory of at least @len bytes
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* @len: The number of bytes to read
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* @written: Pointer which will be updated with the actual bytes written
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*
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* Return: 0 on success or negative error on failure
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*/
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long smh_write(long fd, const void *memp, size_t len, ulong *written);
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/**
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* smh_close() - Close an open file
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* @fd: A file descriptor returned from smh_open()
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@@ -66,4 +77,13 @@ long smh_close(long fd);
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*/
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long smh_flen(long fd);
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/**
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* smh_seek() - Seek to a position in a file
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* @fd: A file descriptor returned from smh_open()
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* @pos: The offset (in bytes) to seek to
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*
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* Return: 0 on success or negative error on failure
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*/
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long smh_seek(long fd, long pos);
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#endif /* _SEMIHOSTING_H */
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