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RTEMS 6.1
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Tag Header. More...
#include <vc_defines.h>
Data Fields | |
| uint32_t | tag |
| Property Tag ID. | |
| uint32_t | val_buf_size |
| The size of request qnd responce buffer. | |
| uint32_t | val_len |
| The size of response buffer set by videocore. | |
Tag Header.
Tag is used for getting/testing/setting an property. All tags should start with this header. Then it should be followed by a data buffer for request and response.
| uint32_t bcm2835_mbox_tag_hdr::val_len |
The size of response buffer set by videocore.
upper bit reserved for request/response indicator