RTEMS: bcm2835_mbox_tag_hdr Struct Reference

| RTEMS 5.4-rc2

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Data Fields
bcm2835_mbox_tag_hdr Struct Reference
Board Support Packages » ARM » Raspberry Pi » Register Definitions

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.

## Detailed Description

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.

## Field Documentation

## ◆ val_len

uint32_t bcm2835_mbox_tag_hdr::val_len

The size of response buffer set by videocore.

upper bit reserved for request/response indicator

The documentation for this struct was generated from the following file:

- bsps/arm/raspberrypi/start/vc_defines.h