[DM/FEATURE] Support hardware mailbox #9599
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Communication in AMP. Signed-off-by: GuEe-GUI <[email protected]>
The mailbox device(s) may be instantiated in one of three equivalent way:
Device Tree node, eg.:
```dts
interrupt-controller@0 {
interrupt-controller;
#interrupt-cells = <1>;
};
pic_mailbox@10000 {
compatible = "rt-thread,pic-mailbox";
reg = <0x10000 0x100>;
position = <0>;
interrupts = <34>;
peer-interrupts = <35>;
uid = <0>;
#mbox-cells = <1>;
};
```
Signed-off-by: GuEe-GUI <[email protected]>
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[
Communication in AMP.
Depends on: #9576
qemu-virt64-aarch64
]
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