opentitanlib/chip/
device_id.rs

1// Copyright lowRISC contributors (OpenTitan project).
2// Licensed under the Apache License, Version 2.0, see LICENSE for details.
3// SPDX-License-Identifier: Apache-2.0
4
5use anyhow::Result;
6use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
7use serde::Serialize;
8use serde_annotate::Annotate;
9use std::io::{Read, Write};
10
11#[derive(Debug, Default, Serialize, Annotate)]
12pub struct DeviceId {
13    #[annotate(format=hex)]
14    pub creator: u16,
15    #[annotate(format=hex)]
16    pub product: u16,
17    #[annotate(format=hex)]
18    pub din: u64,
19    #[annotate(format=hex)]
20    pub crc32: u32,
21    #[annotate(format=hex)]
22    pub sku_specific: [u32; 4],
23}
24
25impl DeviceId {
26    pub fn read(src: &mut impl Read) -> Result<Self> {
27        let creator = src.read_u16::<LittleEndian>()?;
28        let product = src.read_u16::<LittleEndian>()?;
29        let din = src.read_u64::<LittleEndian>()?;
30        let crc32 = src.read_u32::<LittleEndian>()?;
31        let mut sku_specific = [0u32; 4];
32        src.read_u32_into::<LittleEndian>(&mut sku_specific)?;
33        Ok(Self {
34            creator,
35            product,
36            din,
37            crc32,
38            sku_specific,
39        })
40    }
41
42    pub fn write(&self, dest: &mut impl Write) -> Result<()> {
43        dest.write_u16::<LittleEndian>(self.creator)?;
44        dest.write_u16::<LittleEndian>(self.product)?;
45        dest.write_u64::<LittleEndian>(self.din)?;
46        dest.write_u32::<LittleEndian>(self.crc32)?;
47        for sku_specific in &self.sku_specific {
48            dest.write_u32::<LittleEndian>(*sku_specific)?;
49        }
50        Ok(())
51    }
52}
opentitanlib/chip/device_id.rs

opentitanlib/chip/
device_id.rs
