Alice Wang | 474c0ee | 2023-09-14 12:52:33 +0000 | [diff] [blame] | 1 | // Copyright 2023, The Android Open Source Project |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | //! High-level FDT functions. |
| 16 | |
| 17 | use core::ops::Range; |
| 18 | use libfdt::{Fdt, FdtError}; |
| 19 | use vmbase::cstr; |
| 20 | |
| 21 | /// Reads the DICE data range from the given `fdt`. |
| 22 | pub fn read_dice_range_from(fdt: &Fdt) -> libfdt::Result<Range<usize>> { |
| 23 | let node = fdt.node(cstr!("/reserved-memory"))?.ok_or(FdtError::NotFound)?; |
| 24 | let node = node.next_compatible(cstr!("google,open-dice"))?.ok_or(FdtError::NotFound)?; |
| 25 | node.first_reg()?.try_into() |
| 26 | } |