Andrew Walbran | 68a8c16 | 2022-03-07 15:38:42 +0000 | [diff] [blame] | 1 | // Copyright 2022, 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 | //! pVM firmware. |
| 16 | |
| 17 | #![no_main] |
| 18 | #![no_std] |
| 19 | |
Andrew Walbran | dfb7337 | 2022-04-21 10:52:27 +0000 | [diff] [blame] | 20 | mod exceptions; |
Andrew Walbran | 68a8c16 | 2022-03-07 15:38:42 +0000 | [diff] [blame] | 21 | |
Pierre-Clément Tosi | 263ffd5 | 2022-10-05 20:27:50 +0100 | [diff] [blame^] | 22 | use core::fmt; |
Andrew Walbran | b996b4a | 2022-04-22 15:15:41 +0000 | [diff] [blame] | 23 | |
Pierre-Clément Tosi | 263ffd5 | 2022-10-05 20:27:50 +0100 | [diff] [blame^] | 24 | use vmbase::{main, power::reboot, println}; |
Andrew Walbran | 68a8c16 | 2022-03-07 15:38:42 +0000 | [diff] [blame] | 25 | |
Pierre-Clément Tosi | 263ffd5 | 2022-10-05 20:27:50 +0100 | [diff] [blame^] | 26 | #[derive(Debug, Clone)] |
| 27 | enum Error {} |
| 28 | |
| 29 | impl fmt::Display for Error { |
| 30 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
| 31 | #[allow(clippy::match_single_binding)] |
| 32 | let msg = match self { |
| 33 | _ => "", |
| 34 | }; |
| 35 | write!(f, "{}", msg) |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | fn main(fdt_address: u64, payload_start: u64, payload_size: u64, arg3: u64) -> Result<(), Error> { |
Andrew Walbran | e03395a | 2022-04-29 15:15:49 +0000 | [diff] [blame] | 40 | println!("pVM firmware"); |
| 41 | println!( |
Andrew Walbran | f17c651 | 2022-06-28 15:52:23 +0000 | [diff] [blame] | 42 | "fdt_address={:#018x}, payload_start={:#018x}, payload_size={:#018x}, x3={:#018x}", |
Andrew Walbran | e03395a | 2022-04-29 15:15:49 +0000 | [diff] [blame] | 43 | fdt_address, payload_start, payload_size, arg3, |
| 44 | ); |
Andrew Walbran | 5db3235 | 2022-05-06 13:58:11 +0000 | [diff] [blame] | 45 | |
| 46 | println!("Starting payload..."); |
Pierre-Clément Tosi | 263ffd5 | 2022-10-05 20:27:50 +0100 | [diff] [blame^] | 47 | |
| 48 | Ok(()) |
| 49 | } |
| 50 | |
| 51 | main!(main_wrapper); |
| 52 | |
| 53 | /// Entry point for pVM firmware. |
| 54 | pub fn main_wrapper(fdt_address: u64, payload_start: u64, payload_size: u64, arg3: u64) { |
| 55 | match main(fdt_address, payload_start, payload_size, arg3) { |
| 56 | Ok(()) => jump_to_payload(fdt_address, payload_start), |
| 57 | Err(e) => { |
| 58 | println!("Boot rejected: {}", e); |
| 59 | } |
| 60 | } |
| 61 | reboot() |
| 62 | } |
| 63 | |
| 64 | fn jump_to_payload(fdt_address: u64, payload_start: u64) { |
Andrew Walbran | 5db3235 | 2022-05-06 13:58:11 +0000 | [diff] [blame] | 65 | // Safe because this is a function we have implemented in assembly that matches its signature |
| 66 | // here. |
| 67 | unsafe { |
| 68 | start_payload(fdt_address, payload_start); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | extern "C" { |
| 73 | fn start_payload(fdt_address: u64, payload_start: u64) -> !; |
Andrew Walbran | 68a8c16 | 2022-03-07 15:38:42 +0000 | [diff] [blame] | 74 | } |