1 // Copyright 2024, 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 use crate::defs::{EfiGuid, EfiRiscvBootProtocol, EFI_STATUS_NOT_FOUND}; 16 use crate::protocol::{Protocol, ProtocolInfo}; 17 use crate::{efi_call, map_efi_err, EfiResult}; 18 19 /// RISCV_EFI_BOOT_PROTOCOL 20 pub struct RiscvBootProtocol; 21 22 impl ProtocolInfo for RiscvBootProtocol { 23 type InterfaceType = EfiRiscvBootProtocol; 24 25 const GUID: EfiGuid = 26 EfiGuid::new(0xccd15fec, 0x6f73, 0x4eec, [0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf]); 27 } 28 29 impl<'a> Protocol<'a, RiscvBootProtocol> { get_boot_hartid(&self) -> EfiResult<usize>30 pub fn get_boot_hartid(&self) -> EfiResult<usize> { 31 let mut boot_hart_id: usize = 0; 32 // SAFETY: 33 // `self.interface()?` guarantees `self.interface` is non-null and points to a valid object 34 // established by `Protocol::new()`. 35 // `self.interface` is input parameter and will not be retained. It outlives the call. 36 // `&mut boot_hart_id` is output parameter and will not be retained. It outlives the call. 37 unsafe { 38 efi_call!(self.interface()?.get_boot_hartid, self.interface, &mut boot_hart_id)?; 39 } 40 Ok(boot_hart_id) 41 } 42 revision(&self) -> EfiResult<u64>43 pub fn revision(&self) -> EfiResult<u64> { 44 Ok(self.interface()?.revision) 45 } 46 } 47