-
Notifications
You must be signed in to change notification settings - Fork 113
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
stage0_tdx org: Extract serial code to module
No changes yet, but this keeps the serial code organized, so we can eventually replace it with stage0::hal implementation. Tested: Run the oak-containers-test.sh run tdx script, observed that it reached the stage where it fails to bring up secondary CPUs. Bug: b/366205978 Change-Id: Ibe5cb263d19c18d43a0ee6d70cd21ed9f1c42d5f
- Loading branch information
Showing
2 changed files
with
155 additions
and
119 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| // | ||
| // Copyright 2024 The Project Oak Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
|
|
||
| use oak_stage0::hal::PortFactory; | ||
| use oak_tdx_guest::vmcall::{ | ||
| io_read_u16, io_read_u32, io_read_u8, io_write_u16, io_write_u32, io_write_u8, | ||
| }; | ||
|
|
||
| /// Creates a new [`PortFactory`] using the stage0 HAL interface. | ||
| pub fn port_factory() -> PortFactory { | ||
| PortFactory { | ||
| read_u8: |port| io_read_u8(port as u32), | ||
| read_u16: |port| io_read_u16(port as u32), | ||
| read_u32: |port| io_read_u32(port as u32), | ||
| write_u8: |port, val| io_write_u8(port as u32, val), | ||
| write_u16: |port, val| io_write_u16(port as u32, val), | ||
| write_u32: |port, val| io_write_u32(port as u32, val), | ||
| } | ||
| } | ||
|
|
||
| fn write_u8_to_serial(c: u8) { | ||
| // wait_for_empty_output | ||
| loop { | ||
| if (io_read_u8(0x3f8 + 0x5).unwrap() & (1 << 5)) != 0 { | ||
| break; | ||
| } | ||
| } | ||
| io_write_u8(0x3f8, c).unwrap(); | ||
| } | ||
|
|
||
| fn write_single_hex(c: u8) { | ||
| if c < 0xa { | ||
| write_u8_to_serial(c + (b'0')); | ||
| } else { | ||
| write_u8_to_serial(c - 10 + (b'a')); | ||
| } | ||
| } | ||
|
|
||
| fn write_byte_hex(c: u8) { | ||
| let char1 = (c >> 4) & 0xF; | ||
| let char2 = c & 0xF; | ||
| write_single_hex(char1); | ||
| write_single_hex(char2); | ||
| } | ||
|
|
||
| fn write_bytes_hex(bytes: &[u8]) { | ||
| for c in bytes.iter().rev() { | ||
| write_byte_hex(*c); | ||
| } | ||
| } | ||
|
|
||
| pub fn init_tdx_serial_port() { | ||
| io_write_u8(0x3f8 + 0x1, 0x0).unwrap(); // Disable interrupts | ||
| io_write_u8(0x3f8 + 0x2, 0x0).unwrap(); // Disable FIFO | ||
| io_write_u8(0x3f8 + 0x3, 0x3).unwrap(); // LINE_CONTROL_8N1 | ||
| io_write_u8(0x3f8 + 0x4, 0x3).unwrap(); // DATA_TERMINAL_READY_AND_REQUEST_TO_SEND | ||
| } | ||
|
|
||
| pub trait Debug { | ||
| fn debug(&self); | ||
| } | ||
|
|
||
| impl Debug for u32 { | ||
| fn debug(&self) { | ||
| self.to_le_bytes().as_slice().debug(); | ||
| } | ||
| } | ||
|
|
||
| impl Debug for u64 { | ||
| fn debug(&self) { | ||
| self.to_le_bytes().as_slice().debug(); | ||
| } | ||
| } | ||
|
|
||
| impl Debug for &str { | ||
| fn debug(&self) { | ||
| for c in self.bytes() { | ||
| write_u8_to_serial(c); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Debug for &[u8] { | ||
| fn debug(&self) { | ||
| "0x".debug(); | ||
| write_bytes_hex(&self) | ||
| } | ||
| } | ||
|
|
||
| /// Output the provided arguments to the command line. | ||
| /// In order to be written, a type should implement the `Debug` trait | ||
| /// | ||
| /// If you cast to a `str`, the bytes will be written as characters. | ||
| /// If you cast to a `&[u8]`, the hex representation of the bytes will be | ||
| /// written. | ||
| macro_rules! debug { | ||
| ($($arg:expr),*) => { | ||
| $($arg.debug();)* | ||
| "\n".debug(); | ||
| }; | ||
| } | ||
|
|
||
| pub(crate) use debug; |