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libconfig: refactored load_pl into bootgen 

Now allows loading firmware.
This commit is contained in:
pca006132 2020-09-01 14:03:58 +08:00
parent afecc83ecf
commit eb78e4e2da
2 changed files with 78 additions and 71 deletions
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121
src/libconfig/src/load_pl.rs → src/libconfig/src/bootgen.rs
View File

@ -1,46 +1,38 @@
use super::sd_reader;
use alloc::vec::Vec;
use core_io::{Error, Read, Seek, SeekFrom};
use libboard_zynq::{devc, sdio};
use log::{info, debug};
use libboard_zynq::devc;
use log::debug;
#[derive(Debug)]
pub enum PlLoadingError {
BootImageNotFound,
pub enum BootgenLoadingError {
InvalidBootImageHeader,
MissingBitstreamPartition,
MissingPartition,
EncryptedBitstream,
IoError(Error),
DevcError(devc::DevcError),
}
impl From<Error> for PlLoadingError {
impl From<Error> for BootgenLoadingError {
fn from(error: Error) -> Self {
PlLoadingError::IoError(error)
BootgenLoadingError::IoError(error)
}
}
impl From<devc::DevcError> for PlLoadingError {
impl From<devc::DevcError> for BootgenLoadingError {
fn from(error: devc::DevcError) -> Self {
PlLoadingError::DevcError(error)
BootgenLoadingError::DevcError(error)
}
}
impl core::fmt::Display for PlLoadingError {
impl core::fmt::Display for BootgenLoadingError {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
use PlLoadingError::*;
use BootgenLoadingError::*;
match self {
BootImageNotFound => write!(
f,
"Boot image not found, make sure `boot.bin` exists and your SD card is plugged in."
),
InvalidBootImageHeader => write!(
f,
"Invalid boot image header. Check if the file is correct."
),
MissingBitstreamPartition => write!(
f,
"Bitstream partition not found. Check your compile configuration."
),
MissingPartition => write!(f, "Partition not found. Check your compile configuration."),
EncryptedBitstream => write!(f, "Encrypted bitstream is not supported."),
IoError(e) => write!(f, "Error while reading: {}", e),
DevcError(e) => write!(f, "PCAP interface error: {}", e),
@ -66,7 +58,7 @@ struct PartitionHeader {
}
/// Read a u32 word from the reader.
fn read_u32<Reader: Read>(reader: &mut Reader) -> Result<u32, PlLoadingError> {
fn read_u32<Reader: Read>(reader: &mut Reader) -> Result<u32, BootgenLoadingError> {
let mut buffer: [u8; 4] = [0; 4];
reader.read_exact(&mut buffer)?;
let mut result: u32 = 0;
@ -79,7 +71,7 @@ fn read_u32<Reader: Read>(reader: &mut Reader) -> Result<u32, PlLoadingError> {
/// Load PL partition header.
fn load_pl_header<File: Read + Seek>(
file: &mut File,
) -> Result<Option<PartitionHeader>, PlLoadingError> {
) -> Result<Option<PartitionHeader>, BootgenLoadingError> {
let mut buffer: [u8; 0x40] = [0; 0x40];
file.read_exact(&mut buffer)?;
let header = unsafe { core::mem::transmute::<_, PartitionHeader>(buffer) };
@ -90,56 +82,75 @@ fn load_pl_header<File: Read + Seek>(
}
}
/// Locate the PL bitstream from the image, and return the size (in bytes) of the bitstream if successful.
/// This function would seek the file to the location of the bitstream.
fn locate_bitstream<File: Read + Seek>(file: &mut File) -> Result<usize, PlLoadingError> {
fn load_ps_header<File: Read + Seek>(
file: &mut File,
) -> Result<Option<PartitionHeader>, BootgenLoadingError> {
let mut buffer: [u8; 0x40] = [0; 0x40];
file.read_exact(&mut buffer)?;
let header = unsafe { core::mem::transmute::<_, PartitionHeader>(buffer) };
if header.attribute_bits & (1 << 4) != 0 {
Ok(Some(header))
} else {
Ok(None)
}
}
/// Locate the partition from the image, and return the size (in bytes) of the partition if successful.
/// This function would seek the file to the location of the partition.
fn locate<
File: Read + Seek,
F: Fn(&mut File) -> Result<Option<PartitionHeader>, BootgenLoadingError>,
>(
file: &mut File,
f: F,
) -> Result<usize, BootgenLoadingError> {
file.seek(SeekFrom::Start(0))?;
const BOOT_HEADER_SIGN: u32 = 0x584C4E58;
// read boot header signature
file.seek(SeekFrom::Start(0x24))?;
if read_u32(file)? != BOOT_HEADER_SIGN {
return Err(PlLoadingError::InvalidBootImageHeader);
return Err(BootgenLoadingError::InvalidBootImageHeader);
}
// find fsbl offset
file.seek(SeekFrom::Start(0x30))?;
// the length is in bytes, we have to convert it to words to compare with the partition offset
// later
let fsbl = read_u32(file)? / 4;
// read partition header offset
file.seek(SeekFrom::Start(0x9C))?;
let ptr = read_u32(file)?;
debug!("Partition header pointer = {:0X}", ptr);
file.seek(SeekFrom::Start(ptr as u64))?;
let mut header_opt = None;
// at most 3 partition headers
for _ in 0..3 {
let result = load_pl_header(file)?;
if let Some(h) = result {
header_opt = Some(h);
break;
}
}
let header = match header_opt {
None => return Err(PlLoadingError::MissingBitstreamPartition),
Some(h) => h,
};
if let Some(header) = f(file)? {
let encrypted_length = header.encrypted_length;
let unencrypted_length = header.unencrypted_length;
debug!("Unencrypted length = {:0X}", unencrypted_length);
if encrypted_length != unencrypted_length {
return Err(PlLoadingError::EncryptedBitstream);
return Err(BootgenLoadingError::EncryptedBitstream);
}
let start_addr = header.data_offset;
// skip fsbl
if start_addr == fsbl {
continue;
}
debug!("Partition start address: {:0X}", start_addr);
file.seek(SeekFrom::Start(start_addr as u64 * 4))?;
Ok(unencrypted_length as usize * 4)
return Ok(unencrypted_length as usize * 4);
}
}
Err(BootgenLoadingError::MissingPartition)
}
/// Load bitstream from bootgen file.
/// This function parses the file, locate the bitstream and load it through the PCAP driver.
/// It requires a large buffer, please enable the DDR RAM before using it.
pub fn load_bitstream<File: Read + Seek>(
file: &mut File,
) -> Result<(), PlLoadingError> {
let size = locate_bitstream(file)?;
pub fn load_bitstream<File: Read + Seek>(file: &mut File) -> Result<(), BootgenLoadingError> {
let size = locate(file, load_pl_header)?;
unsafe {
// align to 64 bytes
let ptr = alloc::alloc::alloc(alloc::alloc::Layout::from_size_align(size, 64).unwrap());
@ -159,20 +170,12 @@ pub fn load_bitstream<File: Read + Seek>(
}
}
pub fn load_bitstream_from_sd() -> Result<(), PlLoadingError> {
let sdio0 = sdio::Sdio::sdio0(true);
if sdio0.is_card_inserted() {
info!("Card inserted. Mounting file system.");
let sd = sdio::sd_card::SdCard::from_sdio(sdio0).unwrap();
let reader = sd_reader::SdReader::new(sd);
let fs = reader.mount_fatfs(sd_reader::PartitionEntry::Entry1)?;
let root_dir = fs.root_dir();
let mut file = root_dir.open_file("/BOOT.BIN").map_err(|_| PlLoadingError::BootImageNotFound)?;
info!("Found boot image!");
load_bitstream(&mut file)
} else {
info!("SD card not inserted. Bitstream cannot be loaded.");
Err(PlLoadingError::BootImageNotFound)
pub fn get_runtime<File: Read + Seek>(file: &mut File) -> Result<Vec<u8>, BootgenLoadingError> {
let size = locate(file, load_ps_header)?;
let mut buffer = Vec::with_capacity(size);
unsafe {
buffer.set_len(size);
}
file.read_exact(&mut buffer)?;
Ok(buffer)
}

12
src/libconfig/src/lib.rs
View File

@ -2,13 +2,13 @@
extern crate alloc;
use core::fmt;
use alloc::{string::FromUtf8Error, string::String, vec::Vec};
use alloc::{string::FromUtf8Error, string::String, vec::Vec, rc::Rc};
use core_io::{self as io, BufRead, BufReader, Read};
use libboard_zynq::sdio;
pub mod sd_reader;
pub mod net_settings;
pub mod load_pl;
pub mod bootgen;
#[derive(Debug)]
pub enum Error<'a> {
@ -68,7 +68,7 @@ fn parse_config<'a>(
}
pub struct Config {
fs: Option<fatfs::FileSystem<sd_reader::SdReader>>,
fs: Option<Rc<fatfs::FileSystem<sd_reader::SdReader>>>,
}
impl Config {
@ -81,7 +81,11 @@ impl Config {
let reader = sd_reader::SdReader::new(sd);
let fs = reader.mount_fatfs(sd_reader::PartitionEntry::Entry1)?;
Ok(Config { fs: Some(fs) })
Ok(Config { fs: Some(Rc::new(fs)) })
}
pub fn from_fs(fs: Option<Rc<fatfs::FileSystem<sd_reader::SdReader>>>) -> Self {
Config { fs }
}
pub fn new_dummy() -> Self {