add support for loading bitstream from bootimage.

This commit is contained in:
pca006132 2020-06-16 17:22:11 +08:00
parent f9ccf908dd
commit 0dc0bb391d
Signed by: pca006132
GPG Key ID: 16997BD76CECCA4C
5 changed files with 192 additions and 12 deletions

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@ -15,7 +15,7 @@ let
version = "0.1.0";
src = ./src;
cargoSha256 = "1xag87szccdq5zwjy3ymq5w5wzbp9vwlz4fvflz0f6wpq94mj04w";
cargoSha256 = "0avqvaa6hryzbcy414ykzfc41hb0yifpkpfcikf9q26ay91af596";
nativeBuildInputs = [
pkgs.gnumake

10
src/Cargo.lock generated
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@ -184,7 +184,7 @@ dependencies = [
[[package]]
name = "libasync"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#a17a5d2925e7e521f31320ccefd7bf3cb61c45a7"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#191da7c959baeb30e31196f2c35b0790ea25cbf6"
dependencies = [
"embedded-hal",
"libcortex_a9",
@ -196,7 +196,7 @@ dependencies = [
[[package]]
name = "libboard_zynq"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#a17a5d2925e7e521f31320ccefd7bf3cb61c45a7"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#191da7c959baeb30e31196f2c35b0790ea25cbf6"
dependencies = [
"bit_field",
"embedded-hal",
@ -212,7 +212,7 @@ dependencies = [
[[package]]
name = "libcortex_a9"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#a17a5d2925e7e521f31320ccefd7bf3cb61c45a7"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#191da7c959baeb30e31196f2c35b0790ea25cbf6"
dependencies = [
"bit_field",
"libregister",
@ -221,7 +221,7 @@ dependencies = [
[[package]]
name = "libregister"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#a17a5d2925e7e521f31320ccefd7bf3cb61c45a7"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#191da7c959baeb30e31196f2c35b0790ea25cbf6"
dependencies = [
"bit_field",
"vcell",
@ -231,7 +231,7 @@ dependencies = [
[[package]]
name = "libsupport_zynq"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#a17a5d2925e7e521f31320ccefd7bf3cb61c45a7"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#191da7c959baeb30e31196f2c35b0790ea25cbf6"
dependencies = [
"compiler_builtins",
"libboard_zynq",

176
src/runtime/src/load_pl.rs Normal file
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@ -0,0 +1,176 @@
use crate::sd_reader;
use core_io::{Error, Read, Seek, SeekFrom};
use libboard_zynq::{devc, sdio};
use log::{info, debug};
#[derive(Debug)]
pub enum PlLoadingError {
BootImageNotFound,
InvalidBootImageHeader,
MissingBitstreamPartition,
EncryptedBitstream,
IoError(Error),
DevcError(devc::DevcError),
}
impl From<Error> for PlLoadingError {
fn from(error: Error) -> Self {
PlLoadingError::IoError(error)
}
}
impl From<devc::DevcError> for PlLoadingError {
fn from(error: devc::DevcError) -> Self {
PlLoadingError::DevcError(error)
}
}
impl core::fmt::Display for PlLoadingError {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
use PlLoadingError::*;
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."
),
EncryptedBitstream => write!(f, "Encrypted bitstream is not supported."),
IoError(e) => write!(f, "Error while reading: {}", e),
DevcError(e) => write!(f, "PCAP interface error: {}", e),
}
}
}
#[repr(C)]
struct PartitionHeader {
pub encrypted_length: u32,
pub unencrypted_length: u32,
pub word_length: u32,
pub dest_load_addr: u32,
pub dest_exec_addr: u32,
pub data_offset: u32,
pub attribute_bits: u32,
pub section_count: u32,
pub checksum_offset: u32,
pub header_offset: u32,
pub cert_offset: u32,
pub reserved: [u32; 4],
pub checksum: u32,
}
/// Read a u32 word from the reader.
fn read_u32<Reader: Read>(reader: &mut Reader) -> Result<u32, PlLoadingError> {
let mut buffer: [u8; 4] = [0; 4];
reader.read_exact(&mut buffer)?;
let mut result: u32 = 0;
for i in 0..4 {
result |= (buffer[i] as u32) << (i * 8);
}
Ok(result)
}
/// Load PL partition header.
fn load_pl_header<File: Read + Seek>(
file: &mut File,
) -> Result<Option<PartitionHeader>, PlLoadingError> {
let mut buffer: [u8; 0x40] = [0; 0x40];
file.read_exact(&mut buffer)?;
let header = unsafe { core::mem::transmute::<_, PartitionHeader>(buffer) };
if header.attribute_bits & (2 << 4) != 0 {
Ok(Some(header))
} else {
Ok(None)
}
}
/// 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> {
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);
}
// 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,
};
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);
}
let start_addr = header.data_offset;
debug!("Partition start address: {:0X}", start_addr);
file.seek(SeekFrom::Start(start_addr as u64 * 4))?;
Ok(unencrypted_length as usize * 4)
}
/// 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)?;
let mut buffer: alloc::vec::Vec<u8> = alloc::vec::Vec::with_capacity(size);
unsafe {
buffer.set_len(buffer.capacity());
}
file.read_exact(&mut buffer)?;
let mut devcfg = devc::DevC::new();
devcfg.enable();
devcfg.program(&buffer)?;
Ok(())
}
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 mut sd = sdio::sd_card::SdCard::from_sdio(sdio0).unwrap();
let reader = sd_reader::SdReader::new(&mut sd);
let fs = reader.mount_fatfs(sd_reader::PartitionEntry::Entry1)?;
let root_dir = fs.root_dir();
for entry in root_dir.iter() {
if let Ok(entry) = entry {
if entry.is_file() && entry.short_file_name() == "BOOT.BIN" {
info!("Found boot image!");
return load_bitstream(&mut entry.to_file());
}
}
}
} else {
info!("SD card not inserted. Bitstream cannot be loaded.")
}
Err(PlLoadingError::BootImageNotFound)
}

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@ -22,7 +22,7 @@ mod pl;
mod rtio;
mod kernel;
mod moninj;
mod load_pl;
fn identifier_read(buf: &mut [u8]) -> &str {
unsafe {
@ -51,15 +51,17 @@ pub fn main_core0() {
Err(error) => info!("failed to read config: {}", error),
}
let devc = devc::DevC::new();
if devc.is_done() {
if devc::DevC::new().is_done() {
info!("gateware already loaded");
// Do not load again: assume that the gateware already present is
// what we want (e.g. gateware configured via JTAG before PS
// startup, or by FSBL).
} else {
info!("loading gateware");
unimplemented!("gateware loading");
// Load from SD card
match load_pl::load_bitstream_from_sd() {
Ok(_) => info!("Bitstream loaded successfully!"),
Err(e) => info!("Failure loading bitstream: {}", e),
}
}
info!("detected gateware: {}", identifier_read(&mut [0; 64]));

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@ -1,6 +1,7 @@
use core_io::{BufRead, Error, ErrorKind, Read, Result as IoResult, Seek, SeekFrom, Write};
use fatfs;
use libboard_zynq::sdio::{sd_card::SdCard, CmdTransferError};
use log::debug;
fn cmd_error_to_io_error(_: CmdTransferError) -> Error {
Error::new(ErrorKind::Other, "Command transfer error")
@ -145,8 +146,9 @@ impl<'a> SdReader<'a> {
// Read partition ID.
self.seek(SeekFrom::Start(entry as u64 + 0x4))?;
self.read_exact(&mut buffer[..1])?;
debug!("Partition ID: {:0X}", buffer[0]);
match buffer[0] {
0x01 | 0x04 | 0x06 | 0x0B => (),
0x01 | 0x04 | 0x06 | 0x0B | 0x0C => (),
_ => {
return Err(Error::new(
ErrorKind::InvalidData,