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Merge #1312

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1312: Let bootloader partition have read/write/erase operations r=Dirbaio a=rmja

This change should not have any breaking changes.

Co-authored-by: Rasmus Melchior Jacobsen <rmja@laesoe.org>
This commit is contained in:
bors[bot] 2023-04-03 11:49:44 +00:00 committed by GitHub
commit 0909a6cd3f
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 243 additions and 224 deletions
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102
embassy-boot/boot/src/boot_loader.rs
View File

@ -79,7 +79,7 @@ impl BootLoader {
Self { active, dfu, state }
}
/// Return the boot address for the active partition.
/// Return the offset of the active partition into the active flash.
pub fn boot_address(&self) -> usize {
self.active.from
}
@ -193,13 +193,13 @@ impl BootLoader {
self.revert(p, magic, page)?;
// Overwrite magic and reset progress
let fstate = p.state();
let state_flash = p.state();
magic.fill(!P::STATE::ERASE_VALUE);
fstate.write(self.state.from as u32, magic)?;
fstate.erase(self.state.from as u32, self.state.to as u32)?;
self.state.write_blocking(state_flash, 0, magic)?;
self.state.wipe_blocking(state_flash)?;
magic.fill(BOOT_MAGIC);
fstate.write(self.state.from as u32, magic)?;
self.state.write_blocking(state_flash, 0, magic)?;
}
}
Ok(state)
@ -218,9 +218,10 @@ impl BootLoader {
let max_index = ((self.state.len() - write_size) / write_size) - 1;
aligned.fill(!P::STATE::ERASE_VALUE);
let flash = config.state();
let state_flash = config.state();
for i in 0..max_index {
flash.read((self.state.from + write_size + i * write_size) as u32, aligned)?;
self.state
.read_blocking(state_flash, (write_size + i * write_size) as u32, aligned)?;
if aligned.iter().any(|&b| b == P::STATE::ERASE_VALUE) {
return Ok(i);
@ -230,47 +231,39 @@ impl BootLoader {
}
fn update_progress<P: FlashConfig>(&mut self, idx: usize, p: &mut P, magic: &mut [u8]) -> Result<(), BootError> {
let flash = p.state();
let write_size = magic.len();
let w = self.state.from + write_size + idx * write_size;
let aligned = magic;
aligned.fill(!P::STATE::ERASE_VALUE);
flash.write(w as u32, aligned)?;
self.state
.write_blocking(p.state(), (write_size + idx * write_size) as u32, aligned)?;
Ok(())
}
fn active_addr(&self, n: usize, page_size: usize) -> usize {
self.active.from + n * page_size
}
fn dfu_addr(&self, n: usize, page_size: usize) -> usize {
self.dfu.from + n * page_size
}
fn copy_page_once_to_active<P: FlashConfig>(
&mut self,
idx: usize,
from_page: usize,
to_page: usize,
from_offset: u32,
to_offset: u32,
p: &mut P,
magic: &mut [u8],
page: &mut [u8],
) -> Result<(), BootError> {
let buf = page;
if self.current_progress(p, magic)? <= idx {
let mut offset = from_page;
let mut offset = from_offset;
for chunk in buf.chunks_mut(P::DFU::BLOCK_SIZE) {
p.dfu().read(offset as u32, chunk)?;
offset += chunk.len();
self.dfu.read_blocking(p.dfu(), offset, chunk)?;
offset += chunk.len() as u32;
}
p.active().erase(to_page as u32, (to_page + buf.len()) as u32)?;
self.active
.erase_blocking(p.active(), to_offset, to_offset + buf.len() as u32)?;
let mut offset = to_page;
let mut offset = to_offset;
for chunk in buf.chunks(P::ACTIVE::BLOCK_SIZE) {
p.active().write(offset as u32, chunk)?;
offset += chunk.len();
self.active.write_blocking(p.active(), offset, chunk)?;
offset += chunk.len() as u32;
}
self.update_progress(idx, p, magic)?;
}
@ -280,26 +273,27 @@ impl BootLoader {
fn copy_page_once_to_dfu<P: FlashConfig>(
&mut self,
idx: usize,
from_page: usize,
to_page: usize,
from_offset: u32,
to_offset: u32,
p: &mut P,
magic: &mut [u8],
page: &mut [u8],
) -> Result<(), BootError> {
let buf = page;
if self.current_progress(p, magic)? <= idx {
let mut offset = from_page;
let mut offset = from_offset;
for chunk in buf.chunks_mut(P::ACTIVE::BLOCK_SIZE) {
p.active().read(offset as u32, chunk)?;
offset += chunk.len();
self.active.read_blocking(p.active(), offset, chunk)?;
offset += chunk.len() as u32;
}
p.dfu().erase(to_page as u32, (to_page + buf.len()) as u32)?;
self.dfu
.erase_blocking(p.dfu(), to_offset as u32, to_offset + buf.len() as u32)?;
let mut offset = to_page;
let mut offset = to_offset;
for chunk in buf.chunks(P::DFU::BLOCK_SIZE) {
p.dfu().write(offset as u32, chunk)?;
offset += chunk.len();
self.dfu.write_blocking(p.dfu(), offset, chunk)?;
offset += chunk.len() as u32;
}
self.update_progress(idx, p, magic)?;
}
@ -312,17 +306,20 @@ impl BootLoader {
trace!("Page count: {}", page_count);
for page_num in 0..page_count {
trace!("COPY PAGE {}", page_num);
let idx = page_num * 2;
// Copy active page to the 'next' DFU page.
let active_page = self.active_addr(page_count - 1 - page_num, page_size);
let dfu_page = self.dfu_addr(page_count - page_num, page_size);
//trace!("Copy active {} to dfu {}", active_page, dfu_page);
self.copy_page_once_to_dfu(page_num * 2, active_page, dfu_page, p, magic, page)?;
let active_from_offset = ((page_count - 1 - page_num) * page_size) as u32;
let dfu_to_offset = ((page_count - page_num) * page_size) as u32;
//trace!("Copy active {} to dfu {}", active_from_offset, dfu_to_offset);
self.copy_page_once_to_dfu(idx, active_from_offset, dfu_to_offset, p, magic, page)?;
// Copy DFU page to the active page
let active_page = self.active_addr(page_count - 1 - page_num, page_size);
let dfu_page = self.dfu_addr(page_count - 1 - page_num, page_size);
//trace!("Copy dfy {} to active {}", dfu_page, active_page);
self.copy_page_once_to_active(page_num * 2 + 1, dfu_page, active_page, p, magic, page)?;
let active_to_offset = ((page_count - 1 - page_num) * page_size) as u32;
let dfu_from_offset = ((page_count - 1 - page_num) * page_size) as u32;
//trace!("Copy dfy {} to active {}", dfu_from_offset, active_to_offset);
self.copy_page_once_to_active(idx + 1, dfu_from_offset, active_to_offset, p, magic, page)?;
}
Ok(())
@ -332,23 +329,24 @@ impl BootLoader {
let page_size = page.len();
let page_count = self.active.len() / page_size;
for page_num in 0..page_count {
let idx = page_count * 2 + page_num * 2;
// Copy the bad active page to the DFU page
let active_page = self.active_addr(page_num, page_size);
let dfu_page = self.dfu_addr(page_num, page_size);
self.copy_page_once_to_dfu(page_count * 2 + page_num * 2, active_page, dfu_page, p, magic, page)?;
let active_from_offset = (page_num * page_size) as u32;
let dfu_to_offset = (page_num * page_size) as u32;
self.copy_page_once_to_dfu(idx, active_from_offset, dfu_to_offset, p, magic, page)?;
// Copy the DFU page back to the active page
let active_page = self.active_addr(page_num, page_size);
let dfu_page = self.dfu_addr(page_num + 1, page_size);
self.copy_page_once_to_active(page_count * 2 + page_num * 2 + 1, dfu_page, active_page, p, magic, page)?;
let active_to_offset = (page_num * page_size) as u32;
let dfu_from_offset = ((page_num + 1) * page_size) as u32;
self.copy_page_once_to_active(idx + 1, dfu_from_offset, active_to_offset, p, magic, page)?;
}
Ok(())
}
fn read_state<P: FlashConfig>(&mut self, config: &mut P, magic: &mut [u8]) -> Result<State, BootError> {
let flash = config.state();
flash.read(self.state.from as u32, magic)?;
self.state.read_blocking(config.state(), 0, magic)?;
if !magic.iter().any(|&b| b != SWAP_MAGIC) {
Ok(State::Swap)

174
embassy-boot/boot/src/firmware_updater.rs
View File

@ -84,10 +84,10 @@ impl FirmwareUpdater {
/// `mark_booted`.
pub async fn get_state<F: AsyncNorFlash>(
&mut self,
flash: &mut F,
state_flash: &mut F,
aligned: &mut [u8],
) -> Result<State, FirmwareUpdaterError> {
flash.read(self.state.from as u32, aligned).await?;
self.state.read(state_flash, 0, aligned).await?;
if !aligned.iter().any(|&b| b != SWAP_MAGIC) {
Ok(State::Swap)
@ -115,17 +115,16 @@ impl FirmwareUpdater {
#[cfg(feature = "_verify")]
pub async fn verify_and_mark_updated<F: AsyncNorFlash>(
&mut self,
_flash: &mut F,
_state_and_dfu_flash: &mut F,
_public_key: &[u8],
_signature: &[u8],
_update_len: usize,
_aligned: &mut [u8],
) -> Result<(), FirmwareUpdaterError> {
let _end = self.dfu.from + _update_len;
let _read_size = _aligned.len();
assert_eq!(_aligned.len(), F::WRITE_SIZE);
assert!(_end <= self.dfu.to);
assert!(_update_len <= self.dfu.len());
#[cfg(feature = "ed25519-dalek")]
{
@ -137,21 +136,10 @@ impl FirmwareUpdater {
let signature = Signature::from_bytes(_signature).map_err(into_signature_error)?;
let mut digest = Sha512::new();
let mut offset = self.dfu.from;
let last_offset = _end / _read_size * _read_size;
while offset < last_offset {
_flash.read(offset as u32, _aligned).await?;
digest.update(&_aligned);
offset += _read_size;
}
let remaining = _end % _read_size;
if remaining > 0 {
_flash.read(last_offset as u32, _aligned).await?;
digest.update(&_aligned[0..remaining]);
for offset in (0.._update_len).step_by(_aligned.len()) {
self.dfu.read(_state_and_dfu_flash, offset as u32, _aligned).await?;
let len = core::cmp::min(_update_len - offset, _aligned.len());
digest.update(&_aligned[..len]);
}
public_key
@ -173,21 +161,10 @@ impl FirmwareUpdater {
let signature = Signature::try_from(&signature).map_err(into_signature_error)?;
let mut digest = Sha512::new();
let mut offset = self.dfu.from;
let last_offset = _end / _read_size * _read_size;
while offset < last_offset {
_flash.read(offset as u32, _aligned).await?;
digest.update(&_aligned);
offset += _read_size;
}
let remaining = _end % _read_size;
if remaining > 0 {
_flash.read(last_offset as u32, _aligned).await?;
digest.update(&_aligned[0..remaining]);
for offset in (0.._update_len).step_by(_aligned.len()) {
self.dfu.read(_state_and_dfu_flash, offset as u32, _aligned).await?;
let len = core::cmp::min(_update_len - offset, _aligned.len());
digest.update(&_aligned[..len]);
}
let message = digest.finalize();
@ -202,7 +179,7 @@ impl FirmwareUpdater {
r.map_err(into_signature_error)?
}
self.set_magic(_aligned, SWAP_MAGIC, _flash).await
self.set_magic(_aligned, SWAP_MAGIC, _state_and_dfu_flash).await
}
/// Mark to trigger firmware swap on next boot.
@ -213,11 +190,11 @@ impl FirmwareUpdater {
#[cfg(not(feature = "_verify"))]
pub async fn mark_updated<F: AsyncNorFlash>(
&mut self,
flash: &mut F,
state_flash: &mut F,
aligned: &mut [u8],
) -> Result<(), FirmwareUpdaterError> {
assert_eq!(aligned.len(), F::WRITE_SIZE);
self.set_magic(aligned, SWAP_MAGIC, flash).await
self.set_magic(aligned, SWAP_MAGIC, state_flash).await
}
/// Mark firmware boot successful and stop rollback on reset.
@ -227,29 +204,29 @@ impl FirmwareUpdater {
/// The `aligned` buffer must have a size of F::WRITE_SIZE, and follow the alignment rules for the flash being written to.
pub async fn mark_booted<F: AsyncNorFlash>(
&mut self,
flash: &mut F,
state_flash: &mut F,
aligned: &mut [u8],
) -> Result<(), FirmwareUpdaterError> {
assert_eq!(aligned.len(), F::WRITE_SIZE);
self.set_magic(aligned, BOOT_MAGIC, flash).await
self.set_magic(aligned, BOOT_MAGIC, state_flash).await
}
async fn set_magic<F: AsyncNorFlash>(
&mut self,
aligned: &mut [u8],
magic: u8,
flash: &mut F,
state_flash: &mut F,
) -> Result<(), FirmwareUpdaterError> {
flash.read(self.state.from as u32, aligned).await?;
self.state.read(state_flash, 0, aligned).await?;
if aligned.iter().any(|&b| b != magic) {
aligned.fill(0);
flash.write(self.state.from as u32, aligned).await?;
flash.erase(self.state.from as u32, self.state.to as u32).await?;
self.state.write(state_flash, 0, aligned).await?;
self.state.wipe(state_flash).await?;
aligned.fill(magic);
flash.write(self.state.from as u32, aligned).await?;
self.state.write(state_flash, 0, aligned).await?;
}
Ok(())
}
@ -265,26 +242,17 @@ impl FirmwareUpdater {
&mut self,
offset: usize,
data: &[u8],
flash: &mut F,
dfu_flash: &mut F,
block_size: usize,
) -> Result<(), FirmwareUpdaterError> {
assert!(data.len() >= F::ERASE_SIZE);
flash
.erase(
(self.dfu.from + offset) as u32,
(self.dfu.from + offset + data.len()) as u32,
)
self.dfu
.erase(dfu_flash, offset as u32, (offset + data.len()) as u32)
.await?;
trace!(
"Erased from {} to {}",
self.dfu.from + offset,
self.dfu.from + offset + data.len()
);
FirmwareWriter(self.dfu)
.write_block(offset, data, flash, block_size)
.write_block(offset, data, dfu_flash, block_size)
.await?;
Ok(())
@ -297,11 +265,9 @@ impl FirmwareUpdater {
/// exchange for added complexity.
pub async fn prepare_update<F: AsyncNorFlash>(
&mut self,
flash: &mut F,
dfu_flash: &mut F,
) -> Result<FirmwareWriter, FirmwareUpdaterError> {
flash.erase((self.dfu.from) as u32, (self.dfu.to) as u32).await?;
trace!("Erased from {} to {}", self.dfu.from, self.dfu.to);
self.dfu.wipe(dfu_flash).await?;
Ok(FirmwareWriter(self.dfu))
}
@ -317,10 +283,10 @@ impl FirmwareUpdater {
/// `mark_booted`.
pub fn get_state_blocking<F: NorFlash>(
&mut self,
flash: &mut F,
state_flash: &mut F,
aligned: &mut [u8],
) -> Result<State, FirmwareUpdaterError> {
flash.read(self.state.from as u32, aligned)?;
self.state.read_blocking(state_flash, 0, aligned)?;
if !aligned.iter().any(|&b| b != SWAP_MAGIC) {
Ok(State::Swap)
@ -348,7 +314,7 @@ impl FirmwareUpdater {
#[cfg(feature = "_verify")]
pub fn verify_and_mark_updated_blocking<F: NorFlash>(
&mut self,
_flash: &mut F,
_state_and_dfu_flash: &mut F,
_public_key: &[u8],
_signature: &[u8],
_update_len: usize,
@ -370,21 +336,10 @@ impl FirmwareUpdater {
let signature = Signature::from_bytes(_signature).map_err(into_signature_error)?;
let mut digest = Sha512::new();
let mut offset = self.dfu.from;
let last_offset = _end / _read_size * _read_size;
while offset < last_offset {
_flash.read(offset as u32, _aligned)?;
digest.update(&_aligned);
offset += _read_size;
}
let remaining = _end % _read_size;
if remaining > 0 {
_flash.read(last_offset as u32, _aligned)?;
digest.update(&_aligned[0..remaining]);
for offset in (0.._update_len).step_by(_aligned.len()) {
self.dfu.read_blocking(_state_and_dfu_flash, offset as u32, _aligned)?;
let len = core::cmp::min(_update_len - offset, _aligned.len());
digest.update(&_aligned[..len]);
}
public_key
@ -406,21 +361,10 @@ impl FirmwareUpdater {
let signature = Signature::try_from(&signature).map_err(into_signature_error)?;
let mut digest = Sha512::new();
let mut offset = self.dfu.from;
let last_offset = _end / _read_size * _read_size;
while offset < last_offset {
_flash.read(offset as u32, _aligned)?;
digest.update(&_aligned);
offset += _read_size;
}
let remaining = _end % _read_size;
if remaining > 0 {
_flash.read(last_offset as u32, _aligned)?;
digest.update(&_aligned[0..remaining]);
for offset in (0.._update_len).step_by(_aligned.len()) {
self.dfu.read_blocking(_state_and_dfu_flash, offset as u32, _aligned)?;
let len = core::cmp::min(_update_len - offset, _aligned.len());
digest.update(&_aligned[..len]);
}
let message = digest.finalize();
@ -435,7 +379,7 @@ impl FirmwareUpdater {
r.map_err(into_signature_error)?
}
self.set_magic_blocking(_aligned, SWAP_MAGIC, _flash)
self.set_magic_blocking(_aligned, SWAP_MAGIC, _state_and_dfu_flash)
}
/// Mark to trigger firmware swap on next boot.
@ -446,11 +390,11 @@ impl FirmwareUpdater {
#[cfg(not(feature = "_verify"))]
pub fn mark_updated_blocking<F: NorFlash>(
&mut self,
flash: &mut F,
state_flash: &mut F,
aligned: &mut [u8],
) -> Result<(), FirmwareUpdaterError> {
assert_eq!(aligned.len(), F::WRITE_SIZE);
self.set_magic_blocking(aligned, SWAP_MAGIC, flash)
self.set_magic_blocking(aligned, SWAP_MAGIC, state_flash)
}
/// Mark firmware boot successful and stop rollback on reset.
@ -460,29 +404,29 @@ impl FirmwareUpdater {
/// The `aligned` buffer must have a size of F::WRITE_SIZE, and follow the alignment rules for the flash being written to.
pub fn mark_booted_blocking<F: NorFlash>(
&mut self,
flash: &mut F,
state_flash: &mut F,
aligned: &mut [u8],
) -> Result<(), FirmwareUpdaterError> {
assert_eq!(aligned.len(), F::WRITE_SIZE);
self.set_magic_blocking(aligned, BOOT_MAGIC, flash)
self.set_magic_blocking(aligned, BOOT_MAGIC, state_flash)
}
fn set_magic_blocking<F: NorFlash>(
&mut self,
aligned: &mut [u8],
magic: u8,
flash: &mut F,
state_flash: &mut F,
) -> Result<(), FirmwareUpdaterError> {
flash.read(self.state.from as u32, aligned)?;
self.state.read_blocking(state_flash, 0, aligned)?;
if aligned.iter().any(|&b| b != magic) {
aligned.fill(0);
flash.write(self.state.from as u32, aligned)?;
flash.erase(self.state.from as u32, self.state.to as u32)?;
self.state.write_blocking(state_flash, 0, aligned)?;
self.state.wipe_blocking(state_flash)?;
aligned.fill(magic);
flash.write(self.state.from as u32, aligned)?;
self.state.write_blocking(state_flash, 0, aligned)?;
}
Ok(())
}
@ -498,23 +442,15 @@ impl FirmwareUpdater {
&mut self,
offset: usize,
data: &[u8],
flash: &mut F,
dfu_flash: &mut F,
block_size: usize,
) -> Result<(), FirmwareUpdaterError> {
assert!(data.len() >= F::ERASE_SIZE);
flash.erase(
(self.dfu.from + offset) as u32,
(self.dfu.from + offset + data.len()) as u32,
)?;
self.dfu
.erase_blocking(dfu_flash, offset as u32, (offset + data.len()) as u32)?;
trace!(
"Erased from {} to {}",
self.dfu.from + offset,
self.dfu.from + offset + data.len()
);
FirmwareWriter(self.dfu).write_block_blocking(offset, data, flash, block_size)?;
FirmwareWriter(self.dfu).write_block_blocking(offset, data, dfu_flash, block_size)?;
Ok(())
}
@ -528,9 +464,7 @@ impl FirmwareUpdater {
&mut self,
flash: &mut F,
) -> Result<FirmwareWriter, FirmwareUpdaterError> {
flash.erase((self.dfu.from) as u32, (self.dfu.to) as u32)?;
trace!("Erased from {} to {}", self.dfu.from, self.dfu.to);
self.dfu.wipe_blocking(flash)?;
Ok(FirmwareWriter(self.dfu))
}

54
embassy-boot/boot/src/firmware_writer.rs
View File

@ -21,32 +21,11 @@ impl FirmwareWriter {
flash: &mut F,
block_size: usize,
) -> Result<(), F::Error> {
trace!(
"Writing firmware at offset 0x{:x} len {}",
self.0.from + offset,
data.len()
);
let mut write_offset = self.0.from + offset;
let mut offset = offset as u32;
for chunk in data.chunks(block_size) {
trace!("Wrote chunk at {}: {:?}", write_offset, chunk);
flash.write(write_offset as u32, chunk).await?;
write_offset += chunk.len();
self.0.write(flash, offset, chunk).await?;
offset += chunk.len() as u32;
}
/*
trace!("Wrote data, reading back for verification");
let mut buf: [u8; 4096] = [0; 4096];
let mut data_offset = 0;
let mut read_offset = self.dfu.from + offset;
for chunk in buf.chunks_mut(block_size) {
flash.read(read_offset as u32, chunk).await?;
trace!("Read chunk at {}: {:?}", read_offset, chunk);
assert_eq!(&data[data_offset..data_offset + block_size], chunk);
read_offset += chunk.len();
data_offset += chunk.len();
}
*/
Ok(())
}
@ -65,32 +44,11 @@ impl FirmwareWriter {
flash: &mut F,
block_size: usize,
) -> Result<(), F::Error> {
trace!(
"Writing firmware at offset 0x{:x} len {}",
self.0.from + offset,
data.len()
);
let mut write_offset = self.0.from + offset;
let mut offset = offset as u32;
for chunk in data.chunks(block_size) {
trace!("Wrote chunk at {}: {:?}", write_offset, chunk);
flash.write(write_offset as u32, chunk)?;
write_offset += chunk.len();
self.0.write_blocking(flash, offset, chunk)?;
offset += chunk.len() as u32;
}
/*
trace!("Wrote data, reading back for verification");
let mut buf: [u8; 4096] = [0; 4096];
let mut data_offset = 0;
let mut read_offset = self.dfu.from + offset;
for chunk in buf.chunks_mut(block_size) {
flash.read(read_offset as u32, chunk).await?;
trace!("Read chunk at {}: {:?}", read_offset, chunk);
assert_eq!(&data[data_offset..data_offset + block_size], chunk);
read_offset += chunk.len();
data_offset += chunk.len();
}
*/
Ok(())
}

3
embassy-boot/boot/src/lib.rs
View File

@ -313,7 +313,8 @@ mod tests {
))
.is_ok());
}
struct MemFlash<const SIZE: usize, const ERASE_SIZE: usize, const WRITE_SIZE: usize>([u8; SIZE]);
pub struct MemFlash<const SIZE: usize, const ERASE_SIZE: usize, const WRITE_SIZE: usize>(pub [u8; SIZE]);
impl<const SIZE: usize, const ERASE_SIZE: usize, const WRITE_SIZE: usize> NorFlash
for MemFlash<SIZE, ERASE_SIZE, WRITE_SIZE>

134
embassy-boot/boot/src/partition.rs
View File

@ -1,10 +1,13 @@
use embedded_storage::nor_flash::{NorFlash, ReadNorFlash};
use embedded_storage_async::nor_flash::{NorFlash as AsyncNorFlash, ReadNorFlash as AsyncReadNorFlash};
/// A region in flash used by the bootloader.
#[derive(Copy, Clone, Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct Partition {
/// Start of the flash region.
/// The offset into the flash where the partition starts.
pub from: usize,
/// End of the flash region.
/// The offset into the flash where the partition ends.
pub to: usize,
}
@ -14,9 +17,134 @@ impl Partition {
Self { from, to }
}
/// Return the length of the partition
/// Return the size of the partition
#[allow(clippy::len_without_is_empty)]
pub const fn len(&self) -> usize {
self.to - self.from
}
/// Read from the partition on the provided flash
pub(crate) async fn read<F: AsyncReadNorFlash>(
&self,
flash: &mut F,
offset: u32,
bytes: &mut [u8],
) -> Result<(), F::Error> {
let offset = self.from as u32 + offset;
flash.read(offset, bytes).await
}
/// Write to the partition on the provided flash
pub(crate) async fn write<F: AsyncNorFlash>(
&self,
flash: &mut F,
offset: u32,
bytes: &[u8],
) -> Result<(), F::Error> {
let offset = self.from as u32 + offset;
flash.write(offset, bytes).await?;
trace!("Wrote from 0x{:x} len {}", offset, bytes.len());
Ok(())
}
/// Erase part of the partition on the provided flash
pub(crate) async fn erase<F: AsyncNorFlash>(&self, flash: &mut F, from: u32, to: u32) -> Result<(), F::Error> {
let from = self.from as u32 + from;
let to = self.from as u32 + to;
flash.erase(from, to).await?;
trace!("Erased from 0x{:x} to 0x{:x}", from, to);
Ok(())
}
/// Erase the entire partition
pub(crate) async fn wipe<F: AsyncNorFlash>(&self, flash: &mut F) -> Result<(), F::Error> {
let from = self.from as u32;
let to = self.to as u32;
flash.erase(from, to).await?;
trace!("Wiped from 0x{:x} to 0x{:x}", from, to);
Ok(())
}
/// Read from the partition on the provided flash
pub(crate) fn read_blocking<F: ReadNorFlash>(
&self,
flash: &mut F,
offset: u32,
bytes: &mut [u8],
) -> Result<(), F::Error> {
let offset = self.from as u32 + offset;
flash.read(offset, bytes)
}
/// Write to the partition on the provided flash
pub(crate) fn write_blocking<F: NorFlash>(&self, flash: &mut F, offset: u32, bytes: &[u8]) -> Result<(), F::Error> {
let offset = self.from as u32 + offset;
flash.write(offset, bytes)?;
trace!("Wrote from 0x{:x} len {}", offset, bytes.len());
Ok(())
}
/// Erase part of the partition on the provided flash
pub(crate) fn erase_blocking<F: NorFlash>(&self, flash: &mut F, from: u32, to: u32) -> Result<(), F::Error> {
let from = self.from as u32 + from;
let to = self.from as u32 + to;
flash.erase(from, to)?;
trace!("Erased from 0x{:x} to 0x{:x}", from, to);
Ok(())
}
/// Erase the entire partition
pub(crate) fn wipe_blocking<F: NorFlash>(&self, flash: &mut F) -> Result<(), F::Error> {
let from = self.from as u32;
let to = self.to as u32;
flash.erase(from, to)?;
trace!("Wiped from 0x{:x} to 0x{:x}", from, to);
Ok(())
}
}
#[cfg(test)]
mod tests {
use crate::tests::MemFlash;
use crate::Partition;
#[test]
fn can_erase() {
let mut flash = MemFlash::<1024, 64, 4>([0x00; 1024]);
let partition = Partition::new(256, 512);
partition.erase_blocking(&mut flash, 64, 192).unwrap();
for (index, byte) in flash.0.iter().copied().enumerate().take(256 + 64) {
assert_eq!(0x00, byte, "Index {}", index);
}
for (index, byte) in flash.0.iter().copied().enumerate().skip(256 + 64).take(128) {
assert_eq!(0xFF, byte, "Index {}", index);
}
for (index, byte) in flash.0.iter().copied().enumerate().skip(256 + 64 + 128) {
assert_eq!(0x00, byte, "Index {}", index);
}
}
#[test]
fn can_wipe() {
let mut flash = MemFlash::<1024, 64, 4>([0x00; 1024]);
let partition = Partition::new(256, 512);
partition.wipe_blocking(&mut flash).unwrap();
for (index, byte) in flash.0.iter().copied().enumerate().take(256) {
assert_eq!(0x00, byte, "Index {}", index);
}
for (index, byte) in flash.0.iter().copied().enumerate().skip(256).take(256) {
assert_eq!(0xFF, byte, "Index {}", index);
}
for (index, byte) in flash.0.iter().copied().enumerate().skip(512) {
assert_eq!(0x00, byte, "Index {}", index);
}
}
}