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runtime: get rid of config_dummy.rs. NFC.

Use the same strategy as elsewhere.
This commit is contained in:
whitequark 2017-10-02 03:20:50 +00:00
parent 73c76ebb9a
commit fd07c3f4d7
3 changed files with 189 additions and 183 deletions

View File

@ -1,192 +1,220 @@
use core::str;
use std::btree_map::BTreeMap;
use byteorder::{ByteOrder, BigEndian};
use board::{mem, csr, cache, spiflash};
#[cfg(has_spiflash)]
mod imp {
use core::str;
use std::btree_map::BTreeMap;
use byteorder::{ByteOrder, BigEndian};
use board::{mem, csr, cache, spiflash};
const ADDR: usize = mem::FLASH_BOOT_ADDRESS + 0x80000 /* max runtime size */;
const SIZE: usize = csr::CONFIG_SPIFLASH_SECTOR_SIZE as usize;
const ADDR: usize = mem::FLASH_BOOT_ADDRESS + 0x80000 /* max runtime size */;
const SIZE: usize = csr::CONFIG_SPIFLASH_SECTOR_SIZE as usize;
mod lock {
use core::slice;
use core::sync::atomic::{AtomicUsize, Ordering};
mod lock {
use core::slice;
use core::sync::atomic::{AtomicUsize, Ordering};
static LOCKED: AtomicUsize = AtomicUsize::new(0);
static LOCKED: AtomicUsize = AtomicUsize::new(0);
pub struct Lock;
pub struct Lock;
impl Lock {
pub fn take() -> Result<Lock, ()> {
if LOCKED.swap(1, Ordering::SeqCst) != 0 {
Err(()) // already locked
} else {
Ok(Lock) // locked now
impl Lock {
pub fn take() -> Result<Lock, ()> {
if LOCKED.swap(1, Ordering::SeqCst) != 0 {
Err(()) // already locked
} else {
Ok(Lock) // locked now
}
}
pub fn data(&self) -> &'static [u8] {
unsafe { slice::from_raw_parts(super::ADDR as *const u8, super::SIZE) }
}
}
pub fn data(&self) -> &'static [u8] {
unsafe { slice::from_raw_parts(super::ADDR as *const u8, super::SIZE) }
}
}
impl Drop for Lock {
fn drop(&mut self) {
LOCKED.store(0, Ordering::SeqCst)
}
}
}
pub use self::lock::Lock;
struct Iter<'a> {
data: &'a [u8],
offset: usize
}
impl<'a> Iter<'a> {
fn new(data: &'a [u8]) -> Iter<'a> {
Iter { data: data, offset: 0 }
}
}
impl<'a> Iterator for Iter<'a> {
type Item = Result<(&'a [u8], &'a [u8]), ()>;
fn next(&mut self) -> Option<Self::Item> {
let data = &self.data[self.offset..];
if data.len() < 4 {
error!("offset {}: truncated record", self.offset);
return Some(Err(()))
}
let record_size = BigEndian::read_u32(data) as usize;
if record_size < 4 {
error!("offset {}: invalid record size", self.offset);
return Some(Err(()))
}
if record_size == !0 /* all ones; erased flash */ {
return None
}
let record_body = &data[4..record_size];
match record_body.iter().position(|&x| x == 0) {
None => {
error!("offset {}: missing separator", self.offset);
Some(Err(()))
}
Some(pos) => {
self.offset += record_size;
let (key, zero_and_value) = record_body.split_at(pos);
Some(Ok((key, &zero_and_value[1..])))
impl Drop for Lock {
fn drop(&mut self) {
LOCKED.store(0, Ordering::SeqCst)
}
}
}
}
pub fn read<F: FnOnce(Result<&[u8], ()>) -> R, R>(key: &str, f: F) -> R {
f(Lock::take().and_then(|lock| {
let mut iter = Iter::new(lock.data());
let mut value = &[][..];
while let Some(result) = iter.next() {
let (record_key, record_value) = result?;
if key.as_bytes() == record_key {
// last write wins
value = record_value
use self::lock::Lock;
struct Iter<'a> {
data: &'a [u8],
offset: usize
}
impl<'a> Iter<'a> {
fn new(data: &'a [u8]) -> Iter<'a> {
Iter { data: data, offset: 0 }
}
}
impl<'a> Iterator for Iter<'a> {
type Item = Result<(&'a [u8], &'a [u8]), ()>;
fn next(&mut self) -> Option<Self::Item> {
let data = &self.data[self.offset..];
if data.len() < 4 {
error!("offset {}: truncated record", self.offset);
return Some(Err(()))
}
let record_size = BigEndian::read_u32(data) as usize;
if record_size < 4 {
error!("offset {}: invalid record size", self.offset);
return Some(Err(()))
}
if record_size == !0 /* all ones; erased flash */ {
return None
}
let record_body = &data[4..record_size];
match record_body.iter().position(|&x| x == 0) {
None => {
error!("offset {}: missing separator", self.offset);
Some(Err(()))
}
Some(pos) => {
self.offset += record_size;
let (key, zero_and_value) = record_body.split_at(pos);
Some(Ok((key, &zero_and_value[1..])))
}
}
}
Ok(value)
}))
}
pub fn read_str<F: FnOnce(Result<&str, ()>) -> R, R>(key: &str, f: F) -> R {
read(key, |result| {
f(result.and_then(|value| str::from_utf8(value).map_err(|_| ())))
})
}
fn append_at(mut offset: usize, key: &[u8], value: &[u8]) -> Result<usize, ()> {
let record_size = 4 + key.len() + 1 + value.len();
if offset + record_size > SIZE {
return Err(())
}
let mut record_size_bytes = [0u8; 4];
BigEndian::write_u32(&mut record_size_bytes[..], record_size as u32);
pub fn read<F: FnOnce(Result<&[u8], ()>) -> R, R>(key: &str, f: F) -> R {
f(Lock::take().and_then(|lock| {
let mut iter = Iter::new(lock.data());
let mut value = &[][..];
while let Some(result) = iter.next() {
let (record_key, record_value) = result?;
if key.as_bytes() == record_key {
// last write wins
value = record_value
}
}
Ok(value)
}))
}
spiflash::write(ADDR + offset, &record_size_bytes[..]);
offset += record_size_bytes.len();
pub fn read_str<F: FnOnce(Result<&str, ()>) -> R, R>(key: &str, f: F) -> R {
read(key, |result| {
f(result.and_then(|value| str::from_utf8(value).map_err(|_| ())))
})
}
spiflash::write(ADDR + offset, key);
offset += key.len();
spiflash::write(ADDR + offset, &[0]);
offset += 1;
spiflash::write(ADDR + offset, value);
offset += value.len();
cache::flush_l2_cache();
Ok(offset)
}
fn compact() -> Result<(), ()> {
let lock = Lock::take()?;
let mut items = BTreeMap::new();
{
let mut iter = Iter::new(lock.data());
while let Some(result) = iter.next() {
let (key, value) = result?;
items.insert(key, value);
fn append_at(mut offset: usize, key: &[u8], value: &[u8]) -> Result<usize, ()> {
let record_size = 4 + key.len() + 1 + value.len();
if offset + record_size > SIZE {
return Err(())
}
let mut record_size_bytes = [0u8; 4];
BigEndian::write_u32(&mut record_size_bytes[..], record_size as u32);
spiflash::write(ADDR + offset, &record_size_bytes[..]);
offset += record_size_bytes.len();
spiflash::write(ADDR + offset, key);
offset += key.len();
spiflash::write(ADDR + offset, &[0]);
offset += 1;
spiflash::write(ADDR + offset, value);
offset += value.len();
cache::flush_l2_cache();
Ok(offset)
}
spiflash::erase_sector(ADDR);
cache::flush_l2_cache();
fn compact() -> Result<(), ()> {
let lock = Lock::take()?;
let mut offset = 0;
for (key, value) in items {
offset = append_at(offset, key, value)?;
}
Ok(())
}
fn append(key: &str, value: &[u8]) -> Result<(), ()> {
let lock = Lock::take()?;
let free_offset = {
let mut iter = Iter::new(lock.data());
while let Some(result) = iter.next() {
let _ = result?;
let mut items = BTreeMap::new();
{
let mut iter = Iter::new(lock.data());
while let Some(result) = iter.next() {
let (key, value) = result?;
items.insert(key, value);
}
}
iter.offset
};
append_at(free_offset, key.as_bytes(), value)?;
Ok(())
}
spiflash::erase_sector(ADDR);
cache::flush_l2_cache();
pub fn write(key: &str, value: &[u8]) -> Result<(), ()> {
match append(key, value) {
Ok(()) => (),
Err(()) => {
compact()?;
append(key, value)?;
let mut offset = 0;
for (key, value) in items {
offset = append_at(offset, key, value)?;
}
Ok(())
}
fn append(key: &str, value: &[u8]) -> Result<(), ()> {
let lock = Lock::take()?;
let free_offset = {
let mut iter = Iter::new(lock.data());
while let Some(result) = iter.next() {
let _ = result?;
}
iter.offset
};
append_at(free_offset, key.as_bytes(), value)?;
Ok(())
}
pub fn write(key: &str, value: &[u8]) -> Result<(), ()> {
match append(key, value) {
Ok(()) => (),
Err(()) => {
compact()?;
append(key, value)?;
}
}
Ok(())
}
pub fn remove(key: &str) -> Result<(), ()> {
write(key, &[])
}
pub fn erase() -> Result<(), ()> {
let _lock = Lock::take()?;
spiflash::erase_sector(ADDR);
cache::flush_l2_cache();
Ok(())
}
Ok(())
}
pub fn remove(key: &str) -> Result<(), ()> {
write(key, &[])
#[cfg(not(has_spiflash))]
mod imp {
pub fn read<F: FnOnce(Result<&[u8], ()>) -> R, R>(_key: &str, f: F) -> R {
f(Err(()))
}
pub fn read_str<F: FnOnce(Result<&str, ()>) -> R, R>(_key: &str, f: F) -> R {
f(Err(()))
}
pub fn write(_key: &str, _value: &[u8]) -> Result<(), ()> {
Err(())
}
pub fn remove(_key: &str) -> Result<(), ()> {
Err(())
}
pub fn erase() -> Result<(), ()> {
Err(())
}
}
pub fn erase() -> Result<(), ()> {
let _lock = Lock::take()?;
spiflash::erase_sector(ADDR);
cache::flush_l2_cache();
Ok(())
}
pub use self::imp::*;

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@ -1,19 +0,0 @@
pub fn read<F: FnOnce(Result<&[u8], ()>) -> R, R>(_key: &str, f: F) -> R {
f(Err(()))
}
pub fn read_str<F: FnOnce(Result<&str, ()>) -> R, R>(_key: &str, f: F) -> R {
f(Err(()))
}
pub fn write(_key: &str, _value: &[u8]) -> Result<(), ()> {
Err(())
}
pub fn remove(_key: &str) -> Result<(), ()> {
Err(())
}
pub fn erase() -> Result<(), ()> {
Err(())
}

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@ -35,10 +35,7 @@ macro_rules! borrow_mut {
})
}
#[cfg(has_spiflash)]
mod config;
#[cfg(not(has_spiflash))]
#[path="config_dummy.rs"] mod config;
mod ethmac;
mod rtio_mgt;