pintobyte rngit
xous-core/tools/src/utils.rs main (17e4bce8) Text, 3.34 KB
use std::collections::BTreeMap;
use std::fs::File;
use std::io;
pub struct CsrMemoryRegion {
pub start: u32,
pub length: u32,
}
pub struct CsrConfig {
pub regions: BTreeMap<String, CsrMemoryRegion>,
}
const PAGE_SIZE: u32 = 4096;
#[derive(Debug)]
pub enum ConfigError {
/// Couldn't parse string as number
NumberParseError(String, std::num::ParseIntError),
/// Generic IO Error
IoError(io::Error),
}
impl std::convert::From<io::Error> for ConfigError {
fn from(e: io::Error) -> ConfigError { ConfigError::IoError(e) }
}
pub fn get_base(value: &str) -> (&str, u32) {
if value.starts_with("0x") {
(value.trim_start_matches("0x"), 16)
} else if value.starts_with("0X") {
(value.trim_start_matches("0X"), 16)
} else if value.starts_with("0b") {
(value.trim_start_matches("0b"), 2)
} else if value.starts_with("0B") {
(value.trim_start_matches("0B"), 2)
} else if value.starts_with('0') && value != "0" {
(value.trim_start_matches('0'), 8)
} else {
(value, 10)
}
}
pub fn parse_u32(value: &str) -> Result<u32, ConfigError> {
let (value, base) = get_base(value);
u32::from_str_radix(value, base).map_err(|e| ConfigError::NumberParseError(value.to_owned(), e))
}
pub fn parse_csr_csv(filename: &str) -> Result<CsrConfig, ConfigError> {
let mut map = BTreeMap::new();
let file = File::open(filename)?;
let mut csr_base = 0;
let mut csr_top = 0;
let mut rdr = csv::ReaderBuilder::new().flexible(true).from_reader(file);
for result in rdr.records() {
if let Ok(r) = result {
if r.is_empty() {
eprintln!("csv: ignoring blank line");
continue;
}
match &r[0] {
"csr_base" => {
if r.len() < 3 {
eprintln!("csv: found csr_base entry, but entry was short");
continue;
}
let base_addr = parse_u32(&r[2])?;
if base_addr > csr_top {
// println!("csv: increasing csr top: {:08x} -> {:08x}", csr_top, base_addr);
csr_top = base_addr;
}
}
"memory_region" => {
if r.len() < 4 {
eprintln!("csv: found memory_region entry, but entry was short");
continue;
}
let region_name = &r[1];
let base_addr = parse_u32(&r[2])?;
let length = parse_u32(&r[3])?;
if region_name == "csr" {
csr_base = base_addr;
} else {
map.insert(
region_name.to_string().to_lowercase(),
CsrMemoryRegion { start: base_addr, length },
);
}
}
_ => (),
};
}
}
if csr_base != 0 && csr_top != 0 {
csr_top += 1;
csr_top = (csr_top + PAGE_SIZE - 1) & !(PAGE_SIZE - 1);
map.insert("csr".to_string(), CsrMemoryRegion { start: csr_base, length: csr_top - csr_base });
}
Ok(CsrConfig { regions: map })
}
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