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Now we can parse the partion entries. Yeeeeaaahh!

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This commit is contained in:
NagiNikaido 2019-05-30 14:57:20 +08:00
parent a3f8601d18
commit e20a2ca8e2
1 changed files with 32 additions and 3 deletions
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35
kernel/src/arch/aarch64/board/raspi3/emmc.rs
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@ -1236,7 +1236,7 @@ impl EmmcCtl {
pub fn read(&mut self, block_no_arg: u32, count: usize, buf: &mut[u32]) -> Result<(), ()> {
let mut block_no = block_no_arg;
if self.card_supports_sdhc {
if !self.card_supports_sdhc {
block_no *= 512;
}
//assert_eq!(count * self.block_size, buf.len());
@ -1286,7 +1286,7 @@ impl EmmcCtl {
pub fn write(&mut self, block_no_arg: u32, count: usize, buf: &[u32]) -> Result<(), ()> {
let mut block_no = block_no_arg;
if self.card_supports_sdhc {
if !self.card_supports_sdhc {
block_no *= 512;
}
//assert_eq!(count * self.block_size, buf.len());
@ -1346,7 +1346,6 @@ lazy_static! {
fn demo() {
// print out the first section of the sd_card.
let section: [u8; 512] = [0; 512];
let buf = unsafe { slice::from_raw_parts_mut(section.as_ptr() as *mut u32, 512 / 4) };
println!("Trying to fetch the first section of the SD card.");
@ -1354,13 +1353,43 @@ fn demo() {
error!("Failed in fetching.");
return;
}
println!("Content:");
for i in 0..32 {
for j in 0..16{
print!("{:02X} ", section[i*16+j]);
}
println!("");
}
println!("");
let mut start_pos = 446; // start position of the partion table
for entry in 0..4 {
print!("Partion entry #{}: ", entry);
let partion_type = section[start_pos + 0x4];
fn partion_type_map(partion_type : u8) -> &'static str {
match partion_type {
0x00 => "Empty",
0x0c => "FAT32",
0x83 => "Linux",
0x82 => "Swap",
_ => "Not supported"
}
}
print!("{:^14}", partion_type_map(partion_type));
if partion_type != 0x00 {
let start_section: u32 = (section[start_pos + 0x8] as u32)
| (section[start_pos + 0x9] as u32) << 8
| (section[start_pos + 0xa] as u32) << 16
| (section[start_pos + 0xb] as u32) << 24;
let total_section: u32= (section[start_pos + 0xc] as u32)
| (section[start_pos + 0xd] as u32) << 8
| (section[start_pos + 0xe] as u32) << 16
| (section[start_pos + 0xf] as u32) << 24;
print!(" start section no. = {}, a total of {} sections in use.", start_section, total_section);
}
println!("");
start_pos += 16;
}
}
pub fn init() {
println!("Initializing EmmcCtl...");