refactor(adapter): split trap/page_table/smp/entry by concern; trim comments

crates/adapter-riscv/src/boot_fs.rs

@@ -67,7 +67,6 @@ pub fn read_file_from_disk(
 ) -> Option<usize> {
     let mut sector_buf = [0u8; SECTOR_SIZE];
 
-    // Read boot sector
     if !blk.read_sector(0, &mut sector_buf) {
         return None;
     }
@@ -75,7 +74,6 @@ pub fn read_file_from_disk(
 
     let fat_name = to_fat_name(filename);
 
-    // Search root directory
     let mut first_cluster: u16 = 0;
     let mut file_size: u32 = 0;
     let mut found = false;
@@ -132,7 +130,6 @@ pub fn read_file_from_disk(
             read += chunk;
         }
 
-        // Read next cluster from FAT
         let fat_offset = (cluster as u32) * 2;
         let fat_sector = fs.reserved_sectors as u32 + fat_offset / SECTOR_SIZE as u32;
         let fat_byte = (fat_offset % SECTOR_SIZE as u32) as usize;