minor streamlining

02_runtime_init/README.md

@@ -108,7 +108,7 @@ diff -uNr 01_wait_forever/src/runtime_init.rs 02_runtime_init/src/runtime_init.r
 +/// Equivalent to `crt0` or `c0` code in C/C++ world. Clears the `bss` section,
 +/// then calls the kernel entry.
 +///
-+/// Called from BSP code.
++/// Called from `BSP` code.
 +///
 +/// # Safety
 +///

02_runtime_init/src/runtime_init.rs

@@ -7,7 +7,7 @@
 /// Equivalent to `crt0` or `c0` code in C/C++ world. Clears the `bss` section,
 /// then calls the kernel entry.
 ///
-/// Called from BSP code.
+/// Called from `BSP` code.
 ///
 /// # Safety
 ///

03_hacky_hello_world/src/runtime_init.rs

@@ -7,7 +7,7 @@
 /// Equivalent to `crt0` or `c0` code in C/C++ world. Clears the `bss` section,
 /// then calls the kernel entry.
 ///
-/// Called from BSP code.
+/// Called from `BSP` code.
 ///
 /// # Safety
 ///

04_zero_overhead_abstraction/README.md

@@ -31,15 +31,7 @@ diff -uNr 03_hacky_hello_world/Cargo.toml 04_zero_overhead_abstraction/Cargo.tom
 diff -uNr 03_hacky_hello_world/src/bsp/rpi3/panic_wait.rs 04_zero_overhead_abstraction/src/bsp/rpi3/panic_wait.rs
 --- 03_hacky_hello_world/src/bsp/rpi3/panic_wait.rs
 +++ 04_zero_overhead_abstraction/src/bsp/rpi3/panic_wait.rs
-@@ -6,6 +6,7 @@
-
- use crate::println;
- use core::panic::PanicInfo;
-+use cortex_a::asm;
-
- #[panic_handler]
- fn panic(info: &PanicInfo) -> ! {
-@@ -15,9 +16,7 @@
+@@ -15,9 +15,5 @@
          println!("Kernel panic!");
      }
 
@@ -47,9 +39,8 @@ diff -uNr 03_hacky_hello_world/src/bsp/rpi3/panic_wait.rs 04_zero_overhead_abstr
 -        loop {
 -            asm!("wfe" :::: "volatile")
 -        }
-+    loop {
-+        asm::wfe();
-     }
+-    }
++    super::wait_forever()
  }
 
 diff -uNr 03_hacky_hello_world/src/bsp/rpi3/start.S 04_zero_overhead_abstraction/src/bsp/rpi3/start.S

04_zero_overhead_abstraction/src/bsp/rpi3/panic_wait.rs

@@ -15,5 +15,5 @@ fn panic(info: &PanicInfo) -> ! {
         println!("Kernel panic!");
     }
 
-    super::wait_forever();
+    super::wait_forever()
 }

04_zero_overhead_abstraction/src/runtime_init.rs

@@ -7,7 +7,7 @@
 /// Equivalent to `crt0` or `c0` code in C/C++ world. Clears the `bss` section,
 /// then calls the kernel entry.
 ///
-/// Called from BSP code.
+/// Called from `BSP` code.
 ///
 /// # Safety
 ///