Kernel: Add a class to wrap aarch64 MIDR_EL1

We'll need part_num() to determine the MMIO address base. It's 0x3F000000 on rpi3 but 0xFE000000 on rpi4.
Author: https://github.com/nico Commit: 3c6ad4c7db Pull-request: https://github.com/SerenityOS/serenity/pull/9992 Reviewed-by: https://github.com/linusg
2025-07-29 20:29:18 +00:00 · 2021-09-12 09:42:27 -04:00 · 2021-09-12 09:42:27 -04:00 · 3c6ad4c7db · 2024-07-18 04:06:22 +09:00
commit 3c6ad4c7db
parent 2dc02607ed
4 changed files with 59 additions and 0 deletions
--- a/Kernel/Prekernel/Arch/aarch64/init.cpp
+++ b/Kernel/Prekernel/Arch/aarch64/init.cpp
@ -5,10 +5,13 @@
 */

 #include <AK/Types.h>
+#include <Kernel/Prekernel/Arch/aarch64/MainIdRegister.h>

 extern "C" [[noreturn]] void init();
 extern "C" [[noreturn]] void init()
 {
+    Prekernel::MainIdRegister id;
+    [[maybe_unused]] unsigned part_num = id.part_num();
    for (;;) { }
 }