RTEMS | aarch64: Add _AArch64_Get_current_processor_for_system_start() (!233)

[Sebastian Huber (@sebhub)]

Sebastian Huber commented: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/233#note_112364


Sorry, I don't understand your problem. The original patch is this:

```diff
@@ -219,9 +219,8 @@ _el2_start:
 _el1_start:
 
 #ifdef RTEMS_SMP
-  /* Read MPIDR and get current processor index */
-  mrs x7, mpidr_el1
-  and x7, x7, #0xff
+  ldr x3, =aarch64_cpu_boot_params
+  ldr x7, [x3, #BOOT_PARAM_CPUN_OFFSET]
 #endif
 
 #ifdef RTEMS_SMP
```
Now you have to move it to the _AArch64_Get_current_processor_for_system_start() function, that is all.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/233#note_112364
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