arch: support customized up_cpu_index() in AMP mode

Some app with same code runs on different cores in AMP mode,
need the physical core on which the function is called.

Signed-off-by: hujun5 <hujun5@xiaomi.com>
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>

arch/ceva/include/irq.h

@@ -113,23 +113,13 @@ EXTERN uint32_t *volatile g_current_regs[CONFIG_SMP_NCPUS];
  * Name: up_cpu_index
  *
  * Description:
- *   Return an index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
- *   corresponds to the currently executing CPU.
- *
- * Input Parameters:
- *   None
- *
- * Returned Value:
- *   An integer index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
- *   corresponds to the currently executing CPU.
+ *   Return the real core number regardless CONFIG_SMP setting
  *
  ****************************************************************************/
 
-#ifdef CONFIG_SMP
-int up_cpu_index(void);
-#else
-#  define up_cpu_index() (0)
-#endif
+#ifdef CONFIG_ARCH_HAVE_MULTICPU
+int up_cpu_index(void) noinstrument_function;
+#endif /* CONFIG_ARCH_HAVE_MULTICPU */
 
 /****************************************************************************
  * Inline functions
@@ -137,12 +127,20 @@ int up_cpu_index(void);
 
 static inline_function uint32_t *up_current_regs(void)
 {
+#ifdef CONFIG_SMP
   return (uint32_t *)g_current_regs[up_cpu_index()];
+#else
+  return (uint32_t *)g_current_regs[0];
+#endif
 }
 
 static inline_function void up_set_current_regs(uint32_t *regs)
 {
+#ifdef CONFIG_SMP
   g_current_regs[up_cpu_index()] = regs;
+#else
+  g_current_regs[0] = regs;
+#endif
 }
 
 /****************************************************************************