Changes in kernel/arch/arm64/src/asm.S [28a5ebd:ebb3538] in mainline

File:

• kernel/arch/arm64/src/asm.S (modified) (1 diff)

kernel/arch/arm64/src/asm.S

@@ -56 +56 @@
 FUNCTION_END(memcpy_to_uspace_failover_address)
 
-FUNCTION_BEGIN(early_putuchar)
+/** Flush instruction caches
+ *
+ * @param x0 Starting address of the flushing.
+ * @param x1 Number of bytes to flush.
+ *
+ */
+FUNCTION_BEGIN(smc_coherence)
+        /* Initialize loop */
+        mov x9, x0
+        mov x10, xzr
+
+        __dc_loop:
+                /* Data or Unified Cache Line Clean */
+                dc cvau, x9
+                add x9, x9, #4
+                add x10, x10, #4
+                cmp x10, x1
+                blo __dc_loop
+
+        dsb ish
+
+        /* Initialize loop */
+        mov x9, x0
+        mov x10, xzr
+
+        __ic_loop:
+                /* Instruction Cache Line Invalidate */
+                ic ivau, x9
+                add x9, x9, #4
+                add x10, x10, #4
+                cmp x10, x1
+                blo __ic_loop
+
+        dsb ish
+        isb
         ret
-FUNCTION_END(early_putuchar)
+FUNCTION_END(smc_coherence)
 
 /* Static checks for the istate_t save/load. */