Integrate flaterm terminal

kernel/hal/util.c

@@ -1,9 +1,16 @@
 #include <stdint.h>
+#include <stddef.h>
 #include "hal.h"
 
-void hal_memset(void *mem, uint8_t v, uint32_t size) {
-  uint8_t *mem1 = mem;
-  for (uint32_t i = 0; i < size; i++) {
-    mem1[i] = v;
-  }
+void *hal_memset(void *p, int c, size_t n) {
+  char *cp = p;
+  for (size_t i = 0; i < n; i++) cp[i] = c;
+  return p;
+}
+
+void *hal_memcpy(void *dst, const void *src, size_t n) {
+  char *a = dst;
+  const char *b = src;
+  for (size_t i = 0; i < n; i++) a[i] = b[i];
+  return dst;
 }