arch/x86_64: add addrenv support

this commit adds simple addrenv support for x86_64

Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>

arch/x86_64/src/common/x86_64_initialize.c

@@ -26,8 +26,27 @@
 #include <nuttx/board.h>
 #include <arch/board/board.h>
 
+#ifdef CONFIG_DEV_SIMPLE_ADDRENV
+#  include <nuttx/drivers/addrenv.h>
+#endif
+
 #include "x86_64_internal.h"
 
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#ifdef CONFIG_DEV_SIMPLE_ADDRENV
+/* Map 1:1 with 0x100000000 offset */
+
+struct simple_addrenv_s g_addrenv =
+{
+  .va   = X86_64_LOAD_OFFSET,
+  .pa   = 0,
+  .size = 0xffffffffffffffff
+};
+#endif
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -59,6 +78,21 @@ static void up_calibratedelay(void)
 #  define up_calibratedelay()
 #endif
 
+/****************************************************************************
+ * Name: up_addrenv_init
+ *
+ * Description:
+ *   Initialize addrenv.
+ *
+ ****************************************************************************/
+
+static void x86_64_addrenv_init(void)
+{
+#ifdef CONFIG_DEV_SIMPLE_ADDRENV
+  simple_addrenv_initialize(&g_addrenv);
+#endif
+}
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -86,6 +120,10 @@ void up_initialize(void)
 
   x86_64_addregion();
 
+  /* Initialzie addrenv */
+
+  x86_64_addrenv_init();
+
 #ifdef CONFIG_PM
   /* Initialize the power management subsystem.  This MCU-specific function
    * must be called *very* early in the initialization sequence *before* any