+#if defined(CONFIG_SYS_LOWBOOT)
+# if defined(CONFIG_SYS_RAMBOOT)
+# error CONFIG_SYS_LOWBOOT is incompatible with CONFIG_SYS_RAMBOOT
+# endif /* CONFIG_SYS_RAMBOOT */
+# if defined(CONFIG_MGT5100)
+# error CONFIG_SYS_LOWBOOT is incompatible with MGT5100
+# endif /* CONFIG_MGT5100 */
+ lis r4, CONFIG_SYS_DEFAULT_MBAR@h
+ lis r3, START_REG(CONFIG_SYS_BOOTCS_START)@h
+ ori r3, r3, START_REG(CONFIG_SYS_BOOTCS_START)@l
+ stw r3, 0x4(r4) /* CS0 start */
+ lis r3, STOP_REG(CONFIG_SYS_BOOTCS_START, CONFIG_SYS_BOOTCS_SIZE)@h
+ ori r3, r3, STOP_REG(CONFIG_SYS_BOOTCS_START, CONFIG_SYS_BOOTCS_SIZE)@l