diff --git a/hw/sun4u.c b/hw/sun4u.c
index 28a537435b..88c633d491 100644
--- a/hw/sun4u.c
+++ b/hw/sun4u.c
@@ -736,7 +736,8 @@ static CPUState *cpu_devinit(const char *cpu_model, const struct hwdef *hwdef)
     return env;
 }
 
-static void sun4uv_init(ram_addr_t RAM_size,
+static void sun4uv_init(MemoryRegion *address_space_mem,
+                        ram_addr_t RAM_size,
                         const char *boot_devices,
                         const char *kernel_filename, const char *kernel_cmdline,
                         const char *initrd_filename, const char *cpu_model,
@@ -771,7 +772,7 @@ static void sun4uv_init(ram_addr_t RAM_size,
 
     i = 0;
     if (hwdef->console_serial_base) {
-        serial_mm_init(get_system_memory(), hwdef->console_serial_base, 0,
+        serial_mm_init(address_space_mem, hwdef->console_serial_base, 0,
                        NULL, 115200, serial_hds[i], DEVICE_BIG_ENDIAN);
         i++;
     }
@@ -876,7 +877,7 @@ static void sun4u_init(ram_addr_t RAM_size,
                        const char *kernel_filename, const char *kernel_cmdline,
                        const char *initrd_filename, const char *cpu_model)
 {
-    sun4uv_init(RAM_size, boot_devices, kernel_filename,
+    sun4uv_init(get_system_memory(), RAM_size, boot_devices, kernel_filename,
                 kernel_cmdline, initrd_filename, cpu_model, &hwdefs[0]);
 }
 
@@ -886,7 +887,7 @@ static void sun4v_init(ram_addr_t RAM_size,
                        const char *kernel_filename, const char *kernel_cmdline,
                        const char *initrd_filename, const char *cpu_model)
 {
-    sun4uv_init(RAM_size, boot_devices, kernel_filename,
+    sun4uv_init(get_system_memory(), RAM_size, boot_devices, kernel_filename,
                 kernel_cmdline, initrd_filename, cpu_model, &hwdefs[1]);
 }
 
@@ -896,7 +897,7 @@ static void niagara_init(ram_addr_t RAM_size,
                          const char *kernel_filename, const char *kernel_cmdline,
                          const char *initrd_filename, const char *cpu_model)
 {
-    sun4uv_init(RAM_size, boot_devices, kernel_filename,
+    sun4uv_init(get_system_memory(), RAM_size, boot_devices, kernel_filename,
                 kernel_cmdline, initrd_filename, cpu_model, &hwdefs[2]);
 }