sparc64: do not use ram_size global

Use the machine properties instead.

Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/sparc64/sparc64.c

@@ -25,6 +25,7 @@
 
 #include "qemu/osdep.h"
 #include "cpu.h"
+#include "hw/boards.h"
 #include "hw/char/serial.h"
 #include "hw/sparc/sparc64.h"
 #include "qemu/timer.h"
@@ -180,7 +181,7 @@ static void main_cpu_reset(void *opaque)
     cpu_timer_reset(env->hstick);
 
     env->gregs[1] = 0; /* Memory start */
-    env->gregs[2] = ram_size; /* Memory size */
+    env->gregs[2] = current_machine->ram_size; /* Memory size */
     env->gregs[3] = 0; /* Machine description XXX */
     if (nr_resets++ == 0) {
         /* Power on reset */

hw/sparc64/sun4u.c

@@ -690,7 +690,7 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
     initrd_addr = 0;
     kernel_size = sun4u_load_kernel(machine->kernel_filename,
                                     machine->initrd_filename,
-                                    ram_size, &initrd_size, &initrd_addr,
+                                    machine->ram_size, &initrd_size, &initrd_addr,
                                     &kernel_addr, &kernel_entry);
 
     sun4u_NVRAM_set_params(nvram, NVRAM_SIZE, "Sun4u", machine->ram_size,
@@ -713,7 +713,7 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
     fw_cfg = FW_CFG(dev);
     fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)machine->smp.cpus);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)machine->smp.max_cpus);
-    fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
+    fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)machine->ram_size);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, hwdef->machine_id);
     fw_cfg_add_i64(fw_cfg, FW_CFG_KERNEL_ADDR, kernel_entry);
     fw_cfg_add_i64(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);