If user provided non-sense RAM size, board will ignore it
and continue running with fixed RAM size.

Also RAM is going to be allocated by generic code, so it
won't be possible for board to fix CLI.

Make it error message and exit to force user fix CLI,
instead of accepting non-sense CLI values.

PS:
move fixed RAM size into mc->default_ram_size, so that
generic code will know how much to allocate.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/ppc/ppc405_boards.c | 36 +++++++++++++++++++++++-------------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/hw/ppc/ppc405_boards.c b/hw/ppc/ppc405_boards.c
index 1f721fe..41aebbc 100644
--- a/hw/ppc/ppc405_boards.c
+++ b/hw/ppc/ppc405_boards.c
@@ -137,7 +137,7 @@ static void ref405ep_fpga_init(MemoryRegion *sysmem, uint32_t base)
 
 static void ref405ep_init(MachineState *machine)
 {
-    ram_addr_t ram_size = machine->ram_size;
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
     const char *kernel_filename = machine->kernel_filename;
     const char *kernel_cmdline = machine->kernel_cmdline;
     const char *initrd_filename = machine->initrd_filename;
@@ -161,15 +161,20 @@ static void ref405ep_init(MachineState *machine)
     DriveInfo *dinfo;
     MemoryRegion *sysmem = get_system_memory();
 
+    if (machine->ram_size != mc->default_ram_size) {
+        error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
+                     mc->default_ram_size);
+        exit(EXIT_FAILURE);
+    }
+
     /* XXX: fix this */
     memory_region_allocate_system_memory(&ram_memories[0], NULL, "ef405ep.ram",
-                                         0x08000000);
+                                         machine->ram_size);
     ram_bases[0] = 0;
-    ram_sizes[0] = 0x08000000;
+    ram_sizes[0] = machine->ram_size;
     memory_region_init(&ram_memories[1], NULL, "ef405ep.ram1", 0);
     ram_bases[1] = 0x00000000;
     ram_sizes[1] = 0x00000000;
-    ram_size = 128 * MiB;
     env = ppc405ep_init(sysmem, ram_memories, ram_bases, ram_sizes,
                         33333333, &pic, kernel_filename == NULL ? 0 : 1);
     /* allocate SRAM */
@@ -227,7 +232,7 @@ static void ref405ep_init(MachineState *machine)
     if (linux_boot) {
         memset(&bd, 0, sizeof(bd));
         bd.bi_memstart = 0x00000000;
-        bd.bi_memsize = ram_size;
+        bd.bi_memsize = machine->ram_size;
         bd.bi_flashstart = -bios_size;
         bd.bi_flashsize = -bios_size;
         bd.bi_flashoffset = 0;
@@ -255,7 +260,7 @@ static void ref405ep_init(MachineState *machine)
         kernel_base = KERNEL_LOAD_ADDR;
         /* now we can load the kernel */
         kernel_size = load_image_targphys(kernel_filename, kernel_base,
-                                          ram_size - kernel_base);
+                                          machine->ram_size - kernel_base);
         if (kernel_size < 0) {
             error_report("could not load kernel '%s'", kernel_filename);
             exit(1);
@@ -266,7 +271,7 @@ static void ref405ep_init(MachineState *machine)
         if (initrd_filename) {
             initrd_base = INITRD_LOAD_ADDR;
             initrd_size = load_image_targphys(initrd_filename, initrd_base,
-                                              ram_size - initrd_base);
+                                              machine->ram_size - initrd_base);
             if (initrd_size < 0) {
                 error_report("could not load initial ram disk '%s'",
                              initrd_filename);
@@ -304,6 +309,7 @@ static void ref405ep_class_init(ObjectClass *oc, void *data)
 
     mc->desc = "ref405ep";
     mc->init = ref405ep_init;
+    mc->default_ram_size = 0x08000000;
 }
 
 static const TypeInfo ref405ep_type = {
@@ -408,7 +414,7 @@ static void taihu_cpld_init(MemoryRegion *sysmem, uint32_t base)
 
 static void taihu_405ep_init(MachineState *machine)
 {
-    ram_addr_t ram_size = machine->ram_size;
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
     const char *kernel_filename = machine->kernel_filename;
     const char *initrd_filename = machine->initrd_filename;
     char *filename;
@@ -425,10 +431,13 @@ static void taihu_405ep_init(MachineState *machine)
     int fl_idx;
     DriveInfo *dinfo;
 
-    /* RAM is soldered to the board so the size cannot be changed */
-    ram_size = 0x08000000;
+    if (machine->ram_size != mc->default_ram_size) {
+        error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
+                     mc->default_ram_size);
+        exit(EXIT_FAILURE);
+    }
     memory_region_allocate_system_memory(ram, NULL, "taihu_405ep.ram",
-                                         ram_size);
+                                         machine->ram_size);
 
     ram_bases[0] = 0;
     ram_sizes[0] = 0x04000000;
@@ -500,7 +509,7 @@ static void taihu_405ep_init(MachineState *machine)
         kernel_base = KERNEL_LOAD_ADDR;
         /* now we can load the kernel */
         kernel_size = load_image_targphys(kernel_filename, kernel_base,
-                                          ram_size - kernel_base);
+                                          machine->ram_size - kernel_base);
         if (kernel_size < 0) {
             error_report("could not load kernel '%s'", kernel_filename);
             exit(1);
@@ -509,7 +518,7 @@ static void taihu_405ep_init(MachineState *machine)
         if (initrd_filename) {
             initrd_base = INITRD_LOAD_ADDR;
             initrd_size = load_image_targphys(initrd_filename, initrd_base,
-                                              ram_size - initrd_base);
+                                              machine->ram_size - initrd_base);
             if (initrd_size < 0) {
                 error_report("could not load initial ram disk '%s'",
                              initrd_filename);
@@ -533,6 +542,7 @@ static void taihu_class_init(ObjectClass *oc, void *data)
 
     mc->desc = "taihu";
     mc->init = taihu_405ep_init;
+    mc->default_ram_size = 0x08000000;
 }
 
 static const TypeInfo taihu_type = {
-- 
2.7.4