arm/raspi: use memdev for RAM

memory_region_allocate_system_memory() API is going away, so
replace it with memdev allocated MemoryRegion. The later is
initialized by generic code, so board only needs to opt in
to memdev scheme by providing
    MachineClass::default_ram_id
and using MachineState::ram instead of manually initializing
RAM memory region.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200219160953.13771-30-imammedo@redhat.com>

diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
index 90ad9b811585377d34854c1080636309f909f828..acd2bb794d135b0ab80d890d7735c09c35ab92e8 100644 (file)
--- a/hw/arm/raspi.c
+++ b/hw/arm/raspi.c
@@ -39,7 +39,6 @@ typedef struct RaspiMachineState {
     MachineState parent_obj;
     /*< public >*/
     BCM283XState soc;
-    MemoryRegion ram;
 } RaspiMachineState;
 
 typedef struct RaspiMachineClass {
@@ -277,16 +276,14 @@ static void raspi_machine_init(MachineState *machine)
         exit(1);
     }
 
-    /* Allocate and map RAM */
-    memory_region_allocate_system_memory(&s->ram, OBJECT(machine), "ram",
-                                         machine->ram_size);
     /* FIXME: Remove when we have custom CPU address space support */
-    memory_region_add_subregion_overlap(get_system_memory(), 0, &s->ram, 0);
+    memory_region_add_subregion_overlap(get_system_memory(), 0,
+                                        machine->ram, 0);
 
     /* Setup the SOC */
     object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
                             board_soc_type(board_rev), &error_abort, NULL);
-    object_property_add_const_link(OBJECT(&s->soc), "ram", OBJECT(&s->ram),
+    object_property_add_const_link(OBJECT(&s->soc), "ram", OBJECT(machine->ram),
                                    &error_abort);
     object_property_set_int(OBJECT(&s->soc), board_rev, "board-rev",
                             &error_abort);
@@ -324,6 +321,7 @@ static void raspi_machine_class_init(ObjectClass *oc, void *data)
     mc->no_cdrom = 1;
     mc->default_cpus = mc->min_cpus = mc->max_cpus = cores_count(board_rev);
     mc->default_ram_size = board_ram_size(board_rev);
+    mc->default_ram_id = "ram";
     if (board_version(board_rev) == 2) {
         mc->ignore_memory_transaction_failures = true;
     }