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.

PS:
 remove no longer needed RasPiState

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
CC: Andrew.Baumann@microsoft.com
CC: philmd@redhat.com
CC: peter.maydell@linaro.org
CC: qemu-arm@nongnu.org
---
 hw/arm/raspi.c | 34 +++++++++++++---------------------
 1 file changed, 13 insertions(+), 21 deletions(-)

diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
index 6a510aa..33ace66 100644
--- a/hw/arm/raspi.c
+++ b/hw/arm/raspi.c
@@ -32,11 +32,6 @@
 /* Table of Linux board IDs for different Pi versions */
 static const int raspi_boardid[] = {[1] = 0xc42, [2] = 0xc43, [3] = 0xc44};
 
-typedef struct RasPiState {
-    BCM283XState soc;
-    MemoryRegion ram;
-} RasPiState;
-
 static void write_smpboot(ARMCPU *cpu, const struct arm_boot_info *info)
 {
     static const uint32_t smpboot[] = {
@@ -166,7 +161,7 @@ static void setup_boot(MachineState *machine, int version, size_t ram_size)
 
 static void raspi_init(MachineState *machine, int version)
 {
-    RasPiState *s = g_new0(RasPiState, 1);
+    Object *soc;
     uint32_t vcram_size;
     DriveInfo *di;
     BlockBackend *blk;
@@ -179,30 +174,26 @@ static void raspi_init(MachineState *machine, int version)
         exit(1);
     }
 
-    object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
-                            version == 3 ? TYPE_BCM2837 : TYPE_BCM2836,
-                            &error_abort, NULL);
+    soc = object_new(version == 3 ? TYPE_BCM2837 : TYPE_BCM2836);
+    object_property_add_child(OBJECT(machine), "soc", soc, &error_fatal);
 
-    /* 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_property_add_const_link(OBJECT(&s->soc), "ram", OBJECT(&s->ram),
+    object_property_add_const_link(soc, "ram", OBJECT(machine->ram),
                                    &error_abort);
-    object_property_set_int(OBJECT(&s->soc), machine->smp.cpus, "enabled-cpus",
+    object_property_set_int(soc, machine->smp.cpus, "enabled-cpus",
                             &error_abort);
     int board_rev = version == 3 ? 0xa02082 : 0xa21041;
-    object_property_set_int(OBJECT(&s->soc), board_rev, "board-rev",
-                            &error_abort);
-    object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_abort);
+    object_property_set_int(soc, board_rev, "board-rev", &error_abort);
+    object_property_set_bool(soc, true, "realized", &error_abort);
 
     /* Create and plug in the SD cards */
     di = drive_get_next(IF_SD);
     blk = di ? blk_by_legacy_dinfo(di) : NULL;
-    bus = qdev_get_child_bus(DEVICE(&s->soc), "sd-bus");
+    bus = qdev_get_child_bus(DEVICE(soc), "sd-bus");
     if (bus == NULL) {
         error_report("No SD bus found in SOC object");
         exit(1);
@@ -211,8 +202,7 @@ static void raspi_init(MachineState *machine, int version)
     qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
     object_property_set_bool(OBJECT(carddev), true, "realized", &error_fatal);
 
-    vcram_size = object_property_get_uint(OBJECT(&s->soc), "vcram-size",
-                                          &error_abort);
+    vcram_size = object_property_get_uint(soc, "vcram-size", &error_abort);
     setup_boot(machine, version, machine->ram_size - vcram_size);
 }
 
@@ -233,6 +223,7 @@ static void raspi2_machine_init(MachineClass *mc)
     mc->min_cpus = BCM283X_NCPUS;
     mc->default_cpus = BCM283X_NCPUS;
     mc->default_ram_size = 1 * GiB;
+    mc->default_ram_id = "ram";
     mc->ignore_memory_transaction_failures = true;
 };
 DEFINE_MACHINE("raspi2", raspi2_machine_init)
@@ -255,6 +246,7 @@ static void raspi3_machine_init(MachineClass *mc)
     mc->min_cpus = BCM283X_NCPUS;
     mc->default_cpus = BCM283X_NCPUS;
     mc->default_ram_size = 1 * GiB;
+    mc->default_ram_id = "ram";
 }
 DEFINE_MACHINE("raspi3", raspi3_machine_init)
 #endif
-- 
2.7.4