lm32/lm32_boards: 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.

PS:
 while at it add check for user supplied RAM size and error
 out if it mismatches board expected value.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200219160953.13771-45-imammedo@redhat.com>

1 files changed, 26 insertions, 13 deletions

diff --git a/hw/lm32/lm32_boards.c b/hw/lm32/lm32_boards.c
index d1894adab8..4e0a98c117 100644
--- a/hw/lm32/lm32_boards.c
+++ b/hw/lm32/lm32_boards.c
@@ -19,6 +19,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/units.h"
+#include "qemu/cutils.h"
 #include "qemu/error-report.h"
 #include "cpu.h"
 #include "hw/sysbus.h"
@@ -75,22 +76,28 @@ static void main_cpu_reset(void *opaque)
 
 static void lm32_evr_init(MachineState *machine)
 {
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
     const char *kernel_filename = machine->kernel_filename;
     LM32CPU *cpu;
     CPULM32State *env;
     DriveInfo *dinfo;
     MemoryRegion *address_space_mem =  get_system_memory();
-    MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
     qemu_irq irq[32];
     ResetInfo *reset_info;
     int i;
 
+    if (machine->ram_size != mc->default_ram_size) {
+        char *sz = size_to_str(mc->default_ram_size);
+        error_report("Invalid RAM size, should be %s", sz);
+        g_free(sz);
+        exit(EXIT_FAILURE);
+    }
+
     /* memory map */
     hwaddr flash_base  = 0x04000000;
     size_t flash_sector_size       = 256 * KiB;
     size_t flash_size              = 32 * MiB;
     hwaddr ram_base    = 0x08000000;
-    size_t ram_size                = 64 * MiB;
     hwaddr timer0_base = 0x80002000;
     hwaddr uart0_base  = 0x80006000;
     hwaddr timer1_base = 0x8000a000;
@@ -107,9 +114,7 @@ static void lm32_evr_init(MachineState *machine)
 
     reset_info->flash_base = flash_base;
 
-    memory_region_allocate_system_memory(phys_ram, NULL, "lm32_evr.sdram",
-                                         ram_size);
-    memory_region_add_subregion(address_space_mem, ram_base, phys_ram);
+    memory_region_add_subregion(address_space_mem, ram_base, machine->ram);
 
     dinfo = drive_get(IF_PFLASH, 0, 0);
     /* Spansion S29NS128P */
@@ -144,7 +149,7 @@ static void lm32_evr_init(MachineState *machine)
 
         if (kernel_size < 0) {
             kernel_size = load_image_targphys(kernel_filename, ram_base,
-                                              ram_size);
+                                              machine->ram_size);
             reset_info->bootstrap_pc = ram_base;
         }
 
@@ -159,6 +164,7 @@ static void lm32_evr_init(MachineState *machine)
 
 static void lm32_uclinux_init(MachineState *machine)
 {
+    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;
@@ -166,18 +172,23 @@ static void lm32_uclinux_init(MachineState *machine)
     CPULM32State *env;
     DriveInfo *dinfo;
     MemoryRegion *address_space_mem =  get_system_memory();
-    MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
     qemu_irq irq[32];
     HWSetup *hw;
     ResetInfo *reset_info;
     int i;
 
+    if (machine->ram_size != mc->default_ram_size) {
+        char *sz = size_to_str(mc->default_ram_size);
+        error_report("Invalid RAM size, should be %s", sz);
+        g_free(sz);
+        exit(EXIT_FAILURE);
+    }
+
     /* memory map */
     hwaddr flash_base   = 0x04000000;
     size_t flash_sector_size        = 256 * KiB;
     size_t flash_size               = 32 * MiB;
     hwaddr ram_base     = 0x08000000;
-    size_t ram_size                 = 64 * MiB;
     hwaddr uart0_base   = 0x80000000;
     hwaddr timer0_base  = 0x80002000;
     hwaddr timer1_base  = 0x80010000;
@@ -200,9 +211,7 @@ static void lm32_uclinux_init(MachineState *machine)
 
     reset_info->flash_base = flash_base;
 
-    memory_region_allocate_system_memory(phys_ram, NULL,
-                                         "lm32_uclinux.sdram", ram_size);
-    memory_region_add_subregion(address_space_mem, ram_base, phys_ram);
+    memory_region_add_subregion(address_space_mem, ram_base, machine->ram);
 
     dinfo = drive_get(IF_PFLASH, 0, 0);
     /* Spansion S29NS128P */
@@ -238,7 +247,7 @@ static void lm32_uclinux_init(MachineState *machine)
 
         if (kernel_size < 0) {
             kernel_size = load_image_targphys(kernel_filename, ram_base,
-                                              ram_size);
+                                              machine->ram_size);
             reset_info->bootstrap_pc = ram_base;
         }
 
@@ -252,7 +261,7 @@ static void lm32_uclinux_init(MachineState *machine)
     hw = hwsetup_init();
     hwsetup_add_cpu(hw, "LM32", 75000000);
     hwsetup_add_flash(hw, "flash", flash_base, flash_size);
-    hwsetup_add_ddr_sdram(hw, "ddr_sdram", ram_base, ram_size);
+    hwsetup_add_ddr_sdram(hw, "ddr_sdram", ram_base, machine->ram_size);
     hwsetup_add_timer(hw, "timer0", timer0_base, timer0_irq);
     hwsetup_add_timer(hw, "timer1_dev_only", timer1_base, timer1_irq);
     hwsetup_add_timer(hw, "timer2_dev_only", timer2_base, timer2_irq);
@@ -288,6 +297,8 @@ static void lm32_evr_class_init(ObjectClass *oc, void *data)
     mc->init = lm32_evr_init;
     mc->is_default = 1;
     mc->default_cpu_type = LM32_CPU_TYPE_NAME("lm32-full");
+    mc->default_ram_size = 64 * MiB;
+    mc->default_ram_id = "lm32_evr.sdram";
 }
 
 static const TypeInfo lm32_evr_type = {
@@ -304,6 +315,8 @@ static void lm32_uclinux_class_init(ObjectClass *oc, void *data)
     mc->init = lm32_uclinux_init;
     mc->is_default = 0;
     mc->default_cpu_type = LM32_CPU_TYPE_NAME("lm32-full");
+    mc->default_ram_size = 64 * MiB;
+    mc->default_ram_id = "lm32_uclinux.sdram";
 }
 
 static const TypeInfo lm32_uclinux_type = {