ppc/ppc405: QOM'ify CPU

Drop the use of ppc4xx_init() and duplicate a bit of code related to
clocks in the SoC realize routine. We will clean that up in the
following patches.

ppc_dcr_init() simply allocates default DCR handlers for the CPU. Maybe
this could be done in model initializer of the CPU families needing it.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <20220809153904.485018-8-clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

hw/ppc/ppc405.h

@@ -79,7 +79,7 @@ struct Ppc405SoCState {
     hwaddr ram_size;
 
     uint32_t sysclk;
-    PowerPCCPU *cpu;
+    PowerPCCPU cpu;
     DeviceState *uic;
 };
 

hw/ppc/ppc405_boards.c

@@ -313,7 +313,7 @@ static void ppc405_init(MachineState *machine)
 
     /* Load ELF kernel and rootfs.cpio */
     } else if (kernel_filename && !machine->firmware) {
-        boot_from_kernel(machine, ppc405->soc.cpu);
+        boot_from_kernel(machine, &ppc405->soc.cpu);
     }
 }
 

hw/ppc/ppc405_uc.c

@@ -1432,22 +1432,41 @@ static void ppc405ep_cpc_init (CPUPPCState *env, clk_setup_t clk_setup[8],
 #endif
 }
 
+static void ppc405_soc_instance_init(Object *obj)
+{
+    Ppc405SoCState *s = PPC405_SOC(obj);
+
+    object_initialize_child(obj, "cpu", &s->cpu,
+                            POWERPC_CPU_TYPE_NAME("405ep"));
+}
+
+static void ppc405_reset(void *opaque)
+{
+    cpu_reset(CPU(opaque));
+}
+
 static void ppc405_soc_realize(DeviceState *dev, Error **errp)
 {
     Ppc405SoCState *s = PPC405_SOC(dev);
-    clk_setup_t clk_setup[PPC405EP_CLK_NB], tlb_clk_setup;
+    clk_setup_t clk_setup[PPC405EP_CLK_NB];
     qemu_irq dma_irqs[4], gpt_irqs[5], mal_irqs[4];
     CPUPPCState *env;
 
     memset(clk_setup, 0, sizeof(clk_setup));
 
     /* init CPUs */
-    s->cpu = ppc4xx_init(POWERPC_CPU_TYPE_NAME("405ep"),
-                      &clk_setup[PPC405EP_CPU_CLK],
-                      &tlb_clk_setup, s->sysclk);
-    env = &s->cpu->env;
-    clk_setup[PPC405EP_CPU_CLK].cb = tlb_clk_setup.cb;
-    clk_setup[PPC405EP_CPU_CLK].opaque = tlb_clk_setup.opaque;
+    if (!qdev_realize(DEVICE(&s->cpu), NULL, errp)) {
+        return;
+    }
+    qemu_register_reset(ppc405_reset, &s->cpu);
+
+    env = &s->cpu.env;
+
+    clk_setup[PPC405EP_CPU_CLK].cb =
+        ppc_40x_timers_init(env, s->sysclk, PPC_INTERRUPT_PIT);
+    clk_setup[PPC405EP_CPU_CLK].opaque = env;
+
+    ppc_dcr_init(env, NULL, NULL);
 
     /* CPU control */
     ppc405ep_cpc_init(env, clk_setup, s->sysclk);
@@ -1464,16 +1483,16 @@ static void ppc405_soc_realize(DeviceState *dev, Error **errp)
     /* Universal interrupt controller */
     s->uic = qdev_new(TYPE_PPC_UIC);
 
-    object_property_set_link(OBJECT(s->uic), "cpu", OBJECT(s->cpu),
+    object_property_set_link(OBJECT(s->uic), "cpu", OBJECT(&s->cpu),
                              &error_fatal);
     if (!sysbus_realize(SYS_BUS_DEVICE(s->uic), errp)) {
         return;
     }
 
     sysbus_connect_irq(SYS_BUS_DEVICE(s->uic), PPCUIC_OUTPUT_INT,
-                       qdev_get_gpio_in(DEVICE(s->cpu), PPC40x_INPUT_INT));
+                       qdev_get_gpio_in(DEVICE(&s->cpu), PPC40x_INPUT_INT));
     sysbus_connect_irq(SYS_BUS_DEVICE(s->uic), PPCUIC_OUTPUT_CINT,
-                       qdev_get_gpio_in(DEVICE(s->cpu), PPC40x_INPUT_CINT));
+                       qdev_get_gpio_in(DEVICE(&s->cpu), PPC40x_INPUT_CINT));
 
     /* SDRAM controller */
         /* XXX 405EP has no ECC interrupt */
@@ -1563,6 +1582,7 @@ static const TypeInfo ppc405_types[] = {
         .name           = TYPE_PPC405_SOC,
         .parent         = TYPE_DEVICE,
         .instance_size  = sizeof(Ppc405SoCState),
+        .instance_init  = ppc405_soc_instance_init,
         .class_init     = ppc405_soc_class_init,
     }
 };

hw/ppc/ppc4xx_devs.c

@@ -37,38 +37,6 @@
 #include "qapi/error.h"
 #include "trace.h"
 
-static void ppc4xx_reset(void *opaque)
-{
-    PowerPCCPU *cpu = opaque;
-
-    cpu_reset(CPU(cpu));
-}
-
-/*****************************************************************************/
-/* Generic PowerPC 4xx processor instantiation */
-PowerPCCPU *ppc4xx_init(const char *cpu_type,
-                        clk_setup_t *cpu_clk, clk_setup_t *tb_clk,
-                        uint32_t sysclk)
-{
-    PowerPCCPU *cpu;
-    CPUPPCState *env;
-
-    /* init CPUs */
-    cpu = POWERPC_CPU(cpu_create(cpu_type));
-    env = &cpu->env;
-
-    cpu_clk->cb = NULL; /* We don't care about CPU clock frequency changes */
-    cpu_clk->opaque = env;
-    /* Set time-base frequency to sysclk */
-    tb_clk->cb = ppc_40x_timers_init(env, sysclk, PPC_INTERRUPT_PIT);
-    tb_clk->opaque = env;
-    ppc_dcr_init(env, NULL, NULL);
-    /* Register qemu callbacks */
-    qemu_register_reset(ppc4xx_reset, cpu);
-
-    return cpu;
-}
-
 /*****************************************************************************/
 /* SDRAM controller */
 typedef struct ppc4xx_sdram_t ppc4xx_sdram_t;

include/hw/ppc/ppc4xx.h

@@ -28,11 +28,6 @@
 #include "hw/ppc/ppc.h"
 #include "exec/memory.h"
 
-/* PowerPC 4xx core initialization */
-PowerPCCPU *ppc4xx_init(const char *cpu_model,
-                        clk_setup_t *cpu_clk, clk_setup_t *tb_clk,
-                        uint32_t sysclk);
-
 void ppc4xx_sdram_banks(MemoryRegion *ram, int nr_banks,
                         MemoryRegion ram_memories[],
                         hwaddr ram_bases[], hwaddr ram_sizes[],