[PULL 46/60] ppc/ppc405: QOM'ify PLB

[Daniel Henrique Barboza <danielhb413@gmail.com>]

From: Cédric Le Goater <clg@kaod.org>

PLB is currently modeled as a simple DCR device. Also drop the
ppc4xx_plb_init() helper and adapt the sam460ex machine.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
[balaton: ppc4xx_dcr_register changes]
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <c4256d1bffca86fe1d696aa9c56732e5f563e114.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
 hw/ppc/ppc405.h    | 14 ++++++++--
 hw/ppc/ppc405_uc.c | 64 ++++++++++++++++++++++++++--------------------
 hw/ppc/sam460ex.c  |  4 ++-
 3 files changed, 51 insertions(+), 31 deletions(-)

diff --git a/hw/ppc/ppc405.h b/hw/ppc/ppc405.h
index 4140e811d5..cb34792daf 100644
--- a/hw/ppc/ppc405.h
+++ b/hw/ppc/ppc405.h
@@ -63,6 +63,17 @@ struct ppc4xx_bd_info_t {
     uint32_t bi_iic_fast[2];
 };
 
+/* Peripheral local bus arbitrer */
+#define TYPE_PPC405_PLB "ppc405-plb"
+OBJECT_DECLARE_SIMPLE_TYPE(Ppc405PlbState, PPC405_PLB);
+struct Ppc405PlbState {
+    Ppc4xxDcrDeviceState parent_obj;
+
+    uint32_t acr;
+    uint32_t bear;
+    uint32_t besr;
+};
+
 /* PLB to OPB bridge */
 #define TYPE_PPC405_POB "ppc405-pob"
 OBJECT_DECLARE_SIMPLE_TYPE(Ppc405PobState, PPC405_POB);
@@ -232,11 +243,10 @@ struct Ppc405SoCState {
     Ppc405EbcState ebc;
     Ppc405OpbaState opba;
     Ppc405PobState pob;
+    Ppc405PlbState plb;
 };
 
 /* PowerPC 405 core */
 ram_addr_t ppc405_set_bootinfo(CPUPPCState *env, ram_addr_t ram_size);
 
-void ppc4xx_plb_init(CPUPPCState *env);
-
 #endif /* PPC405_H */
diff --git a/hw/ppc/ppc405_uc.c b/hw/ppc/ppc405_uc.c
index e5604c3421..9ed3ce4ebe 100644
--- a/hw/ppc/ppc405_uc.c
+++ b/hw/ppc/ppc405_uc.c
@@ -148,19 +148,11 @@ enum {
     PLB4A1_ACR = 0x089,
 };
 
-typedef struct ppc4xx_plb_t ppc4xx_plb_t;
-struct ppc4xx_plb_t {
-    uint32_t acr;
-    uint32_t bear;
-    uint32_t besr;
-};
-
-static uint32_t dcr_read_plb (void *opaque, int dcrn)
+static uint32_t dcr_read_plb(void *opaque, int dcrn)
 {
-    ppc4xx_plb_t *plb;
+    Ppc405PlbState *plb = opaque;
     uint32_t ret;
 
-    plb = opaque;
     switch (dcrn) {
     case PLB0_ACR:
         ret = plb->acr;
@@ -180,11 +172,10 @@ static uint32_t dcr_read_plb (void *opaque, int dcrn)
     return ret;
 }
 
-static void dcr_write_plb (void *opaque, int dcrn, uint32_t val)
+static void dcr_write_plb(void *opaque, int dcrn, uint32_t val)
 {
-    ppc4xx_plb_t *plb;
+    Ppc405PlbState *plb = opaque;
 
-    plb = opaque;
     switch (dcrn) {
     case PLB0_ACR:
         /* We don't care about the actual parameters written as
@@ -202,28 +193,36 @@ static void dcr_write_plb (void *opaque, int dcrn, uint32_t val)
     }
 }
 
-static void ppc4xx_plb_reset (void *opaque)
+static void ppc405_plb_reset(DeviceState *dev)
 {
-    ppc4xx_plb_t *plb;
+    Ppc405PlbState *plb = PPC405_PLB(dev);
 
-    plb = opaque;
     plb->acr = 0x00000000;
     plb->bear = 0x00000000;
     plb->besr = 0x00000000;
 }
 
-void ppc4xx_plb_init(CPUPPCState *env)
+static void ppc405_plb_realize(DeviceState *dev, Error **errp)
+{
+    Ppc405PlbState *plb = PPC405_PLB(dev);
+    Ppc4xxDcrDeviceState *dcr = PPC4xx_DCR_DEVICE(dev);
+
+    ppc4xx_dcr_register(dcr, PLB3A0_ACR, plb, &dcr_read_plb, &dcr_write_plb);
+    ppc4xx_dcr_register(dcr, PLB4A0_ACR, plb, &dcr_read_plb, &dcr_write_plb);
+    ppc4xx_dcr_register(dcr, PLB0_ACR, plb, &dcr_read_plb, &dcr_write_plb);
+    ppc4xx_dcr_register(dcr, PLB0_BEAR, plb, &dcr_read_plb, &dcr_write_plb);
+    ppc4xx_dcr_register(dcr, PLB0_BESR, plb, &dcr_read_plb, &dcr_write_plb);
+    ppc4xx_dcr_register(dcr, PLB4A1_ACR, plb, &dcr_read_plb, &dcr_write_plb);
+}
+
+static void ppc405_plb_class_init(ObjectClass *oc, void *data)
 {
-    ppc4xx_plb_t *plb;
-
-    plb = g_new0(ppc4xx_plb_t, 1);
-    ppc_dcr_register(env, PLB3A0_ACR, plb, &dcr_read_plb, &dcr_write_plb);
-    ppc_dcr_register(env, PLB4A0_ACR, plb, &dcr_read_plb, &dcr_write_plb);
-    ppc_dcr_register(env, PLB0_ACR, plb, &dcr_read_plb, &dcr_write_plb);
-    ppc_dcr_register(env, PLB0_BEAR, plb, &dcr_read_plb, &dcr_write_plb);
-    ppc_dcr_register(env, PLB0_BESR, plb, &dcr_read_plb, &dcr_write_plb);
-    ppc_dcr_register(env, PLB4A1_ACR, plb, &dcr_read_plb, &dcr_write_plb);
-    qemu_register_reset(ppc4xx_plb_reset, plb);
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->realize = ppc405_plb_realize;
+    dc->reset = ppc405_plb_reset;
+    /* Reason: only works as function of a ppc4xx SoC */
+    dc->user_creatable = false;
 }
 
 /*****************************************************************************/
@@ -1374,6 +1373,8 @@ static void ppc405_soc_instance_init(Object *obj)
     object_initialize_child(obj, "opba", &s->opba, TYPE_PPC405_OPBA);
 
     object_initialize_child(obj, "pob", &s->pob, TYPE_PPC405_POB);
+
+    object_initialize_child(obj, "plb", &s->plb, TYPE_PPC405_PLB);
 }
 
 static void ppc405_reset(void *opaque)
@@ -1405,7 +1406,9 @@ static void ppc405_soc_realize(DeviceState *dev, Error **errp)
     }
 
     /* PLB arbitrer */
-    ppc4xx_plb_init(env);
+    if (!ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(&s->plb), &s->cpu, errp)) {
+        return;
+    }
 
     /* PLB to OPB bridge */
     if (!ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(&s->pob), &s->cpu, errp)) {
@@ -1530,6 +1533,11 @@ static void ppc405_soc_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo ppc405_types[] = {
     {
+        .name           = TYPE_PPC405_PLB,
+        .parent         = TYPE_PPC4xx_DCR_DEVICE,
+        .instance_size  = sizeof(Ppc405PlbState),
+        .class_init     = ppc405_plb_class_init,
+    }, {
         .name           = TYPE_PPC405_POB,
         .parent         = TYPE_PPC4xx_DCR_DEVICE,
         .instance_size  = sizeof(Ppc405PobState),
diff --git a/hw/ppc/sam460ex.c b/hw/ppc/sam460ex.c
index 320c61a7f3..31139c1554 100644
--- a/hw/ppc/sam460ex.c
+++ b/hw/ppc/sam460ex.c
@@ -309,7 +309,9 @@ static void sam460ex_init(MachineState *machine)
     ppc_dcr_init(env, NULL, NULL);
 
     /* PLB arbitrer */
-    ppc4xx_plb_init(env);
+    dev = qdev_new(TYPE_PPC405_PLB);
+    ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal);
+    object_unref(OBJECT(dev));
 
     /* interrupt controllers */
     for (i = 0; i < ARRAY_SIZE(uic); i++) {
-- 
2.37.2