[PATCH 03/22] ppc/ppc405: QOM'ify GPT

From: BALATON Zoltan <balaton@eik.bme.hu>
To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org
Cc: clg@kaod.org, Daniel Henrique Barboza <danielhb413@gmail.com>,
	Peter Maydell <peter.maydell@linaro.org>
Subject: [PATCH 03/22] ppc/ppc405: QOM'ify GPT
Date: Sat, 13 Aug 2022 17:34:30 +0200 (CEST)	[thread overview]
Message-ID: <b14a192ae442daee26d680130e20682c222d1ab8.1660402839.git.balaton@eik.bme.hu> (raw)
In-Reply-To: <cover.1660402839.git.balaton@eik.bme.hu>

From: Cédric Le Goater <clg@kaod.org>

The GPT controller is currently modeled as a SysBus device with a
unique memory region, a couple of IRQs and a timer.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/ppc/ppc405.h     | 22 ++++++++++
 hw/ppc/ppc405_uc.c  | 99 ++++++++++++++++++++++++---------------------
 hw/ppc/trace-events |  1 -
 3 files changed, 75 insertions(+), 47 deletions(-)

diff --git a/hw/ppc/ppc405.h b/hw/ppc/ppc405.h
index 2ba829988d..bcf55e4f6b 100644
--- a/hw/ppc/ppc405.h
+++ b/hw/ppc/ppc405.h
@@ -63,6 +63,27 @@ struct ppc4xx_bd_info_t {
     uint32_t bi_iic_fast[2];
 };
 
+/* General purpose timers */
+#define TYPE_PPC405_GPT "ppc405-gpt"
+OBJECT_DECLARE_SIMPLE_TYPE(Ppc405GptState, PPC405_GPT);
+struct Ppc405GptState {
+    SysBusDevice parent_obj;
+
+    MemoryRegion iomem;
+
+    int64_t tb_offset;
+    uint32_t tb_freq;
+    QEMUTimer *timer;
+    qemu_irq irqs[5];
+    uint32_t oe;
+    uint32_t ol;
+    uint32_t im;
+    uint32_t is;
+    uint32_t ie;
+    uint32_t comp[5];
+    uint32_t mask[5];
+};
+
 #define TYPE_PPC405_CPC "ppc405-cpc"
 OBJECT_DECLARE_SIMPLE_TYPE(Ppc405CpcState, PPC405_CPC);
 
@@ -114,6 +135,7 @@ struct Ppc405SoCState {
     PowerPCCPU cpu;
     DeviceState *uic;
     Ppc405CpcState cpc;
+    Ppc405GptState gpt;
 };
 
 /* PowerPC 405 core */
diff --git a/hw/ppc/ppc405_uc.c b/hw/ppc/ppc405_uc.c
index ec83c292a5..bf95fabdc0 100644
--- a/hw/ppc/ppc405_uc.c
+++ b/hw/ppc/ppc405_uc.c
@@ -926,34 +926,18 @@ static void ppc405_ocm_init(CPUPPCState *env)
 
 /*****************************************************************************/
 /* General purpose timers */
-typedef struct ppc4xx_gpt_t ppc4xx_gpt_t;
-struct ppc4xx_gpt_t {
-    MemoryRegion iomem;
-    int64_t tb_offset;
-    uint32_t tb_freq;
-    QEMUTimer *timer;
-    qemu_irq irqs[5];
-    uint32_t oe;
-    uint32_t ol;
-    uint32_t im;
-    uint32_t is;
-    uint32_t ie;
-    uint32_t comp[5];
-    uint32_t mask[5];
-};
-
-static int ppc4xx_gpt_compare (ppc4xx_gpt_t *gpt, int n)
+static int ppc4xx_gpt_compare(Ppc405GptState *gpt, int n)
 {
     /* XXX: TODO */
     return 0;
 }
 
-static void ppc4xx_gpt_set_output (ppc4xx_gpt_t *gpt, int n, int level)
+static void ppc4xx_gpt_set_output(Ppc405GptState *gpt, int n, int level)
 {
     /* XXX: TODO */
 }
 
-static void ppc4xx_gpt_set_outputs (ppc4xx_gpt_t *gpt)
+static void ppc4xx_gpt_set_outputs(Ppc405GptState *gpt)
 {
     uint32_t mask;
     int i;
@@ -974,7 +958,7 @@ static void ppc4xx_gpt_set_outputs (ppc4xx_gpt_t *gpt)
     }
 }
 
-static void ppc4xx_gpt_set_irqs (ppc4xx_gpt_t *gpt)
+static void ppc4xx_gpt_set_irqs(Ppc405GptState *gpt)
 {
     uint32_t mask;
     int i;
@@ -989,14 +973,14 @@ static void ppc4xx_gpt_set_irqs (ppc4xx_gpt_t *gpt)
     }
 }
 
-static void ppc4xx_gpt_compute_timer (ppc4xx_gpt_t *gpt)
+static void ppc4xx_gpt_compute_timer(Ppc405GptState *gpt)
 {
     /* XXX: TODO */
 }
 
 static uint64_t ppc4xx_gpt_read(void *opaque, hwaddr addr, unsigned size)
 {
-    ppc4xx_gpt_t *gpt = opaque;
+    Ppc405GptState *gpt = opaque;
     uint32_t ret;
     int idx;
 
@@ -1050,7 +1034,7 @@ static uint64_t ppc4xx_gpt_read(void *opaque, hwaddr addr, unsigned size)
 static void ppc4xx_gpt_write(void *opaque, hwaddr addr, uint64_t value,
                              unsigned size)
 {
-    ppc4xx_gpt_t *gpt = opaque;
+    Ppc405GptState *gpt = opaque;
     int idx;
 
     trace_ppc4xx_gpt_write(addr, size, value);
@@ -1114,22 +1098,20 @@ static const MemoryRegionOps gpt_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
-static void ppc4xx_gpt_cb (void *opaque)
+static void ppc4xx_gpt_cb(void *opaque)
 {
-    ppc4xx_gpt_t *gpt;
+    Ppc405GptState *gpt = opaque;
 
-    gpt = opaque;
     ppc4xx_gpt_set_irqs(gpt);
     ppc4xx_gpt_set_outputs(gpt);
     ppc4xx_gpt_compute_timer(gpt);
 }
 
-static void ppc4xx_gpt_reset (void *opaque)
+static void ppc405_gpt_reset(DeviceState *dev)
 {
-    ppc4xx_gpt_t *gpt;
+    Ppc405GptState *gpt = PPC405_GPT(dev);
     int i;
 
-    gpt = opaque;
     timer_del(gpt->timer);
     gpt->oe = 0x00000000;
     gpt->ol = 0x00000000;
@@ -1142,21 +1124,34 @@ static void ppc4xx_gpt_reset (void *opaque)
     }
 }
 
-static void ppc4xx_gpt_init(hwaddr base, qemu_irq irqs[5])
+static void ppc405_gpt_realize(DeviceState *dev, Error **errp)
 {
-    ppc4xx_gpt_t *gpt;
+    Ppc405GptState *s = PPC405_GPT(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     int i;
 
-    trace_ppc4xx_gpt_init(base);
+    s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &ppc4xx_gpt_cb, s);
+    memory_region_init_io(&s->iomem, OBJECT(s), &gpt_ops, s, "gpt", 0xd4);
+    sysbus_init_mmio(sbd, &s->iomem);
 
-    gpt = g_new0(ppc4xx_gpt_t, 1);
-    for (i = 0; i < 5; i++) {
-        gpt->irqs[i] = irqs[i];
+    for (i = 0; i < ARRAY_SIZE(s->irqs); i++) {
+        sysbus_init_irq(sbd, &s->irqs[i]);
     }
-    gpt->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &ppc4xx_gpt_cb, gpt);
-    memory_region_init_io(&gpt->iomem, NULL, &gpt_ops, gpt, "gpt", 0x0d4);
-    memory_region_add_subregion(get_system_memory(), base, &gpt->iomem);
-    qemu_register_reset(ppc4xx_gpt_reset, gpt);
+}
+
+static void ppc405_gpt_finalize(Object *obj)
+{
+    timer_del(PPC405_GPT(obj)->timer);
+}
+
+static void ppc405_gpt_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->realize = ppc405_gpt_realize;
+    dc->reset = ppc405_gpt_reset;
+    /* Reason: only works as function of a ppc4xx SoC */
+    dc->user_creatable = false;
 }
 
 /*****************************************************************************/
@@ -1420,6 +1415,8 @@ static void ppc405_soc_instance_init(Object *obj)
 
     object_initialize_child(obj, "cpc", &s->cpc, TYPE_PPC405_CPC);
     object_property_add_alias(obj, "sys-clk", OBJECT(&s->cpc), "sys-clk");
+
+    object_initialize_child(obj, "gpt", &s->gpt, TYPE_PPC405_GPT);
 }
 
 static void ppc405_reset(void *opaque)
@@ -1430,8 +1427,10 @@ static void ppc405_reset(void *opaque)
 static void ppc405_soc_realize(DeviceState *dev, Error **errp)
 {
     Ppc405SoCState *s = PPC405_SOC(dev);
-    qemu_irq dma_irqs[4], gpt_irqs[5], mal_irqs[4];
+    qemu_irq dma_irqs[4], mal_irqs[4];
     CPUPPCState *env;
+    SysBusDevice *sbd;
+    int i;
 
     /* init CPUs */
     if (!qdev_realize(DEVICE(&s->cpu), NULL, errp)) {
@@ -1517,12 +1516,14 @@ static void ppc405_soc_realize(DeviceState *dev, Error **errp)
     ppc405_ocm_init(env);
 
     /* GPT */
-    gpt_irqs[0] = qdev_get_gpio_in(s->uic, 19);
-    gpt_irqs[1] = qdev_get_gpio_in(s->uic, 20);
-    gpt_irqs[2] = qdev_get_gpio_in(s->uic, 21);
-    gpt_irqs[3] = qdev_get_gpio_in(s->uic, 22);
-    gpt_irqs[4] = qdev_get_gpio_in(s->uic, 23);
-    ppc4xx_gpt_init(0xef600000, gpt_irqs);
+    sbd = SYS_BUS_DEVICE(&s->gpt);
+    if (!sysbus_realize(sbd, errp)) {
+        return;
+    }
+    sysbus_mmio_map(sbd, 0, 0xef600000);
+    for (i = 0; i < ARRAY_SIZE(s->gpt.irqs); i++) {
+        sysbus_connect_irq(sbd, i, qdev_get_gpio_in(s->uic, 19 + i));
+    }
 
     /* MAL */
     mal_irqs[0] = qdev_get_gpio_in(s->uic, 11);
@@ -1555,6 +1556,12 @@ static void ppc405_soc_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo ppc405_types[] = {
     {
+        .name           = TYPE_PPC405_GPT,
+        .parent         = TYPE_SYS_BUS_DEVICE,
+        .instance_size  = sizeof(Ppc405GptState),
+        .instance_finalize = ppc405_gpt_finalize,
+        .class_init     = ppc405_gpt_class_init,
+    }, {
         .name           = TYPE_PPC405_CPC,
         .parent         = TYPE_PPC4xx_DCR_DEVICE,
         .instance_size  = sizeof(Ppc405CpcState),
diff --git a/hw/ppc/trace-events b/hw/ppc/trace-events
index 5c0a215cad..adb4500888 100644
--- a/hw/ppc/trace-events
+++ b/hw/ppc/trace-events
@@ -162,7 +162,6 @@ ocm_unmap(const char* prefix, uint32_t isarc) "OCM unmap %s 0x%08" PRIx32
 
 ppc4xx_gpt_read(uint64_t addr, uint32_t size) "addr 0x%" PRIx64 " size %d"
 ppc4xx_gpt_write(uint64_t addr, uint32_t size, uint64_t val) "addr 0x%" PRIx64 " size %d = 0x%" PRIx64
-ppc4xx_gpt_init(uint64_t addr) "offet 0x%" PRIx64
 
 ppc405ep_clocks_compute(const char *param, uint32_t param2, uint32_t val) "%s 0x%1" PRIx32 " %d"
 ppc405ep_clocks_setup(const char *trace) "%s"
-- 
2.30.4


