Unverified Commit a0e89303 authored by Artyom Tarasenko's avatar Artyom Tarasenko
Browse files

target-sparc: implement sun4v RTC 



Signed-off-by: default avatarArtyom Tarasenko <atar4qemu@gmail.com>
parent 3390537b

MAINTAINERS

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@@ -1098,6 +1098,12 @@ F: hw/nvram/chrp_nvram.c 
F: include/hw/nvram/chrp_nvram.h

F: tests/prom-env-test.c



sun4v RTC

M: Artyom Tarasenko <atar4qemu@gmail.com>

S: Maintained

F: hw/timer/sun4v-rtc.c

F: include/hw/timer/sun4v-rtc.h



Subsystems

----------

Audio

hw/timer/Makefile.objs

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@@ -34,3 +34,5 @@ obj-$(CONFIG_ALLWINNER_A10_PIT) += allwinner-a10-pit.o 


common-obj-$(CONFIG_STM32F2XX_TIMER) += stm32f2xx_timer.o

common-obj-$(CONFIG_ASPEED_SOC) += aspeed_timer.o



common-obj-$(CONFIG_SUN4V_RTC) += sun4v-rtc.o

hw/timer/sun4v-rtc.c

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/*

 * QEMU sun4v Real Time Clock device

 *

 * The sun4v_rtc device (sun4v tod clock)

 *

 * Copyright (c) 2016 Artyom Tarasenko

 *

 * This code is licensed under the GNU GPL v3 or (at your option) any later

 * version.

 */



#include "qemu/osdep.h"

#include "hw/hw.h"

#include "hw/sysbus.h"

#include "qemu/timer.h"

#include "hw/timer/sun4v-rtc.h"



//#define DEBUG_SUN4V_RTC



#ifdef DEBUG_SUN4V_RTC

#define DPRINTF(fmt, ...)                                       \

    do { printf("sun4v_rtc: " fmt , ## __VA_ARGS__); } while (0)

#else

#define DPRINTF(fmt, ...) do {} while (0)

#endif



#define TYPE_SUN4V_RTC "sun4v_rtc"

#define SUN4V_RTC(obj) OBJECT_CHECK(Sun4vRtc, (obj), TYPE_SUN4V_RTC)



typedef struct Sun4vRtc {

    SysBusDevice parent_obj;



    MemoryRegion iomem;

} Sun4vRtc;



static uint64_t sun4v_rtc_read(void *opaque, hwaddr addr,

                                unsigned size)

{

    uint64_t val = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) / 1000;

    if (!(addr & 4ULL)) {

        /* accessing the high 32 bits */

        val >>= 32;

    }

    DPRINTF("read from " TARGET_FMT_plx " val %lx\n", addr, val);

    return val;

}



static void sun4v_rtc_write(void *opaque, hwaddr addr,

                             uint64_t val, unsigned size)

{

    DPRINTF("write 0x%x to " TARGET_FMT_plx "\n", (unsigned)val, addr);

}



static const MemoryRegionOps sun4v_rtc_ops = {

    .read = sun4v_rtc_read,

    .write = sun4v_rtc_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};



void sun4v_rtc_init(hwaddr addr)

{

    DeviceState *dev;

    SysBusDevice *s;



    dev = qdev_create(NULL, TYPE_SUN4V_RTC);

    s = SYS_BUS_DEVICE(dev);



    qdev_init_nofail(dev);



    sysbus_mmio_map(s, 0, addr);

}



static int sun4v_rtc_init1(SysBusDevice *dev)

{

    Sun4vRtc *s = SUN4V_RTC(dev);



    memory_region_init_io(&s->iomem, OBJECT(s), &sun4v_rtc_ops, s,

                          "sun4v-rtc", 0x08ULL);

    sysbus_init_mmio(dev, &s->iomem);

    return 0;

}



static void sun4v_rtc_class_init(ObjectClass *klass, void *data)

{

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);



    k->init = sun4v_rtc_init1;

}



static const TypeInfo sun4v_rtc_info = {

    .name          = TYPE_SUN4V_RTC,

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(Sun4vRtc),

    .class_init    = sun4v_rtc_class_init,

};



static void sun4v_rtc_register_types(void)

{

    type_register_static(&sun4v_rtc_info);

}



type_init(sun4v_rtc_register_types)

include/hw/timer/sun4v-rtc.h

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void sun4v_rtc_init(hwaddr addr);