mirror of https://github.com/xemu-project/xemu.git
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
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/*
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* BCM2838 peripherals emulation
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*
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* Copyright (C) 2022 Ovchinnikov Vitalii <vitalii.ovchinnikov@auriga.com>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu/module.h"
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#include "hw/arm/raspi_platform.h"
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#include "hw/arm/bcm2838_peripherals.h"
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/* Lower peripheral base address on the VC (GPU) system bus */
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#define BCM2838_VC_PERI_LOW_BASE 0x7c000000
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static void bcm2838_peripherals_init(Object *obj)
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{
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BCM2838PeripheralState *s = BCM2838_PERIPHERALS(obj);
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BCM2838PeripheralClass *bc = BCM2838_PERIPHERALS_GET_CLASS(obj);
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/* Lower memory region for peripheral devices (exported to the Soc) */
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memory_region_init(&s->peri_low_mr, obj, "bcm2838-peripherals",
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bc->peri_low_size);
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sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_low_mr);
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}
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static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp)
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{
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BCM2838PeripheralState *s = BCM2838_PERIPHERALS(dev);
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BCMSocPeripheralBaseState *s_base = BCM_SOC_PERIPHERALS_BASE(dev);
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bcm_soc_peripherals_common_realize(dev, errp);
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/* Map lower peripherals into the GPU address space */
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memory_region_init_alias(&s->peri_low_mr_alias, OBJECT(s),
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"bcm2838-peripherals", &s->peri_low_mr, 0,
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memory_region_size(&s->peri_low_mr));
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memory_region_add_subregion_overlap(&s_base->gpu_bus_mr,
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BCM2838_VC_PERI_LOW_BASE,
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&s->peri_low_mr_alias, 1);
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}
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static void bcm2838_peripherals_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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BCM2838PeripheralClass *bc = BCM2838_PERIPHERALS_CLASS(oc);
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BCMSocPeripheralBaseClass *bc_base = BCM_SOC_PERIPHERALS_BASE_CLASS(oc);
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bc->peri_low_size = 0x2000000;
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bc_base->peri_size = 0x1800000;
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dc->realize = bcm2838_peripherals_realize;
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}
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static const TypeInfo bcm2838_peripherals_type_info = {
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.name = TYPE_BCM2838_PERIPHERALS,
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.parent = TYPE_BCM_SOC_PERIPHERALS_BASE,
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.instance_size = sizeof(BCM2838PeripheralState),
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.instance_init = bcm2838_peripherals_init,
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.class_size = sizeof(BCM2838PeripheralClass),
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.class_init = bcm2838_peripherals_class_init,
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};
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static void bcm2838_peripherals_register_types(void)
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{
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type_register_static(&bcm2838_peripherals_type_info);
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}
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type_init(bcm2838_peripherals_register_types)
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