diff mbox series

[v2,5/6] hw/misc: Add a model of the Xilinx ZynqMP APU Control

Message ID 20220203140141.310870-6-edgar.iglesias@gmail.com
State New
Headers show
Series hw/arm: zynqmp: Add CRF and APU control to support PSCI | expand

Commit Message

Edgar E. Iglesias Feb. 3, 2022, 2:01 p.m. UTC 
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>

Add a model of the Xilinx ZynqMP APU Control.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
 include/hw/misc/xlnx-zynqmp-apu-ctrl.h |  95 +++++++++
 hw/misc/xlnx-zynqmp-apu-ctrl.c         | 254 +++++++++++++++++++++++++
 hw/misc/meson.build                    |   1 +
 3 files changed, 350 insertions(+)
 create mode 100644 include/hw/misc/xlnx-zynqmp-apu-ctrl.h
 create mode 100644 hw/misc/xlnx-zynqmp-apu-ctrl.c

Comments

Luc Michel Feb. 3, 2022, 8:44 p.m. UTC | #1 
On 15:01 Thu 03 Feb     , Edgar E. Iglesias wrote:
> From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
> 
> Add a model of the Xilinx ZynqMP APU Control.
> 
> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

Reviewed-by: Luc Michel <luc@lmichel.fr>

> ---
>  include/hw/misc/xlnx-zynqmp-apu-ctrl.h |  95 +++++++++
>  hw/misc/xlnx-zynqmp-apu-ctrl.c         | 254 +++++++++++++++++++++++++
>  hw/misc/meson.build                    |   1 +
>  3 files changed, 350 insertions(+)
>  create mode 100644 include/hw/misc/xlnx-zynqmp-apu-ctrl.h
>  create mode 100644 hw/misc/xlnx-zynqmp-apu-ctrl.c
> 
> diff --git a/include/hw/misc/xlnx-zynqmp-apu-ctrl.h b/include/hw/misc/xlnx-zynqmp-apu-ctrl.h
> new file mode 100644
> index 0000000000..b0c0adb881
> --- /dev/null
> +++ b/include/hw/misc/xlnx-zynqmp-apu-ctrl.h
> @@ -0,0 +1,95 @@
> +/*
> + * QEMU model of ZynqMP APU Control.
> + *
> + * Copyright (c) 2013-2022 Xilinx Inc
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + *
> + * Written by Peter Crosthwaite <peter.crosthwaite@xilinx.com> and
> + * Edgar E. Iglesias <edgar.iglesias@xilinx.com>
> + *
> + */
> +#ifndef HW_MISC_XLNX_ZYNQMP_APU_CTRL_H
> +#define HW_MISC_XLNX_ZYNQMP_APU_CTRL_H
> +
> +#include "hw/sysbus.h"
> +#include "hw/register.h"
> +#include "target/arm/cpu.h"
> +
> +#define TYPE_XLNX_ZYNQMP_APU_CTRL "xlnx.apu-ctrl"
> +
> +#define XLNX_ZYNQMP_APU(obj) \
> +     OBJECT_CHECK(XlnxZynqMPAPUCtrl, (obj), TYPE_XLNX_ZYNQMP_APU_CTRL)
> +
> +REG32(APU_ERR_CTRL, 0x0)
> +    FIELD(APU_ERR_CTRL, PSLVERR, 0, 1)
> +REG32(ISR, 0x10)
> +    FIELD(ISR, INV_APB, 0, 1)
> +REG32(IMR, 0x14)
> +    FIELD(IMR, INV_APB, 0, 1)
> +REG32(IEN, 0x18)
> +    FIELD(IEN, INV_APB, 0, 1)
> +REG32(IDS, 0x1c)
> +    FIELD(IDS, INV_APB, 0, 1)
> +REG32(CONFIG_0, 0x20)
> +    FIELD(CONFIG_0, CFGTE, 24, 4)
> +    FIELD(CONFIG_0, CFGEND, 16, 4)
> +    FIELD(CONFIG_0, VINITHI, 8, 4)
> +    FIELD(CONFIG_0, AA64NAA32, 0, 4)
> +REG32(CONFIG_1, 0x24)
> +    FIELD(CONFIG_1, L2RSTDISABLE, 29, 1)
> +    FIELD(CONFIG_1, L1RSTDISABLE, 28, 1)
> +    FIELD(CONFIG_1, CP15DISABLE, 0, 4)
> +REG32(RVBARADDR0L, 0x40)
> +    FIELD(RVBARADDR0L, ADDR, 2, 30)
> +REG32(RVBARADDR0H, 0x44)
> +    FIELD(RVBARADDR0H, ADDR, 0, 8)
> +REG32(RVBARADDR1L, 0x48)
> +    FIELD(RVBARADDR1L, ADDR, 2, 30)
> +REG32(RVBARADDR1H, 0x4c)
> +    FIELD(RVBARADDR1H, ADDR, 0, 8)
> +REG32(RVBARADDR2L, 0x50)
> +    FIELD(RVBARADDR2L, ADDR, 2, 30)
> +REG32(RVBARADDR2H, 0x54)
> +    FIELD(RVBARADDR2H, ADDR, 0, 8)
> +REG32(RVBARADDR3L, 0x58)
> +    FIELD(RVBARADDR3L, ADDR, 2, 30)
> +REG32(RVBARADDR3H, 0x5c)
> +    FIELD(RVBARADDR3H, ADDR, 0, 8)
> +REG32(ACE_CTRL, 0x60)
> +    FIELD(ACE_CTRL, AWQOS, 16, 4)
> +    FIELD(ACE_CTRL, ARQOS, 0, 4)
> +REG32(SNOOP_CTRL, 0x80)
> +    FIELD(SNOOP_CTRL, ACE_INACT, 4, 1)
> +    FIELD(SNOOP_CTRL, ACP_INACT, 0, 1)
> +REG32(PWRCTL, 0x90)
> +    FIELD(PWRCTL, CLREXMONREQ, 17, 1)
> +    FIELD(PWRCTL, L2FLUSHREQ, 16, 1)
> +    FIELD(PWRCTL, CPUPWRDWNREQ, 0, 4)
> +REG32(PWRSTAT, 0x94)
> +    FIELD(PWRSTAT, CLREXMONACK, 17, 1)
> +    FIELD(PWRSTAT, L2FLUSHDONE, 16, 1)
> +    FIELD(PWRSTAT, DBGNOPWRDWN, 0, 4)
> +
> +#define APU_R_MAX ((R_PWRSTAT) + 1)
> +
> +#define APU_MAX_CPU    4
> +
> +typedef struct XlnxZynqMPAPUCtrl {
> +    SysBusDevice busdev;
> +
> +    ARMCPU *cpus[APU_MAX_CPU];
> +    /* WFIs towards PMU. */
> +    qemu_irq wfi_out[4];
> +    /* CPU Power status towards INTC Redirect. */
> +    qemu_irq cpu_power_status[4];
> +    qemu_irq irq_imr;
> +
> +    uint8_t cpu_pwrdwn_req;
> +    uint8_t cpu_in_wfi;
> +
> +    RegisterInfoArray *reg_array;
> +    uint32_t regs[APU_R_MAX];
> +    RegisterInfo regs_info[APU_R_MAX];
> +} XlnxZynqMPAPUCtrl;
> +
> +#endif
> diff --git a/hw/misc/xlnx-zynqmp-apu-ctrl.c b/hw/misc/xlnx-zynqmp-apu-ctrl.c
> new file mode 100644
> index 0000000000..ea9032e0ed
> --- /dev/null
> +++ b/hw/misc/xlnx-zynqmp-apu-ctrl.c
> @@ -0,0 +1,254 @@
> +/*
> + * QEMU model of the ZynqMP APU Control.
> + *
> + * Copyright (c) 2013-2022 Xilinx Inc
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + *
> + * Written by Peter Crosthwaite <peter.crosthwaite@xilinx.com> and
> + * Edgar E. Iglesias <edgar.iglesias@xilinx.com>
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qapi/error.h"
> +#include "qemu/log.h"
> +#include "migration/vmstate.h"
> +#include "hw/qdev-properties.h"
> +#include "hw/sysbus.h"
> +#include "hw/irq.h"
> +#include "hw/register.h"
> +
> +#include "qemu/bitops.h"
> +#include "qapi/qmp/qerror.h"
> +
> +#include "hw/misc/xlnx-zynqmp-apu-ctrl.h"
> +
> +#ifndef XILINX_ZYNQMP_APU_ERR_DEBUG
> +#define XILINX_ZYNQMP_APU_ERR_DEBUG 1
> +#endif
> +
> +static void update_wfi_out(void *opaque)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(opaque);
> +    unsigned int i, wfi_pending;
> +
> +    wfi_pending = s->cpu_pwrdwn_req & s->cpu_in_wfi;
> +    for (i = 0; i < APU_MAX_CPU; i++) {
> +        qemu_set_irq(s->wfi_out[i], !!(wfi_pending & (1 << i)));
> +    }
> +}
> +
> +static void zynqmp_apu_rvbar_post_write(RegisterInfo *reg, uint64_t val)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
> +    int i;
> +
> +    for (i = 0; i < APU_MAX_CPU; ++i) {
> +        uint64_t rvbar = s->regs[R_RVBARADDR0L + 2 * i] +
> +                         ((uint64_t)s->regs[R_RVBARADDR0H + 2 * i] << 32);
> +        if (s->cpus[i]) {
> +            object_property_set_int(OBJECT(s->cpus[i]), "rvbar", rvbar,
> +                                    &error_abort);
> +        }
> +    }
> +}
> +
> +static void zynqmp_apu_pwrctl_post_write(RegisterInfo *reg, uint64_t val)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
> +    unsigned int i, new;
> +
> +    for (i = 0; i < APU_MAX_CPU; i++) {
> +        new = val & (1 << i);
> +        /* Check if CPU's CPUPWRDNREQ has changed. If yes, update GPIOs. */
> +        if (new != (s->cpu_pwrdwn_req & (1 << i))) {
> +            qemu_set_irq(s->cpu_power_status[i], !!new);
> +        }
> +        s->cpu_pwrdwn_req &= ~(1 << i);
> +        s->cpu_pwrdwn_req |= new;
> +    }
> +    update_wfi_out(s);
> +}
> +
> +static void imr_update_irq(XlnxZynqMPAPUCtrl *s)
> +{
> +    bool pending = s->regs[R_ISR] & ~s->regs[R_IMR];
> +    qemu_set_irq(s->irq_imr, pending);
> +}
> +
> +static void isr_postw(RegisterInfo *reg, uint64_t val64)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
> +    imr_update_irq(s);
> +}
> +
> +static uint64_t ien_prew(RegisterInfo *reg, uint64_t val64)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
> +    uint32_t val = val64;
> +
> +    s->regs[R_IMR] &= ~val;
> +    imr_update_irq(s);
> +    return 0;
> +}
> +
> +static uint64_t ids_prew(RegisterInfo *reg, uint64_t val64)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
> +    uint32_t val = val64;
> +
> +    s->regs[R_IMR] |= val;
> +    imr_update_irq(s);
> +    return 0;
> +}
> +
> +static const RegisterAccessInfo zynqmp_apu_regs_info[] = {
> +#define RVBAR_REGDEF(n) \
> +    {   .name = "RVBAR CPU " #n " Low",  .addr = A_RVBARADDR ## n ## L,    \
> +            .reset = 0xffff0000ul,                                         \
> +            .post_write = zynqmp_apu_rvbar_post_write,                     \
> +    },{ .name = "RVBAR CPU " #n " High", .addr = A_RVBARADDR ## n ## H,    \
> +            .post_write = zynqmp_apu_rvbar_post_write,                     \
> +    }
> +    {   .name = "ERR_CTRL",  .addr = A_APU_ERR_CTRL,
> +    },{ .name = "ISR",  .addr = A_ISR,
> +        .w1c = 0x1,
> +        .post_write = isr_postw,
> +    },{ .name = "IMR",  .addr = A_IMR,
> +        .reset = 0x1,
> +        .ro = 0x1,
> +    },{ .name = "IEN",  .addr = A_IEN,
> +        .pre_write = ien_prew,
> +    },{ .name = "IDS",  .addr = A_IDS,
> +        .pre_write = ids_prew,
> +    },{ .name = "CONFIG_0",  .addr = A_CONFIG_0,
> +        .reset = 0xf0f,
> +    },{ .name = "CONFIG_1",  .addr = A_CONFIG_1,
> +    },
> +    RVBAR_REGDEF(0),
> +    RVBAR_REGDEF(1),
> +    RVBAR_REGDEF(2),
> +    RVBAR_REGDEF(3),
> +    { .name = "ACE_CTRL",  .addr = A_ACE_CTRL,
> +        .reset = 0xf000f,
> +    },{ .name = "SNOOP_CTRL",  .addr = A_SNOOP_CTRL,
> +    },{ .name = "PWRCTL",  .addr = A_PWRCTL,
> +        .post_write = zynqmp_apu_pwrctl_post_write,
> +    },{ .name = "PWRSTAT",  .addr = A_PWRSTAT,
> +        .ro = 0x3000f,
> +    }
> +};
> +
> +static void zynqmp_apu_reset_enter(Object *obj, ResetType type)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(obj);
> +    int i;
> +
> +    for (i = 0; i < APU_R_MAX; ++i) {
> +        register_reset(&s->regs_info[i]);
> +    }
> +
> +    s->cpu_pwrdwn_req = 0;
> +    s->cpu_in_wfi = 0;
> +}
> +
> +static void zynqmp_apu_reset_hold(Object *obj)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(obj);
> +
> +    update_wfi_out(s);
> +    imr_update_irq(s);
> +}
> +
> +static const MemoryRegionOps zynqmp_apu_ops = {
> +    .read = register_read_memory,
> +    .write = register_write_memory,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
> +    .valid = {
> +        .min_access_size = 4,
> +        .max_access_size = 4,
> +    }
> +};
> +
> +static void zynqmp_apu_handle_wfi(void *opaque, int irq, int level)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(opaque);
> +
> +    s->cpu_in_wfi = deposit32(s->cpu_in_wfi, irq, 1, level);
> +    update_wfi_out(s);
> +}
> +
> +static void zynqmp_apu_init(Object *obj)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(obj);
> +    int i;
> +
> +    s->reg_array =
> +        register_init_block32(DEVICE(obj), zynqmp_apu_regs_info,
> +                              ARRAY_SIZE(zynqmp_apu_regs_info),
> +                              s->regs_info, s->regs,
> +                              &zynqmp_apu_ops,
> +                              XILINX_ZYNQMP_APU_ERR_DEBUG,
> +                              APU_R_MAX * 4);
> +    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->reg_array->mem);
> +    sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq_imr);
> +
> +    for (i = 0; i < APU_MAX_CPU; ++i) {
> +        g_autofree gchar *prop_name = g_strdup_printf("cpu%d", i);
> +        object_property_add_link(obj, prop_name, TYPE_ARM_CPU,
> +                                 (Object **)&s->cpus[i],
> +                                 qdev_prop_allow_set_link_before_realize,
> +                                 OBJ_PROP_LINK_STRONG);
> +    }
> +
> +    /* wfi_out is used to connect to PMU GPIs. */
> +    qdev_init_gpio_out_named(DEVICE(obj), s->wfi_out, "wfi_out", 4);
> +    /* CPU_POWER_STATUS is used to connect to INTC redirect. */
> +    qdev_init_gpio_out_named(DEVICE(obj), s->cpu_power_status,
> +                             "CPU_POWER_STATUS", 4);
> +    /* wfi_in is used as input from CPUs as wfi request. */
> +    qdev_init_gpio_in_named(DEVICE(obj), zynqmp_apu_handle_wfi, "wfi_in", 4);
> +}
> +
> +static void zynqmp_apu_finalize(Object *obj)
> +{
> +    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(obj);
> +    register_finalize_block(s->reg_array);
> +}
> +
> +static const VMStateDescription vmstate_zynqmp_apu = {
> +    .name = TYPE_XLNX_ZYNQMP_APU_CTRL,
> +    .version_id = 1,
> +    .minimum_version_id = 1,
> +    .minimum_version_id_old = 1,
> +    .fields = (VMStateField[]) {
> +        VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPAPUCtrl, APU_R_MAX),
> +        VMSTATE_END_OF_LIST(),
> +    }
> +};
> +
> +static void zynqmp_apu_class_init(ObjectClass *klass, void *data)
> +{
> +    ResettableClass *rc = RESETTABLE_CLASS(klass);
> +    DeviceClass *dc = DEVICE_CLASS(klass);
> +
> +    dc->vmsd = &vmstate_zynqmp_apu;
> +
> +    rc->phases.enter = zynqmp_apu_reset_enter;
> +    rc->phases.hold = zynqmp_apu_reset_hold;
> +}
> +
> +static const TypeInfo zynqmp_apu_info = {
> +    .name              = TYPE_XLNX_ZYNQMP_APU_CTRL,
> +    .parent            = TYPE_SYS_BUS_DEVICE,
> +    .instance_size     = sizeof(XlnxZynqMPAPUCtrl),
> +    .class_init        = zynqmp_apu_class_init,
> +    .instance_init     = zynqmp_apu_init,
> +    .instance_finalize = zynqmp_apu_finalize,
> +};
> +
> +static void zynqmp_apu_register_types(void)
> +{
> +    type_register_static(&zynqmp_apu_info);
> +}
> +
> +type_init(zynqmp_apu_register_types)
> diff --git a/hw/misc/meson.build b/hw/misc/meson.build
> index 1927f13a5e..cf9d4cc618 100644
> --- a/hw/misc/meson.build
> +++ b/hw/misc/meson.build
> @@ -85,6 +85,7 @@ softmmu_ss.add(when: 'CONFIG_RASPI', if_true: files(
>  softmmu_ss.add(when: 'CONFIG_SLAVIO', if_true: files('slavio_misc.c'))
>  softmmu_ss.add(when: 'CONFIG_ZYNQ', if_true: files('zynq_slcr.c'))
>  specific_ss.add(when: 'CONFIG_XLNX_ZYNQMP_ARM', if_true: files('xlnx-zynqmp-crf.c'))
> +specific_ss.add(when: 'CONFIG_XLNX_ZYNQMP_ARM', if_true: files('xlnx-zynqmp-apu-ctrl.c'))
>  softmmu_ss.add(when: 'CONFIG_XLNX_VERSAL', if_true: files(
>    'xlnx-versal-xramc.c',
>    'xlnx-versal-pmc-iou-slcr.c',
> -- 
> 2.25.1
> 

--
diff mbox series

Patch

diff --git a/include/hw/misc/xlnx-zynqmp-apu-ctrl.h b/include/hw/misc/xlnx-zynqmp-apu-ctrl.h
new file mode 100644
index 0000000000..b0c0adb881
--- /dev/null
+++ b/include/hw/misc/xlnx-zynqmp-apu-ctrl.h
@@ -0,0 +1,95 @@ 
+/*
+ * QEMU model of ZynqMP APU Control.
+ *
+ * Copyright (c) 2013-2022 Xilinx Inc
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * Written by Peter Crosthwaite <peter.crosthwaite@xilinx.com> and
+ * Edgar E. Iglesias <edgar.iglesias@xilinx.com>
+ *
+ */
+#ifndef HW_MISC_XLNX_ZYNQMP_APU_CTRL_H
+#define HW_MISC_XLNX_ZYNQMP_APU_CTRL_H
+
+#include "hw/sysbus.h"
+#include "hw/register.h"
+#include "target/arm/cpu.h"
+
+#define TYPE_XLNX_ZYNQMP_APU_CTRL "xlnx.apu-ctrl"
+
+#define XLNX_ZYNQMP_APU(obj) \
+     OBJECT_CHECK(XlnxZynqMPAPUCtrl, (obj), TYPE_XLNX_ZYNQMP_APU_CTRL)
+
+REG32(APU_ERR_CTRL, 0x0)
+    FIELD(APU_ERR_CTRL, PSLVERR, 0, 1)
+REG32(ISR, 0x10)
+    FIELD(ISR, INV_APB, 0, 1)
+REG32(IMR, 0x14)
+    FIELD(IMR, INV_APB, 0, 1)
+REG32(IEN, 0x18)
+    FIELD(IEN, INV_APB, 0, 1)
+REG32(IDS, 0x1c)
+    FIELD(IDS, INV_APB, 0, 1)
+REG32(CONFIG_0, 0x20)
+    FIELD(CONFIG_0, CFGTE, 24, 4)
+    FIELD(CONFIG_0, CFGEND, 16, 4)
+    FIELD(CONFIG_0, VINITHI, 8, 4)
+    FIELD(CONFIG_0, AA64NAA32, 0, 4)
+REG32(CONFIG_1, 0x24)
+    FIELD(CONFIG_1, L2RSTDISABLE, 29, 1)
+    FIELD(CONFIG_1, L1RSTDISABLE, 28, 1)
+    FIELD(CONFIG_1, CP15DISABLE, 0, 4)
+REG32(RVBARADDR0L, 0x40)
+    FIELD(RVBARADDR0L, ADDR, 2, 30)
+REG32(RVBARADDR0H, 0x44)
+    FIELD(RVBARADDR0H, ADDR, 0, 8)
+REG32(RVBARADDR1L, 0x48)
+    FIELD(RVBARADDR1L, ADDR, 2, 30)
+REG32(RVBARADDR1H, 0x4c)
+    FIELD(RVBARADDR1H, ADDR, 0, 8)
+REG32(RVBARADDR2L, 0x50)
+    FIELD(RVBARADDR2L, ADDR, 2, 30)
+REG32(RVBARADDR2H, 0x54)
+    FIELD(RVBARADDR2H, ADDR, 0, 8)
+REG32(RVBARADDR3L, 0x58)
+    FIELD(RVBARADDR3L, ADDR, 2, 30)
+REG32(RVBARADDR3H, 0x5c)
+    FIELD(RVBARADDR3H, ADDR, 0, 8)
+REG32(ACE_CTRL, 0x60)
+    FIELD(ACE_CTRL, AWQOS, 16, 4)
+    FIELD(ACE_CTRL, ARQOS, 0, 4)
+REG32(SNOOP_CTRL, 0x80)
+    FIELD(SNOOP_CTRL, ACE_INACT, 4, 1)
+    FIELD(SNOOP_CTRL, ACP_INACT, 0, 1)
+REG32(PWRCTL, 0x90)
+    FIELD(PWRCTL, CLREXMONREQ, 17, 1)
+    FIELD(PWRCTL, L2FLUSHREQ, 16, 1)
+    FIELD(PWRCTL, CPUPWRDWNREQ, 0, 4)
+REG32(PWRSTAT, 0x94)
+    FIELD(PWRSTAT, CLREXMONACK, 17, 1)
+    FIELD(PWRSTAT, L2FLUSHDONE, 16, 1)
+    FIELD(PWRSTAT, DBGNOPWRDWN, 0, 4)
+
+#define APU_R_MAX ((R_PWRSTAT) + 1)
+
+#define APU_MAX_CPU    4
+
+typedef struct XlnxZynqMPAPUCtrl {
+    SysBusDevice busdev;
+
+    ARMCPU *cpus[APU_MAX_CPU];
+    /* WFIs towards PMU. */
+    qemu_irq wfi_out[4];
+    /* CPU Power status towards INTC Redirect. */
+    qemu_irq cpu_power_status[4];
+    qemu_irq irq_imr;
+
+    uint8_t cpu_pwrdwn_req;
+    uint8_t cpu_in_wfi;
+
+    RegisterInfoArray *reg_array;
+    uint32_t regs[APU_R_MAX];
+    RegisterInfo regs_info[APU_R_MAX];
+} XlnxZynqMPAPUCtrl;
+
+#endif
diff --git a/hw/misc/xlnx-zynqmp-apu-ctrl.c b/hw/misc/xlnx-zynqmp-apu-ctrl.c
new file mode 100644
index 0000000000..ea9032e0ed
--- /dev/null
+++ b/hw/misc/xlnx-zynqmp-apu-ctrl.c
@@ -0,0 +1,254 @@ 
+/*
+ * QEMU model of the ZynqMP APU Control.
+ *
+ * Copyright (c) 2013-2022 Xilinx Inc
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * Written by Peter Crosthwaite <peter.crosthwaite@xilinx.com> and
+ * Edgar E. Iglesias <edgar.iglesias@xilinx.com>
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/log.h"
+#include "migration/vmstate.h"
+#include "hw/qdev-properties.h"
+#include "hw/sysbus.h"
+#include "hw/irq.h"
+#include "hw/register.h"
+
+#include "qemu/bitops.h"
+#include "qapi/qmp/qerror.h"
+
+#include "hw/misc/xlnx-zynqmp-apu-ctrl.h"
+
+#ifndef XILINX_ZYNQMP_APU_ERR_DEBUG
+#define XILINX_ZYNQMP_APU_ERR_DEBUG 1
+#endif
+
+static void update_wfi_out(void *opaque)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(opaque);
+    unsigned int i, wfi_pending;
+
+    wfi_pending = s->cpu_pwrdwn_req & s->cpu_in_wfi;
+    for (i = 0; i < APU_MAX_CPU; i++) {
+        qemu_set_irq(s->wfi_out[i], !!(wfi_pending & (1 << i)));
+    }
+}
+
+static void zynqmp_apu_rvbar_post_write(RegisterInfo *reg, uint64_t val)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
+    int i;
+
+    for (i = 0; i < APU_MAX_CPU; ++i) {
+        uint64_t rvbar = s->regs[R_RVBARADDR0L + 2 * i] +
+                         ((uint64_t)s->regs[R_RVBARADDR0H + 2 * i] << 32);
+        if (s->cpus[i]) {
+            object_property_set_int(OBJECT(s->cpus[i]), "rvbar", rvbar,
+                                    &error_abort);
+        }
+    }
+}
+
+static void zynqmp_apu_pwrctl_post_write(RegisterInfo *reg, uint64_t val)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
+    unsigned int i, new;
+
+    for (i = 0; i < APU_MAX_CPU; i++) {
+        new = val & (1 << i);
+        /* Check if CPU's CPUPWRDNREQ has changed. If yes, update GPIOs. */
+        if (new != (s->cpu_pwrdwn_req & (1 << i))) {
+            qemu_set_irq(s->cpu_power_status[i], !!new);
+        }
+        s->cpu_pwrdwn_req &= ~(1 << i);
+        s->cpu_pwrdwn_req |= new;
+    }
+    update_wfi_out(s);
+}
+
+static void imr_update_irq(XlnxZynqMPAPUCtrl *s)
+{
+    bool pending = s->regs[R_ISR] & ~s->regs[R_IMR];
+    qemu_set_irq(s->irq_imr, pending);
+}
+
+static void isr_postw(RegisterInfo *reg, uint64_t val64)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
+    imr_update_irq(s);
+}
+
+static uint64_t ien_prew(RegisterInfo *reg, uint64_t val64)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
+    uint32_t val = val64;
+
+    s->regs[R_IMR] &= ~val;
+    imr_update_irq(s);
+    return 0;
+}
+
+static uint64_t ids_prew(RegisterInfo *reg, uint64_t val64)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(reg->opaque);
+    uint32_t val = val64;
+
+    s->regs[R_IMR] |= val;
+    imr_update_irq(s);
+    return 0;
+}
+
+static const RegisterAccessInfo zynqmp_apu_regs_info[] = {
+#define RVBAR_REGDEF(n) \
+    {   .name = "RVBAR CPU " #n " Low",  .addr = A_RVBARADDR ## n ## L,    \
+            .reset = 0xffff0000ul,                                         \
+            .post_write = zynqmp_apu_rvbar_post_write,                     \
+    },{ .name = "RVBAR CPU " #n " High", .addr = A_RVBARADDR ## n ## H,    \
+            .post_write = zynqmp_apu_rvbar_post_write,                     \
+    }
+    {   .name = "ERR_CTRL",  .addr = A_APU_ERR_CTRL,
+    },{ .name = "ISR",  .addr = A_ISR,
+        .w1c = 0x1,
+        .post_write = isr_postw,
+    },{ .name = "IMR",  .addr = A_IMR,
+        .reset = 0x1,
+        .ro = 0x1,
+    },{ .name = "IEN",  .addr = A_IEN,
+        .pre_write = ien_prew,
+    },{ .name = "IDS",  .addr = A_IDS,
+        .pre_write = ids_prew,
+    },{ .name = "CONFIG_0",  .addr = A_CONFIG_0,
+        .reset = 0xf0f,
+    },{ .name = "CONFIG_1",  .addr = A_CONFIG_1,
+    },
+    RVBAR_REGDEF(0),
+    RVBAR_REGDEF(1),
+    RVBAR_REGDEF(2),
+    RVBAR_REGDEF(3),
+    { .name = "ACE_CTRL",  .addr = A_ACE_CTRL,
+        .reset = 0xf000f,
+    },{ .name = "SNOOP_CTRL",  .addr = A_SNOOP_CTRL,
+    },{ .name = "PWRCTL",  .addr = A_PWRCTL,
+        .post_write = zynqmp_apu_pwrctl_post_write,
+    },{ .name = "PWRSTAT",  .addr = A_PWRSTAT,
+        .ro = 0x3000f,
+    }
+};
+
+static void zynqmp_apu_reset_enter(Object *obj, ResetType type)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(obj);
+    int i;
+
+    for (i = 0; i < APU_R_MAX; ++i) {
+        register_reset(&s->regs_info[i]);
+    }
+
+    s->cpu_pwrdwn_req = 0;
+    s->cpu_in_wfi = 0;
+}
+
+static void zynqmp_apu_reset_hold(Object *obj)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(obj);
+
+    update_wfi_out(s);
+    imr_update_irq(s);
+}
+
+static const MemoryRegionOps zynqmp_apu_ops = {
+    .read = register_read_memory,
+    .write = register_write_memory,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    }
+};
+
+static void zynqmp_apu_handle_wfi(void *opaque, int irq, int level)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(opaque);
+
+    s->cpu_in_wfi = deposit32(s->cpu_in_wfi, irq, 1, level);
+    update_wfi_out(s);
+}
+
+static void zynqmp_apu_init(Object *obj)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(obj);
+    int i;
+
+    s->reg_array =
+        register_init_block32(DEVICE(obj), zynqmp_apu_regs_info,
+                              ARRAY_SIZE(zynqmp_apu_regs_info),
+                              s->regs_info, s->regs,
+                              &zynqmp_apu_ops,
+                              XILINX_ZYNQMP_APU_ERR_DEBUG,
+                              APU_R_MAX * 4);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->reg_array->mem);
+    sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq_imr);
+
+    for (i = 0; i < APU_MAX_CPU; ++i) {
+        g_autofree gchar *prop_name = g_strdup_printf("cpu%d", i);
+        object_property_add_link(obj, prop_name, TYPE_ARM_CPU,
+                                 (Object **)&s->cpus[i],
+                                 qdev_prop_allow_set_link_before_realize,
+                                 OBJ_PROP_LINK_STRONG);
+    }
+
+    /* wfi_out is used to connect to PMU GPIs. */
+    qdev_init_gpio_out_named(DEVICE(obj), s->wfi_out, "wfi_out", 4);
+    /* CPU_POWER_STATUS is used to connect to INTC redirect. */
+    qdev_init_gpio_out_named(DEVICE(obj), s->cpu_power_status,
+                             "CPU_POWER_STATUS", 4);
+    /* wfi_in is used as input from CPUs as wfi request. */
+    qdev_init_gpio_in_named(DEVICE(obj), zynqmp_apu_handle_wfi, "wfi_in", 4);
+}
+
+static void zynqmp_apu_finalize(Object *obj)
+{
+    XlnxZynqMPAPUCtrl *s = XLNX_ZYNQMP_APU(obj);
+    register_finalize_block(s->reg_array);
+}
+
+static const VMStateDescription vmstate_zynqmp_apu = {
+    .name = TYPE_XLNX_ZYNQMP_APU_CTRL,
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPAPUCtrl, APU_R_MAX),
+        VMSTATE_END_OF_LIST(),
+    }
+};
+
+static void zynqmp_apu_class_init(ObjectClass *klass, void *data)
+{
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->vmsd = &vmstate_zynqmp_apu;
+
+    rc->phases.enter = zynqmp_apu_reset_enter;
+    rc->phases.hold = zynqmp_apu_reset_hold;
+}
+
+static const TypeInfo zynqmp_apu_info = {
+    .name              = TYPE_XLNX_ZYNQMP_APU_CTRL,
+    .parent            = TYPE_SYS_BUS_DEVICE,
+    .instance_size     = sizeof(XlnxZynqMPAPUCtrl),
+    .class_init        = zynqmp_apu_class_init,
+    .instance_init     = zynqmp_apu_init,
+    .instance_finalize = zynqmp_apu_finalize,
+};
+
+static void zynqmp_apu_register_types(void)
+{
+    type_register_static(&zynqmp_apu_info);
+}
+
+type_init(zynqmp_apu_register_types)
diff --git a/hw/misc/meson.build b/hw/misc/meson.build
index 1927f13a5e..cf9d4cc618 100644
--- a/hw/misc/meson.build
+++ b/hw/misc/meson.build
@@ -85,6 +85,7 @@  softmmu_ss.add(when: 'CONFIG_RASPI', if_true: files(
 softmmu_ss.add(when: 'CONFIG_SLAVIO', if_true: files('slavio_misc.c'))
 softmmu_ss.add(when: 'CONFIG_ZYNQ', if_true: files('zynq_slcr.c'))
 specific_ss.add(when: 'CONFIG_XLNX_ZYNQMP_ARM', if_true: files('xlnx-zynqmp-crf.c'))
+specific_ss.add(when: 'CONFIG_XLNX_ZYNQMP_ARM', if_true: files('xlnx-zynqmp-apu-ctrl.c'))
 softmmu_ss.add(when: 'CONFIG_XLNX_VERSAL', if_true: files(
   'xlnx-versal-xramc.c',
   'xlnx-versal-pmc-iou-slcr.c',