diff mbox series

[RESEND,3/9] hw/misc: Add Microchip PolarFire SoC IOSCB module support

Message ID 20201027141740.18336-4-bmeng.cn@gmail.com (mailing list archive)
State New, archived
Headers show
Series hw/riscv: microchip_pfsoc: Support factory HSS boot out of the box | expand

Commit Message

Bin Meng Oct. 27, 2020, 2:17 p.m. UTC
From: Bin Meng <bin.meng@windriver.com>

This creates a model for PolarFire SoC IOSCB [1] module. It actually
contains lots of sub-modules like various PLLs to control different
peripherals. Only the mininum capabilities are emulated to make the
HSS DDR memory initialization codes happy. Lots of sub-modules are
created as an unimplemented devices.

[1] PF_SoC_RegMap_V1_1/MPFS250T/mpfs250t_ioscb_memmap_dri.htm in
    https://www.microsemi.com/document-portal/doc_download/1244581-polarfire-soc-register-map

Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 MAINTAINERS                        |   2 +
 hw/misc/Kconfig                    |   3 +
 hw/misc/mchp_pfsoc_ioscb.c         | 242 +++++++++++++++++++++++++++++
 hw/misc/meson.build                |   1 +
 include/hw/misc/mchp_pfsoc_ioscb.h |  50 ++++++
 5 files changed, 298 insertions(+)
 create mode 100644 hw/misc/mchp_pfsoc_ioscb.c
 create mode 100644 include/hw/misc/mchp_pfsoc_ioscb.h

Comments

Alistair Francis Oct. 27, 2020, 8:48 p.m. UTC | #1
On Tue, Oct 27, 2020 at 7:50 AM Bin Meng <bmeng.cn@gmail.com> wrote:
>
> From: Bin Meng <bin.meng@windriver.com>
>
> This creates a model for PolarFire SoC IOSCB [1] module. It actually
> contains lots of sub-modules like various PLLs to control different
> peripherals. Only the mininum capabilities are emulated to make the
> HSS DDR memory initialization codes happy. Lots of sub-modules are
> created as an unimplemented devices.
>
> [1] PF_SoC_RegMap_V1_1/MPFS250T/mpfs250t_ioscb_memmap_dri.htm in
>     https://www.microsemi.com/document-portal/doc_download/1244581-polarfire-soc-register-map
>
> Signed-off-by: Bin Meng <bin.meng@windriver.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>
>  MAINTAINERS                        |   2 +
>  hw/misc/Kconfig                    |   3 +
>  hw/misc/mchp_pfsoc_ioscb.c         | 242 +++++++++++++++++++++++++++++
>  hw/misc/meson.build                |   1 +
>  include/hw/misc/mchp_pfsoc_ioscb.h |  50 ++++++
>  5 files changed, 298 insertions(+)
>  create mode 100644 hw/misc/mchp_pfsoc_ioscb.c
>  create mode 100644 include/hw/misc/mchp_pfsoc_ioscb.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index caacec401c..ebbc62a62f 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1327,9 +1327,11 @@ S: Supported
>  F: hw/riscv/microchip_pfsoc.c
>  F: hw/char/mchp_pfsoc_mmuart.c
>  F: hw/misc/mchp_pfsoc_dmc.c
> +F: hw/misc/mchp_pfsoc_ioscb.c
>  F: include/hw/riscv/microchip_pfsoc.h
>  F: include/hw/char/mchp_pfsoc_mmuart.h
>  F: include/hw/misc/mchp_pfsoc_dmc.h
> +F: include/hw/misc/mchp_pfsoc_ioscb.h
>
>  RX Machines
>  -----------
> diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
> index 198bb1c6ba..3db15e06b4 100644
> --- a/hw/misc/Kconfig
> +++ b/hw/misc/Kconfig
> @@ -137,6 +137,9 @@ config AVR_POWER
>  config MCHP_PFSOC_DMC
>      bool
>
> +config MCHP_PFSOC_IOSCB
> +    bool
> +
>  config SIFIVE_TEST
>      bool
>
> diff --git a/hw/misc/mchp_pfsoc_ioscb.c b/hw/misc/mchp_pfsoc_ioscb.c
> new file mode 100644
> index 0000000000..32b88f53c1
> --- /dev/null
> +++ b/hw/misc/mchp_pfsoc_ioscb.c
> @@ -0,0 +1,242 @@
> +/*
> + * Microchip PolarFire SoC IOSCB module emulation
> + *
> + * Copyright (c) 2020 Wind River Systems, Inc.
> + *
> + * Author:
> + *   Bin Meng <bin.meng@windriver.com>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 or
> + * (at your option) version 3 of the License.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qemu/bitops.h"
> +#include "qemu/log.h"
> +#include "qapi/error.h"
> +#include "hw/hw.h"
> +#include "hw/sysbus.h"
> +#include "hw/misc/mchp_pfsoc_ioscb.h"
> +
> +/*
> + * The whole IOSCB module registers map into the system address at 0x3000_0000,
> + * named as "System Port 0 (AXI-D0)".
> + */
> +#define IOSCB_WHOLE_REG_SIZE        0x10000000
> +#define IOSCB_SUBMOD_REG_SIZE       0x1000
> +
> +/*
> + * There are many sub-modules in the IOSCB module.
> + * See Microchip PolarFire SoC documentation (Register_Map.zip),
> + * Register Map/PF_SoC_RegMap_V1_1/MPFS250T/mpfs250t_ioscb_memmap_dri.htm
> + *
> + * The following are sub-modules offsets that are of concern.
> + */
> +#define IOSCB_LANE01_BASE           0x06500000
> +#define IOSCB_LANE23_BASE           0x06510000
> +#define IOSCB_CTRL_BASE             0x07020000
> +#define IOSCB_CFG_BASE              0x07080000
> +#define IOSCB_PLL_MSS_BASE          0x0E001000
> +#define IOSCB_CFM_MSS_BASE          0x0E002000
> +#define IOSCB_PLL_DDR_BASE          0x0E010000
> +#define IOSCB_BC_DDR_BASE           0x0E020000
> +#define IOSCB_IO_CALIB_DDR_BASE     0x0E040000
> +#define IOSCB_PLL_SGMII_BASE        0x0E080000
> +#define IOSCB_DLL_SGMII_BASE        0x0E100000
> +#define IOSCB_CFM_SGMII_BASE        0x0E200000
> +#define IOSCB_BC_SGMII_BASE         0x0E400000
> +#define IOSCB_IO_CALIB_SGMII_BASE   0x0E800000
> +
> +static uint64_t mchp_pfsoc_dummy_read(void *opaque, hwaddr offset,
> +                                      unsigned size)
> +{
> +    qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
> +                  "(size %d, offset 0x%" HWADDR_PRIx ")\n",
> +                  __func__, size, offset);
> +
> +    return 0;
> +}
> +
> +static void mchp_pfsoc_dummy_write(void *opaque, hwaddr offset,
> +                                   uint64_t value, unsigned size)
> +{
> +    qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
> +                  "(size %d, value 0x%" PRIx64
> +                  ", offset 0x%" HWADDR_PRIx ")\n",
> +                  __func__, size, value, offset);
> +}
> +
> +static const MemoryRegionOps mchp_pfsoc_dummy_ops = {
> +    .read = mchp_pfsoc_dummy_read,
> +    .write = mchp_pfsoc_dummy_write,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
> +};
> +
> +/* All PLL modules in IOSCB have the same register layout */
> +
> +#define PLL_CTRL    0x04
> +
> +static uint64_t mchp_pfsoc_pll_read(void *opaque, hwaddr offset,
> +                                    unsigned size)
> +{
> +    uint32_t val = 0;
> +
> +    switch (offset) {
> +    case PLL_CTRL:
> +        /* PLL is locked */
> +        val = BIT(25);
> +        break;
> +    default:
> +        qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
> +                      "(size %d, offset 0x%" HWADDR_PRIx ")\n",
> +                      __func__, size, offset);
> +        break;
> +    }
> +
> +    return val;
> +}
> +
> +static const MemoryRegionOps mchp_pfsoc_pll_ops = {
> +    .read = mchp_pfsoc_pll_read,
> +    .write = mchp_pfsoc_dummy_write,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
> +};
> +
> +/* IO_CALIB_DDR submodule */
> +
> +#define IO_CALIB_DDR_IOC_REG1   0x08
> +
> +static uint64_t mchp_pfsoc_io_calib_ddr_read(void *opaque, hwaddr offset,
> +                                             unsigned size)
> +{
> +    uint32_t val = 0;
> +
> +    switch (offset) {
> +    case IO_CALIB_DDR_IOC_REG1:
> +        /* calibration completed */
> +        val = BIT(2);
> +        break;
> +    default:
> +        qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
> +                      "(size %d, offset 0x%" HWADDR_PRIx ")\n",
> +                      __func__, size, offset);
> +        break;
> +    }
> +
> +    return val;
> +}
> +
> +static const MemoryRegionOps mchp_pfsoc_io_calib_ddr_ops = {
> +    .read = mchp_pfsoc_io_calib_ddr_read,
> +    .write = mchp_pfsoc_dummy_write,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
> +};
> +
> +static void mchp_pfsoc_ioscb_realize(DeviceState *dev, Error **errp)
> +{
> +    MchpPfSoCIoscbState *s = MCHP_PFSOC_IOSCB(dev);
> +    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
> +
> +    memory_region_init(&s->container, OBJECT(s),
> +                       "mchp.pfsoc.ioscb", IOSCB_WHOLE_REG_SIZE);
> +    sysbus_init_mmio(sbd, &s->container);
> +
> +    /* add subregions for all sub-modules in IOSCB */
> +
> +    memory_region_init_io(&s->lane01, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.lane01", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_LANE01_BASE, &s->lane01);
> +
> +    memory_region_init_io(&s->lane23, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.lane23", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_LANE23_BASE, &s->lane23);
> +
> +    memory_region_init_io(&s->ctrl, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.ctrl", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_CTRL_BASE, &s->ctrl);
> +
> +    memory_region_init_io(&s->cfg, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.cfg", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_CFG_BASE, &s->cfg);
> +
> +    memory_region_init_io(&s->pll_mss, OBJECT(s), &mchp_pfsoc_pll_ops, s,
> +                          "mchp.pfsoc.ioscb.pll_mss", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_PLL_MSS_BASE, &s->pll_mss);
> +
> +    memory_region_init_io(&s->cfm_mss, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.cfm_mss", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_CFM_MSS_BASE, &s->cfm_mss);
> +
> +    memory_region_init_io(&s->pll_ddr, OBJECT(s), &mchp_pfsoc_pll_ops, s,
> +                          "mchp.pfsoc.ioscb.pll_ddr", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_PLL_DDR_BASE, &s->pll_ddr);
> +
> +    memory_region_init_io(&s->bc_ddr, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.bc_ddr", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_BC_DDR_BASE, &s->bc_ddr);
> +
> +    memory_region_init_io(&s->io_calib_ddr, OBJECT(s),
> +                          &mchp_pfsoc_io_calib_ddr_ops, s,
> +                          "mchp.pfsoc.ioscb.io_calib_ddr",
> +                          IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_DDR_BASE,
> +                                &s->io_calib_ddr);
> +
> +    memory_region_init_io(&s->pll_sgmii, OBJECT(s), &mchp_pfsoc_pll_ops, s,
> +                          "mchp.pfsoc.ioscb.pll_sgmii", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_PLL_SGMII_BASE,
> +                                &s->pll_sgmii);
> +
> +    memory_region_init_io(&s->dll_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.dll_sgmii", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_DLL_SGMII_BASE,
> +                                &s->dll_sgmii);
> +
> +    memory_region_init_io(&s->cfm_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.cfm_sgmii", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_CFM_SGMII_BASE,
> +                                &s->cfm_sgmii);
> +
> +    memory_region_init_io(&s->bc_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
> +                          "mchp.pfsoc.ioscb.bc_sgmii", IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_BC_SGMII_BASE,
> +                                &s->bc_sgmii);
> +
> +    memory_region_init_io(&s->io_calib_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops,
> +                          s, "mchp.pfsoc.ioscb.io_calib_sgmii",
> +                          IOSCB_SUBMOD_REG_SIZE);
> +    memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_SGMII_BASE,
> +                                &s->io_calib_sgmii);
> +}
> +
> +static void mchp_pfsoc_ioscb_class_init(ObjectClass *klass, void *data)
> +{
> +    DeviceClass *dc = DEVICE_CLASS(klass);
> +
> +    dc->desc = "Microchip PolarFire SoC IOSCB";
> +    dc->realize = mchp_pfsoc_ioscb_realize;
> +}
> +
> +static const TypeInfo mchp_pfsoc_ioscb_info = {
> +    .name          = TYPE_MCHP_PFSOC_IOSCB,
> +    .parent        = TYPE_SYS_BUS_DEVICE,
> +    .instance_size = sizeof(MchpPfSoCIoscbState),
> +    .class_init    = mchp_pfsoc_ioscb_class_init,
> +};
> +
> +static void mchp_pfsoc_ioscb_register_types(void)
> +{
> +    type_register_static(&mchp_pfsoc_ioscb_info);
> +}
> +
> +type_init(mchp_pfsoc_ioscb_register_types)
> diff --git a/hw/misc/meson.build b/hw/misc/meson.build
> index 2d79a657e0..6d3c1a3455 100644
> --- a/hw/misc/meson.build
> +++ b/hw/misc/meson.build
> @@ -23,6 +23,7 @@ softmmu_ss.add(when: 'CONFIG_MOS6522', if_true: files('mos6522.c'))
>
>  # RISC-V devices
>  softmmu_ss.add(when: 'CONFIG_MCHP_PFSOC_DMC', if_true: files('mchp_pfsoc_dmc.c'))
> +softmmu_ss.add(when: 'CONFIG_MCHP_PFSOC_IOSCB', if_true: files('mchp_pfsoc_ioscb.c'))
>  softmmu_ss.add(when: 'CONFIG_SIFIVE_TEST', if_true: files('sifive_test.c'))
>  softmmu_ss.add(when: 'CONFIG_SIFIVE_E_PRCI', if_true: files('sifive_e_prci.c'))
>  softmmu_ss.add(when: 'CONFIG_SIFIVE_U_OTP', if_true: files('sifive_u_otp.c'))
> diff --git a/include/hw/misc/mchp_pfsoc_ioscb.h b/include/hw/misc/mchp_pfsoc_ioscb.h
> new file mode 100644
> index 0000000000..9235523e33
> --- /dev/null
> +++ b/include/hw/misc/mchp_pfsoc_ioscb.h
> @@ -0,0 +1,50 @@
> +/*
> + * Microchip PolarFire SoC IOSCB module emulation
> + *
> + * Copyright (c) 2020 Wind River Systems, Inc.
> + *
> + * Author:
> + *   Bin Meng <bin.meng@windriver.com>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 or
> + * (at your option) version 3 of the License.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#ifndef MCHP_PFSOC_IOSCB_H
> +#define MCHP_PFSOC_IOSCB_H
> +
> +typedef struct MchpPfSoCIoscbState {
> +    SysBusDevice parent;
> +    MemoryRegion container;
> +    MemoryRegion lane01;
> +    MemoryRegion lane23;
> +    MemoryRegion ctrl;
> +    MemoryRegion cfg;
> +    MemoryRegion pll_mss;
> +    MemoryRegion cfm_mss;
> +    MemoryRegion pll_ddr;
> +    MemoryRegion bc_ddr;
> +    MemoryRegion io_calib_ddr;
> +    MemoryRegion pll_sgmii;
> +    MemoryRegion dll_sgmii;
> +    MemoryRegion cfm_sgmii;
> +    MemoryRegion bc_sgmii;
> +    MemoryRegion io_calib_sgmii;
> +} MchpPfSoCIoscbState;
> +
> +#define TYPE_MCHP_PFSOC_IOSCB "mchp.pfsoc.ioscb"
> +
> +#define MCHP_PFSOC_IOSCB(obj) \
> +    OBJECT_CHECK(MchpPfSoCIoscbState, (obj), TYPE_MCHP_PFSOC_IOSCB)
> +
> +#endif /* MCHP_PFSOC_IOSCB_H */
> --
> 2.25.1
>
>
diff mbox series

Patch

diff --git a/MAINTAINERS b/MAINTAINERS
index caacec401c..ebbc62a62f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1327,9 +1327,11 @@  S: Supported
 F: hw/riscv/microchip_pfsoc.c
 F: hw/char/mchp_pfsoc_mmuart.c
 F: hw/misc/mchp_pfsoc_dmc.c
+F: hw/misc/mchp_pfsoc_ioscb.c
 F: include/hw/riscv/microchip_pfsoc.h
 F: include/hw/char/mchp_pfsoc_mmuart.h
 F: include/hw/misc/mchp_pfsoc_dmc.h
+F: include/hw/misc/mchp_pfsoc_ioscb.h
 
 RX Machines
 -----------
diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
index 198bb1c6ba..3db15e06b4 100644
--- a/hw/misc/Kconfig
+++ b/hw/misc/Kconfig
@@ -137,6 +137,9 @@  config AVR_POWER
 config MCHP_PFSOC_DMC
     bool
 
+config MCHP_PFSOC_IOSCB
+    bool
+
 config SIFIVE_TEST
     bool
 
diff --git a/hw/misc/mchp_pfsoc_ioscb.c b/hw/misc/mchp_pfsoc_ioscb.c
new file mode 100644
index 0000000000..32b88f53c1
--- /dev/null
+++ b/hw/misc/mchp_pfsoc_ioscb.c
@@ -0,0 +1,242 @@ 
+/*
+ * Microchip PolarFire SoC IOSCB module emulation
+ *
+ * Copyright (c) 2020 Wind River Systems, Inc.
+ *
+ * Author:
+ *   Bin Meng <bin.meng@windriver.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/bitops.h"
+#include "qemu/log.h"
+#include "qapi/error.h"
+#include "hw/hw.h"
+#include "hw/sysbus.h"
+#include "hw/misc/mchp_pfsoc_ioscb.h"
+
+/*
+ * The whole IOSCB module registers map into the system address at 0x3000_0000,
+ * named as "System Port 0 (AXI-D0)".
+ */
+#define IOSCB_WHOLE_REG_SIZE        0x10000000
+#define IOSCB_SUBMOD_REG_SIZE       0x1000
+
+/*
+ * There are many sub-modules in the IOSCB module.
+ * See Microchip PolarFire SoC documentation (Register_Map.zip),
+ * Register Map/PF_SoC_RegMap_V1_1/MPFS250T/mpfs250t_ioscb_memmap_dri.htm
+ *
+ * The following are sub-modules offsets that are of concern.
+ */
+#define IOSCB_LANE01_BASE           0x06500000
+#define IOSCB_LANE23_BASE           0x06510000
+#define IOSCB_CTRL_BASE             0x07020000
+#define IOSCB_CFG_BASE              0x07080000
+#define IOSCB_PLL_MSS_BASE          0x0E001000
+#define IOSCB_CFM_MSS_BASE          0x0E002000
+#define IOSCB_PLL_DDR_BASE          0x0E010000
+#define IOSCB_BC_DDR_BASE           0x0E020000
+#define IOSCB_IO_CALIB_DDR_BASE     0x0E040000
+#define IOSCB_PLL_SGMII_BASE        0x0E080000
+#define IOSCB_DLL_SGMII_BASE        0x0E100000
+#define IOSCB_CFM_SGMII_BASE        0x0E200000
+#define IOSCB_BC_SGMII_BASE         0x0E400000
+#define IOSCB_IO_CALIB_SGMII_BASE   0x0E800000
+
+static uint64_t mchp_pfsoc_dummy_read(void *opaque, hwaddr offset,
+                                      unsigned size)
+{
+    qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
+                  "(size %d, offset 0x%" HWADDR_PRIx ")\n",
+                  __func__, size, offset);
+
+    return 0;
+}
+
+static void mchp_pfsoc_dummy_write(void *opaque, hwaddr offset,
+                                   uint64_t value, unsigned size)
+{
+    qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
+                  "(size %d, value 0x%" PRIx64
+                  ", offset 0x%" HWADDR_PRIx ")\n",
+                  __func__, size, value, offset);
+}
+
+static const MemoryRegionOps mchp_pfsoc_dummy_ops = {
+    .read = mchp_pfsoc_dummy_read,
+    .write = mchp_pfsoc_dummy_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+/* All PLL modules in IOSCB have the same register layout */
+
+#define PLL_CTRL    0x04
+
+static uint64_t mchp_pfsoc_pll_read(void *opaque, hwaddr offset,
+                                    unsigned size)
+{
+    uint32_t val = 0;
+
+    switch (offset) {
+    case PLL_CTRL:
+        /* PLL is locked */
+        val = BIT(25);
+        break;
+    default:
+        qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
+                      "(size %d, offset 0x%" HWADDR_PRIx ")\n",
+                      __func__, size, offset);
+        break;
+    }
+
+    return val;
+}
+
+static const MemoryRegionOps mchp_pfsoc_pll_ops = {
+    .read = mchp_pfsoc_pll_read,
+    .write = mchp_pfsoc_dummy_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+/* IO_CALIB_DDR submodule */
+
+#define IO_CALIB_DDR_IOC_REG1   0x08
+
+static uint64_t mchp_pfsoc_io_calib_ddr_read(void *opaque, hwaddr offset,
+                                             unsigned size)
+{
+    uint32_t val = 0;
+
+    switch (offset) {
+    case IO_CALIB_DDR_IOC_REG1:
+        /* calibration completed */
+        val = BIT(2);
+        break;
+    default:
+        qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
+                      "(size %d, offset 0x%" HWADDR_PRIx ")\n",
+                      __func__, size, offset);
+        break;
+    }
+
+    return val;
+}
+
+static const MemoryRegionOps mchp_pfsoc_io_calib_ddr_ops = {
+    .read = mchp_pfsoc_io_calib_ddr_read,
+    .write = mchp_pfsoc_dummy_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static void mchp_pfsoc_ioscb_realize(DeviceState *dev, Error **errp)
+{
+    MchpPfSoCIoscbState *s = MCHP_PFSOC_IOSCB(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+
+    memory_region_init(&s->container, OBJECT(s),
+                       "mchp.pfsoc.ioscb", IOSCB_WHOLE_REG_SIZE);
+    sysbus_init_mmio(sbd, &s->container);
+
+    /* add subregions for all sub-modules in IOSCB */
+
+    memory_region_init_io(&s->lane01, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.lane01", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_LANE01_BASE, &s->lane01);
+
+    memory_region_init_io(&s->lane23, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.lane23", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_LANE23_BASE, &s->lane23);
+
+    memory_region_init_io(&s->ctrl, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.ctrl", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_CTRL_BASE, &s->ctrl);
+
+    memory_region_init_io(&s->cfg, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.cfg", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_CFG_BASE, &s->cfg);
+
+    memory_region_init_io(&s->pll_mss, OBJECT(s), &mchp_pfsoc_pll_ops, s,
+                          "mchp.pfsoc.ioscb.pll_mss", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_PLL_MSS_BASE, &s->pll_mss);
+
+    memory_region_init_io(&s->cfm_mss, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.cfm_mss", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_CFM_MSS_BASE, &s->cfm_mss);
+
+    memory_region_init_io(&s->pll_ddr, OBJECT(s), &mchp_pfsoc_pll_ops, s,
+                          "mchp.pfsoc.ioscb.pll_ddr", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_PLL_DDR_BASE, &s->pll_ddr);
+
+    memory_region_init_io(&s->bc_ddr, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.bc_ddr", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_BC_DDR_BASE, &s->bc_ddr);
+
+    memory_region_init_io(&s->io_calib_ddr, OBJECT(s),
+                          &mchp_pfsoc_io_calib_ddr_ops, s,
+                          "mchp.pfsoc.ioscb.io_calib_ddr",
+                          IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_DDR_BASE,
+                                &s->io_calib_ddr);
+
+    memory_region_init_io(&s->pll_sgmii, OBJECT(s), &mchp_pfsoc_pll_ops, s,
+                          "mchp.pfsoc.ioscb.pll_sgmii", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_PLL_SGMII_BASE,
+                                &s->pll_sgmii);
+
+    memory_region_init_io(&s->dll_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.dll_sgmii", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_DLL_SGMII_BASE,
+                                &s->dll_sgmii);
+
+    memory_region_init_io(&s->cfm_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.cfm_sgmii", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_CFM_SGMII_BASE,
+                                &s->cfm_sgmii);
+
+    memory_region_init_io(&s->bc_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+                          "mchp.pfsoc.ioscb.bc_sgmii", IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_BC_SGMII_BASE,
+                                &s->bc_sgmii);
+
+    memory_region_init_io(&s->io_calib_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops,
+                          s, "mchp.pfsoc.ioscb.io_calib_sgmii",
+                          IOSCB_SUBMOD_REG_SIZE);
+    memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_SGMII_BASE,
+                                &s->io_calib_sgmii);
+}
+
+static void mchp_pfsoc_ioscb_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->desc = "Microchip PolarFire SoC IOSCB";
+    dc->realize = mchp_pfsoc_ioscb_realize;
+}
+
+static const TypeInfo mchp_pfsoc_ioscb_info = {
+    .name          = TYPE_MCHP_PFSOC_IOSCB,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(MchpPfSoCIoscbState),
+    .class_init    = mchp_pfsoc_ioscb_class_init,
+};
+
+static void mchp_pfsoc_ioscb_register_types(void)
+{
+    type_register_static(&mchp_pfsoc_ioscb_info);
+}
+
+type_init(mchp_pfsoc_ioscb_register_types)
diff --git a/hw/misc/meson.build b/hw/misc/meson.build
index 2d79a657e0..6d3c1a3455 100644
--- a/hw/misc/meson.build
+++ b/hw/misc/meson.build
@@ -23,6 +23,7 @@  softmmu_ss.add(when: 'CONFIG_MOS6522', if_true: files('mos6522.c'))
 
 # RISC-V devices
 softmmu_ss.add(when: 'CONFIG_MCHP_PFSOC_DMC', if_true: files('mchp_pfsoc_dmc.c'))
+softmmu_ss.add(when: 'CONFIG_MCHP_PFSOC_IOSCB', if_true: files('mchp_pfsoc_ioscb.c'))
 softmmu_ss.add(when: 'CONFIG_SIFIVE_TEST', if_true: files('sifive_test.c'))
 softmmu_ss.add(when: 'CONFIG_SIFIVE_E_PRCI', if_true: files('sifive_e_prci.c'))
 softmmu_ss.add(when: 'CONFIG_SIFIVE_U_OTP', if_true: files('sifive_u_otp.c'))
diff --git a/include/hw/misc/mchp_pfsoc_ioscb.h b/include/hw/misc/mchp_pfsoc_ioscb.h
new file mode 100644
index 0000000000..9235523e33
--- /dev/null
+++ b/include/hw/misc/mchp_pfsoc_ioscb.h
@@ -0,0 +1,50 @@ 
+/*
+ * Microchip PolarFire SoC IOSCB module emulation
+ *
+ * Copyright (c) 2020 Wind River Systems, Inc.
+ *
+ * Author:
+ *   Bin Meng <bin.meng@windriver.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MCHP_PFSOC_IOSCB_H
+#define MCHP_PFSOC_IOSCB_H
+
+typedef struct MchpPfSoCIoscbState {
+    SysBusDevice parent;
+    MemoryRegion container;
+    MemoryRegion lane01;
+    MemoryRegion lane23;
+    MemoryRegion ctrl;
+    MemoryRegion cfg;
+    MemoryRegion pll_mss;
+    MemoryRegion cfm_mss;
+    MemoryRegion pll_ddr;
+    MemoryRegion bc_ddr;
+    MemoryRegion io_calib_ddr;
+    MemoryRegion pll_sgmii;
+    MemoryRegion dll_sgmii;
+    MemoryRegion cfm_sgmii;
+    MemoryRegion bc_sgmii;
+    MemoryRegion io_calib_sgmii;
+} MchpPfSoCIoscbState;
+
+#define TYPE_MCHP_PFSOC_IOSCB "mchp.pfsoc.ioscb"
+
+#define MCHP_PFSOC_IOSCB(obj) \
+    OBJECT_CHECK(MchpPfSoCIoscbState, (obj), TYPE_MCHP_PFSOC_IOSCB)
+
+#endif /* MCHP_PFSOC_IOSCB_H */