On Tue, Oct 27, 2020 at 7:56 AM Bin Meng <bmeng...@gmail.com> wrote: > > From: Bin Meng <bin.m...@windriver.com> > > This creates a minimum model for Microchip PolarFire SoC SYSREG > module. It only implements the ENVM_CR register to tell guest > software that eNVM is running at the configured divider rate. > > Signed-off-by: Bin Meng <bin.m...@windriver.com>
Reviewed-by: Alistair Francis <alistair.fran...@wdc.com> Alistair > --- > > MAINTAINERS | 2 + > hw/misc/Kconfig | 3 + > hw/misc/mchp_pfsoc_sysreg.c | 99 +++++++++++++++++++++++++++++ > hw/misc/meson.build | 1 + > include/hw/misc/mchp_pfsoc_sysreg.h | 39 ++++++++++++ > 5 files changed, 144 insertions(+) > create mode 100644 hw/misc/mchp_pfsoc_sysreg.c > create mode 100644 include/hw/misc/mchp_pfsoc_sysreg.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index ebbc62a62f..e82f2b35e8 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -1328,10 +1328,12 @@ 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: hw/misc/mchp_pfsoc_sysreg.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 > +F: include/hw/misc/mchp_pfsoc_sysreg.h > > RX Machines > ----------- > diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig > index 3db15e06b4..546e2fab9b 100644 > --- a/hw/misc/Kconfig > +++ b/hw/misc/Kconfig > @@ -140,6 +140,9 @@ config MCHP_PFSOC_DMC > config MCHP_PFSOC_IOSCB > bool > > +config MCHP_PFSOC_SYSREG > + bool > + > config SIFIVE_TEST > bool > > diff --git a/hw/misc/mchp_pfsoc_sysreg.c b/hw/misc/mchp_pfsoc_sysreg.c > new file mode 100644 > index 0000000000..248a313345 > --- /dev/null > +++ b/hw/misc/mchp_pfsoc_sysreg.c > @@ -0,0 +1,99 @@ > +/* > + * Microchip PolarFire SoC SYSREG module emulation > + * > + * Copyright (c) 2020 Wind River Systems, Inc. > + * > + * Author: > + * Bin Meng <bin.m...@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_sysreg.h" > + > +#define ENVM_CR 0xb8 > + > +static uint64_t mchp_pfsoc_sysreg_read(void *opaque, hwaddr offset, > + unsigned size) > +{ > + uint32_t val = 0; > + > + switch (offset) { > + case ENVM_CR: > + /* Indicate the eNVM is running at the configured divider rate */ > + val = BIT(6); > + 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 void mchp_pfsoc_sysreg_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_sysreg_ops = { > + .read = mchp_pfsoc_sysreg_read, > + .write = mchp_pfsoc_sysreg_write, > + .endianness = DEVICE_LITTLE_ENDIAN, > +}; > + > +static void mchp_pfsoc_sysreg_realize(DeviceState *dev, Error **errp) > +{ > + MchpPfSoCSysregState *s = MCHP_PFSOC_SYSREG(dev); > + > + memory_region_init_io(&s->sysreg, OBJECT(dev), > + &mchp_pfsoc_sysreg_ops, s, > + "mchp.pfsoc.sysreg", > + MCHP_PFSOC_SYSREG_REG_SIZE); > + sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->sysreg); > +} > + > +static void mchp_pfsoc_sysreg_class_init(ObjectClass *klass, void *data) > +{ > + DeviceClass *dc = DEVICE_CLASS(klass); > + > + dc->desc = "Microchip PolarFire SoC SYSREG module"; > + dc->realize = mchp_pfsoc_sysreg_realize; > +} > + > +static const TypeInfo mchp_pfsoc_sysreg_info = { > + .name = TYPE_MCHP_PFSOC_SYSREG, > + .parent = TYPE_SYS_BUS_DEVICE, > + .instance_size = sizeof(MchpPfSoCSysregState), > + .class_init = mchp_pfsoc_sysreg_class_init, > +}; > + > +static void mchp_pfsoc_sysreg_register_types(void) > +{ > + type_register_static(&mchp_pfsoc_sysreg_info); > +} > + > +type_init(mchp_pfsoc_sysreg_register_types) > diff --git a/hw/misc/meson.build b/hw/misc/meson.build > index 6d3c1a3455..8ed75254c4 100644 > --- a/hw/misc/meson.build > +++ b/hw/misc/meson.build > @@ -24,6 +24,7 @@ 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_MCHP_PFSOC_SYSREG', if_true: > files('mchp_pfsoc_sysreg.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_sysreg.h > b/include/hw/misc/mchp_pfsoc_sysreg.h > new file mode 100644 > index 0000000000..546ba68f6a > --- /dev/null > +++ b/include/hw/misc/mchp_pfsoc_sysreg.h > @@ -0,0 +1,39 @@ > +/* > + * Microchip PolarFire SoC SYSREG module emulation > + * > + * Copyright (c) 2020 Wind River Systems, Inc. > + * > + * Author: > + * Bin Meng <bin.m...@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_SYSREG_H > +#define MCHP_PFSOC_SYSREG_H > + > +#define MCHP_PFSOC_SYSREG_REG_SIZE 0x2000 > + > +typedef struct MchpPfSoCSysregState { > + SysBusDevice parent; > + MemoryRegion sysreg; > +} MchpPfSoCSysregState; > + > +#define TYPE_MCHP_PFSOC_SYSREG "mchp.pfsoc.sysreg" > + > +#define MCHP_PFSOC_SYSREG(obj) \ > + OBJECT_CHECK(MchpPfSoCSysregState, (obj), \ > + TYPE_MCHP_PFSOC_SYSREG) > + > +#endif /* MCHP_PFSOC_SYSREG_H */ > -- > 2.25.1 > >
