| Message ID | 1566537069-22741-20-git-send-email-bmeng.cn@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | riscv: sifive_u: Improve the emulation fidelity of sifive_u machine | expand |
On Thu, Aug 22, 2019 at 10:21 PM Bin Meng <bmeng.cn@gmail.com> wrote: > > This adds a simple PRCI model for FU540 (sifive_u). It has different > register layout from the existing PRCI model for FE310 (sifive_e). > > Signed-off-by: Bin Meng <bmeng.cn@gmail.com> > > --- > > Changes in v5: > - change to use defines instead of enums > - change to use qemu_log_mask(LOG_GUEST_ERROR,...) in sifive_u_prci > - creating a 32-bit val variable and using that instead of casting > everywhere in sifive_u_prci_write() > - move all register initialization to sifive_u_prci_reset() function > - drop sifive_u_prci_create() > - s/codes that worked/code that works/g > > Changes in v4: > - prefix all macros/variables/functions with SIFIVE_U/sifive_u > in the sifive_u_prci driver > > Changes in v3: None > Changes in v2: None > > hw/riscv/Makefile.objs | 1 + > hw/riscv/sifive_u_prci.c | 171 +++++++++++++++++++++++++++++++++++++++ > include/hw/riscv/sifive_u_prci.h | 81 +++++++++++++++++++ > 3 files changed, 253 insertions(+) > create mode 100644 hw/riscv/sifive_u_prci.c > create mode 100644 include/hw/riscv/sifive_u_prci.h > > diff --git a/hw/riscv/Makefile.objs b/hw/riscv/Makefile.objs > index c859697..b95bbd5 100644 > --- a/hw/riscv/Makefile.objs > +++ b/hw/riscv/Makefile.objs > @@ -8,6 +8,7 @@ obj-$(CONFIG_SIFIVE) += sifive_gpio.o > obj-$(CONFIG_SIFIVE) += sifive_plic.o > obj-$(CONFIG_SIFIVE) += sifive_test.o > obj-$(CONFIG_SIFIVE_U) += sifive_u.o > +obj-$(CONFIG_SIFIVE_U) += sifive_u_prci.o > obj-$(CONFIG_SIFIVE) += sifive_uart.o > obj-$(CONFIG_SPIKE) += spike.o > obj-$(CONFIG_RISCV_VIRT) += virt.o > diff --git a/hw/riscv/sifive_u_prci.c b/hw/riscv/sifive_u_prci.c > new file mode 100644 > index 0000000..c6438fb > --- /dev/null > +++ b/hw/riscv/sifive_u_prci.c > @@ -0,0 +1,171 @@ > +/* > + * QEMU SiFive U PRCI (Power, Reset, Clock, Interrupt) > + * > + * Copyright (c) 2019 Bin Meng <bmeng.cn@gmail.com> > + * > + * Simple model of the PRCI to emulate register reads made by the SDK BSP > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2 or later, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope 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 "hw/sysbus.h" > +#include "qemu/log.h" > +#include "qemu/module.h" > +#include "hw/riscv/sifive_u_prci.h" > + > +static uint64_t sifive_u_prci_read(void *opaque, hwaddr addr, unsigned int size) > +{ > + SiFiveUPRCIState *s = opaque; > + > + switch (addr) { > + case SIFIVE_U_PRCI_HFXOSCCFG: > + return s->hfxosccfg; > + case SIFIVE_U_PRCI_COREPLLCFG0: > + return s->corepllcfg0; > + case SIFIVE_U_PRCI_DDRPLLCFG0: > + return s->ddrpllcfg0; > + case SIFIVE_U_PRCI_DDRPLLCFG1: > + return s->ddrpllcfg1; > + case SIFIVE_U_PRCI_GEMGXLPLLCFG0: > + return s->gemgxlpllcfg0; > + case SIFIVE_U_PRCI_GEMGXLPLLCFG1: > + return s->gemgxlpllcfg1; > + case SIFIVE_U_PRCI_CORECLKSEL: > + return s->coreclksel; > + case SIFIVE_U_PRCI_DEVICESRESET: > + return s->devicesreset; > + case SIFIVE_U_PRCI_CLKMUXSTATUS: > + return s->clkmuxstatus; > + } > + > + qemu_log_mask(LOG_GUEST_ERROR, "%s: read: addr=0x%x\n", > + __func__, (int)addr); > + > + return 0; > +} > + > +static void sifive_u_prci_write(void *opaque, hwaddr addr, > + uint64_t val64, unsigned int size) > +{ > + SiFiveUPRCIState *s = opaque; > + uint32_t val32 = (uint32_t)val64; > + > + switch (addr) { > + case SIFIVE_U_PRCI_HFXOSCCFG: > + s->hfxosccfg = val32; > + /* OSC stays ready */ > + s->hfxosccfg |= SIFIVE_U_PRCI_HFXOSCCFG_RDY; > + break; > + case SIFIVE_U_PRCI_COREPLLCFG0: > + s->corepllcfg0 = val32; > + /* internal feedback */ > + s->corepllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_FSE; > + /* PLL stays locked */ > + s->corepllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_LOCK; > + break; > + case SIFIVE_U_PRCI_DDRPLLCFG0: > + s->ddrpllcfg0 = val32; > + /* internal feedback */ > + s->ddrpllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_FSE; > + /* PLL stays locked */ > + s->ddrpllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_LOCK; > + break; > + case SIFIVE_U_PRCI_DDRPLLCFG1: > + s->ddrpllcfg1 = val32; > + break; > + case SIFIVE_U_PRCI_GEMGXLPLLCFG0: > + s->gemgxlpllcfg0 = val32; > + /* internal feedback */ > + s->gemgxlpllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_FSE; > + /* PLL stays locked */ This line seems to be incorrectly indented. > + s->gemgxlpllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_LOCK; > + break; > + case SIFIVE_U_PRCI_GEMGXLPLLCFG1: > + s->gemgxlpllcfg1 = val32; > + break; > + case SIFIVE_U_PRCI_CORECLKSEL: > + s->coreclksel = val32; > + break; > + case SIFIVE_U_PRCI_DEVICESRESET: > + s->devicesreset = val32; > + break; > + case SIFIVE_U_PRCI_CLKMUXSTATUS: > + s->clkmuxstatus = val32; > + break; > + default: > + qemu_log_mask(LOG_GUEST_ERROR, "%s: bad write: addr=0x%x v=0x%x\n", > + __func__, (int)addr, (int)val64); > + } > +} > + > +static const MemoryRegionOps sifive_u_prci_ops = { > + .read = sifive_u_prci_read, > + .write = sifive_u_prci_write, > + .endianness = DEVICE_NATIVE_ENDIAN, > + .valid = { > + .min_access_size = 4, > + .max_access_size = 4 > + } > +}; > + > +static void sifive_u_prci_realize(DeviceState *dev, Error **errp) > +{ > + SiFiveUPRCIState *s = SIFIVE_U_PRCI(dev); > + > + memory_region_init_io(&s->mmio, OBJECT(dev), &sifive_u_prci_ops, s, > + TYPE_SIFIVE_U_PRCI, SIFIVE_U_PRCI_REG_SIZE); > + sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mmio); > +} > + > +static void sifive_u_prci_reset(DeviceState *dev) > +{ > + SiFiveUPRCIState *s = SIFIVE_U_PRCI(dev); > + > + /* Initialize register to power-on-reset values */ > + s->hfxosccfg = (SIFIVE_U_PRCI_HFXOSCCFG_RDY | SIFIVE_U_PRCI_HFXOSCCFG_EN); > + s->corepllcfg0 = (SIFIVE_U_PRCI_PLLCFG0_DIVR | SIFIVE_U_PRCI_PLLCFG0_DIVF | > + SIFIVE_U_PRCI_PLLCFG0_DIVQ | SIFIVE_U_PRCI_PLLCFG0_FSE | > + SIFIVE_U_PRCI_PLLCFG0_LOCK); > + s->ddrpllcfg0 = (SIFIVE_U_PRCI_PLLCFG0_DIVR | SIFIVE_U_PRCI_PLLCFG0_DIVF | > + SIFIVE_U_PRCI_PLLCFG0_DIVQ | SIFIVE_U_PRCI_PLLCFG0_FSE | > + SIFIVE_U_PRCI_PLLCFG0_LOCK); > + s->gemgxlpllcfg0 = (SIFIVE_U_PRCI_PLLCFG0_DIVR | > + SIFIVE_U_PRCI_PLLCFG0_DIVF | > + SIFIVE_U_PRCI_PLLCFG0_DIVQ | > + SIFIVE_U_PRCI_PLLCFG0_FSE | > + SIFIVE_U_PRCI_PLLCFG0_LOCK); You don't need brackets around these. Besides the nits: Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Alistair > + s->coreclksel = SIFIVE_U_PRCI_CORECLKSEL_HFCLK; > +} > + > +static void sifive_u_prci_class_init(ObjectClass *klass, void *data) > +{ > + DeviceClass *dc = DEVICE_CLASS(klass); > + > + dc->realize = sifive_u_prci_realize; > + dc->reset = sifive_u_prci_reset; > +} > + > +static const TypeInfo sifive_u_prci_info = { > + .name = TYPE_SIFIVE_U_PRCI, > + .parent = TYPE_SYS_BUS_DEVICE, > + .instance_size = sizeof(SiFiveUPRCIState), > + .class_init = sifive_u_prci_class_init, > +}; > + > +static void sifive_u_prci_register_types(void) > +{ > + type_register_static(&sifive_u_prci_info); > +} > + > +type_init(sifive_u_prci_register_types) > diff --git a/include/hw/riscv/sifive_u_prci.h b/include/hw/riscv/sifive_u_prci.h > new file mode 100644 > index 0000000..60a2eab > --- /dev/null > +++ b/include/hw/riscv/sifive_u_prci.h > @@ -0,0 +1,81 @@ > +/* > + * QEMU SiFive U PRCI (Power, Reset, Clock, Interrupt) interface > + * > + * Copyright (c) 2019 Bin Meng <bmeng.cn@gmail.com> > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2 or later, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope 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 HW_SIFIVE_U_PRCI_H > +#define HW_SIFIVE_U_PRCI_H > + > +#define SIFIVE_U_PRCI_HFXOSCCFG 0x00 > +#define SIFIVE_U_PRCI_COREPLLCFG0 0x04 > +#define SIFIVE_U_PRCI_DDRPLLCFG0 0x0C > +#define SIFIVE_U_PRCI_DDRPLLCFG1 0x10 > +#define SIFIVE_U_PRCI_GEMGXLPLLCFG0 0x1C > +#define SIFIVE_U_PRCI_GEMGXLPLLCFG1 0x20 > +#define SIFIVE_U_PRCI_CORECLKSEL 0x24 > +#define SIFIVE_U_PRCI_DEVICESRESET 0x28 > +#define SIFIVE_U_PRCI_CLKMUXSTATUS 0x2C > + > +/* > + * Current FU540-C000 manual says ready bit is at bit 29, but > + * freedom-u540-c000-bootloader codes (ux00prci.h) says it is at bit 31. > + * We have to trust the actual code that works. > + * > + * see https://github.com/sifive/freedom-u540-c000-bootloader > + */ > + > +#define SIFIVE_U_PRCI_HFXOSCCFG_EN (1 << 30) > +#define SIFIVE_U_PRCI_HFXOSCCFG_RDY (1 << 31) > + > +/* xxxPLLCFG0 register bits */ > +#define SIFIVE_U_PRCI_PLLCFG0_DIVR (1 << 0) > +#define SIFIVE_U_PRCI_PLLCFG0_DIVF (31 << 6) > +#define SIFIVE_U_PRCI_PLLCFG0_DIVQ (3 << 15) > +#define SIFIVE_U_PRCI_PLLCFG0_FSE (1 << 25) > +#define SIFIVE_U_PRCI_PLLCFG0_LOCK (1 << 31) > + > +/* xxxPLLCFG1 register bits */ > +#define SIFIVE_U_PRCI_PLLCFG1_CKE (1 << 24) > + > +/* coreclksel register bits */ > +#define SIFIVE_U_PRCI_CORECLKSEL_HFCLK (1 << 0) > + > + > +#define SIFIVE_U_PRCI_REG_SIZE 0x1000 > + > +#define TYPE_SIFIVE_U_PRCI "riscv.sifive.u.prci" > + > +#define SIFIVE_U_PRCI(obj) \ > + OBJECT_CHECK(SiFiveUPRCIState, (obj), TYPE_SIFIVE_U_PRCI) > + > +typedef struct SiFiveUPRCIState { > + /*< private >*/ > + SysBusDevice parent_obj; > + > + /*< public >*/ > + MemoryRegion mmio; > + uint32_t hfxosccfg; > + uint32_t corepllcfg0; > + uint32_t ddrpllcfg0; > + uint32_t ddrpllcfg1; > + uint32_t gemgxlpllcfg0; > + uint32_t gemgxlpllcfg1; > + uint32_t coreclksel; > + uint32_t devicesreset; > + uint32_t clkmuxstatus; > +} SiFiveUPRCIState; > + > +#endif /* HW_SIFIVE_U_PRCI_H */ > -- > 2.7.4 > >
diff --git a/hw/riscv/Makefile.objs b/hw/riscv/Makefile.objs index c859697..b95bbd5 100644 --- a/hw/riscv/Makefile.objs +++ b/hw/riscv/Makefile.objs @@ -8,6 +8,7 @@ obj-$(CONFIG_SIFIVE) += sifive_gpio.o obj-$(CONFIG_SIFIVE) += sifive_plic.o obj-$(CONFIG_SIFIVE) += sifive_test.o obj-$(CONFIG_SIFIVE_U) += sifive_u.o +obj-$(CONFIG_SIFIVE_U) += sifive_u_prci.o obj-$(CONFIG_SIFIVE) += sifive_uart.o obj-$(CONFIG_SPIKE) += spike.o obj-$(CONFIG_RISCV_VIRT) += virt.o diff --git a/hw/riscv/sifive_u_prci.c b/hw/riscv/sifive_u_prci.c new file mode 100644 index 0000000..c6438fb --- /dev/null +++ b/hw/riscv/sifive_u_prci.c @@ -0,0 +1,171 @@ +/* + * QEMU SiFive U PRCI (Power, Reset, Clock, Interrupt) + * + * Copyright (c) 2019 Bin Meng <bmeng.cn@gmail.com> + * + * Simple model of the PRCI to emulate register reads made by the SDK BSP + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 "hw/sysbus.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "hw/riscv/sifive_u_prci.h" + +static uint64_t sifive_u_prci_read(void *opaque, hwaddr addr, unsigned int size) +{ + SiFiveUPRCIState *s = opaque; + + switch (addr) { + case SIFIVE_U_PRCI_HFXOSCCFG: + return s->hfxosccfg; + case SIFIVE_U_PRCI_COREPLLCFG0: + return s->corepllcfg0; + case SIFIVE_U_PRCI_DDRPLLCFG0: + return s->ddrpllcfg0; + case SIFIVE_U_PRCI_DDRPLLCFG1: + return s->ddrpllcfg1; + case SIFIVE_U_PRCI_GEMGXLPLLCFG0: + return s->gemgxlpllcfg0; + case SIFIVE_U_PRCI_GEMGXLPLLCFG1: + return s->gemgxlpllcfg1; + case SIFIVE_U_PRCI_CORECLKSEL: + return s->coreclksel; + case SIFIVE_U_PRCI_DEVICESRESET: + return s->devicesreset; + case SIFIVE_U_PRCI_CLKMUXSTATUS: + return s->clkmuxstatus; + } + + qemu_log_mask(LOG_GUEST_ERROR, "%s: read: addr=0x%x\n", + __func__, (int)addr); + + return 0; +} + +static void sifive_u_prci_write(void *opaque, hwaddr addr, + uint64_t val64, unsigned int size) +{ + SiFiveUPRCIState *s = opaque; + uint32_t val32 = (uint32_t)val64; + + switch (addr) { + case SIFIVE_U_PRCI_HFXOSCCFG: + s->hfxosccfg = val32; + /* OSC stays ready */ + s->hfxosccfg |= SIFIVE_U_PRCI_HFXOSCCFG_RDY; + break; + case SIFIVE_U_PRCI_COREPLLCFG0: + s->corepllcfg0 = val32; + /* internal feedback */ + s->corepllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_FSE; + /* PLL stays locked */ + s->corepllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_LOCK; + break; + case SIFIVE_U_PRCI_DDRPLLCFG0: + s->ddrpllcfg0 = val32; + /* internal feedback */ + s->ddrpllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_FSE; + /* PLL stays locked */ + s->ddrpllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_LOCK; + break; + case SIFIVE_U_PRCI_DDRPLLCFG1: + s->ddrpllcfg1 = val32; + break; + case SIFIVE_U_PRCI_GEMGXLPLLCFG0: + s->gemgxlpllcfg0 = val32; + /* internal feedback */ + s->gemgxlpllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_FSE; + /* PLL stays locked */ + s->gemgxlpllcfg0 |= SIFIVE_U_PRCI_PLLCFG0_LOCK; + break; + case SIFIVE_U_PRCI_GEMGXLPLLCFG1: + s->gemgxlpllcfg1 = val32; + break; + case SIFIVE_U_PRCI_CORECLKSEL: + s->coreclksel = val32; + break; + case SIFIVE_U_PRCI_DEVICESRESET: + s->devicesreset = val32; + break; + case SIFIVE_U_PRCI_CLKMUXSTATUS: + s->clkmuxstatus = val32; + break; + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: bad write: addr=0x%x v=0x%x\n", + __func__, (int)addr, (int)val64); + } +} + +static const MemoryRegionOps sifive_u_prci_ops = { + .read = sifive_u_prci_read, + .write = sifive_u_prci_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 4 + } +}; + +static void sifive_u_prci_realize(DeviceState *dev, Error **errp) +{ + SiFiveUPRCIState *s = SIFIVE_U_PRCI(dev); + + memory_region_init_io(&s->mmio, OBJECT(dev), &sifive_u_prci_ops, s, + TYPE_SIFIVE_U_PRCI, SIFIVE_U_PRCI_REG_SIZE); + sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mmio); +} + +static void sifive_u_prci_reset(DeviceState *dev) +{ + SiFiveUPRCIState *s = SIFIVE_U_PRCI(dev); + + /* Initialize register to power-on-reset values */ + s->hfxosccfg = (SIFIVE_U_PRCI_HFXOSCCFG_RDY | SIFIVE_U_PRCI_HFXOSCCFG_EN); + s->corepllcfg0 = (SIFIVE_U_PRCI_PLLCFG0_DIVR | SIFIVE_U_PRCI_PLLCFG0_DIVF | + SIFIVE_U_PRCI_PLLCFG0_DIVQ | SIFIVE_U_PRCI_PLLCFG0_FSE | + SIFIVE_U_PRCI_PLLCFG0_LOCK); + s->ddrpllcfg0 = (SIFIVE_U_PRCI_PLLCFG0_DIVR | SIFIVE_U_PRCI_PLLCFG0_DIVF | + SIFIVE_U_PRCI_PLLCFG0_DIVQ | SIFIVE_U_PRCI_PLLCFG0_FSE | + SIFIVE_U_PRCI_PLLCFG0_LOCK); + s->gemgxlpllcfg0 = (SIFIVE_U_PRCI_PLLCFG0_DIVR | + SIFIVE_U_PRCI_PLLCFG0_DIVF | + SIFIVE_U_PRCI_PLLCFG0_DIVQ | + SIFIVE_U_PRCI_PLLCFG0_FSE | + SIFIVE_U_PRCI_PLLCFG0_LOCK); + s->coreclksel = SIFIVE_U_PRCI_CORECLKSEL_HFCLK; +} + +static void sifive_u_prci_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = sifive_u_prci_realize; + dc->reset = sifive_u_prci_reset; +} + +static const TypeInfo sifive_u_prci_info = { + .name = TYPE_SIFIVE_U_PRCI, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(SiFiveUPRCIState), + .class_init = sifive_u_prci_class_init, +}; + +static void sifive_u_prci_register_types(void) +{ + type_register_static(&sifive_u_prci_info); +} + +type_init(sifive_u_prci_register_types) diff --git a/include/hw/riscv/sifive_u_prci.h b/include/hw/riscv/sifive_u_prci.h new file mode 100644 index 0000000..60a2eab --- /dev/null +++ b/include/hw/riscv/sifive_u_prci.h @@ -0,0 +1,81 @@ +/* + * QEMU SiFive U PRCI (Power, Reset, Clock, Interrupt) interface + * + * Copyright (c) 2019 Bin Meng <bmeng.cn@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 HW_SIFIVE_U_PRCI_H +#define HW_SIFIVE_U_PRCI_H + +#define SIFIVE_U_PRCI_HFXOSCCFG 0x00 +#define SIFIVE_U_PRCI_COREPLLCFG0 0x04 +#define SIFIVE_U_PRCI_DDRPLLCFG0 0x0C +#define SIFIVE_U_PRCI_DDRPLLCFG1 0x10 +#define SIFIVE_U_PRCI_GEMGXLPLLCFG0 0x1C +#define SIFIVE_U_PRCI_GEMGXLPLLCFG1 0x20 +#define SIFIVE_U_PRCI_CORECLKSEL 0x24 +#define SIFIVE_U_PRCI_DEVICESRESET 0x28 +#define SIFIVE_U_PRCI_CLKMUXSTATUS 0x2C + +/* + * Current FU540-C000 manual says ready bit is at bit 29, but + * freedom-u540-c000-bootloader codes (ux00prci.h) says it is at bit 31. + * We have to trust the actual code that works. + * + * see https://github.com/sifive/freedom-u540-c000-bootloader + */ + +#define SIFIVE_U_PRCI_HFXOSCCFG_EN (1 << 30) +#define SIFIVE_U_PRCI_HFXOSCCFG_RDY (1 << 31) + +/* xxxPLLCFG0 register bits */ +#define SIFIVE_U_PRCI_PLLCFG0_DIVR (1 << 0) +#define SIFIVE_U_PRCI_PLLCFG0_DIVF (31 << 6) +#define SIFIVE_U_PRCI_PLLCFG0_DIVQ (3 << 15) +#define SIFIVE_U_PRCI_PLLCFG0_FSE (1 << 25) +#define SIFIVE_U_PRCI_PLLCFG0_LOCK (1 << 31) + +/* xxxPLLCFG1 register bits */ +#define SIFIVE_U_PRCI_PLLCFG1_CKE (1 << 24) + +/* coreclksel register bits */ +#define SIFIVE_U_PRCI_CORECLKSEL_HFCLK (1 << 0) + + +#define SIFIVE_U_PRCI_REG_SIZE 0x1000 + +#define TYPE_SIFIVE_U_PRCI "riscv.sifive.u.prci" + +#define SIFIVE_U_PRCI(obj) \ + OBJECT_CHECK(SiFiveUPRCIState, (obj), TYPE_SIFIVE_U_PRCI) + +typedef struct SiFiveUPRCIState { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion mmio; + uint32_t hfxosccfg; + uint32_t corepllcfg0; + uint32_t ddrpllcfg0; + uint32_t ddrpllcfg1; + uint32_t gemgxlpllcfg0; + uint32_t gemgxlpllcfg1; + uint32_t coreclksel; + uint32_t devicesreset; + uint32_t clkmuxstatus; +} SiFiveUPRCIState; + +#endif /* HW_SIFIVE_U_PRCI_H */
This adds a simple PRCI model for FU540 (sifive_u). It has different register layout from the existing PRCI model for FE310 (sifive_e). Signed-off-by: Bin Meng <bmeng.cn@gmail.com> --- Changes in v5: - change to use defines instead of enums - change to use qemu_log_mask(LOG_GUEST_ERROR,...) in sifive_u_prci - creating a 32-bit val variable and using that instead of casting everywhere in sifive_u_prci_write() - move all register initialization to sifive_u_prci_reset() function - drop sifive_u_prci_create() - s/codes that worked/code that works/g Changes in v4: - prefix all macros/variables/functions with SIFIVE_U/sifive_u in the sifive_u_prci driver Changes in v3: None Changes in v2: None hw/riscv/Makefile.objs | 1 + hw/riscv/sifive_u_prci.c | 171 +++++++++++++++++++++++++++++++++++++++ include/hw/riscv/sifive_u_prci.h | 81 +++++++++++++++++++ 3 files changed, 253 insertions(+) create mode 100644 hw/riscv/sifive_u_prci.c create mode 100644 include/hw/riscv/sifive_u_prci.h