/* * QEMU RISC-V Board Compatible with SiFive Freedom E SDK * * Copyright (c) 2017 SiFive, Inc. * * Provides a board compatible with the SiFive Freedom E SDK: * * 0) UART * 1) CLINT (Core Level Interruptor) * 2) PLIC (Platform Level Interrupt Controller) * 3) PRCI (Power, Reset, Clock, Interrupt) * 4) Registers emulated as RAM: AON, GPIO, QSPI, PWM * 5) Flash memory emulated as RAM * * The Mask ROM reset vector jumps to the flash payload at 0x2040_0000. * The OTP ROM and Flash boot code will be emulated in a future version. * * 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 . */ #include "qemu/osdep.h" #include "qemu/log.h" #include "qemu/error-report.h" #include "qapi/error.h" #include "hw/hw.h" #include "hw/boards.h" #include "hw/loader.h" #include "hw/sysbus.h" #include "hw/char/serial.h" #include "target/riscv/cpu.h" #include "hw/riscv/riscv_hart.h" #include "hw/riscv/sifive_plic.h" #include "hw/riscv/sifive_clint.h" #include "hw/riscv/sifive_prci.h" #include "hw/riscv/sifive_uart.h" #include "hw/riscv/sifive_e.h" #include "hw/riscv/boot.h" #include "chardev/char.h" #include "sysemu/arch_init.h" #include "exec/address-spaces.h" static const struct MemmapEntry { hwaddr base; hwaddr size; } sifive_e_memmap[] = { [SIFIVE_E_DEBUG] = { 0x0, 0x100 }, [SIFIVE_E_MROM] = { 0x1000, 0x2000 }, [SIFIVE_E_OTP] = { 0x20000, 0x2000 }, [SIFIVE_E_CLINT] = { 0x2000000, 0x10000 }, [SIFIVE_E_PLIC] = { 0xc000000, 0x4000000 }, [SIFIVE_E_AON] = { 0x10000000, 0x8000 }, [SIFIVE_E_PRCI] = { 0x10008000, 0x8000 }, [SIFIVE_E_OTP_CTRL] = { 0x10010000, 0x1000 }, [SIFIVE_E_GPIO0] = { 0x10012000, 0x1000 }, [SIFIVE_E_UART0] = { 0x10013000, 0x1000 }, [SIFIVE_E_QSPI0] = { 0x10014000, 0x1000 }, [SIFIVE_E_PWM0] = { 0x10015000, 0x1000 }, [SIFIVE_E_UART1] = { 0x10023000, 0x1000 }, [SIFIVE_E_QSPI1] = { 0x10024000, 0x1000 }, [SIFIVE_E_PWM1] = { 0x10025000, 0x1000 }, [SIFIVE_E_QSPI2] = { 0x10034000, 0x1000 }, [SIFIVE_E_PWM2] = { 0x10035000, 0x1000 }, [SIFIVE_E_XIP] = { 0x20000000, 0x20000000 }, [SIFIVE_E_DTIM] = { 0x80000000, 0x4000 } }; static void sifive_mmio_emulate(MemoryRegion *parent, const char *name, uintptr_t offset, uintptr_t length) { MemoryRegion *mock_mmio = g_new(MemoryRegion, 1); memory_region_init_ram(mock_mmio, NULL, name, length, &error_fatal); memory_region_add_subregion(parent, offset, mock_mmio); } static void riscv_sifive_e_init(MachineState *machine) { const struct MemmapEntry *memmap = sifive_e_memmap; SiFiveEState *s = g_new0(SiFiveEState, 1); MemoryRegion *sys_mem = get_system_memory(); MemoryRegion *main_mem = g_new(MemoryRegion, 1); int i; /* Initialize SoC */ object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc), TYPE_RISCV_E_SOC, &error_abort, NULL); object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_abort); /* Data Tightly Integrated Memory */ memory_region_init_ram(main_mem, NULL, "riscv.sifive.e.ram", memmap[SIFIVE_E_DTIM].size, &error_fatal); memory_region_add_subregion(sys_mem, memmap[SIFIVE_E_DTIM].base, main_mem); /* Mask ROM reset vector */ uint32_t reset_vec[2] = { 0x204002b7, /* 0x1000: lui t0,0x20400 */ 0x00028067, /* 0x1004: jr t0 */ }; /* copy in the reset vector in little_endian byte order */ for (i = 0; i < sizeof(reset_vec) >> 2; i++) { reset_vec[i] = cpu_to_le32(reset_vec[i]); } rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec), memmap[SIFIVE_E_MROM].base, &address_space_memory); if (machine->kernel_filename) { riscv_load_kernel(machine->kernel_filename); } } static void riscv_sifive_e_soc_init(Object *obj) { SiFiveESoCState *s = RISCV_E_SOC(obj); object_initialize_child(obj, "cpus", &s->cpus, sizeof(s->cpus), TYPE_RISCV_HART_ARRAY, &error_abort, NULL); object_property_set_str(OBJECT(&s->cpus), SIFIVE_E_CPU, "cpu-type", &error_abort); object_property_set_int(OBJECT(&s->cpus), smp_cpus, "num-harts", &error_abort); sysbus_init_child_obj(obj, "riscv.sifive.e.gpio0", &s->gpio, sizeof(s->gpio), TYPE_SIFIVE_GPIO); } static void riscv_sifive_e_soc_realize(DeviceState *dev, Error **errp) { const struct MemmapEntry *memmap = sifive_e_memmap; Error *err = NULL; SiFiveESoCState *s = RISCV_E_SOC(dev); MemoryRegion *sys_mem = get_system_memory(); object_property_set_bool(OBJECT(&s->cpus), true, "realized", &error_abort); /* Mask ROM */ memory_region_init_rom(&s->mask_rom, NULL, "riscv.sifive.e.mrom", memmap[SIFIVE_E_MROM].size, &error_fatal); memory_region_add_subregion(sys_mem, memmap[SIFIVE_E_MROM].base, &s->mask_rom); /* MMIO */ s->plic = sifive_plic_create(memmap[SIFIVE_E_PLIC].base, (char *)SIFIVE_E_PLIC_HART_CONFIG, SIFIVE_E_PLIC_NUM_SOURCES, SIFIVE_E_PLIC_NUM_PRIORITIES, SIFIVE_E_PLIC_PRIORITY_BASE, SIFIVE_E_PLIC_PENDING_BASE, SIFIVE_E_PLIC_ENABLE_BASE, SIFIVE_E_PLIC_ENABLE_STRIDE, SIFIVE_E_PLIC_CONTEXT_BASE, SIFIVE_E_PLIC_CONTEXT_STRIDE, memmap[SIFIVE_E_PLIC].size); sifive_clint_create(memmap[SIFIVE_E_CLINT].base, memmap[SIFIVE_E_CLINT].size, smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE); sifive_mmio_emulate(sys_mem, "riscv.sifive.e.aon", memmap[SIFIVE_E_AON].base, memmap[SIFIVE_E_AON].size); sifive_prci_create(memmap[SIFIVE_E_PRCI].base); /* GPIO */ object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err); if (err) { error_propagate(errp, err); return; } /* Map GPIO registers */ sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpio), 0, memmap[SIFIVE_E_GPIO0].base); /* Pass all GPIOs to the SOC layer so they are available to the board */ qdev_pass_gpios(DEVICE(&s->gpio), dev, NULL); /* Connect GPIO interrupts to the PLIC */ for (int i = 0; i < 32; i++) { sysbus_connect_irq(SYS_BUS_DEVICE(&s->gpio), i, qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_E_GPIO0_IRQ0 + i)); } sifive_uart_create(sys_mem, memmap[SIFIVE_E_UART0].base, serial_hd(0), qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_E_UART0_IRQ)); sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi0", memmap[SIFIVE_E_QSPI0].base, memmap[SIFIVE_E_QSPI0].size); sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm0", memmap[SIFIVE_E_PWM0].base, memmap[SIFIVE_E_PWM0].size); sifive_uart_create(sys_mem, memmap[SIFIVE_E_UART1].base, serial_hd(1), qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_E_UART1_IRQ)); sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi1", memmap[SIFIVE_E_QSPI1].base, memmap[SIFIVE_E_QSPI1].size); sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm1", memmap[SIFIVE_E_PWM1].base, memmap[SIFIVE_E_PWM1].size); sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi2", memmap[SIFIVE_E_QSPI2].base, memmap[SIFIVE_E_QSPI2].size); sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm2", memmap[SIFIVE_E_PWM2].base, memmap[SIFIVE_E_PWM2].size); /* Flash memory */ memory_region_init_ram(&s->xip_mem, NULL, "riscv.sifive.e.xip", memmap[SIFIVE_E_XIP].size, &error_fatal); memory_region_set_readonly(&s->xip_mem, true); memory_region_add_subregion(sys_mem, memmap[SIFIVE_E_XIP].base, &s->xip_mem); } static void riscv_sifive_e_machine_init(MachineClass *mc) { mc->desc = "RISC-V Board compatible with SiFive E SDK"; mc->init = riscv_sifive_e_init; mc->max_cpus = 1; } DEFINE_MACHINE("sifive_e", riscv_sifive_e_machine_init) static void riscv_sifive_e_soc_class_init(ObjectClass *oc, void *data) { DeviceClass *dc = DEVICE_CLASS(oc); dc->realize = riscv_sifive_e_soc_realize; /* Reason: Uses serial_hds in realize function, thus can't be used twice */ dc->user_creatable = false; } static const TypeInfo riscv_sifive_e_soc_type_info = { .name = TYPE_RISCV_E_SOC, .parent = TYPE_DEVICE, .instance_size = sizeof(SiFiveESoCState), .instance_init = riscv_sifive_e_soc_init, .class_init = riscv_sifive_e_soc_class_init, }; static void riscv_sifive_e_soc_register_types(void) { type_register_static(&riscv_sifive_e_soc_type_info); } type_init(riscv_sifive_e_soc_register_types)