/* * Shakti C-class SoC emulation * * Copyright (c) 2021 Vijai Kumar K * * 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 "hw/boards.h" #include "hw/riscv/shakti_c.h" #include "qapi/error.h" #include "hw/intc/sifive_plic.h" #include "hw/intc/riscv_aclint.h" #include "sysemu/sysemu.h" #include "hw/qdev-properties.h" #include "exec/address-spaces.h" #include "hw/riscv/boot.h" static const struct MemmapEntry { hwaddr base; hwaddr size; } shakti_c_memmap[] = { [SHAKTI_C_ROM] = { 0x00001000, 0x2000 }, [SHAKTI_C_RAM] = { 0x80000000, 0x0 }, [SHAKTI_C_UART] = { 0x00011300, 0x00040 }, [SHAKTI_C_GPIO] = { 0x020d0000, 0x00100 }, [SHAKTI_C_PLIC] = { 0x0c000000, 0x20000 }, [SHAKTI_C_CLINT] = { 0x02000000, 0xc0000 }, [SHAKTI_C_I2C] = { 0x20c00000, 0x00100 }, }; static void shakti_c_machine_state_init(MachineState *mstate) { ShaktiCMachineState *sms = RISCV_SHAKTI_MACHINE(mstate); MemoryRegion *system_memory = get_system_memory(); MemoryRegion *main_mem = g_new(MemoryRegion, 1); /* Allow only Shakti C CPU for this platform */ if (strcmp(mstate->cpu_type, TYPE_RISCV_CPU_SHAKTI_C) != 0) { error_report("This board can only be used with Shakti C CPU"); exit(1); } /* Initialize SoC */ object_initialize_child(OBJECT(mstate), "soc", &sms->soc, TYPE_RISCV_SHAKTI_SOC); qdev_realize(DEVICE(&sms->soc), NULL, &error_abort); /* register RAM */ memory_region_init_ram(main_mem, NULL, "riscv.shakti.c.ram", mstate->ram_size, &error_fatal); memory_region_add_subregion(system_memory, shakti_c_memmap[SHAKTI_C_RAM].base, main_mem); /* ROM reset vector */ riscv_setup_rom_reset_vec(mstate, &sms->soc.cpus, shakti_c_memmap[SHAKTI_C_RAM].base, shakti_c_memmap[SHAKTI_C_ROM].base, shakti_c_memmap[SHAKTI_C_ROM].size, 0, 0, NULL); if (mstate->firmware) { riscv_load_firmware(mstate->firmware, shakti_c_memmap[SHAKTI_C_RAM].base, NULL); } } static void shakti_c_machine_instance_init(Object *obj) { } static void shakti_c_machine_class_init(ObjectClass *klass, void *data) { MachineClass *mc = MACHINE_CLASS(klass); mc->desc = "RISC-V Board compatible with Shakti SDK"; mc->init = shakti_c_machine_state_init; mc->default_cpu_type = TYPE_RISCV_CPU_SHAKTI_C; } static const TypeInfo shakti_c_machine_type_info = { .name = TYPE_RISCV_SHAKTI_MACHINE, .parent = TYPE_MACHINE, .class_init = shakti_c_machine_class_init, .instance_init = shakti_c_machine_instance_init, .instance_size = sizeof(ShaktiCMachineState), }; static void shakti_c_machine_type_info_register(void) { type_register_static(&shakti_c_machine_type_info); } type_init(shakti_c_machine_type_info_register) static void shakti_c_soc_state_realize(DeviceState *dev, Error **errp) { MachineState *ms = MACHINE(qdev_get_machine()); ShaktiCSoCState *sss = RISCV_SHAKTI_SOC(dev); MemoryRegion *system_memory = get_system_memory(); sysbus_realize(SYS_BUS_DEVICE(&sss->cpus), &error_abort); sss->plic = sifive_plic_create(shakti_c_memmap[SHAKTI_C_PLIC].base, (char *)SHAKTI_C_PLIC_HART_CONFIG, ms->smp.cpus, 0, SHAKTI_C_PLIC_NUM_SOURCES, SHAKTI_C_PLIC_NUM_PRIORITIES, SHAKTI_C_PLIC_PRIORITY_BASE, SHAKTI_C_PLIC_PENDING_BASE, SHAKTI_C_PLIC_ENABLE_BASE, SHAKTI_C_PLIC_ENABLE_STRIDE, SHAKTI_C_PLIC_CONTEXT_BASE, SHAKTI_C_PLIC_CONTEXT_STRIDE, shakti_c_memmap[SHAKTI_C_PLIC].size); riscv_aclint_swi_create(shakti_c_memmap[SHAKTI_C_CLINT].base, 0, 1, false); riscv_aclint_mtimer_create(shakti_c_memmap[SHAKTI_C_CLINT].base + RISCV_ACLINT_SWI_SIZE, RISCV_ACLINT_DEFAULT_MTIMER_SIZE, 0, 1, RISCV_ACLINT_DEFAULT_MTIMECMP, RISCV_ACLINT_DEFAULT_MTIME, RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, false); qdev_prop_set_chr(DEVICE(&(sss->uart)), "chardev", serial_hd(0)); if (!sysbus_realize(SYS_BUS_DEVICE(&sss->uart), errp)) { return; } sysbus_mmio_map(SYS_BUS_DEVICE(&sss->uart), 0, shakti_c_memmap[SHAKTI_C_UART].base); /* ROM */ memory_region_init_rom(&sss->rom, OBJECT(dev), "riscv.shakti.c.rom", shakti_c_memmap[SHAKTI_C_ROM].size, &error_fatal); memory_region_add_subregion(system_memory, shakti_c_memmap[SHAKTI_C_ROM].base, &sss->rom); } static void shakti_c_soc_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->realize = shakti_c_soc_state_realize; /* * Reasons: * - Creates CPUS in riscv_hart_realize(), and can create unintended * CPUs * - Uses serial_hds in realize function, thus can't be used twice */ dc->user_creatable = false; } static void shakti_c_soc_instance_init(Object *obj) { ShaktiCSoCState *sss = RISCV_SHAKTI_SOC(obj); object_initialize_child(obj, "cpus", &sss->cpus, TYPE_RISCV_HART_ARRAY); object_initialize_child(obj, "uart", &sss->uart, TYPE_SHAKTI_UART); /* * CPU type is fixed and we are not supporting passing from commandline yet. * So let it be in instance_init. When supported should use ms->cpu_type * instead of TYPE_RISCV_CPU_SHAKTI_C */ object_property_set_str(OBJECT(&sss->cpus), "cpu-type", TYPE_RISCV_CPU_SHAKTI_C, &error_abort); object_property_set_int(OBJECT(&sss->cpus), "num-harts", 1, &error_abort); } static const TypeInfo shakti_c_type_info = { .name = TYPE_RISCV_SHAKTI_SOC, .parent = TYPE_DEVICE, .class_init = shakti_c_soc_class_init, .instance_init = shakti_c_soc_instance_init, .instance_size = sizeof(ShaktiCSoCState), }; static void shakti_c_type_info_register(void) { type_register_static(&shakti_c_type_info); } type_init(shakti_c_type_info_register)