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[125.237.39.90]) by smtp.gmail.com with ESMTPSA id 75sm97691351pfo.103.2018.01.02.16.46.25 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 02 Jan 2018 16:46:27 -0800 (PST) From: Michael Clark To: qemu-devel@nongnu.org Date: Wed, 3 Jan 2018 13:44:07 +1300 Message-Id: <1514940265-18093-4-git-send-email-mjc@sifive.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1514940265-18093-1-git-send-email-mjc@sifive.com> References: <1514940265-18093-1-git-send-email-mjc@sifive.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c05::242 Subject: [Qemu-devel] [PATCH v1 03/21] RISC-V CPU Core Definition X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bastian Koppelmann , Michael Clark , Sagar Karandikar Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add CPU state header, CPU definitions and initialization routines Signed-off-by: Michael Clark --- target/riscv/cpu.c | 338 +++++++++++++++++++++++++++++++++++++++ target/riscv/cpu.h | 363 ++++++++++++++++++++++++++++++++++++++++++ target/riscv/cpu_bits.h | 411 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 1112 insertions(+) create mode 100644 target/riscv/cpu.c create mode 100644 target/riscv/cpu.h create mode 100644 target/riscv/cpu_bits.h diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c new file mode 100644 index 0000000..ee4c4c2 --- /dev/null +++ b/target/riscv/cpu.c @@ -0,0 +1,338 @@ +/* + * QEMU RISC-V CPU + * + * Author: Sagar Karandikar, sagark@eecs.berkeley.edu + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see + * + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "cpu.h" +#include "exec/exec-all.h" +#include "qapi/error.h" +#include "migration/vmstate.h" + +/* RISC-V CPU definitions */ + +typedef struct RISCVCPUInfo { + const char *name; + void (*initfn)(Object *obj); +} RISCVCPUInfo; + +#ifdef CONFIG_USER_ONLY +static void riscv_any_cpu_init(Object *obj) +{ + CPURISCVState *env = &RISCV_CPU(obj)->env; + env->misa = RVXLEN | RVI | RVM | RVA | RVF | RVD | RVC | RVU; + env->misa_mask = env->misa; + env->user_ver = USER_VERSION_2_02_0; + env->priv_ver = PRIV_VERSION_1_10_0; +} +#else +static void riscv_imafdcsu_priv1_9_cpu_init(Object *obj) +{ + CPURISCVState *env = &RISCV_CPU(obj)->env; + env->misa = RVXLEN | RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU; + env->misa_mask = env->misa; + env->user_ver = USER_VERSION_2_02_0; + env->priv_ver = PRIV_VERSION_1_09_1; +} + +static void riscv_imafdcsu_priv1_10_cpu_init(Object *obj) +{ + CPURISCVState *env = &RISCV_CPU(obj)->env; + env->misa = RVXLEN | RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU; + env->misa_mask = env->misa; + env->user_ver = USER_VERSION_2_02_0; + env->priv_ver = PRIV_VERSION_1_10_0; +} + +static void riscv_imacu_priv1_10_cpu_init(Object *obj) +{ + CPURISCVState *env = &RISCV_CPU(obj)->env; + env->misa = RVXLEN | RVI | RVM | RVA | RVC | RVU; + env->misa_mask = env->misa; + env->user_ver = USER_VERSION_2_02_0; + env->priv_ver = PRIV_VERSION_1_10_0; +} + +static void riscv_imac_priv1_10_cpu_init(Object *obj) +{ + CPURISCVState *env = &RISCV_CPU(obj)->env; + env->misa = RVXLEN | RVI | RVM | RVA | RVC; + env->misa_mask = env->misa; + env->user_ver = USER_VERSION_2_02_0; + env->priv_ver = PRIV_VERSION_1_10_0; +} +#endif + +static const RISCVCPUInfo riscv_cpus[] = { +#ifdef CONFIG_USER_ONLY + { TYPE_RISCV_CPU_ANY, riscv_any_cpu_init }, +#else + { TYPE_RISCV_CPU_IMAFDCSU_PRIV_1_09, riscv_imafdcsu_priv1_9_cpu_init }, + { TYPE_RISCV_CPU_IMAFDCSU_PRIV_1_10, riscv_imafdcsu_priv1_10_cpu_init }, + { TYPE_RISCV_CPU_IMACU_PRIV_1_10, riscv_imacu_priv1_10_cpu_init }, + { TYPE_RISCV_CPU_IMAC_PRIV_1_10, riscv_imac_priv1_10_cpu_init }, +#endif + { NULL, NULL } +}; + +static ObjectClass *riscv_cpu_class_by_name(const char *cpu_model) +{ + ObjectClass *oc; + char *typename; + char **cpuname; + + cpuname = g_strsplit(cpu_model, ",", 1); + typename = g_strdup_printf(RISCV_CPU_TYPE_NAME("%s"), cpuname[0]); + oc = object_class_by_name(typename); + g_strfreev(cpuname); + g_free(typename); + if (!oc || !object_class_dynamic_cast(oc, TYPE_RISCV_CPU) || + object_class_is_abstract(oc)) { + return NULL; + } + return oc; +} + +static inline void set_feature(CPURISCVState *env, int feature) +{ + env->features |= 1ULL << feature; +} + +static void riscv_cpu_set_pc(CPUState *cs, vaddr value) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; + env->pc = value; +} + +static void riscv_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; + env->pc = tb->pc; +} + +#ifdef CONFIG_USER_ONLY +static bool riscv_cpu_has_work(CPUState *cs) +{ + return 0; +} +#else +static bool riscv_cpu_has_work(CPUState *cs) +{ + return cs->interrupt_request & CPU_INTERRUPT_HARD; +} +#endif + +void restore_state_to_opc(CPURISCVState *env, TranslationBlock *tb, + target_ulong *data) +{ + env->pc = data[0]; +} + +static void riscv_cpu_reset(CPUState *cs) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu); + CPURISCVState *env = &cpu->env; + + mcc->parent_reset(cs); +#ifndef CONFIG_USER_ONLY + tlb_flush(cs); + env->priv = PRV_M; + env->mtvec = DEFAULT_MTVEC; +#endif + env->pc = DEFAULT_RSTVEC; + cs->exception_index = EXCP_NONE; + set_default_nan_mode(1, &env->fp_status); +} + +static void riscv_cpu_disas_set_info(CPUState *s, disassemble_info *info) +{ +#if defined(TARGET_RISCV32) + info->print_insn = print_insn_riscv32; +#elif defined(TARGET_RISCV64) + info->print_insn = print_insn_riscv64; +#endif +} + +static void riscv_cpu_realize(DeviceState *dev, Error **errp) +{ + CPUState *cs = CPU(dev); + RISCVCPU *cpu = RISCV_CPU(dev); + RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(dev); + CPURISCVState *env = &cpu->env; + Error *local_err = NULL; + + cpu_exec_realizefn(cs, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return; + } + + if (env->misa & RVM) { + set_feature(env, RISCV_FEATURE_RVM); + } + if (env->misa & RVA) { + set_feature(env, RISCV_FEATURE_RVA); + } + if (env->misa & RVF) { + set_feature(env, RISCV_FEATURE_RVF); + } + if (env->misa & RVD) { + set_feature(env, RISCV_FEATURE_RVD); + } + if (env->misa & RVC) { + set_feature(env, RISCV_FEATURE_RVC); + } + + qemu_init_vcpu(cs); + cpu_reset(cs); + + mcc->parent_realize(dev, errp); +} + +static void riscv_cpu_init(Object *obj) +{ + CPUState *cs = CPU(obj); + RISCVCPU *cpu = RISCV_CPU(obj); + + cs->env_ptr = &cpu->env; +} + +static const VMStateDescription vmstate_riscv_cpu = { + .name = "cpu", + .unmigratable = 1, +}; + +static void riscv_cpu_class_init(ObjectClass *c, void *data) +{ + RISCVCPUClass *mcc = RISCV_CPU_CLASS(c); + CPUClass *cc = CPU_CLASS(c); + DeviceClass *dc = DEVICE_CLASS(c); + + mcc->parent_realize = dc->realize; + dc->realize = riscv_cpu_realize; + + mcc->parent_reset = cc->reset; + cc->reset = riscv_cpu_reset; + + cc->class_by_name = riscv_cpu_class_by_name; + cc->has_work = riscv_cpu_has_work; + cc->do_interrupt = riscv_cpu_do_interrupt; + cc->cpu_exec_interrupt = riscv_cpu_exec_interrupt; + cc->dump_state = riscv_cpu_dump_state; + cc->set_pc = riscv_cpu_set_pc; + cc->synchronize_from_tb = riscv_cpu_synchronize_from_tb; + cc->gdb_read_register = riscv_cpu_gdb_read_register; + cc->gdb_write_register = riscv_cpu_gdb_write_register; + cc->gdb_num_core_regs = 65; + cc->gdb_stop_before_watchpoint = true; + cc->disas_set_info = riscv_cpu_disas_set_info; +#ifdef CONFIG_USER_ONLY + cc->handle_mmu_fault = riscv_cpu_handle_mmu_fault; +#else + cc->do_unassigned_access = riscv_cpu_unassigned_access; + cc->do_unaligned_access = riscv_cpu_do_unaligned_access; + cc->get_phys_page_debug = riscv_cpu_get_phys_page_debug; +#endif +#ifdef CONFIG_TCG + cc->tcg_initialize = riscv_translate_init; +#endif + /* For now, mark unmigratable: */ + cc->vmsd = &vmstate_riscv_cpu; +} + +static void cpu_register(const RISCVCPUInfo *info) +{ + TypeInfo type_info = { + .name = g_strdup(info->name), + .parent = TYPE_RISCV_CPU, + .instance_size = sizeof(RISCVCPU), + .instance_init = info->initfn, + }; + + type_register(&type_info); + g_free((void *)type_info.name); +} + +static const TypeInfo riscv_cpu_type_info = { + .name = TYPE_RISCV_CPU, + .parent = TYPE_CPU, + .instance_size = sizeof(RISCVCPU), + .instance_init = riscv_cpu_init, + .abstract = false, + .class_size = sizeof(RISCVCPUClass), + .class_init = riscv_cpu_class_init, +}; + +char *riscv_isa_string(RISCVCPU *cpu) +{ + size_t len = 5 + ctz32(cpu->env.misa); + char *isa_string = g_new(char, len); + isa_string[0] = '\0'; +#if defined(TARGET_RISCV32) + strncat(isa_string, "rv32", len); +#elif defined(TARGET_RISCV64) + strncat(isa_string, "rv64", len); +#endif + if (cpu->env.misa & RVI) { + strncat(isa_string, "i", len); + } + if (cpu->env.misa & RVM) { + strncat(isa_string, "m", len); + } + if (cpu->env.misa & RVA) { + strncat(isa_string, "a", len); + } + if (cpu->env.misa & RVF) { + strncat(isa_string, "f", len); + } + if (cpu->env.misa & RVD) { + strncat(isa_string, "d", len); + } + if (cpu->env.misa & RVC) { + strncat(isa_string, "c", len); + } + return isa_string; +} + +void riscv_cpu_list(FILE *f, fprintf_function cpu_fprintf) +{ + const RISCVCPUInfo *info = riscv_cpus; + + while (info->name) { + (*cpu_fprintf)(f, "%s\n", info->name); + info++; + } +} + +static void riscv_cpu_register_types(void) +{ + const RISCVCPUInfo *info = riscv_cpus; + + type_register_static(&riscv_cpu_type_info); + + while (info->name) { + cpu_register(info); + info++; + } +} + +type_init(riscv_cpu_register_types) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h new file mode 100644 index 0000000..0480127 --- /dev/null +++ b/target/riscv/cpu.h @@ -0,0 +1,363 @@ +#ifndef RISCV_CPU_H +#define RISCV_CPU_H + +/* QEMU addressing/paging config */ +#define TARGET_PAGE_BITS 12 /* 4 KiB Pages */ +#if defined(TARGET_RISCV64) +#define TARGET_LONG_BITS 64 +#define TARGET_PHYS_ADDR_SPACE_BITS 50 +#define TARGET_VIRT_ADDR_SPACE_BITS 39 +#elif defined(TARGET_RISCV32) +#define TARGET_LONG_BITS 32 +#define TARGET_PHYS_ADDR_SPACE_BITS 34 +#define TARGET_VIRT_ADDR_SPACE_BITS 32 +#endif + +#define TARGET_HAS_ICE 1 +#define ELF_MACHINE EM_RISCV +#define CPUArchState struct CPURISCVState + +#include "qemu-common.h" +#include "qom/cpu.h" +#include "exec/cpu-defs.h" +#include "fpu/softfloat.h" + +/* #define DEBUG_OP */ +/* #define RISCV_DEBUG_PRINT */ + +#define TYPE_RISCV_CPU "riscv" +#define TYPE_RISCV_CPU_ANY "riscv-any" +#define TYPE_RISCV_CPU_IMAFDCSU_PRIV_1_09 "riscv-imafdcsu-priv1.9" +#define TYPE_RISCV_CPU_IMAFDCSU_PRIV_1_10 "riscv-imafdcsu-priv1.10" +#define TYPE_RISCV_CPU_IMACU_PRIV_1_10 "riscv-imacu-priv1.10" +#define TYPE_RISCV_CPU_IMAC_PRIV_1_10 "riscv-imac-priv1.10" + +#define RISCV_CPU_TYPE_PREFIX TYPE_RISCV_CPU "-" +#define RISCV_CPU_TYPE_NAME(name) (RISCV_CPU_TYPE_PREFIX name) + +#if defined(TARGET_RISCV32) +#define RVXLEN ((target_ulong)1 << (TARGET_LONG_BITS - 2)) +#elif defined(TARGET_RISCV64) +#define RVXLEN ((target_ulong)2 << (TARGET_LONG_BITS - 2)) +#endif +#define RV(x) (1L << (x - 'A')) + +#define RVI RV('I') +#define RVM RV('M') +#define RVA RV('A') +#define RVF RV('F') +#define RVD RV('D') +#define RVC RV('C') +#define RVS RV('S') +#define RVU RV('U') + +#define USER_VERSION_2_02_0 0x00020200 +#define PRIV_VERSION_1_09_1 0x00010901 +#define PRIV_VERSION_1_10_0 0x00011000 + +/* RISCV Exception Codes */ +#define EXCP_NONE -1 /* not a real RISCV exception code */ +#define RISCV_EXCP_INST_ADDR_MIS 0x0 +#define RISCV_EXCP_INST_ACCESS_FAULT 0x1 +#define RISCV_EXCP_ILLEGAL_INST 0x2 +#define RISCV_EXCP_BREAKPOINT 0x3 +#define RISCV_EXCP_LOAD_ADDR_MIS 0x4 +#define RISCV_EXCP_LOAD_ACCESS_FAULT 0x5 +#define RISCV_EXCP_STORE_AMO_ADDR_MIS 0x6 +#define RISCV_EXCP_STORE_AMO_ACCESS_FAULT 0x7 +#define RISCV_EXCP_U_ECALL 0x8 /* for convenience, report all + ECALLs as this, handler + fixes */ +#define RISCV_EXCP_S_ECALL 0x9 +#define RISCV_EXCP_H_ECALL 0xa +#define RISCV_EXCP_M_ECALL 0xb +#define RISCV_EXCP_INST_PAGE_FAULT 0xc /* since: priv-1.10.0 */ +#define RISCV_EXCP_LOAD_PAGE_FAULT 0xd /* since: priv-1.10.0 */ +#define RISCV_EXCP_STORE_PAGE_FAULT 0xf /* since: priv-1.10.0 */ + +#define TRANSLATE_FAIL 1 +#define TRANSLATE_SUCCESS 0 +#define NB_MMU_MODES 4 +#define MMU_USER_IDX 3 + +#define SSIP_IRQ (env->irq[0]) +#define STIP_IRQ (env->irq[1]) +#define MSIP_IRQ (env->irq[2]) +#define MTIP_IRQ (env->irq[3]) +#define HTIF_IRQ (env->irq[4]) +#define SEIP_IRQ (env->irq[5]) +#define MEIP_IRQ (env->irq[6]) + +#define MAX_RISCV_IRQ (8) +#define MAX_RISCV_PMPS (16) + +typedef struct CPURISCVState CPURISCVState; + +#include "pmp.h" + +typedef struct CPURISCVState { + target_ulong gpr[32]; + uint64_t fpr[32]; /* assume both F and D extensions */ + target_ulong pc; + target_ulong load_res; + + target_ulong frm; + target_ulong fstatus; + target_ulong fflags; + + target_ulong badaddr; + + uint32_t mucounteren; + + target_ulong user_ver; + target_ulong priv_ver; + target_ulong misa_mask; + target_ulong misa; + +#ifdef CONFIG_USER_ONLY + uint32_t amoinsn; + target_long amoaddr; + target_long amotest; +#else + target_ulong priv; + + target_ulong mhartid; + target_ulong mstatus; + target_ulong mip; + target_ulong mie; + target_ulong mideleg; + + target_ulong sptbr; /* until: priv-1.9.1 */ + target_ulong satp; /* since: priv-1.10.0 */ + target_ulong sbadaddr; + target_ulong mbadaddr; + target_ulong medeleg; + + target_ulong stvec; + target_ulong sepc; + target_ulong scause; + + target_ulong mtvec; + target_ulong mepc; + target_ulong mcause; + target_ulong mtval; /* since: priv-1.10.0 */ + + uint32_t mscounteren; + target_ulong scounteren; /* since: priv-1.10.0 */ + target_ulong mcounteren; /* since: priv-1.10.0 */ + + target_ulong sscratch; + target_ulong mscratch; + + /* temporary htif regs */ + uint64_t mfromhost; + uint64_t mtohost; + uint64_t timecmp; + + /* physical memory protection */ + pmp_table_t pmp_state; +#endif + + float_status fp_status; + + /* Internal CPU feature flags. */ + uint64_t features; + + /* QEMU */ + CPU_COMMON + + /* Fields from here on are preserved across CPU reset. */ + void *irq[8]; + QEMUTimer *timer; /* Internal timer */ +} CPURISCVState; + +#define RISCV_CPU_CLASS(klass) \ + OBJECT_CLASS_CHECK(RISCVCPUClass, (klass), TYPE_RISCV_CPU) +#define RISCV_CPU(obj) \ + OBJECT_CHECK(RISCVCPU, (obj), TYPE_RISCV_CPU) +#define RISCV_CPU_GET_CLASS(obj) \ + OBJECT_GET_CLASS(RISCVCPUClass, (obj), TYPE_RISCV_CPU) + +/** + * RISCVCPUClass: + * @parent_realize: The parent class' realize handler. + * @parent_reset: The parent class' reset handler. + * + * A RISCV CPU model. + */ +typedef struct RISCVCPUClass { + /*< private >*/ + CPUClass parent_class; + /*< public >*/ + DeviceRealize parent_realize; + void (*parent_reset)(CPUState *cpu); +} RISCVCPUClass; + +/** + * RISCVCPU: + * @env: #CPURISCVState + * + * A RISCV CPU. + */ +typedef struct RISCVCPU { + /*< private >*/ + CPUState parent_obj; + /*< public >*/ + CPURISCVState env; +} RISCVCPU; + +static inline RISCVCPU *riscv_env_get_cpu(CPURISCVState *env) +{ + return container_of(env, RISCVCPU, env); +} + +enum riscv_features { + RISCV_FEATURE_RVM, + RISCV_FEATURE_RVA, + RISCV_FEATURE_RVF, + RISCV_FEATURE_RVD, + RISCV_FEATURE_RVC, +}; + +static inline int riscv_feature(CPURISCVState *env, int feature) +{ + return (env->features & (1ULL << feature)) != 0; +} + +#include "cpu_user.h" +#include "cpu_bits.h" + +#define ENV_GET_CPU(e) CPU(riscv_env_get_cpu(e)) +#define ENV_OFFSET offsetof(RISCVCPU, env) + +void riscv_cpu_do_interrupt(CPUState *cpu); +void riscv_cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, + int flags); +hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); +int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); +int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); +bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request); +void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, + MMUAccessType access_type, int mmu_idx, + uintptr_t retaddr); +#if !defined(CONFIG_USER_ONLY) +void riscv_cpu_unassigned_access(CPUState *cpu, hwaddr addr, bool is_write, + bool is_exec, int unused, unsigned size); +#endif + +char *riscv_isa_string(RISCVCPU *cpu); +void riscv_cpu_list(FILE *f, fprintf_function cpu_fprintf); + +#define cpu_init(cpu_model) cpu_generic_init(TYPE_RISCV_CPU, cpu_model) +#define cpu_signal_handler cpu_riscv_signal_handler +#define cpu_list riscv_cpu_list + +void set_privilege(CPURISCVState *env, target_ulong newpriv); +unsigned int softfloat_flags_to_riscv(unsigned int flag); +uint_fast16_t float32_classify(uint32_t a, float_status *status); +uint_fast16_t float64_classify(uint64_t a, float_status *status); + +/* + * Compute mmu index + * Adapted from Spike's mmu_t::translate + */ +#ifdef CONFIG_USER_ONLY +static inline int cpu_mmu_index(CPURISCVState *env, bool ifetch) +{ + return 0; +} +#else +static inline int cpu_mmu_index(CPURISCVState *env, bool ifetch) +{ + target_ulong mode = env->priv; + if (!ifetch) { + if (get_field(env->mstatus, MSTATUS_MPRV)) { + mode = get_field(env->mstatus, MSTATUS_MPP); + } + } + if (env->priv_ver >= PRIV_VERSION_1_10_0) { + if (get_field(env->satp, SATP_MODE) == VM_1_10_MBARE) { + mode = PRV_M; + } + } else { + if (get_field(env->mstatus, MSTATUS_VM) == VM_1_09_MBARE) { + mode = PRV_M; + } + } + return mode; +} +#endif + +#ifndef CONFIG_USER_ONLY +/* + * Return RISC-V IRQ number if an interrupt should be taken, else -1. + * Used in cpu-exec.c + * + * Adapted from Spike's processor_t::take_interrupt() + */ +static inline int cpu_riscv_hw_interrupts_pending(CPURISCVState *env) +{ + target_ulong pending_interrupts = env->mip & env->mie; + + target_ulong mie = get_field(env->mstatus, MSTATUS_MIE); + target_ulong m_enabled = env->priv < PRV_M || (env->priv == PRV_M && mie); + target_ulong enabled_interrupts = pending_interrupts & + ~env->mideleg & -m_enabled; + + target_ulong sie = get_field(env->mstatus, MSTATUS_SIE); + target_ulong s_enabled = env->priv < PRV_S || (env->priv == PRV_S && sie); + enabled_interrupts |= pending_interrupts & env->mideleg & + -s_enabled; + + if (enabled_interrupts) { + target_ulong counted = ctz64(enabled_interrupts); /* since non-zero */ + if (counted == IRQ_X_HOST) { + /* we're handing it to the cpu now, so get rid of the qemu irq */ + qemu_irq_lower(HTIF_IRQ); + } else if (counted == IRQ_M_TIMER) { + /* we're handing it to the cpu now, so get rid of the qemu irq */ + qemu_irq_lower(MTIP_IRQ); + } else if (counted == IRQ_S_TIMER || counted == IRQ_H_TIMER) { + /* don't lower irq here */ + } + return counted; + } else { + return EXCP_NONE; /* indicates no pending interrupt */ + } +} +#endif + +#include "exec/cpu-all.h" + +void riscv_translate_init(void); +RISCVCPU *cpu_riscv_init(const char *cpu_model); +int cpu_riscv_signal_handler(int host_signum, void *pinfo, void *puc); +void QEMU_NORETURN do_raise_exception_err(CPURISCVState *env, + uint32_t exception, uintptr_t pc); + +/* hw/riscv/sifive_clint.c - supplies instret by approximating */ +uint64_t cpu_riscv_read_instret(CPURISCVState *env); +uint64_t cpu_riscv_read_rtc(void); + +int riscv_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw, + int mmu_idx); +#if !defined(CONFIG_USER_ONLY) +hwaddr cpu_riscv_translate_address(CPURISCVState *env, target_ulong address, + int rw); +#endif + +static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc, + target_ulong *cs_base, uint32_t *flags) +{ + *pc = env->pc; + *cs_base = 0; + *flags = 0; /* necessary to avoid compiler warning */ +} + +void csr_write_helper(CPURISCVState *env, target_ulong val_to_write, + target_ulong csrno); +target_ulong csr_read_helper(CPURISCVState *env, target_ulong csrno); + +void validate_csr(CPURISCVState *env, uint64_t which, uint64_t write); + +#endif /* RISCV_CPU_H */ diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h new file mode 100644 index 0000000..f9698a9 --- /dev/null +++ b/target/riscv/cpu_bits.h @@ -0,0 +1,411 @@ +/* Below taken from Spike's decode.h and encoding.h. + * Using these directly drastically simplifies updating to new versions of the + * RISC-V privileged specification */ + +#define get_field(reg, mask) (((reg) & \ + (target_ulong)(mask)) / ((mask) & ~((mask) << 1))) +#define set_field(reg, mask, val) (((reg) & ~(target_ulong)(mask)) | \ + (((target_ulong)(val) * ((mask) & ~((mask) << 1))) & \ + (target_ulong)(mask))) + +#define PGSHIFT 12 + +#define FP_RD_NE 0 +#define FP_RD_0 1 +#define FP_RD_DN 2 +#define FP_RD_UP 3 +#define FP_RD_NMM 4 + +#define FSR_RD_SHIFT 5 +#define FSR_RD (0x7 << FSR_RD_SHIFT) + +#define FPEXC_NX 0x01 +#define FPEXC_UF 0x02 +#define FPEXC_OF 0x04 +#define FPEXC_DZ 0x08 +#define FPEXC_NV 0x10 + +#define FSR_AEXC_SHIFT 0 +#define FSR_NVA (FPEXC_NV << FSR_AEXC_SHIFT) +#define FSR_OFA (FPEXC_OF << FSR_AEXC_SHIFT) +#define FSR_UFA (FPEXC_UF << FSR_AEXC_SHIFT) +#define FSR_DZA (FPEXC_DZ << FSR_AEXC_SHIFT) +#define FSR_NXA (FPEXC_NX << FSR_AEXC_SHIFT) +#define FSR_AEXC (FSR_NVA | FSR_OFA | FSR_UFA | FSR_DZA | FSR_NXA) + +#define CSR_FFLAGS 0x1 +#define CSR_FRM 0x2 +#define CSR_FCSR 0x3 +#define CSR_CYCLE 0xc00 +#define CSR_TIME 0xc01 +#define CSR_INSTRET 0xc02 +#define CSR_HPMCOUNTER3 0xc03 +#define CSR_HPMCOUNTER4 0xc04 +#define CSR_HPMCOUNTER5 0xc05 +#define CSR_HPMCOUNTER6 0xc06 +#define CSR_HPMCOUNTER7 0xc07 +#define CSR_HPMCOUNTER8 0xc08 +#define CSR_HPMCOUNTER9 0xc09 +#define CSR_HPMCOUNTER10 0xc0a +#define CSR_HPMCOUNTER11 0xc0b +#define CSR_HPMCOUNTER12 0xc0c +#define CSR_HPMCOUNTER13 0xc0d +#define CSR_HPMCOUNTER14 0xc0e +#define CSR_HPMCOUNTER15 0xc0f +#define CSR_HPMCOUNTER16 0xc10 +#define CSR_HPMCOUNTER17 0xc11 +#define CSR_HPMCOUNTER18 0xc12 +#define CSR_HPMCOUNTER19 0xc13 +#define CSR_HPMCOUNTER20 0xc14 +#define CSR_HPMCOUNTER21 0xc15 +#define CSR_HPMCOUNTER22 0xc16 +#define CSR_HPMCOUNTER23 0xc17 +#define CSR_HPMCOUNTER24 0xc18 +#define CSR_HPMCOUNTER25 0xc19 +#define CSR_HPMCOUNTER26 0xc1a +#define CSR_HPMCOUNTER27 0xc1b +#define CSR_HPMCOUNTER28 0xc1c +#define CSR_HPMCOUNTER29 0xc1d +#define CSR_HPMCOUNTER30 0xc1e +#define CSR_HPMCOUNTER31 0xc1f +#define CSR_SSTATUS 0x100 +#define CSR_SIE 0x104 +#define CSR_STVEC 0x105 +#define CSR_SCOUNTEREN 0x106 +#define CSR_SSCRATCH 0x140 +#define CSR_SEPC 0x141 +#define CSR_SCAUSE 0x142 +#define CSR_SBADADDR 0x143 +#define CSR_SIP 0x144 +#define CSR_SPTBR 0x180 +#define CSR_SATP 0x180 +#define CSR_MSTATUS 0x300 +#define CSR_MISA 0x301 +#define CSR_MEDELEG 0x302 +#define CSR_MIDELEG 0x303 +#define CSR_MIE 0x304 +#define CSR_MTVEC 0x305 +#define CSR_MCOUNTEREN 0x306 +#define CSR_MSCRATCH 0x340 +#define CSR_MEPC 0x341 +#define CSR_MCAUSE 0x342 +#define CSR_MBADADDR 0x343 +#define CSR_MIP 0x344 +#define CSR_PMPCFG0 0x3a0 +#define CSR_PMPCFG1 0x3a1 +#define CSR_PMPCFG2 0x3a2 +#define CSR_PMPCFG3 0x3a3 +#define CSR_PMPADDR0 0x3b0 +#define CSR_PMPADDR1 0x3b1 +#define CSR_PMPADDR2 0x3b2 +#define CSR_PMPADDR3 0x3b3 +#define CSR_PMPADDR4 0x3b4 +#define CSR_PMPADDR5 0x3b5 +#define CSR_PMPADDR6 0x3b6 +#define CSR_PMPADDR7 0x3b7 +#define CSR_PMPADDR8 0x3b8 +#define CSR_PMPADDR9 0x3b9 +#define CSR_PMPADDR10 0x3ba +#define CSR_PMPADDR11 0x3bb +#define CSR_PMPADDR12 0x3bc +#define CSR_PMPADDR13 0x3bd +#define CSR_PMPADDR14 0x3be +#define CSR_PMPADDR15 0x3bf +#define CSR_TSELECT 0x7a0 +#define CSR_TDATA1 0x7a1 +#define CSR_TDATA2 0x7a2 +#define CSR_TDATA3 0x7a3 +#define CSR_DCSR 0x7b0 +#define CSR_DPC 0x7b1 +#define CSR_DSCRATCH 0x7b2 +#define CSR_MCYCLE 0xb00 +#define CSR_MINSTRET 0xb02 +#define CSR_MHPMCOUNTER3 0xb03 +#define CSR_MHPMCOUNTER4 0xb04 +#define CSR_MHPMCOUNTER5 0xb05 +#define CSR_MHPMCOUNTER6 0xb06 +#define CSR_MHPMCOUNTER7 0xb07 +#define CSR_MHPMCOUNTER8 0xb08 +#define CSR_MHPMCOUNTER9 0xb09 +#define CSR_MHPMCOUNTER10 0xb0a +#define CSR_MHPMCOUNTER11 0xb0b +#define CSR_MHPMCOUNTER12 0xb0c +#define CSR_MHPMCOUNTER13 0xb0d +#define CSR_MHPMCOUNTER14 0xb0e +#define CSR_MHPMCOUNTER15 0xb0f +#define CSR_MHPMCOUNTER16 0xb10 +#define CSR_MHPMCOUNTER17 0xb11 +#define CSR_MHPMCOUNTER18 0xb12 +#define CSR_MHPMCOUNTER19 0xb13 +#define CSR_MHPMCOUNTER20 0xb14 +#define CSR_MHPMCOUNTER21 0xb15 +#define CSR_MHPMCOUNTER22 0xb16 +#define CSR_MHPMCOUNTER23 0xb17 +#define CSR_MHPMCOUNTER24 0xb18 +#define CSR_MHPMCOUNTER25 0xb19 +#define CSR_MHPMCOUNTER26 0xb1a +#define CSR_MHPMCOUNTER27 0xb1b +#define CSR_MHPMCOUNTER28 0xb1c +#define CSR_MHPMCOUNTER29 0xb1d +#define CSR_MHPMCOUNTER30 0xb1e +#define CSR_MHPMCOUNTER31 0xb1f +#define CSR_MUCOUNTEREN 0x320 +#define CSR_MSCOUNTEREN 0x321 +#define CSR_MHPMEVENT3 0x323 +#define CSR_MHPMEVENT4 0x324 +#define CSR_MHPMEVENT5 0x325 +#define CSR_MHPMEVENT6 0x326 +#define CSR_MHPMEVENT7 0x327 +#define CSR_MHPMEVENT8 0x328 +#define CSR_MHPMEVENT9 0x329 +#define CSR_MHPMEVENT10 0x32a +#define CSR_MHPMEVENT11 0x32b +#define CSR_MHPMEVENT12 0x32c +#define CSR_MHPMEVENT13 0x32d +#define CSR_MHPMEVENT14 0x32e +#define CSR_MHPMEVENT15 0x32f +#define CSR_MHPMEVENT16 0x330 +#define CSR_MHPMEVENT17 0x331 +#define CSR_MHPMEVENT18 0x332 +#define CSR_MHPMEVENT19 0x333 +#define CSR_MHPMEVENT20 0x334 +#define CSR_MHPMEVENT21 0x335 +#define CSR_MHPMEVENT22 0x336 +#define CSR_MHPMEVENT23 0x337 +#define CSR_MHPMEVENT24 0x338 +#define CSR_MHPMEVENT25 0x339 +#define CSR_MHPMEVENT26 0x33a +#define CSR_MHPMEVENT27 0x33b +#define CSR_MHPMEVENT28 0x33c +#define CSR_MHPMEVENT29 0x33d +#define CSR_MHPMEVENT30 0x33e +#define CSR_MHPMEVENT31 0x33f +#define CSR_MVENDORID 0xf11 +#define CSR_MARCHID 0xf12 +#define CSR_MIMPID 0xf13 +#define CSR_MHARTID 0xf14 +#define CSR_CYCLEH 0xc80 +#define CSR_TIMEH 0xc81 +#define CSR_INSTRETH 0xc82 +#define CSR_HPMCOUNTER3H 0xc83 +#define CSR_HPMCOUNTER4H 0xc84 +#define CSR_HPMCOUNTER5H 0xc85 +#define CSR_HPMCOUNTER6H 0xc86 +#define CSR_HPMCOUNTER7H 0xc87 +#define CSR_HPMCOUNTER8H 0xc88 +#define CSR_HPMCOUNTER9H 0xc89 +#define CSR_HPMCOUNTER10H 0xc8a +#define CSR_HPMCOUNTER11H 0xc8b +#define CSR_HPMCOUNTER12H 0xc8c +#define CSR_HPMCOUNTER13H 0xc8d +#define CSR_HPMCOUNTER14H 0xc8e +#define CSR_HPMCOUNTER15H 0xc8f +#define CSR_HPMCOUNTER16H 0xc90 +#define CSR_HPMCOUNTER17H 0xc91 +#define CSR_HPMCOUNTER18H 0xc92 +#define CSR_HPMCOUNTER19H 0xc93 +#define CSR_HPMCOUNTER20H 0xc94 +#define CSR_HPMCOUNTER21H 0xc95 +#define CSR_HPMCOUNTER22H 0xc96 +#define CSR_HPMCOUNTER23H 0xc97 +#define CSR_HPMCOUNTER24H 0xc98 +#define CSR_HPMCOUNTER25H 0xc99 +#define CSR_HPMCOUNTER26H 0xc9a +#define CSR_HPMCOUNTER27H 0xc9b +#define CSR_HPMCOUNTER28H 0xc9c +#define CSR_HPMCOUNTER29H 0xc9d +#define CSR_HPMCOUNTER30H 0xc9e +#define CSR_HPMCOUNTER31H 0xc9f +#define CSR_MCYCLEH 0xb80 +#define CSR_MINSTRETH 0xb82 +#define CSR_MHPMCOUNTER3H 0xb83 +#define CSR_MHPMCOUNTER4H 0xb84 +#define CSR_MHPMCOUNTER5H 0xb85 +#define CSR_MHPMCOUNTER6H 0xb86 +#define CSR_MHPMCOUNTER7H 0xb87 +#define CSR_MHPMCOUNTER8H 0xb88 +#define CSR_MHPMCOUNTER9H 0xb89 +#define CSR_MHPMCOUNTER10H 0xb8a +#define CSR_MHPMCOUNTER11H 0xb8b +#define CSR_MHPMCOUNTER12H 0xb8c +#define CSR_MHPMCOUNTER13H 0xb8d +#define CSR_MHPMCOUNTER14H 0xb8e +#define CSR_MHPMCOUNTER15H 0xb8f +#define CSR_MHPMCOUNTER16H 0xb90 +#define CSR_MHPMCOUNTER17H 0xb91 +#define CSR_MHPMCOUNTER18H 0xb92 +#define CSR_MHPMCOUNTER19H 0xb93 +#define CSR_MHPMCOUNTER20H 0xb94 +#define CSR_MHPMCOUNTER21H 0xb95 +#define CSR_MHPMCOUNTER22H 0xb96 +#define CSR_MHPMCOUNTER23H 0xb97 +#define CSR_MHPMCOUNTER24H 0xb98 +#define CSR_MHPMCOUNTER25H 0xb99 +#define CSR_MHPMCOUNTER26H 0xb9a +#define CSR_MHPMCOUNTER27H 0xb9b +#define CSR_MHPMCOUNTER28H 0xb9c +#define CSR_MHPMCOUNTER29H 0xb9d +#define CSR_MHPMCOUNTER30H 0xb9e +#define CSR_MHPMCOUNTER31H 0xb9f + +#define MSTATUS_UIE 0x00000001 +#define MSTATUS_SIE 0x00000002 +#define MSTATUS_HIE 0x00000004 +#define MSTATUS_MIE 0x00000008 +#define MSTATUS_UPIE 0x00000010 +#define MSTATUS_SPIE 0x00000020 +#define MSTATUS_HPIE 0x00000040 +#define MSTATUS_MPIE 0x00000080 +#define MSTATUS_SPP 0x00000100 +#define MSTATUS_HPP 0x00000600 +#define MSTATUS_MPP 0x00001800 +#define MSTATUS_FS 0x00006000 +#define MSTATUS_XS 0x00018000 +#define MSTATUS_MPRV 0x00020000 +#define MSTATUS_PUM 0x00040000 /* until: priv-1.9.1 */ +#define MSTATUS_SUM 0x00040000 /* since: priv-1.10 */ +#define MSTATUS_MXR 0x00080000 +#define MSTATUS_VM 0x1F000000 /* until: priv-1.9.1 */ +#define MSTATUS_TVM 0x00100000 /* since: priv-1.10 */ +#define MSTATUS_TW 0x20000000 /* since: priv-1.10 */ +#define MSTATUS_TSR 0x40000000 /* since: priv-1.10 */ + +#define MSTATUS64_UXL 0x0000000300000000 +#define MSTATUS64_SXL 0x0000000C00000000 + +#define MSTATUS32_SD 0x80000000 +#define MSTATUS64_SD 0x8000000000000000 + +#if defined(TARGET_RISCV32) +#define MSTATUS_SD MSTATUS32_SD +#elif defined(TARGET_RISCV64) +#define MSTATUS_SD MSTATUS64_SD +#endif + +#define SSTATUS_UIE 0x00000001 +#define SSTATUS_SIE 0x00000002 +#define SSTATUS_UPIE 0x00000010 +#define SSTATUS_SPIE 0x00000020 +#define SSTATUS_SPP 0x00000100 +#define SSTATUS_FS 0x00006000 +#define SSTATUS_XS 0x00018000 +#define SSTATUS_PUM 0x00040000 /* until: priv-1.9.1 */ +#define SSTATUS_SUM 0x00040000 /* since: priv-1.10 */ +#define SSTATUS_MXR 0x00080000 + +#define SSTATUS32_SD 0x80000000 +#define SSTATUS64_SD 0x8000000000000000 + +#if defined(TARGET_RISCV32) +#define SSTATUS_SD SSTATUS32_SD +#elif defined(TARGET_RISCV64) +#define SSTATUS_SD SSTATUS64_SD +#endif + +#define MIP_SSIP (1 << IRQ_S_SOFT) +#define MIP_HSIP (1 << IRQ_H_SOFT) +#define MIP_MSIP (1 << IRQ_M_SOFT) +#define MIP_STIP (1 << IRQ_S_TIMER) +#define MIP_HTIP (1 << IRQ_H_TIMER) +#define MIP_MTIP (1 << IRQ_M_TIMER) +#define MIP_SEIP (1 << IRQ_S_EXT) +#define MIP_HEIP (1 << IRQ_H_EXT) +#define MIP_MEIP (1 << IRQ_M_EXT) + +#define SIP_SSIP MIP_SSIP +#define SIP_STIP MIP_STIP +#define SIP_SEIP MIP_SEIP + +#define PRV_U 0 +#define PRV_S 1 +#define PRV_H 2 +#define PRV_M 3 + +/* privileged ISA 1.9.1 VM modes (mstatus.vm) */ +#define VM_1_09_MBARE 0 +#define VM_1_09_MBB 1 +#define VM_1_09_MBBID 2 +#define VM_1_09_SV32 8 +#define VM_1_09_SV39 9 +#define VM_1_09_SV48 10 + +/* privileged ISA 1.10.0 VM modes (satp.mode) */ +#define VM_1_10_MBARE 0 +#define VM_1_10_SV32 1 +#define VM_1_10_SV39 8 +#define VM_1_10_SV48 9 +#define VM_1_10_SV57 10 +#define VM_1_10_SV64 11 + +/* privileged ISA interrupt causes */ +#define IRQ_U_SOFT 0 /* since: priv-1.10 */ +#define IRQ_S_SOFT 1 +#define IRQ_H_SOFT 2 /* until: priv-1.9.1 */ +#define IRQ_M_SOFT 3 /* until: priv-1.9.1 */ +#define IRQ_U_TIMER 4 /* since: priv-1.10 */ +#define IRQ_S_TIMER 5 +#define IRQ_H_TIMER 6 /* until: priv-1.9.1 */ +#define IRQ_M_TIMER 7 /* until: priv-1.9.1 */ +#define IRQ_U_EXT 8 /* since: priv-1.10 */ +#define IRQ_S_EXT 9 +#define IRQ_H_EXT 10 /* until: priv-1.9.1 */ +#define IRQ_M_EXT 11 /* until: priv-1.9.1 */ +#define IRQ_X_COP 12 /* non-standard */ +#define IRQ_X_HOST 13 /* non-standard */ + +/* Default addresses */ +#define DEFAULT_RSTVEC 0x00001000 +#define DEFAULT_NMIVEC 0x00001004 +#define DEFAULT_MTVEC 0x00001010 +#define CONFIG_STRING_ADDR 0x0000100C +#define EXT_IO_BASE 0x40000000 +#define DRAM_BASE 0x80000000 + +/* RV32 satp field masks */ +#define SATP32_MODE 0x80000000 +#define SATP32_ASID 0x7fc00000 +#define SATP32_PPN 0x003fffff + +/* RV64 satp field masks */ +#define SATP64_MODE 0xF000000000000000 +#define SATP64_ASID 0x0FFFF00000000000 +#define SATP64_PPN 0x00000FFFFFFFFFFF + +#if defined(TARGET_RISCV32) +#define SATP_MODE SATP32_MODE +#define SATP_ASID SATP32_ASID +#define SATP_PPN SATP32_PPN +#endif +#if defined(TARGET_RISCV64) +#define SATP_MODE SATP64_MODE +#define SATP_ASID SATP64_ASID +#define SATP_PPN SATP64_PPN +#endif + +/* breakpoint control fields */ +#define BPCONTROL_X 0x00000001 +#define BPCONTROL_W 0x00000002 +#define BPCONTROL_R 0x00000004 +#define BPCONTROL_U 0x00000008 +#define BPCONTROL_S 0x00000010 +#define BPCONTROL_H 0x00000020 +#define BPCONTROL_M 0x00000040 +#define BPCONTROL_BPMATCH 0x00000780 +#define BPCONTROL_BPAMASKMAX 0x0F80000000000000 +#define BPCONTROL_TDRTYPE 0xF000000000000000 + +/* page table entry (PTE) fields */ +#define PTE_V 0x001 /* Valid */ +#define PTE_R 0x002 /* Read */ +#define PTE_W 0x004 /* Write */ +#define PTE_X 0x008 /* Execute */ +#define PTE_U 0x010 /* User */ +#define PTE_G 0x020 /* Global */ +#define PTE_A 0x040 /* Accessed */ +#define PTE_D 0x080 /* Dirty */ +#define PTE_SOFT 0x300 /* Reserved for Software */ + +#define PTE_PPN_SHIFT 10 + +#define PTE_TABLE(PTE) (((PTE) & (PTE_V | PTE_R | PTE_W | PTE_X)) == PTE_V) +/* end Spike decode.h, encoding.h section */