/* * OpenRISC virtual CPU header. * * Copyright (c) 2011-2012 Jia Liu * * 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 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 . */ #ifndef CPU_OPENRISC_H #define CPU_OPENRISC_H #define TARGET_LONG_BITS 32 #define ELF_MACHINE EM_OPENRISC #define CPUArchState struct CPUOpenRISCState /* cpu_openrisc_map_address_* in CPUOpenRISCTLBContext need this decl. */ struct OpenRISCCPU; #include "config.h" #include "qemu-common.h" #include "cpu-defs.h" #include "softfloat.h" #include "qemu/cpu.h" #include "error.h" #define TYPE_OPENRISC_CPU "or32-cpu" #define OPENRISC_CPU_CLASS(klass) \ OBJECT_CLASS_CHECK(OpenRISCCPUClass, (klass), TYPE_OPENRISC_CPU) #define OPENRISC_CPU(obj) \ OBJECT_CHECK(OpenRISCCPU, (obj), TYPE_OPENRISC_CPU) #define OPENRISC_CPU_GET_CLASS(obj) \ OBJECT_GET_CLASS(OpenRISCCPUClass, (obj), TYPE_OPENRISC_CPU) /** * OpenRISCCPUClass: * @parent_reset: The parent class' reset handler. * * A OpenRISC CPU model. */ typedef struct OpenRISCCPUClass { /*< private >*/ CPUClass parent_class; /*< public >*/ void (*parent_reset)(CPUState *cpu); } OpenRISCCPUClass; #define NB_MMU_MODES 3 enum { MMU_NOMMU_IDX = 0, MMU_SUPERVISOR_IDX = 1, MMU_USER_IDX = 2, }; #define TARGET_PAGE_BITS 13 #define TARGET_PHYS_ADDR_SPACE_BITS 32 #define TARGET_VIRT_ADDR_SPACE_BITS 32 #define SET_FP_CAUSE(reg, v) do {\ (reg) = ((reg) & ~(0x3f << 12)) | \ ((v & 0x3f) << 12);\ } while (0) #define GET_FP_ENABLE(reg) (((reg) >> 7) & 0x1f) #define UPDATE_FP_FLAGS(reg, v) do {\ (reg) |= ((v & 0x1f) << 2);\ } while (0) /* Internal flags, delay slot flag */ #define D_FLAG 1 /* Interrupt */ #define NR_IRQS 32 /* Registers */ enum { R0 = 0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31 }; /* Register aliases */ enum { R_ZERO = R0, R_SP = R1, R_FP = R2, R_LR = R9, R_RV = R11, R_RVH = R12 }; /* Unit presece register */ enum { UPR_UP = (1 << 0), UPR_DCP = (1 << 1), UPR_ICP = (1 << 2), UPR_DMP = (1 << 3), UPR_IMP = (1 << 4), UPR_MP = (1 << 5), UPR_DUP = (1 << 6), UPR_PCUR = (1 << 7), UPR_PMP = (1 << 8), UPR_PICP = (1 << 9), UPR_TTP = (1 << 10), UPR_CUP = (255 << 24), }; /* CPU configure register */ enum { CPUCFGR_NSGF = (15 << 0), CPUCFGR_CGF = (1 << 4), CPUCFGR_OB32S = (1 << 5), CPUCFGR_OB64S = (1 << 6), CPUCFGR_OF32S = (1 << 7), CPUCFGR_OF64S = (1 << 8), CPUCFGR_OV64S = (1 << 9), }; /* DMMU configure register */ enum { DMMUCFGR_NTW = (3 << 0), DMMUCFGR_NTS = (7 << 2), DMMUCFGR_NAE = (7 << 5), DMMUCFGR_CRI = (1 << 8), DMMUCFGR_PRI = (1 << 9), DMMUCFGR_TEIRI = (1 << 10), DMMUCFGR_HTR = (1 << 11), }; /* IMMU configure register */ enum { IMMUCFGR_NTW = (3 << 0), IMMUCFGR_NTS = (7 << 2), IMMUCFGR_NAE = (7 << 5), IMMUCFGR_CRI = (1 << 8), IMMUCFGR_PRI = (1 << 9), IMMUCFGR_TEIRI = (1 << 10), IMMUCFGR_HTR = (1 << 11), }; /* Float point control status register */ enum { FPCSR_FPEE = 1, FPCSR_RM = (3 << 1), FPCSR_OVF = (1 << 3), FPCSR_UNF = (1 << 4), FPCSR_SNF = (1 << 5), FPCSR_QNF = (1 << 6), FPCSR_ZF = (1 << 7), FPCSR_IXF = (1 << 8), FPCSR_IVF = (1 << 9), FPCSR_INF = (1 << 10), FPCSR_DZF = (1 << 11), }; /* Exceptions indices */ enum { EXCP_RESET = 0x1, EXCP_BUSERR = 0x2, EXCP_DPF = 0x3, EXCP_IPF = 0x4, EXCP_TICK = 0x5, EXCP_ALIGN = 0x6, EXCP_ILLEGAL = 0x7, EXCP_INT = 0x8, EXCP_DTLBMISS = 0x9, EXCP_ITLBMISS = 0xa, EXCP_RANGE = 0xb, EXCP_SYSCALL = 0xc, EXCP_FPE = 0xd, EXCP_TRAP = 0xe, EXCP_NR, }; /* Supervisor register */ enum { SR_SM = (1 << 0), SR_TEE = (1 << 1), SR_IEE = (1 << 2), SR_DCE = (1 << 3), SR_ICE = (1 << 4), SR_DME = (1 << 5), SR_IME = (1 << 6), SR_LEE = (1 << 7), SR_CE = (1 << 8), SR_F = (1 << 9), SR_CY = (1 << 10), SR_OV = (1 << 11), SR_OVE = (1 << 12), SR_DSX = (1 << 13), SR_EPH = (1 << 14), SR_FO = (1 << 15), SR_SUMRA = (1 << 16), SR_SCE = (1 << 17), }; /* OpenRISC Hardware Capabilities */ enum { OPENRISC_FEATURE_NSGF = (15 << 0), OPENRISC_FEATURE_CGF = (1 << 4), OPENRISC_FEATURE_OB32S = (1 << 5), OPENRISC_FEATURE_OB64S = (1 << 6), OPENRISC_FEATURE_OF32S = (1 << 7), OPENRISC_FEATURE_OF64S = (1 << 8), OPENRISC_FEATURE_OV64S = (1 << 9), }; /* Tick Timer Mode Register */ enum { TTMR_TP = (0xfffffff), TTMR_IP = (1 << 28), TTMR_IE = (1 << 29), TTMR_M = (3 << 30), }; /* Timer Mode */ enum { TIMER_NONE = (0 << 30), TIMER_INTR = (1 << 30), TIMER_SHOT = (2 << 30), TIMER_CONT = (3 << 30), }; /* TLB size */ enum { DTLB_WAYS = 1, DTLB_SIZE = 64, DTLB_MASK = (DTLB_SIZE-1), ITLB_WAYS = 1, ITLB_SIZE = 64, ITLB_MASK = (ITLB_SIZE-1), }; /* TLB prot */ enum { URE = (1 << 6), UWE = (1 << 7), SRE = (1 << 8), SWE = (1 << 9), SXE = (1 << 6), UXE = (1 << 7), }; /* check if tlb available */ enum { TLBRET_INVALID = -3, TLBRET_NOMATCH = -2, TLBRET_BADADDR = -1, TLBRET_MATCH = 0 }; typedef struct OpenRISCTLBEntry { uint32_t mr; uint32_t tr; } OpenRISCTLBEntry; #ifndef CONFIG_USER_ONLY typedef struct CPUOpenRISCTLBContext { OpenRISCTLBEntry itlb[ITLB_WAYS][ITLB_SIZE]; OpenRISCTLBEntry dtlb[DTLB_WAYS][DTLB_SIZE]; int (*cpu_openrisc_map_address_code)(struct OpenRISCCPU *cpu, target_phys_addr_t *physical, int *prot, target_ulong address, int rw); int (*cpu_openrisc_map_address_data)(struct OpenRISCCPU *cpu, target_phys_addr_t *physical, int *prot, target_ulong address, int rw); } CPUOpenRISCTLBContext; #endif typedef struct CPUOpenRISCState { target_ulong gpr[32]; /* General registers */ target_ulong pc; /* Program counter */ target_ulong npc; /* Next PC */ target_ulong ppc; /* Prev PC */ target_ulong jmp_pc; /* Jump PC */ target_ulong machi; /* Multiply register MACHI */ target_ulong maclo; /* Multiply register MACLO */ target_ulong fpmaddhi; /* Multiply and add float register FPMADDHI */ target_ulong fpmaddlo; /* Multiply and add float register FPMADDLO */ target_ulong epcr; /* Exception PC register */ target_ulong eear; /* Exception EA register */ uint32_t sr; /* Supervisor register */ uint32_t vr; /* Version register */ uint32_t upr; /* Unit presence register */ uint32_t cpucfgr; /* CPU configure register */ uint32_t dmmucfgr; /* DMMU configure register */ uint32_t immucfgr; /* IMMU configure register */ uint32_t esr; /* Exception supervisor register */ uint32_t fpcsr; /* Float register */ float_status fp_status; uint32_t flags; /* cpu_flags, we only use it for exception in solt so far. */ uint32_t btaken; /* the SR_F bit */ CPU_COMMON #ifndef CONFIG_USER_ONLY CPUOpenRISCTLBContext * tlb; struct QEMUTimer *timer; uint32_t ttmr; /* Timer tick mode register */ uint32_t ttcr; /* Timer tick count register */ uint32_t picmr; /* Interrupt mask register */ uint32_t picsr; /* Interrupt contrl register*/ #endif void *irq[32]; /* Interrupt irq input */ } CPUOpenRISCState; /** * OpenRISCCPU: * @env: #CPUOpenRISCState * * A OpenRISC CPU. */ typedef struct OpenRISCCPU { /*< private >*/ CPUState parent_obj; /*< public >*/ CPUOpenRISCState env; uint32_t feature; /* CPU Capabilities */ } OpenRISCCPU; static inline OpenRISCCPU *openrisc_env_get_cpu(CPUOpenRISCState *env) { return OPENRISC_CPU(container_of(env, OpenRISCCPU, env)); } #define ENV_GET_CPU(e) CPU(openrisc_env_get_cpu(e)) OpenRISCCPU *cpu_openrisc_init(const char *cpu_model); void openrisc_cpu_realize(Object *obj, Error **errp); void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf); int cpu_openrisc_exec(CPUOpenRISCState *s); void do_interrupt(CPUOpenRISCState *env); void openrisc_translate_init(void); int cpu_openrisc_handle_mmu_fault(CPUOpenRISCState *env, target_ulong address, int rw, int mmu_idx); #define cpu_list cpu_openrisc_list #define cpu_exec cpu_openrisc_exec #define cpu_gen_code cpu_openrisc_gen_code #define cpu_handle_mmu_fault cpu_openrisc_handle_mmu_fault #ifndef CONFIG_USER_ONLY /* hw/openrisc_pic.c */ void cpu_openrisc_pic_init(OpenRISCCPU *cpu); /* hw/openrisc_timer.c */ void cpu_openrisc_clock_init(OpenRISCCPU *cpu); void cpu_openrisc_count_update(OpenRISCCPU *cpu); void cpu_openrisc_count_start(OpenRISCCPU *cpu); void cpu_openrisc_count_stop(OpenRISCCPU *cpu); void cpu_openrisc_mmu_init(OpenRISCCPU *cpu); int cpu_openrisc_get_phys_nommu(OpenRISCCPU *cpu, target_phys_addr_t *physical, int *prot, target_ulong address, int rw); int cpu_openrisc_get_phys_code(OpenRISCCPU *cpu, target_phys_addr_t *physical, int *prot, target_ulong address, int rw); int cpu_openrisc_get_phys_data(OpenRISCCPU *cpu, target_phys_addr_t *physical, int *prot, target_ulong address, int rw); #endif static inline CPUOpenRISCState *cpu_init(const char *cpu_model) { OpenRISCCPU *cpu = cpu_openrisc_init(cpu_model); if (cpu) { return &cpu->env; } return NULL; } #include "cpu-all.h" static inline void cpu_get_tb_cpu_state(CPUOpenRISCState *env, target_ulong *pc, target_ulong *cs_base, int *flags) { *pc = env->pc; *cs_base = 0; /* D_FLAG -- branch instruction exception */ *flags = (env->flags & D_FLAG); } static inline int cpu_mmu_index(CPUOpenRISCState *env) { if (!(env->sr & SR_IME)) { return MMU_NOMMU_IDX; } return (env->sr & SR_SM) == 0 ? MMU_USER_IDX : MMU_SUPERVISOR_IDX; } #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_INT_0 static inline bool cpu_has_work(CPUOpenRISCState *env) { return env->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_TIMER); } #include "exec-all.h" static inline target_ulong cpu_get_pc(CPUOpenRISCState *env) { return env->pc; } static inline void cpu_pc_from_tb(CPUOpenRISCState *env, TranslationBlock *tb) { env->pc = tb->pc; } #endif /* CPU_OPENRISC_H */