/* * SH4 emulation * * Copyright (c) 2005 Samuel Tardieu * * 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _CPU_SH4_H #define _CPU_SH4_H #include "config.h" #define TARGET_LONG_BITS 32 #define TARGET_HAS_ICE 1 #define ELF_MACHINE EM_SH #include "cpu-defs.h" #include "softfloat.h" #define TARGET_PAGE_BITS 12 /* 4k XXXXX */ #define SR_MD (1 << 30) #define SR_RB (1 << 29) #define SR_BL (1 << 28) #define SR_FD (1 << 15) #define SR_M (1 << 9) #define SR_Q (1 << 8) #define SR_S (1 << 1) #define SR_T (1 << 0) #define FPSCR_FR (1 << 21) #define FPSCR_SZ (1 << 20) #define FPSCR_PR (1 << 19) #define FPSCR_DN (1 << 18) #define DELAY_SLOT (1 << 0) #define DELAY_SLOT_CONDITIONAL (1 << 1) #define DELAY_SLOT_TRUE (1 << 2) #define DELAY_SLOT_CLEARME (1 << 3) /* The dynamic value of the DELAY_SLOT_TRUE flag determines whether the jump * after the delay slot should be taken or not. It is calculated from SR_T. * * It is unclear if it is permitted to modify the SR_T flag in a delay slot. * The use of DELAY_SLOT_TRUE flag makes us accept such SR_T modification. */ /* XXXXX The structure could be made more compact */ typedef struct tlb_t { uint8_t asid; /* address space identifier */ uint32_t vpn; /* virtual page number */ uint8_t v; /* validity */ uint32_t ppn; /* physical page number */ uint8_t sz; /* page size */ uint32_t size; /* cached page size in bytes */ uint8_t sh; /* share status */ uint8_t c; /* cacheability */ uint8_t pr; /* protection key */ uint8_t d; /* dirty */ uint8_t wt; /* write through */ uint8_t sa; /* space attribute (PCMCIA) */ uint8_t tc; /* timing control */ } tlb_t; #define UTLB_SIZE 64 #define ITLB_SIZE 4 #define NB_MMU_MODES 2 typedef struct CPUSH4State { uint32_t flags; /* general execution flags */ uint32_t gregs[24]; /* general registers */ float32 fregs[32]; /* floating point registers */ uint32_t sr; /* status register */ uint32_t ssr; /* saved status register */ uint32_t spc; /* saved program counter */ uint32_t gbr; /* global base register */ uint32_t vbr; /* vector base register */ uint32_t sgr; /* saved global register 15 */ uint32_t dbr; /* debug base register */ uint32_t pc; /* program counter */ uint32_t delayed_pc; /* target of delayed jump */ uint32_t mach; /* multiply and accumulate high */ uint32_t macl; /* multiply and accumulate low */ uint32_t pr; /* procedure register */ uint32_t fpscr; /* floating point status/control register */ uint32_t fpul; /* floating point communication register */ /* temporary float registers */ float32 ft0, ft1; float64 dt0, dt1; float_status fp_status; /* Those belong to the specific unit (SH7750) but are handled here */ uint32_t mmucr; /* MMU control register */ uint32_t pteh; /* page table entry high register */ uint32_t ptel; /* page table entry low register */ uint32_t ptea; /* page table entry assistance register */ uint32_t ttb; /* tranlation table base register */ uint32_t tea; /* TLB exception address register */ uint32_t tra; /* TRAPA exception register */ uint32_t expevt; /* exception event register */ uint32_t intevt; /* interrupt event register */ int user_mode_only; int interrupt_request; CPU_COMMON tlb_t utlb[UTLB_SIZE]; /* unified translation table */ tlb_t itlb[ITLB_SIZE]; /* instruction translation table */ void *intc_handle; } CPUSH4State; CPUSH4State *cpu_sh4_init(const char *cpu_model); int cpu_sh4_exec(CPUSH4State * s); int cpu_sh4_signal_handler(int host_signum, void *pinfo, void *puc); #include "softfloat.h" #define CPUState CPUSH4State #define cpu_init cpu_sh4_init #define cpu_exec cpu_sh4_exec #define cpu_gen_code cpu_sh4_gen_code #define cpu_signal_handler cpu_sh4_signal_handler /* MMU modes definitions */ #define MMU_MODE0_SUFFIX _kernel #define MMU_MODE1_SUFFIX _user #define MMU_USER_IDX 1 static inline int cpu_mmu_index (CPUState *env) { return (env->sr & SR_MD) == 0 ? 1 : 0; } #if defined(CONFIG_USER_ONLY) static inline void cpu_clone_regs(CPUState *env, target_ulong newsp) { if (newsp) env->gregs[15] = newsp; env->gregs[0] = 0; } #endif #include "cpu-all.h" /* Memory access type */ enum { /* Privilege */ ACCESS_PRIV = 0x01, /* Direction */ ACCESS_WRITE = 0x02, /* Type of instruction */ ACCESS_CODE = 0x10, ACCESS_INT = 0x20 }; /* MMU control register */ #define MMUCR 0x1F000010 #define MMUCR_AT (1<<0) #define MMUCR_SV (1<<8) #define MMUCR_URC_BITS (6) #define MMUCR_URC_OFFSET (10) #define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS) #define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET) static inline int cpu_mmucr_urc (uint32_t mmucr) { return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET); } /* PTEH : Page Translation Entry High register */ #define PTEH_ASID_BITS (8) #define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS) #define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1) #define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK) #define PTEH_VPN_BITS (22) #define PTEH_VPN_OFFSET (10) #define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS) #define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET) static inline int cpu_pteh_vpn (uint32_t pteh) { return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET); } /* PTEL : Page Translation Entry Low register */ #define PTEL_V (1 << 8) #define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8) #define PTEL_C (1 << 3) #define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3) #define PTEL_D (1 << 2) #define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2) #define PTEL_SH (1 << 1) #define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1) #define PTEL_WT (1 << 0) #define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT) #define PTEL_SZ_HIGH_OFFSET (7) #define PTEL_SZ_HIGH (1 << PTEL_SZ_HIGH_OFFSET) #define PTEL_SZ_LOW_OFFSET (4) #define PTEL_SZ_LOW (1 << PTEL_SZ_LOW_OFFSET) static inline int cpu_ptel_sz (uint32_t ptel) { int sz; sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET; sz <<= 1; sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET; return sz; } #define PTEL_PPN_BITS (19) #define PTEL_PPN_OFFSET (10) #define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS) #define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET) static inline int cpu_ptel_ppn (uint32_t ptel) { return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET); } #define PTEL_PR_BITS (2) #define PTEL_PR_OFFSET (5) #define PTEL_PR_SIZE (1 << PTEL_PR_BITS) #define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET) static inline int cpu_ptel_pr (uint32_t ptel) { return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET); } /* PTEA : Page Translation Entry Assistance register */ #define PTEA_SA_BITS (3) #define PTEA_SA_SIZE (1 << PTEA_SA_BITS) #define PTEA_SA_MASK (PTEA_SA_SIZE - 1) #define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK) #define PTEA_TC (1 << 3) #define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3) #endif /* _CPU_SH4_H */