/* * m68k virtual CPU header * * Copyright (c) 2005-2007 CodeSourcery * Written by Paul Brook * * 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 . */ #ifndef M68K_CPU_H #define M68K_CPU_H #include "exec/cpu-defs.h" #include "qemu/cpu-float.h" #include "cpu-qom.h" #define OS_BYTE 0 #define OS_WORD 1 #define OS_LONG 2 #define OS_SINGLE 3 #define OS_DOUBLE 4 #define OS_EXTENDED 5 #define OS_PACKED 6 #define OS_UNSIZED 7 #define EXCP_ACCESS 2 /* Access (MMU) error. */ #define EXCP_ADDRESS 3 /* Address error. */ #define EXCP_ILLEGAL 4 /* Illegal instruction. */ #define EXCP_DIV0 5 /* Divide by zero */ #define EXCP_CHK 6 /* CHK, CHK2 Instructions */ #define EXCP_TRAPCC 7 /* FTRAPcc, TRAPcc, TRAPV Instructions */ #define EXCP_PRIVILEGE 8 /* Privilege violation. */ #define EXCP_TRACE 9 #define EXCP_LINEA 10 /* Unimplemented line-A (MAC) opcode. */ #define EXCP_LINEF 11 /* Unimplemented line-F (FPU) opcode. */ #define EXCP_DEBUGNBP 12 /* Non-breakpoint debug interrupt. */ #define EXCP_DEBEGBP 13 /* Breakpoint debug interrupt. */ #define EXCP_FORMAT 14 /* RTE format error. */ #define EXCP_UNINITIALIZED 15 #define EXCP_SPURIOUS 24 /* Spurious interrupt */ #define EXCP_INT_LEVEL_1 25 /* Level 1 Interrupt autovector */ #define EXCP_INT_LEVEL_7 31 /* Level 7 Interrupt autovector */ #define EXCP_TRAP0 32 /* User trap #0. */ #define EXCP_TRAP15 47 /* User trap #15. */ #define EXCP_FP_BSUN 48 /* Branch Set on Unordered */ #define EXCP_FP_INEX 49 /* Inexact result */ #define EXCP_FP_DZ 50 /* Divide by Zero */ #define EXCP_FP_UNFL 51 /* Underflow */ #define EXCP_FP_OPERR 52 /* Operand Error */ #define EXCP_FP_OVFL 53 /* Overflow */ #define EXCP_FP_SNAN 54 /* Signaling Not-A-Number */ #define EXCP_FP_UNIMP 55 /* Unimplemented Data type */ #define EXCP_MMU_CONF 56 /* MMU Configuration Error */ #define EXCP_MMU_ILLEGAL 57 /* MMU Illegal Operation Error */ #define EXCP_MMU_ACCESS 58 /* MMU Access Level Violation Error */ #define EXCP_RTE 0x100 #define EXCP_HALT_INSN 0x101 #define M68K_DTTR0 0 #define M68K_DTTR1 1 #define M68K_ITTR0 2 #define M68K_ITTR1 3 #define M68K_MAX_TTR 2 #define TTR(type, index) ttr[((type & ACCESS_CODE) == ACCESS_CODE) * 2 + index] #define TARGET_INSN_START_EXTRA_WORDS 1 typedef CPU_LDoubleU FPReg; typedef struct CPUArchState { uint32_t dregs[8]; uint32_t aregs[8]; uint32_t pc; uint32_t sr; /* * The 68020/30/40 support two supervisor stacks, ISP and MSP. * The 68000/10, Coldfire, and CPU32 only have USP/SSP. * * The current_sp is stored in aregs[7], the other here. * The USP, SSP, and if used the additional ISP for 68020/30/40. */ int current_sp; uint32_t sp[3]; /* Condition flags. */ uint32_t cc_op; uint32_t cc_x; /* always 0/1 */ uint32_t cc_n; /* in bit 31 (i.e. negative) */ uint32_t cc_v; /* in bit 31, unused, or computed from cc_n and cc_v */ uint32_t cc_c; /* either 0/1, unused, or computed from cc_n and cc_v */ uint32_t cc_z; /* == 0 or unused */ FPReg fregs[8]; FPReg fp_result; uint32_t fpcr; uint32_t fpsr; float_status fp_status; uint64_t mactmp; /* * EMAC Hardware deals with 48-bit values composed of one 32-bit and * two 8-bit parts. We store a single 64-bit value and * rearrange/extend this when changing modes. */ uint64_t macc[4]; uint32_t macsr; uint32_t mac_mask; /* MMU status. */ struct { uint32_t ar; uint32_t ssw; /* 68040 */ uint16_t tcr; uint32_t urp; uint32_t srp; bool fault; uint32_t ttr[4]; uint32_t mmusr; } mmu; /* Control registers. */ uint32_t vbr; uint32_t mbar; uint32_t rambar0; uint32_t cacr; uint32_t sfc; uint32_t dfc; int pending_vector; int pending_level; /* Fields up to this point are cleared by a CPU reset */ struct {} end_reset_fields; /* Fields from here on are preserved across CPU reset. */ uint32_t features; } CPUM68KState; /* * M68kCPU: * @env: #CPUM68KState * * A Motorola 68k CPU. */ struct ArchCPU { /*< private >*/ CPUState parent_obj; /*< public >*/ CPUNegativeOffsetState neg; CPUM68KState env; }; #ifndef CONFIG_USER_ONLY void m68k_cpu_do_interrupt(CPUState *cpu); bool m68k_cpu_exec_interrupt(CPUState *cpu, int int_req); #endif /* !CONFIG_USER_ONLY */ void m68k_cpu_dump_state(CPUState *cpu, FILE *f, int flags); hwaddr m68k_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); int m68k_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); int m68k_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); void m68k_tcg_init(void); void m68k_cpu_init_gdb(M68kCPU *cpu); uint32_t cpu_m68k_get_ccr(CPUM68KState *env); void cpu_m68k_set_ccr(CPUM68KState *env, uint32_t); void cpu_m68k_set_sr(CPUM68KState *env, uint32_t); void cpu_m68k_restore_fp_status(CPUM68KState *env); void cpu_m68k_set_fpcr(CPUM68KState *env, uint32_t val); /* * Instead of computing the condition codes after each m68k instruction, * QEMU just stores one operand (called CC_SRC), the result * (called CC_DEST) and the type of operation (called CC_OP). When the * condition codes are needed, the condition codes can be calculated * using this information. Condition codes are not generated if they * are only needed for conditional branches. */ typedef enum { /* Translator only -- use env->cc_op. */ CC_OP_DYNAMIC, /* Each flag bit computed into cc_[xcnvz]. */ CC_OP_FLAGS, /* X in cc_x, C = X, N in cc_n, Z in cc_n, V via cc_n/cc_v. */ CC_OP_ADDB, CC_OP_ADDW, CC_OP_ADDL, CC_OP_SUBB, CC_OP_SUBW, CC_OP_SUBL, /* X in cc_x, {N,Z,C,V} via cc_n/cc_v. */ CC_OP_CMPB, CC_OP_CMPW, CC_OP_CMPL, /* X in cc_x, C = 0, V = 0, N in cc_n, Z in cc_n. */ CC_OP_LOGIC, CC_OP_NB } CCOp; #define CCF_C 0x01 #define CCF_V 0x02 #define CCF_Z 0x04 #define CCF_N 0x08 #define CCF_X 0x10 #define SR_I_SHIFT 8 #define SR_I 0x0700 #define SR_M 0x1000 #define SR_S 0x2000 #define SR_T_SHIFT 14 #define SR_T 0xc000 #define M68K_SR_TRACE(sr) ((sr & SR_T) >> SR_T_SHIFT) #define M68K_SR_TRACE_ANY_INS 0x2 #define M68K_SSP 0 #define M68K_USP 1 #define M68K_ISP 2 /* bits for 68040 special status word */ #define M68K_CP_040 0x8000 #define M68K_CU_040 0x4000 #define M68K_CT_040 0x2000 #define M68K_CM_040 0x1000 #define M68K_MA_040 0x0800 #define M68K_ATC_040 0x0400 #define M68K_LK_040 0x0200 #define M68K_RW_040 0x0100 #define M68K_SIZ_040 0x0060 #define M68K_TT_040 0x0018 #define M68K_TM_040 0x0007 #define M68K_TM_040_DATA 0x0001 #define M68K_TM_040_CODE 0x0002 #define M68K_TM_040_SUPER 0x0004 /* bits for 68040 write back status word */ #define M68K_WBV_040 0x80 #define M68K_WBSIZ_040 0x60 #define M68K_WBBYT_040 0x20 #define M68K_WBWRD_040 0x40 #define M68K_WBLNG_040 0x00 #define M68K_WBTT_040 0x18 #define M68K_WBTM_040 0x07 /* bus access size codes */ #define M68K_BA_SIZE_MASK 0x60 #define M68K_BA_SIZE_BYTE 0x20 #define M68K_BA_SIZE_WORD 0x40 #define M68K_BA_SIZE_LONG 0x00 #define M68K_BA_SIZE_LINE 0x60 /* bus access transfer type codes */ #define M68K_BA_TT_MOVE16 0x08 /* bits for 68040 MMU status register (mmusr) */ #define M68K_MMU_B_040 0x0800 #define M68K_MMU_G_040 0x0400 #define M68K_MMU_U1_040 0x0200 #define M68K_MMU_U0_040 0x0100 #define M68K_MMU_S_040 0x0080 #define M68K_MMU_CM_040 0x0060 #define M68K_MMU_M_040 0x0010 #define M68K_MMU_WP_040 0x0004 #define M68K_MMU_T_040 0x0002 #define M68K_MMU_R_040 0x0001 #define M68K_MMU_SR_MASK_040 (M68K_MMU_G_040 | M68K_MMU_U1_040 | \ M68K_MMU_U0_040 | M68K_MMU_S_040 | \ M68K_MMU_CM_040 | M68K_MMU_M_040 | \ M68K_MMU_WP_040) /* bits for 68040 MMU Translation Control Register */ #define M68K_TCR_ENABLED 0x8000 #define M68K_TCR_PAGE_8K 0x4000 /* bits for 68040 MMU Table Descriptor / Page Descriptor / TTR */ #define M68K_DESC_WRITEPROT 0x00000004 #define M68K_DESC_USED 0x00000008 #define M68K_DESC_MODIFIED 0x00000010 #define M68K_DESC_CACHEMODE 0x00000060 #define M68K_DESC_CM_WRTHRU 0x00000000 #define M68K_DESC_CM_COPYBK 0x00000020 #define M68K_DESC_CM_SERIAL 0x00000040 #define M68K_DESC_CM_NCACHE 0x00000060 #define M68K_DESC_SUPERONLY 0x00000080 #define M68K_DESC_USERATTR 0x00000300 #define M68K_DESC_USERATTR_SHIFT 8 #define M68K_DESC_GLOBAL 0x00000400 #define M68K_DESC_URESERVED 0x00000800 #define M68K_ROOT_POINTER_ENTRIES 128 #define M68K_4K_PAGE_MASK (~0xff) #define M68K_POINTER_BASE(entry) (entry & ~0x1ff) #define M68K_ROOT_INDEX(addr) ((address >> 23) & 0x1fc) #define M68K_POINTER_INDEX(addr) ((address >> 16) & 0x1fc) #define M68K_4K_PAGE_BASE(entry) (next & M68K_4K_PAGE_MASK) #define M68K_4K_PAGE_INDEX(addr) ((address >> 10) & 0xfc) #define M68K_8K_PAGE_MASK (~0x7f) #define M68K_8K_PAGE_BASE(entry) (next & M68K_8K_PAGE_MASK) #define M68K_8K_PAGE_INDEX(addr) ((address >> 11) & 0x7c) #define M68K_UDT_VALID(entry) (entry & 2) #define M68K_PDT_VALID(entry) (entry & 3) #define M68K_PDT_INDIRECT(entry) ((entry & 3) == 2) #define M68K_INDIRECT_POINTER(addr) (addr & ~3) #define M68K_TTS_POINTER_SHIFT 18 #define M68K_TTS_ROOT_SHIFT 25 /* bits for 68040 MMU Transparent Translation Registers */ #define M68K_TTR_ADDR_BASE 0xff000000 #define M68K_TTR_ADDR_MASK 0x00ff0000 #define M68K_TTR_ADDR_MASK_SHIFT 8 #define M68K_TTR_ENABLED 0x00008000 #define M68K_TTR_SFIELD 0x00006000 #define M68K_TTR_SFIELD_USER 0x0000 #define M68K_TTR_SFIELD_SUPER 0x2000 /* m68k Control Registers */ /* ColdFire */ /* Memory Management Control Registers */ #define M68K_CR_ASID 0x003 #define M68K_CR_ACR0 0x004 #define M68K_CR_ACR1 0x005 #define M68K_CR_ACR2 0x006 #define M68K_CR_ACR3 0x007 #define M68K_CR_MMUBAR 0x008 /* Processor Miscellaneous Registers */ #define M68K_CR_PC 0x80F /* Local Memory and Module Control Registers */ #define M68K_CR_ROMBAR0 0xC00 #define M68K_CR_ROMBAR1 0xC01 #define M68K_CR_RAMBAR0 0xC04 #define M68K_CR_RAMBAR1 0xC05 #define M68K_CR_MPCR 0xC0C #define M68K_CR_EDRAMBAR 0xC0D #define M68K_CR_SECMBAR 0xC0E #define M68K_CR_MBAR 0xC0F /* Local Memory Address Permutation Control Registers */ #define M68K_CR_PCR1U0 0xD02 #define M68K_CR_PCR1L0 0xD03 #define M68K_CR_PCR2U0 0xD04 #define M68K_CR_PCR2L0 0xD05 #define M68K_CR_PCR3U0 0xD06 #define M68K_CR_PCR3L0 0xD07 #define M68K_CR_PCR1U1 0xD0A #define M68K_CR_PCR1L1 0xD0B #define M68K_CR_PCR2U1 0xD0C #define M68K_CR_PCR2L1 0xD0D #define M68K_CR_PCR3U1 0xD0E #define M68K_CR_PCR3L1 0xD0F /* MC680x0 */ /* MC680[1234]0/CPU32 */ #define M68K_CR_SFC 0x000 #define M68K_CR_DFC 0x001 #define M68K_CR_USP 0x800 #define M68K_CR_VBR 0x801 /* + Coldfire */ /* MC680[234]0 */ #define M68K_CR_CACR 0x002 /* + Coldfire */ #define M68K_CR_CAAR 0x802 /* MC68020 and MC68030 only */ #define M68K_CR_MSP 0x803 #define M68K_CR_ISP 0x804 /* MC68040/MC68LC040 */ #define M68K_CR_TC 0x003 #define M68K_CR_ITT0 0x004 #define M68K_CR_ITT1 0x005 #define M68K_CR_DTT0 0x006 #define M68K_CR_DTT1 0x007 #define M68K_CR_MMUSR 0x805 #define M68K_CR_URP 0x806 #define M68K_CR_SRP 0x807 /* MC68EC040 */ #define M68K_CR_IACR0 0x004 #define M68K_CR_IACR1 0x005 #define M68K_CR_DACR0 0x006 #define M68K_CR_DACR1 0x007 /* MC68060 */ #define M68K_CR_BUSCR 0x008 #define M68K_CR_PCR 0x808 #define M68K_FPIAR_SHIFT 0 #define M68K_FPIAR (1 << M68K_FPIAR_SHIFT) #define M68K_FPSR_SHIFT 1 #define M68K_FPSR (1 << M68K_FPSR_SHIFT) #define M68K_FPCR_SHIFT 2 #define M68K_FPCR (1 << M68K_FPCR_SHIFT) /* Floating-Point Status Register */ /* Condition Code */ #define FPSR_CC_MASK 0x0f000000 #define FPSR_CC_A 0x01000000 /* Not-A-Number */ #define FPSR_CC_I 0x02000000 /* Infinity */ #define FPSR_CC_Z 0x04000000 /* Zero */ #define FPSR_CC_N 0x08000000 /* Negative */ /* Quotient */ #define FPSR_QT_MASK 0x00ff0000 #define FPSR_QT_SHIFT 16 /* Floating-Point Control Register */ /* Rounding mode */ #define FPCR_RND_MASK 0x0030 #define FPCR_RND_N 0x0000 #define FPCR_RND_Z 0x0010 #define FPCR_RND_M 0x0020 #define FPCR_RND_P 0x0030 /* Rounding precision */ #define FPCR_PREC_MASK 0x00c0 #define FPCR_PREC_X 0x0000 #define FPCR_PREC_S 0x0040 #define FPCR_PREC_D 0x0080 #define FPCR_PREC_U 0x00c0 #define FPCR_EXCP_MASK 0xff00 /* CACR fields are implementation defined, but some bits are common. */ #define M68K_CACR_EUSP 0x10 #define MACSR_PAV0 0x100 #define MACSR_OMC 0x080 #define MACSR_SU 0x040 #define MACSR_FI 0x020 #define MACSR_RT 0x010 #define MACSR_N 0x008 #define MACSR_Z 0x004 #define MACSR_V 0x002 #define MACSR_EV 0x001 void m68k_set_irq_level(M68kCPU *cpu, int level, uint8_t vector); void m68k_switch_sp(CPUM68KState *env); void do_m68k_semihosting(CPUM68KState *env, int nr); /* * The 68000 family is defined in six main CPU classes, the 680[012346]0. * Generally each successive CPU adds enhanced data/stack/instructions. * However, some features are only common to one, or a few classes. * The features covers those subsets of instructons. * * CPU32/32+ are basically 680010 compatible with some 68020 class instructons, * and some additional CPU32 instructions. Mostly Supervisor state differences. * * The ColdFire core ISA is a RISC-style reduction of the 68000 series cpu. * There are 4 ColdFire core ISA revisions: A, A+, B and C. * Each feature covers the subset of instructions common to the * ISA revisions mentioned. */ enum m68k_features { /* Base m68k instruction set */ M68K_FEATURE_M68000, M68K_FEATURE_M68010, M68K_FEATURE_M68020, M68K_FEATURE_M68030, M68K_FEATURE_M68040, M68K_FEATURE_M68060, /* Base Coldfire set Rev A. */ M68K_FEATURE_CF_ISA_A, /* (ISA B or C). */ M68K_FEATURE_CF_ISA_B, /* BIT/BITREV, FF1, STRLDSR (ISA A+ or C). */ M68K_FEATURE_CF_ISA_APLUSC, /* BRA with Long branch. (680[2346]0, ISA A+ or B). */ M68K_FEATURE_BRAL, M68K_FEATURE_CF_FPU, M68K_FEATURE_CF_MAC, M68K_FEATURE_CF_EMAC, /* Revision B EMAC (dual accumulate). */ M68K_FEATURE_CF_EMAC_B, /* User Stack Pointer. (680[012346]0, ISA A+, B or C). */ M68K_FEATURE_USP, /* Master Stack Pointer. (680[234]0) */ M68K_FEATURE_MSP, /* 68020+ full extension word. */ M68K_FEATURE_EXT_FULL, /* word sized address index registers. */ M68K_FEATURE_WORD_INDEX, /* scaled address index registers. */ M68K_FEATURE_SCALED_INDEX, /* 32 bit mul/div. (680[2346]0, and CPU32) */ M68K_FEATURE_LONG_MULDIV, /* 64 bit mul/div. (680[2346]0, and CPU32) */ M68K_FEATURE_QUAD_MULDIV, /* Bcc with Long branches. (680[2346]0, and CPU32) */ M68K_FEATURE_BCCL, /* BFxxx Bit field insns. (680[2346]0) */ M68K_FEATURE_BITFIELD, /* fpu insn. (680[46]0) */ M68K_FEATURE_FPU, /* CAS/CAS2[WL] insns. (680[2346]0) */ M68K_FEATURE_CAS, /* BKPT insn. (680[12346]0, and CPU32) */ M68K_FEATURE_BKPT, /* RTD insn. (680[12346]0, and CPU32) */ M68K_FEATURE_RTD, /* CHK2 insn. (680[2346]0, and CPU32) */ M68K_FEATURE_CHK2, /* MOVEP insn. (680[01234]0, and CPU32) */ M68K_FEATURE_MOVEP, /* MOVEC insn. (from 68010) */ M68K_FEATURE_MOVEC, /* Unaligned data accesses (680[2346]0) */ M68K_FEATURE_UNALIGNED_DATA, }; static inline int m68k_feature(CPUM68KState *env, int feature) { return (env->features & (1u << feature)) != 0; } void m68k_cpu_list(void); void register_m68k_insns (CPUM68KState *env); enum { /* 1 bit to define user level / supervisor access */ ACCESS_SUPER = 0x01, /* 1 bit to indicate direction */ ACCESS_STORE = 0x02, /* 1 bit to indicate debug access */ ACCESS_DEBUG = 0x04, /* PTEST instruction */ ACCESS_PTEST = 0x08, /* Type of instruction that generated the access */ ACCESS_CODE = 0x10, /* Code fetch access */ ACCESS_DATA = 0x20, /* Data load/store access */ }; #define M68K_CPU_TYPE_SUFFIX "-" TYPE_M68K_CPU #define M68K_CPU_TYPE_NAME(model) model M68K_CPU_TYPE_SUFFIX #define CPU_RESOLVING_TYPE TYPE_M68K_CPU #define cpu_list m68k_cpu_list /* MMU modes definitions */ #define MMU_KERNEL_IDX 0 #define MMU_USER_IDX 1 static inline int cpu_mmu_index (CPUM68KState *env, bool ifetch) { return (env->sr & SR_S) == 0 ? 1 : 0; } bool m68k_cpu_tlb_fill(CPUState *cs, vaddr address, int size, MMUAccessType access_type, int mmu_idx, bool probe, uintptr_t retaddr); void m68k_cpu_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr, unsigned size, MMUAccessType access_type, int mmu_idx, MemTxAttrs attrs, MemTxResult response, uintptr_t retaddr); #include "exec/cpu-all.h" /* TB flags */ #define TB_FLAGS_MACSR 0x0f #define TB_FLAGS_MSR_S_BIT 13 #define TB_FLAGS_MSR_S (1 << TB_FLAGS_MSR_S_BIT) #define TB_FLAGS_SFC_S_BIT 14 #define TB_FLAGS_SFC_S (1 << TB_FLAGS_SFC_S_BIT) #define TB_FLAGS_DFC_S_BIT 15 #define TB_FLAGS_DFC_S (1 << TB_FLAGS_DFC_S_BIT) #define TB_FLAGS_TRACE 16 #define TB_FLAGS_TRACE_BIT (1 << TB_FLAGS_TRACE) static inline void cpu_get_tb_cpu_state(CPUM68KState *env, target_ulong *pc, target_ulong *cs_base, uint32_t *flags) { *pc = env->pc; *cs_base = 0; *flags = (env->macsr >> 4) & TB_FLAGS_MACSR; if (env->sr & SR_S) { *flags |= TB_FLAGS_MSR_S; *flags |= (env->sfc << (TB_FLAGS_SFC_S_BIT - 2)) & TB_FLAGS_SFC_S; *flags |= (env->dfc << (TB_FLAGS_DFC_S_BIT - 2)) & TB_FLAGS_DFC_S; } if (M68K_SR_TRACE(env->sr) == M68K_SR_TRACE_ANY_INS) { *flags |= TB_FLAGS_TRACE; } } void dump_mmu(CPUM68KState *env); #endif