target/m68k/cpu.h - qemu - Git at Google

 /*
  * 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 <http://www.gnu.org/licenses/>.
  */

 #ifndef M68K_CPU_H
 #define M68K_CPU_H

 #include "exec/cpu-defs.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 MAX_QREGS 32

 #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 CPUM68KState {
     uint32_t dregs[8];
     uint32_t aregs[8];
     uint32_t pc;
     uint32_t sr;

     /* SSP and USP.  The current_sp is stored in aregs[7], the other here.  */
     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;

     uint32_t qregs[MAX_QREGS];

     /* 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 M68kCPU {
     /*< private >*/
     CPUState parent_obj;
     /*< public >*/

     CPUNegativeOffsetState neg;
     CPUM68KState env;
 };


 void m68k_cpu_do_interrupt(CPUState *cpu);
 bool m68k_cpu_exec_interrupt(CPUState *cpu, int int_req);
 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);
 /*
  * you can call this signal handler from your SIGBUS and SIGSEGV
  * signal handlers to inform the virtual CPU of exceptions. non zero
  * is returned if the signal was handled by the virtual CPU.
  */
 int cpu_m68k_signal_handler(int host_signum, void *pinfo,
                            void *puc);
 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_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_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

 #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);

 /*
  * 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 {
     M68K_FEATURE_M68000,
     M68K_FEATURE_M68020,
     M68K_FEATURE_M68030,
     M68K_FEATURE_M68040,
     M68K_FEATURE_M68060,
     M68K_FEATURE_CF_ISA_A,
     M68K_FEATURE_CF_ISA_B, /* (ISA B or C).  */
     M68K_FEATURE_CF_ISA_APLUSC, /* BIT/BITREV, FF1, STRLDSR (ISA A+ or C).  */
     M68K_FEATURE_BRAL, /* Long unconditional branch.  (ISA A+ or B).  */
     M68K_FEATURE_CF_FPU,
     M68K_FEATURE_CF_MAC,
     M68K_FEATURE_CF_EMAC,
     M68K_FEATURE_CF_EMAC_B, /* Revision B EMAC (dual accumulate).  */
     M68K_FEATURE_USP, /* User Stack Pointer.  (ISA A+, B or C).  */
     M68K_FEATURE_EXT_FULL, /* 68020+ full extension word.  */
     M68K_FEATURE_WORD_INDEX, /* word sized address index registers.  */
     M68K_FEATURE_SCALED_INDEX, /* scaled address index registers.  */
     M68K_FEATURE_LONG_MULDIV, /* 32 bit multiply/divide. */
     M68K_FEATURE_QUAD_MULDIV, /* 64 bit multiply/divide. */
     M68K_FEATURE_BCCL, /* Long conditional branches.  */
     M68K_FEATURE_BITFIELD, /* Bit field insns.  */
     M68K_FEATURE_FPU,
     M68K_FEATURE_CAS,
     M68K_FEATURE_BKPT,
     M68K_FEATURE_RTD,
     M68K_FEATURE_CHK2,
     M68K_FEATURE_MOVEP,
 };

 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_signal_handler cpu_m68k_signal_handler
 #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);

 typedef CPUM68KState CPUArchState;
 typedef M68kCPU ArchCPU;

 #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)

 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;
     }
 }

 void dump_mmu(CPUM68KState *env);

 #endif
	/*
	* 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 <http://www.gnu.org/licenses/>.
	*/

	#ifndef M68K_CPU_H
	#define M68K_CPU_H

	#include "exec/cpu-defs.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 MAX_QREGS 32

	#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 CPUM68KState {
	uint32_t dregs[8];
	uint32_t aregs[8];
	uint32_t pc;
	uint32_t sr;

	/* SSP and USP. The current_sp is stored in aregs[7], the other here. */
	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;

	uint32_t qregs[MAX_QREGS];

	/* 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 M68kCPU {
	/< private >/
	CPUState parent_obj;
	/< public >/

	CPUNegativeOffsetState neg;
	CPUM68KState env;
	};


	void m68k_cpu_do_interrupt(CPUState *cpu);
	bool m68k_cpu_exec_interrupt(CPUState *cpu, int int_req);
	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);
	/*
	* you can call this signal handler from your SIGBUS and SIGSEGV
	* signal handlers to inform the virtual CPU of exceptions. non zero
	* is returned if the signal was handled by the virtual CPU.
	*/
	int cpu_m68k_signal_handler(int host_signum, void *pinfo,
	void *puc);
	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_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_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

	#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);

	/*
	* 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 {
	M68K_FEATURE_M68000,
	M68K_FEATURE_M68020,
	M68K_FEATURE_M68030,
	M68K_FEATURE_M68040,
	M68K_FEATURE_M68060,
	M68K_FEATURE_CF_ISA_A,
	M68K_FEATURE_CF_ISA_B, /* (ISA B or C). */
	M68K_FEATURE_CF_ISA_APLUSC, /* BIT/BITREV, FF1, STRLDSR (ISA A+ or C). */
	M68K_FEATURE_BRAL, /* Long unconditional branch. (ISA A+ or B). */
	M68K_FEATURE_CF_FPU,
	M68K_FEATURE_CF_MAC,
	M68K_FEATURE_CF_EMAC,
	M68K_FEATURE_CF_EMAC_B, /* Revision B EMAC (dual accumulate). */
	M68K_FEATURE_USP, /* User Stack Pointer. (ISA A+, B or C). */
	M68K_FEATURE_EXT_FULL, /* 68020+ full extension word. */
	M68K_FEATURE_WORD_INDEX, /* word sized address index registers. */
	M68K_FEATURE_SCALED_INDEX, /* scaled address index registers. */
	M68K_FEATURE_LONG_MULDIV, /* 32 bit multiply/divide. */
	M68K_FEATURE_QUAD_MULDIV, /* 64 bit multiply/divide. */
	M68K_FEATURE_BCCL, /* Long conditional branches. */
	M68K_FEATURE_BITFIELD, /* Bit field insns. */
	M68K_FEATURE_FPU,
	M68K_FEATURE_CAS,
	M68K_FEATURE_BKPT,
	M68K_FEATURE_RTD,
	M68K_FEATURE_CHK2,
	M68K_FEATURE_MOVEP,
	};

	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_signal_handler cpu_m68k_signal_handler
	#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);

	typedef CPUM68KState CPUArchState;
	typedef M68kCPU ArchCPU;

	#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)

	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;
	}
	}

	void dump_mmu(CPUM68KState *env);

	#endif