/*
* 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 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;
/*
* 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 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_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_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 {
M68K_FEATURE_M68000, /* Base m68k instruction set */
M68K_FEATURE_M68010,
M68K_FEATURE_M68020,
M68K_FEATURE_M68030,
M68K_FEATURE_M68040,
M68K_FEATURE_M68060,
M68K_FEATURE_CF_ISA_A, /* Base Coldfire set Rev 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, /* BRA with Long branch. (680[2346]0, 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. (680[012346]0, ISA A+, B or C).*/
M68K_FEATURE_MSP, /* Master Stack Pointer. (680[234]0) */
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 mul/div. (680[2346]0, and CPU32) */
M68K_FEATURE_QUAD_MULDIV, /* 64 bit mul/div. (680[2346]0, and CPU32) */
M68K_FEATURE_BCCL, /* Bcc with Long branches. (680[2346]0, and CPU32) */
M68K_FEATURE_BITFIELD, /* BFxxx Bit field insns. (680[2346]0) */
M68K_FEATURE_FPU, /* fpu insn. (680[46]0) */
M68K_FEATURE_CAS, /* CAS/CAS2[WL] insns. (680[2346]0) */
M68K_FEATURE_BKPT, /* BKPT insn. (680[12346]0, and CPU32) */
M68K_FEATURE_RTD, /* RTD insn. (680[12346]0, and CPU32) */
M68K_FEATURE_CHK2, /* CHK2 insn. (680[2346]0, and CPU32) */
M68K_FEATURE_MOVEP, /* MOVEP insn. (680[01234]0, and CPU32) */
M68K_FEATURE_MOVEC, /* MOVEC insn. (from 68010) */
};
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
