808d77bc5f
Altering all comments in target/m68k to match Qemu coding styles so that future patches wont fail due to style breaches. Signed-off-by: Lucien Murray-Pitts <lucienmp.qemu@gmail.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20190606234125.GA4830@localhost.localdomain> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
566 lines
17 KiB
C
566 lines
17 KiB
C
/*
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* m68k virtual CPU header
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*
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* Copyright (c) 2005-2007 CodeSourcery
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* Written by Paul Brook
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef M68K_CPU_H
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#define M68K_CPU_H
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#include "exec/cpu-defs.h"
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#include "cpu-qom.h"
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#define OS_BYTE 0
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#define OS_WORD 1
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#define OS_LONG 2
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#define OS_SINGLE 3
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#define OS_DOUBLE 4
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#define OS_EXTENDED 5
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#define OS_PACKED 6
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#define OS_UNSIZED 7
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#define MAX_QREGS 32
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#define EXCP_ACCESS 2 /* Access (MMU) error. */
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#define EXCP_ADDRESS 3 /* Address error. */
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#define EXCP_ILLEGAL 4 /* Illegal instruction. */
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#define EXCP_DIV0 5 /* Divide by zero */
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#define EXCP_CHK 6 /* CHK, CHK2 Instructions */
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#define EXCP_TRAPCC 7 /* FTRAPcc, TRAPcc, TRAPV Instructions */
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#define EXCP_PRIVILEGE 8 /* Privilege violation. */
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#define EXCP_TRACE 9
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#define EXCP_LINEA 10 /* Unimplemented line-A (MAC) opcode. */
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#define EXCP_LINEF 11 /* Unimplemented line-F (FPU) opcode. */
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#define EXCP_DEBUGNBP 12 /* Non-breakpoint debug interrupt. */
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#define EXCP_DEBEGBP 13 /* Breakpoint debug interrupt. */
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#define EXCP_FORMAT 14 /* RTE format error. */
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#define EXCP_UNINITIALIZED 15
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#define EXCP_SPURIOUS 24 /* Spurious interrupt */
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#define EXCP_INT_LEVEL_1 25 /* Level 1 Interrupt autovector */
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#define EXCP_INT_LEVEL_7 31 /* Level 7 Interrupt autovector */
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#define EXCP_TRAP0 32 /* User trap #0. */
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#define EXCP_TRAP15 47 /* User trap #15. */
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#define EXCP_FP_BSUN 48 /* Branch Set on Unordered */
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#define EXCP_FP_INEX 49 /* Inexact result */
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#define EXCP_FP_DZ 50 /* Divide by Zero */
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#define EXCP_FP_UNFL 51 /* Underflow */
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#define EXCP_FP_OPERR 52 /* Operand Error */
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#define EXCP_FP_OVFL 53 /* Overflow */
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#define EXCP_FP_SNAN 54 /* Signaling Not-A-Number */
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#define EXCP_FP_UNIMP 55 /* Unimplemented Data type */
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#define EXCP_MMU_CONF 56 /* MMU Configuration Error */
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#define EXCP_MMU_ILLEGAL 57 /* MMU Illegal Operation Error */
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#define EXCP_MMU_ACCESS 58 /* MMU Access Level Violation Error */
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#define EXCP_RTE 0x100
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#define EXCP_HALT_INSN 0x101
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#define M68K_DTTR0 0
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#define M68K_DTTR1 1
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#define M68K_ITTR0 2
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#define M68K_ITTR1 3
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#define M68K_MAX_TTR 2
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#define TTR(type, index) ttr[((type & ACCESS_CODE) == ACCESS_CODE) * 2 + index]
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#define TARGET_INSN_START_EXTRA_WORDS 1
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typedef CPU_LDoubleU FPReg;
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typedef struct CPUM68KState {
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uint32_t dregs[8];
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uint32_t aregs[8];
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uint32_t pc;
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uint32_t sr;
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/* SSP and USP. The current_sp is stored in aregs[7], the other here. */
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int current_sp;
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uint32_t sp[3];
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/* Condition flags. */
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uint32_t cc_op;
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uint32_t cc_x; /* always 0/1 */
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uint32_t cc_n; /* in bit 31 (i.e. negative) */
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uint32_t cc_v; /* in bit 31, unused, or computed from cc_n and cc_v */
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uint32_t cc_c; /* either 0/1, unused, or computed from cc_n and cc_v */
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uint32_t cc_z; /* == 0 or unused */
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FPReg fregs[8];
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FPReg fp_result;
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uint32_t fpcr;
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uint32_t fpsr;
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float_status fp_status;
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uint64_t mactmp;
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/*
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* EMAC Hardware deals with 48-bit values composed of one 32-bit and
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* two 8-bit parts. We store a single 64-bit value and
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* rearrange/extend this when changing modes.
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*/
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uint64_t macc[4];
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uint32_t macsr;
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uint32_t mac_mask;
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/* MMU status. */
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struct {
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uint32_t ar;
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uint32_t ssw;
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/* 68040 */
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uint16_t tcr;
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uint32_t urp;
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uint32_t srp;
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bool fault;
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uint32_t ttr[4];
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uint32_t mmusr;
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} mmu;
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/* Control registers. */
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uint32_t vbr;
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uint32_t mbar;
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uint32_t rambar0;
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uint32_t cacr;
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uint32_t sfc;
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uint32_t dfc;
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int pending_vector;
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int pending_level;
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uint32_t qregs[MAX_QREGS];
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/* Fields up to this point are cleared by a CPU reset */
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struct {} end_reset_fields;
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/* Fields from here on are preserved across CPU reset. */
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uint32_t features;
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} CPUM68KState;
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/*
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* M68kCPU:
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* @env: #CPUM68KState
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*
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* A Motorola 68k CPU.
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*/
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struct M68kCPU {
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/*< private >*/
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CPUState parent_obj;
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/*< public >*/
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CPUNegativeOffsetState neg;
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CPUM68KState env;
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};
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void m68k_cpu_do_interrupt(CPUState *cpu);
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bool m68k_cpu_exec_interrupt(CPUState *cpu, int int_req);
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void m68k_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
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hwaddr m68k_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
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int m68k_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
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int m68k_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
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void m68k_tcg_init(void);
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void m68k_cpu_init_gdb(M68kCPU *cpu);
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/*
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* you can call this signal handler from your SIGBUS and SIGSEGV
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* signal handlers to inform the virtual CPU of exceptions. non zero
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* is returned if the signal was handled by the virtual CPU.
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*/
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int cpu_m68k_signal_handler(int host_signum, void *pinfo,
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void *puc);
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uint32_t cpu_m68k_get_ccr(CPUM68KState *env);
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void cpu_m68k_set_ccr(CPUM68KState *env, uint32_t);
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void cpu_m68k_set_sr(CPUM68KState *env, uint32_t);
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void cpu_m68k_set_fpcr(CPUM68KState *env, uint32_t val);
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/*
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* Instead of computing the condition codes after each m68k instruction,
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* QEMU just stores one operand (called CC_SRC), the result
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* (called CC_DEST) and the type of operation (called CC_OP). When the
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* condition codes are needed, the condition codes can be calculated
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* using this information. Condition codes are not generated if they
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* are only needed for conditional branches.
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*/
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typedef enum {
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/* Translator only -- use env->cc_op. */
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CC_OP_DYNAMIC,
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/* Each flag bit computed into cc_[xcnvz]. */
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CC_OP_FLAGS,
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/* X in cc_x, C = X, N in cc_n, Z in cc_n, V via cc_n/cc_v. */
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CC_OP_ADDB, CC_OP_ADDW, CC_OP_ADDL,
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CC_OP_SUBB, CC_OP_SUBW, CC_OP_SUBL,
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/* X in cc_x, {N,Z,C,V} via cc_n/cc_v. */
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CC_OP_CMPB, CC_OP_CMPW, CC_OP_CMPL,
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/* X in cc_x, C = 0, V = 0, N in cc_n, Z in cc_n. */
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CC_OP_LOGIC,
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CC_OP_NB
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} CCOp;
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#define CCF_C 0x01
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#define CCF_V 0x02
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#define CCF_Z 0x04
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#define CCF_N 0x08
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#define CCF_X 0x10
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#define SR_I_SHIFT 8
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#define SR_I 0x0700
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#define SR_M 0x1000
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#define SR_S 0x2000
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#define SR_T_SHIFT 14
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#define SR_T 0xc000
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#define M68K_SSP 0
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#define M68K_USP 1
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#define M68K_ISP 2
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/* bits for 68040 special status word */
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#define M68K_CP_040 0x8000
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#define M68K_CU_040 0x4000
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#define M68K_CT_040 0x2000
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#define M68K_CM_040 0x1000
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#define M68K_MA_040 0x0800
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#define M68K_ATC_040 0x0400
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#define M68K_LK_040 0x0200
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#define M68K_RW_040 0x0100
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#define M68K_SIZ_040 0x0060
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#define M68K_TT_040 0x0018
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#define M68K_TM_040 0x0007
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#define M68K_TM_040_DATA 0x0001
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#define M68K_TM_040_CODE 0x0002
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#define M68K_TM_040_SUPER 0x0004
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/* bits for 68040 write back status word */
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#define M68K_WBV_040 0x80
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#define M68K_WBSIZ_040 0x60
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#define M68K_WBBYT_040 0x20
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#define M68K_WBWRD_040 0x40
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#define M68K_WBLNG_040 0x00
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#define M68K_WBTT_040 0x18
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#define M68K_WBTM_040 0x07
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/* bus access size codes */
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#define M68K_BA_SIZE_MASK 0x60
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#define M68K_BA_SIZE_BYTE 0x20
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#define M68K_BA_SIZE_WORD 0x40
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#define M68K_BA_SIZE_LONG 0x00
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#define M68K_BA_SIZE_LINE 0x60
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/* bus access transfer type codes */
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#define M68K_BA_TT_MOVE16 0x08
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/* bits for 68040 MMU status register (mmusr) */
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#define M68K_MMU_B_040 0x0800
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#define M68K_MMU_G_040 0x0400
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#define M68K_MMU_U1_040 0x0200
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#define M68K_MMU_U0_040 0x0100
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#define M68K_MMU_S_040 0x0080
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#define M68K_MMU_CM_040 0x0060
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#define M68K_MMU_M_040 0x0010
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#define M68K_MMU_WP_040 0x0004
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#define M68K_MMU_T_040 0x0002
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#define M68K_MMU_R_040 0x0001
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#define M68K_MMU_SR_MASK_040 (M68K_MMU_G_040 | M68K_MMU_U1_040 | \
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M68K_MMU_U0_040 | M68K_MMU_S_040 | \
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M68K_MMU_CM_040 | M68K_MMU_M_040 | \
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M68K_MMU_WP_040)
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/* bits for 68040 MMU Translation Control Register */
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#define M68K_TCR_ENABLED 0x8000
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#define M68K_TCR_PAGE_8K 0x4000
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/* bits for 68040 MMU Table Descriptor / Page Descriptor / TTR */
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#define M68K_DESC_WRITEPROT 0x00000004
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#define M68K_DESC_USED 0x00000008
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#define M68K_DESC_MODIFIED 0x00000010
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#define M68K_DESC_CACHEMODE 0x00000060
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#define M68K_DESC_CM_WRTHRU 0x00000000
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#define M68K_DESC_CM_COPYBK 0x00000020
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#define M68K_DESC_CM_SERIAL 0x00000040
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#define M68K_DESC_CM_NCACHE 0x00000060
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#define M68K_DESC_SUPERONLY 0x00000080
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#define M68K_DESC_USERATTR 0x00000300
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#define M68K_DESC_USERATTR_SHIFT 8
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#define M68K_DESC_GLOBAL 0x00000400
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#define M68K_DESC_URESERVED 0x00000800
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#define M68K_ROOT_POINTER_ENTRIES 128
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#define M68K_4K_PAGE_MASK (~0xff)
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#define M68K_POINTER_BASE(entry) (entry & ~0x1ff)
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#define M68K_ROOT_INDEX(addr) ((address >> 23) & 0x1fc)
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#define M68K_POINTER_INDEX(addr) ((address >> 16) & 0x1fc)
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#define M68K_4K_PAGE_BASE(entry) (next & M68K_4K_PAGE_MASK)
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#define M68K_4K_PAGE_INDEX(addr) ((address >> 10) & 0xfc)
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#define M68K_8K_PAGE_MASK (~0x7f)
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#define M68K_8K_PAGE_BASE(entry) (next & M68K_8K_PAGE_MASK)
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#define M68K_8K_PAGE_INDEX(addr) ((address >> 11) & 0x7c)
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#define M68K_UDT_VALID(entry) (entry & 2)
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#define M68K_PDT_VALID(entry) (entry & 3)
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#define M68K_PDT_INDIRECT(entry) ((entry & 3) == 2)
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#define M68K_INDIRECT_POINTER(addr) (addr & ~3)
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#define M68K_TTS_POINTER_SHIFT 18
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#define M68K_TTS_ROOT_SHIFT 25
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/* bits for 68040 MMU Transparent Translation Registers */
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#define M68K_TTR_ADDR_BASE 0xff000000
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#define M68K_TTR_ADDR_MASK 0x00ff0000
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#define M68K_TTR_ADDR_MASK_SHIFT 8
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#define M68K_TTR_ENABLED 0x00008000
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#define M68K_TTR_SFIELD 0x00006000
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#define M68K_TTR_SFIELD_USER 0x0000
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#define M68K_TTR_SFIELD_SUPER 0x2000
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/* m68k Control Registers */
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/* ColdFire */
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/* Memory Management Control Registers */
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#define M68K_CR_ASID 0x003
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#define M68K_CR_ACR0 0x004
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#define M68K_CR_ACR1 0x005
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#define M68K_CR_ACR2 0x006
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#define M68K_CR_ACR3 0x007
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#define M68K_CR_MMUBAR 0x008
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/* Processor Miscellaneous Registers */
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#define M68K_CR_PC 0x80F
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/* Local Memory and Module Control Registers */
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#define M68K_CR_ROMBAR0 0xC00
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#define M68K_CR_ROMBAR1 0xC01
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#define M68K_CR_RAMBAR0 0xC04
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#define M68K_CR_RAMBAR1 0xC05
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#define M68K_CR_MPCR 0xC0C
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#define M68K_CR_EDRAMBAR 0xC0D
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#define M68K_CR_SECMBAR 0xC0E
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#define M68K_CR_MBAR 0xC0F
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/* Local Memory Address Permutation Control Registers */
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#define M68K_CR_PCR1U0 0xD02
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#define M68K_CR_PCR1L0 0xD03
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#define M68K_CR_PCR2U0 0xD04
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#define M68K_CR_PCR2L0 0xD05
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#define M68K_CR_PCR3U0 0xD06
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#define M68K_CR_PCR3L0 0xD07
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#define M68K_CR_PCR1U1 0xD0A
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#define M68K_CR_PCR1L1 0xD0B
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#define M68K_CR_PCR2U1 0xD0C
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#define M68K_CR_PCR2L1 0xD0D
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#define M68K_CR_PCR3U1 0xD0E
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#define M68K_CR_PCR3L1 0xD0F
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/* MC680x0 */
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/* MC680[1234]0/CPU32 */
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#define M68K_CR_SFC 0x000
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#define M68K_CR_DFC 0x001
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#define M68K_CR_USP 0x800
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#define M68K_CR_VBR 0x801 /* + Coldfire */
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/* MC680[234]0 */
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#define M68K_CR_CACR 0x002 /* + Coldfire */
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#define M68K_CR_CAAR 0x802 /* MC68020 and MC68030 only */
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#define M68K_CR_MSP 0x803
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#define M68K_CR_ISP 0x804
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/* MC68040/MC68LC040 */
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#define M68K_CR_TC 0x003
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#define M68K_CR_ITT0 0x004
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#define M68K_CR_ITT1 0x005
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#define M68K_CR_DTT0 0x006
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#define M68K_CR_DTT1 0x007
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#define M68K_CR_MMUSR 0x805
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#define M68K_CR_URP 0x806
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#define M68K_CR_SRP 0x807
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/* MC68EC040 */
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#define M68K_CR_IACR0 0x004
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#define M68K_CR_IACR1 0x005
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#define M68K_CR_DACR0 0x006
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#define M68K_CR_DACR1 0x007
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#define M68K_FPIAR_SHIFT 0
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#define M68K_FPIAR (1 << M68K_FPIAR_SHIFT)
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#define M68K_FPSR_SHIFT 1
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#define M68K_FPSR (1 << M68K_FPSR_SHIFT)
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#define M68K_FPCR_SHIFT 2
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#define M68K_FPCR (1 << M68K_FPCR_SHIFT)
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/* Floating-Point Status Register */
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/* Condition Code */
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#define FPSR_CC_MASK 0x0f000000
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#define FPSR_CC_A 0x01000000 /* Not-A-Number */
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#define FPSR_CC_I 0x02000000 /* Infinity */
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#define FPSR_CC_Z 0x04000000 /* Zero */
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#define FPSR_CC_N 0x08000000 /* Negative */
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/* Quotient */
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#define FPSR_QT_MASK 0x00ff0000
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#define FPSR_QT_SHIFT 16
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/* Floating-Point Control Register */
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/* Rounding mode */
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#define FPCR_RND_MASK 0x0030
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#define FPCR_RND_N 0x0000
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#define FPCR_RND_Z 0x0010
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#define FPCR_RND_M 0x0020
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#define FPCR_RND_P 0x0030
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/* Rounding precision */
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#define FPCR_PREC_MASK 0x00c0
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#define FPCR_PREC_X 0x0000
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#define FPCR_PREC_S 0x0040
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#define FPCR_PREC_D 0x0080
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#define FPCR_PREC_U 0x00c0
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#define FPCR_EXCP_MASK 0xff00
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/* CACR fields are implementation defined, but some bits are common. */
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#define M68K_CACR_EUSP 0x10
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#define MACSR_PAV0 0x100
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#define MACSR_OMC 0x080
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#define MACSR_SU 0x040
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#define MACSR_FI 0x020
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#define MACSR_RT 0x010
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#define MACSR_N 0x008
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#define MACSR_Z 0x004
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#define MACSR_V 0x002
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#define MACSR_EV 0x001
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void m68k_set_irq_level(M68kCPU *cpu, int level, uint8_t vector);
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void m68k_switch_sp(CPUM68KState *env);
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void do_m68k_semihosting(CPUM68KState *env, int nr);
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|
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/*
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* There are 4 ColdFire core ISA revisions: A, A+, B and C.
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* Each feature covers the subset of instructions common to the
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* ISA revisions mentioned.
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*/
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|
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enum m68k_features {
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M68K_FEATURE_M68000,
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M68K_FEATURE_CF_ISA_A,
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M68K_FEATURE_CF_ISA_B, /* (ISA B or C). */
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M68K_FEATURE_CF_ISA_APLUSC, /* BIT/BITREV, FF1, STRLDSR (ISA A+ or C). */
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M68K_FEATURE_BRAL, /* Long unconditional branch. (ISA A+ or B). */
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|
M68K_FEATURE_CF_FPU,
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M68K_FEATURE_CF_MAC,
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M68K_FEATURE_CF_EMAC,
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M68K_FEATURE_CF_EMAC_B, /* Revision B EMAC (dual accumulate). */
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M68K_FEATURE_USP, /* User Stack Pointer. (ISA A+, B or C). */
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M68K_FEATURE_EXT_FULL, /* 68020+ full extension word. */
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M68K_FEATURE_WORD_INDEX, /* word sized address index registers. */
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M68K_FEATURE_SCALED_INDEX, /* scaled address index registers. */
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M68K_FEATURE_LONG_MULDIV, /* 32 bit multiply/divide. */
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|
M68K_FEATURE_QUAD_MULDIV, /* 64 bit multiply/divide. */
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|
M68K_FEATURE_BCCL, /* Long conditional branches. */
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|
M68K_FEATURE_BITFIELD, /* Bit field insns. */
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|
M68K_FEATURE_FPU,
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|
M68K_FEATURE_CAS,
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|
M68K_FEATURE_BKPT,
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|
M68K_FEATURE_RTD,
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|
M68K_FEATURE_CHK2,
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|
M68K_FEATURE_M68040, /* instructions specific to MC68040 */
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|
M68K_FEATURE_MOVEP,
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|
};
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|
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|
static inline int m68k_feature(CPUM68KState *env, int feature)
|
|
{
|
|
return (env->features & (1u << feature)) != 0;
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|
}
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|
|
|
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_MODE0_SUFFIX _kernel
|
|
#define MMU_MODE1_SUFFIX _user
|
|
#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
|