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143 lines
4.7 KiB
C
143 lines
4.7 KiB
C
//
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// vr4300/cpu.h: VR4300 processor container.
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//
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// CEN64: Cycle-Accurate Nintendo 64 Emulator.
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// Copyright (C) 2015, Tyler J. Stachecki.
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//
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// This file is subject to the terms and conditions defined in
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// 'LICENSE', which is part of this source code package.
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//
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#ifndef __vr4300_cpu_h__
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#define __vr4300_cpu_h__
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#include "common.h"
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#include "vr4300/cp0.h"
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#include "vr4300/cp1.h"
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#include "vr4300/dcache.h"
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#include "vr4300/icache.h"
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#include "vr4300/opcodes.h"
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#include "vr4300/pipeline.h"
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struct bus_controller;
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enum vr4300_signals {
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VR4300_SIGNAL_FORCEEXIT = 0x000000001,
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VR4300_SIGNAL_COLDRESET = 0x000000002,
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};
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enum vr4300_register {
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VR4300_REGISTER_R0, VR4300_REGISTER_AT, VR4300_REGISTER_V0,
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VR4300_REGISTER_V1, VR4300_REGISTER_A0, VR4300_REGISTER_A1,
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VR4300_REGISTER_A2, VR4300_REGISTER_A3, VR4300_REGISTER_T0,
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VR4300_REGISTER_T1, VR4300_REGISTER_T2, VR4300_REGISTER_T3,
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VR4300_REGISTER_T4, VR4300_REGISTER_T5, VR4300_REGISTER_T6,
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VR4300_REGISTER_T7, VR4300_REGISTER_S0, VR4300_REGISTER_S1,
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VR4300_REGISTER_S2, VR4300_REGISTER_S3, VR4300_REGISTER_S4,
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VR4300_REGISTER_S5, VR4300_REGISTER_S6, VR4300_REGISTER_S7,
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VR4300_REGISTER_T8, VR4300_REGISTER_T9, VR4300_REGISTER_K0,
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VR4300_REGISTER_K1, VR4300_REGISTER_GP, VR4300_REGISTER_SP,
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VR4300_REGISTER_FP, VR4300_REGISTER_RA,
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// CP0 registers.
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VR4300_REGISTER_CP0_0, VR4300_REGISTER_CP0_1, VR4300_REGISTER_CP0_2,
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VR4300_REGISTER_CP0_3, VR4300_REGISTER_CP0_4, VR4300_REGISTER_CP0_5,
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VR4300_REGISTER_CP0_6, VR4300_REGISTER_CP0_7, VR4300_REGISTER_CP0_8,
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VR4300_REGISTER_CP0_9, VR4300_REGISTER_CP0_10, VR4300_REGISTER_CP0_11,
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VR4300_REGISTER_CP0_12, VR4300_REGISTER_CP0_13, VR4300_REGISTER_CP0_14,
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VR4300_REGISTER_CP0_15, VR4300_REGISTER_CP0_16, VR4300_REGISTER_CP0_17,
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VR4300_REGISTER_CP0_18, VR4300_REGISTER_CP0_19, VR4300_REGISTER_CP0_20,
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VR4300_REGISTER_CP0_21, VR4300_REGISTER_CP0_22, VR4300_REGISTER_CP0_23,
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VR4300_REGISTER_CP0_24, VR4300_REGISTER_CP0_25, VR4300_REGISTER_CP0_26,
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VR4300_REGISTER_CP0_27, VR4300_REGISTER_CP0_28, VR4300_REGISTER_CP0_29,
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VR4300_REGISTER_CP0_30, VR4300_REGISTER_CP0_31,
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// CP1 registers.
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VR4300_REGISTER_CP1_0, VR4300_REGISTER_CP1_1, VR4300_REGISTER_CP1_2,
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VR4300_REGISTER_CP1_3, VR4300_REGISTER_CP1_4, VR4300_REGISTER_CP1_5,
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VR4300_REGISTER_CP1_6, VR4300_REGISTER_CP1_7, VR4300_REGISTER_CP1_8,
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VR4300_REGISTER_CP1_9, VR4300_REGISTER_CP1_10, VR4300_REGISTER_CP1_11,
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VR4300_REGISTER_CP1_12, VR4300_REGISTER_CP1_13, VR4300_REGISTER_CP1_14,
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VR4300_REGISTER_CP1_15, VR4300_REGISTER_CP1_16, VR4300_REGISTER_CP1_17,
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VR4300_REGISTER_CP1_18, VR4300_REGISTER_CP1_19, VR4300_REGISTER_CP1_20,
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VR4300_REGISTER_CP1_21, VR4300_REGISTER_CP1_22, VR4300_REGISTER_CP1_23,
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VR4300_REGISTER_CP1_24, VR4300_REGISTER_CP1_25, VR4300_REGISTER_CP1_26,
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VR4300_REGISTER_CP1_27, VR4300_REGISTER_CP1_28, VR4300_REGISTER_CP1_29,
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VR4300_REGISTER_CP1_30, VR4300_REGISTER_CP1_31,
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// Miscellanious registers.
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VR4300_REGISTER_HI, VR4300_REGISTER_LO,
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VR4300_CP1_FCR0, VR4300_CP1_FCR31,
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// Pipeline cycle type flag.
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//
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// Putting these here along with the other registers allows us to
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// correctly (and cheaply) detect that a busy-wait loop instruction
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// is retiring.
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PIPELINE_CYCLE_TYPE,
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NUM_VR4300_REGISTERS
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};
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enum mi_register {
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#define X(reg) reg,
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#include "vr4300/registers.md"
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#undef X
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NUM_MI_REGISTERS,
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};
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#ifdef DEBUG_MMIO_REGISTER_ACCESS
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extern const char *mi_register_mnemonics[NUM_MI_REGISTERS];
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#endif
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struct vr4300 {
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struct bus_controller *bus;
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struct vr4300_pipeline pipeline;
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uint64_t regs[NUM_VR4300_REGISTERS];
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uint32_t mi_regs[NUM_MI_REGISTERS];
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unsigned signals;
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struct vr4300_cp0 cp0;
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struct vr4300_dcache dcache;
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struct vr4300_icache icache;
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uint64_t *profile_samples;
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};
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struct vr4300_stats {
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unsigned long executed_instructions;
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unsigned long total_cycles;
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unsigned long opcode_counts[NUM_VR4300_OPCODES];
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};
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cen64_cold int vr4300_init(struct vr4300 *vr4300, struct bus_controller *bus, bool profiling);
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cen64_cold void vr4300_print_summary(struct vr4300_stats *stats);
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cen64_flatten cen64_hot void vr4300_cycle_(struct vr4300 *vr4300);
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cen64_flatten cen64_hot static inline void vr4300_cycle(struct vr4300 *vr4300) {
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struct vr4300_pipeline *pipeline = &vr4300->pipeline;
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// Increment counters.
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vr4300->regs[VR4300_CP0_REGISTER_COUNT]++;
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if ((uint32_t) (vr4300->regs[VR4300_CP0_REGISTER_COUNT] >> 1) ==
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(uint32_t) vr4300->regs[VR4300_CP0_REGISTER_COMPARE])
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vr4300->regs[VR4300_CP0_REGISTER_CAUSE] |= 0x8000;
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// We're stalling for something...
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if (pipeline->cycles_to_stall > 0)
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pipeline->cycles_to_stall--;
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else
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vr4300_cycle_(vr4300);
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}
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cen64_cold void vr4300_cycle_extra(struct vr4300 *vr4300, struct vr4300_stats *stats);
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#endif
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