150 lines
2.5 KiB
Systemverilog
150 lines
2.5 KiB
Systemverilog
`ifndef CPU_PKG_SVH
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`define CPU_PKG_SVH
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package cpu_pkg;
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typedef enum logic [2:0] {
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REG8_B = 3'h00,
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REG8_C = 3'h01,
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REG8_D = 3'h02,
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REG8_E = 3'h03,
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REG8_H = 3'h04,
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REG8_L = 3'h05,
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REG8_PHL = 3'h06,
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REG8_A = 3'h07
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} reg8_t;
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typedef enum logic [1:0] {
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REG16_BC = 2'h00,
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REG16_DE = 2'h01,
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REG16_HL = 2'h02,
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REG16_SP_AF = 2'h03
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} reg16_t;
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typedef enum logic [1:0] {
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CC_NZ = 2'h00,
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CC_Z = 2'h01,
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CC_NC = 2'h02,
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CC_C = 2'h03
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} cc_t;
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typedef enum logic [2:0] {
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ALU_OP_ADD = 3'h00,
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ALU_OP_ADC = 3'h01,
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ALU_OP_SUB = 3'h02,
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ALU_OP_SBC = 3'h03,
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ALU_OP_AND = 3'h04,
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ALU_OP_XOR = 3'h05,
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ALU_OP_OR = 3'h06,
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ALU_OP_CP = 3'h07
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} alu_op_t;
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typedef enum logic [2:0] {
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SHIFT_OP_RLC = 3'h00,
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SHIFT_OP_RRC = 3'h01,
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SHIFT_OP_RL = 3'h02,
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SHIFT_OP_RR = 3'h03,
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SHIFT_OP_SLA = 3'h04,
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SHIFT_OP_SRA = 3'h05,
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SHIFT_OP_SLL = 3'h06,
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SHIFT_OP_SRL = 3'h07
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} shift_op_t;
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typedef struct packed {
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logic b;
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logic s;
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logic r;
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logic [2:0] operand;
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} bsr_op_t;
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typedef struct packed {
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logic inc;
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logic dec;
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logic dst_a;
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} incdec_op_t;
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typedef struct packed {
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logic update_a;
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logic update_f;
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logic alu_op_valid;
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alu_op_t alu_op;
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logic shift_op_valid;
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shift_op_t shift_op;
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logic bsr_op_valid;
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bsr_op_t bsr_op;
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logic incdec_op_valid;
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incdec_op_t incdec_op;
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} alu_ctrl_t;
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typedef enum {
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ADDR_SRC_PC,
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ADDR_SRC_SP,
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ADDR_SRC_REG16, // TODO reuse BUS_Q
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ADDR_SRC_REG8, // TODO reuse BUS_Q
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ADDR_SRC_OPERAND8,
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ADDR_SRC_OPERAND16,
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ADDR_SRC_BUS_P,
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ADDR_SRC_BUS_Q
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} addr_src_t;
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typedef enum {
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BUS_SRC_A,
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BUS_SRC_F,
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BUS_SRC_REG8,
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BUS_SRC_OPERAND8_H,
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BUS_SRC_OPERAND8_L,
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BUS_SRC_ALU,
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BUS_SRC_MEM,
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BUS_SRC_PC_H,
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BUS_SRC_PC_L,
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BUS_SRC_REG16_H,
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BUS_SRC_REG16_L
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} bus_src_t;
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typedef enum {
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BUS_DST_SP_H,
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BUS_DST_SP_L,
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BUS_DST_ALU,
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BUS_DST_REG8,
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BUS_DST_REG16_H,
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BUS_DST_REG16_L,
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BUS_DST_PC_H,
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BUS_DST_PC_L,
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BUS_DST_MEM
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} bus_dst_t;
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typedef struct packed {
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bus_src_t src;
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bus_dst_t dst;
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logic wen;
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} bus_ctrl_t;
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typedef enum {
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BUS16_SRC_REG16,
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BUS16_SRC_ALU16,
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BUS16_SRC_SP
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} bus16_src_t;
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typedef enum {
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BUS16_DST_REG16,
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BUS16_DST_ALU16,
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BUS16_DST_SP
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} bus16_dst_t;
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typedef struct packed {
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bus16_src_t src;
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bus16_dst_t dst;
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logic wen;
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} bus16_ctrl_t;
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typedef enum {
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PC_SRC_INC,
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PC_SRC_OPERAND8,
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PC_SRC_OPERAND16,
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PC_SRC_BUS
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} pc_src_t;
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endpackage : cpu_pkg
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`endif /*CPU_PKG_SVH */
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