ct_lsu_pfu
// &ConnRule(s/_x$/[2]/); @279
// &ConnRule(s/_v$/_2/); @280
// &Instance("ct_lsu_pfu_pfb_entry","x_ct_lsu_pfu_pfb_entry_2"); @281
ct_lsu_pfu_pfb_entry x_ct_lsu_pfu_pfb_entry_2 (
.amr_wa_cancel (amr_wa_cancel ),
.cp0_lsu_icg_en (cp0_lsu_icg_en ),
.cp0_lsu_l2_st_pref_en (cp0_lsu_l2_st_pref_en ),
.cp0_lsu_pfu_mmu_dis (cp0_lsu_pfu_mmu_dis ),
.cp0_yy_clk_en (cp0_yy_clk_en ),
.cp0_yy_priv_mode (cp0_yy_priv_mode ),
.cpurst_b (cpurst_b ),
.ld_da_ldfifo_pc (ld_da_ldfifo_pc ),
.ld_da_page_sec_ff (ld_da_page_sec_ff ),
.ld_da_page_share_ff (ld_da_page_share_ff ),
.ld_da_pfu_act_dp_vld (ld_da_pfu_act_dp_vld ),
.ld_da_pfu_act_vld (ld_da_pfu_act_vld ),
.ld_da_pfu_evict_cnt_vld (ld_da_pfu_evict_cnt_vld ),
.ld_da_pfu_pf_inst_vld (ld_da_pfu_pf_inst_vld ),
.ld_da_ppfu_va (ld_da_ppfu_va ),
.ld_da_ppn_ff (ld_da_ppn_ff ),
.lsu_pfu_l1_dist_sel (lsu_pfu_l1_dist_sel ),
.lsu_pfu_l2_dist_sel (lsu_pfu_l2_dist_sel ),
.lsu_special_clk (lsu_special_clk ),
.pad_yy_icg_scan_en (pad_yy_icg_scan_en ),
.pfb_no_req_cnt_val (pfb_no_req_cnt_val ),
.pfb_timeout_cnt_val (pfb_timeout_cnt_val ),
.pfu_biu_pe_req_sel_l1 (pfu_biu_pe_req_sel_l1 ),
.pfu_dcache_pref_en (pfu_dcache_pref_en ),
.pfu_get_page_sec (pfu_get_page_sec ),
.pfu_get_page_share (pfu_get_page_share ),
.pfu_get_ppn (pfu_get_ppn ),
.pfu_get_ppn_err (pfu_get_ppn_err ),
.pfu_get_ppn_vld (pfu_get_ppn_vld ),
.pfu_l2_pref_en (pfu_l2_pref_en ),
.pfu_mmu_pe_req_sel_l1 (pfu_mmu_pe_req_sel_l1 ),
.pfu_pfb_create_pc (pfu_pfb_create_pc ),
.pfu_pfb_create_stride (pfu_pfb_create_stride ),
.pfu_pfb_create_stride_neg (pfu_pfb_create_stride_neg ),
.pfu_pfb_create_strideh_6to0 (pfu_pfb_create_strideh_6to0 ),
.pfu_pfb_create_type_ld (pfu_pfb_create_type_ld ),
.pfu_pfb_entry_biu_pe_req_grnt_x (pfu_pfb_entry_biu_pe_req_grnt[2] ),
.pfu_pfb_entry_biu_pe_req_src_v (pfu_pfb_entry_biu_pe_req_src_2 ),
.pfu_pfb_entry_biu_pe_req_x (pfu_pfb_entry_biu_pe_req[2] ),
.pfu_pfb_entry_create_dp_vld_x (pfu_pfb_entry_create_dp_vld[2] ),
.pfu_pfb_entry_create_gateclk_en_x (pfu_pfb_entry_create_gateclk_en[2] ),
.pfu_pfb_entry_create_vld_x (pfu_pfb_entry_create_vld[2] ),
.pfu_pfb_entry_evict_x (pfu_pfb_entry_evict[2] ),
.pfu_pfb_entry_from_lfb_dcache_hit_x (pfu_pfb_entry_from_lfb_dcache_hit[2] ),
.pfu_pfb_entry_from_lfb_dcache_miss_x (pfu_pfb_entry_from_lfb_dcache_miss[2]),
.pfu_pfb_entry_hit_pc_x (pfu_pfb_entry_hit_pc[2] ),
.pfu_pfb_entry_l1_page_sec_x (pfu_pfb_entry_l1_page_sec[2] ),
.pfu_pfb_entry_l1_page_share_x (pfu_pfb_entry_l1_page_share[2] ),
.pfu_pfb_entry_l1_pf_addr_v (pfu_pfb_entry_l1_pf_addr_2 ),
.pfu_pfb_entry_l1_vpn_v (pfu_pfb_entry_l1_vpn_2 ),
.pfu_pfb_entry_l2_page_sec_x (pfu_pfb_entry_l2_page_sec[2] ),
.pfu_pfb_entry_l2_page_share_x (pfu_pfb_entry_l2_page_share[2] ),
.pfu_pfb_entry_l2_pf_addr_v (pfu_pfb_entry_l2_pf_addr_2 ),
.pfu_pfb_entry_l2_vpn_v (pfu_pfb_entry_l2_vpn_2 ),
.pfu_pfb_entry_mmu_pe_req_grnt_x (pfu_pfb_entry_mmu_pe_req_grnt[2] ),
.pfu_pfb_entry_mmu_pe_req_src_v (pfu_pfb_entry_mmu_pe_req_src_2 ),
.pfu_pfb_entry_mmu_pe_req_x (pfu_pfb_entry_mmu_pe_req[2] ),
.pfu_pfb_entry_priv_mode_v (pfu_pfb_entry_priv_mode_2 ),
.pfu_pfb_entry_vld_x (pfu_pfb_entry_vld[2] ),
.pfu_pop_all_part_vld (pfu_pop_all_part_vld ),
.st_da_page_sec_ff (st_da_page_sec_ff ),
.st_da_page_share_ff (st_da_page_share_ff ),
.st_da_pc (st_da_pc ),
.st_da_pfu_act_vld (st_da_pfu_act_vld ),
.st_da_pfu_evict_cnt_vld (st_da_pfu_evict_cnt_vld ),
.st_da_pfu_pf_inst_vld (st_da_pfu_pf_inst_vld ),
.st_da_ppfu_va (st_da_ppfu_va ),
.st_da_ppn_ff (st_da_ppn_ff )
);
// &ConnRule(s/_x$/[3]/); @283
// &ConnRule(s/_v$/_3/); @284
// &Instance("ct_lsu_pfu_pfb_entry","x_ct_lsu_pfu_pfb_entry_3"); @285
ct_lsu_pfu_pfb_entry x_ct_lsu_pfu_pfb_entry_3 (
.amr_wa_cancel (amr_wa_cancel ),
.cp0_lsu_icg_en (cp0_lsu_icg_en ),
.cp0_lsu_l2_st_pref_en (cp0_lsu_l2_st_pref_en ),
.cp0_lsu_pfu_mmu_dis (cp0_lsu_pfu_mmu_dis ),
.cp0_yy_clk_en (cp0_yy_clk_en ),
.cp0_yy_priv_mode (cp0_yy_priv_mode ),
.cpurst_b (cpurst_b ),
.ld_da_ldfifo_pc (ld_da_ldfifo_pc ),
.ld_da_page_sec_ff (ld_da_page_sec_ff ),
.ld_da_page_share_ff (ld_da_page_share_ff ),
.ld_da_pfu_act_dp_vld (ld_da_pfu_act_dp_vld ),
.ld_da_pfu_act_vld (ld_da_pfu_act_vld ),
.ld_da_pfu_evict_cnt_vld (ld_da_pfu_evict_cnt_vld ),
.ld_da_pfu_pf_inst_vld (ld_da_pfu_pf_inst_vld ),
.ld_da_ppfu_va (ld_da_ppfu_va ),
.ld_da_ppn_ff (ld_da_ppn_ff ),
.lsu_pfu_l1_dist_sel (lsu_pfu_l1_dist_sel ),
.lsu_pfu_l2_dist_sel (lsu_pfu_l2_dist_sel ),
.lsu_special_clk (lsu_special_clk ),
.pad_yy_icg_scan_en (pad_yy_icg_scan_en ),
.pfb_no_req_cnt_val (pfb_no_req_cnt_val ),
.pfb_timeout_cnt_val (pfb_timeout_cnt_val ),
.pfu_biu_pe_req_sel_l1 (pfu_biu_pe_req_sel_l1 ),
.pfu_dcache_pref_en (pfu_dcache_pref_en ),
.pfu_get_page_sec (pfu_get_page_sec ),
.pfu_get_page_share (pfu_get_page_share ),
.pfu_get_ppn (pfu_get_ppn ),
.pfu_get_ppn_err (pfu_get_ppn_err ),
.pfu_get_ppn_vld (pfu_get_ppn_vld ),
.pfu_l2_pref_en (pfu_l2_pref_en ),
.pfu_mmu_pe_req_sel_l1 (pfu_mmu_pe_req_sel_l1 ),
.pfu_pfb_create_pc (pfu_pfb_create_pc ),
.pfu_pfb_create_stride (pfu_pfb_create_stride ),
.pfu_pfb_create_stride_neg (pfu_pfb_create_stride_neg ),
.pfu_pfb_create_strideh_6to0 (pfu_pfb_create_strideh_6to0 ),
.pfu_pfb_create_type_ld (pfu_pfb_create_type_ld ),
.pfu_pfb_entry_biu_pe_req_grnt_x (pfu_pfb_entry_biu_pe_req_grnt[3] ),
.pfu_pfb_entry_biu_pe_req_src_v (pfu_pfb_entry_biu_pe_req_src_3 ),
.pfu_pfb_entry_biu_pe_req_x (pfu_pfb_entry_biu_pe_req[3] ),
.pfu_pfb_entry_create_dp_vld_x (pfu_pfb_entry_create_dp_vld[3] ),
.pfu_pfb_entry_create_gateclk_en_x (pfu_pfb_entry_create_gateclk_en[3] ),
.pfu_pfb_entry_create_vld_x (pfu_pfb_entry_create_vld[3] ),
.pfu_pfb_entry_evict_x (pfu_pfb_entry_evict[3] ),
.pfu_pfb_entry_from_lfb_dcache_hit_x (pfu_pfb_entry_from_lfb_dcache_hit[3] ),
.pfu_pfb_entry_from_lfb_dcache_miss_x (pfu_pfb_entry_from_lfb_dcache_miss[3]),
.pfu_pfb_entry_hit_pc_x (pfu_pfb_entry_hit_pc[3] ),
.pfu_pfb_entry_l1_page_sec_x (pfu_pfb_entry_l1_page_sec[3] ),
.pfu_pfb_entry_l1_page_share_x (pfu_pfb_entry_l1_page_share[3] ),
.pfu_pfb_entry_l1_pf_addr_v (pfu_pfb_entry_l1_pf_addr_3 ),
.pfu_pfb_entry_l1_vpn_v (pfu_pfb_entry_l1_vpn_3 ),
.pfu_pfb_entry_l2_page_sec_x (pfu_pfb_entry_l2_page_sec[3] ),
.pfu_pfb_entry_l2_page_share_x (pfu_pfb_entry_l2_page_share[3] ),
.pfu_pfb_entry_l2_pf_addr_v (pfu_pfb_entry_l2_pf_addr_3 ),
.pfu_pfb_entry_l2_vpn_v (pfu_pfb_entry_l2_vpn_3 ),
.pfu_pfb_entry_mmu_pe_req_grnt_x (pfu_pfb_entry_mmu_pe_req_grnt[3] ),
.pfu_pfb_entry_mmu_pe_req_src_v (pfu_pfb_entry_mmu_pe_req_src_3 ),
.pfu_pfb_entry_mmu_pe_req_x (pfu_pfb_entry_mmu_pe_req[3] ),
.pfu_pfb_entry_priv_mode_v (pfu_pfb_entry_priv_mode_3 ),
.pfu_pfb_entry_vld_x (pfu_pfb_entry_vld[3] ),
.pfu_pop_all_part_vld (pfu_pop_all_part_vld ),
.st_da_page_sec_ff (st_da_page_sec_ff ),
.st_da_page_share_ff (st_da_page_share_ff ),
.st_da_pc (st_da_pc ),
.st_da_pfu_act_vld (st_da_pfu_act_vld ),
.st_da_pfu_evict_cnt_vld (st_da_pfu_evict_cnt_vld ),
.st_da_pfu_pf_inst_vld (st_da_pfu_pf_inst_vld ),
.st_da_ppfu_va (st_da_ppfu_va ),
.st_da_ppn_ff (st_da_ppn_ff )
);
这段代码继续实例化预取缓冲单元（PFU）的预取缓冲条目（PFB），特别是第二个和第三个条目（索引为2和3）。
功能
每个PFB条目负责管理一组特定的预取请求。这包括跟踪预取地址、处理与内存管理单元（MMU）的交互、以及根据页面属性（如安全性和共享性）更新状态。PFB条目为PFU提供了所需的数据，以决定何时以及如何进行数据预取，以优化内存访问。
参数作用
cp0_* 参数与时钟、电源管理和系统配置相关。ld_da_* 和st_da_* 参数来自加载和存储指令，用于更新PFB条目。pfu_* 参数是PFU特定的，涉及预取逻辑的状态和配置。amr_wa_cancel 处理地址监视器（AMR）的取消请求。
代码实现流程
-
实例化PFB条目：
- 每个PFB条目是通过
ct_lsu_pfu_pfb_entry 模块实例化的，接收多个输入信号。
- 每个PFB条目是通过
-
参数和信号传递：
- 加载/存储指令的数据和PFU的控制信号传递给每个PFB条目。
- 根据输入信号和内部逻辑，PFB条目更新其状态。
-
状态和控制信号管理：
- 每个条目根据其接收的数据管理预取地址和页面属性。
- 处理与MMU的交互，如页表项的获取和地址转换。
- 跟踪预取请求的进展和状态，如是否从LFB（Load Forwarding Buffer）命中缓存。
通过这种方式，PFB条目支持PFU高效处理预取请求，有助于减少内存访问延迟，提高系统性能。
// &ConnRule(s/_x$/[4]/); @287
// &ConnRule(s/_v$/_4/); @288
// &Instance("ct_lsu_pfu_pfb_entry","x_ct_lsu_pfu_pfb_entry_4"); @289
ct_lsu_pfu_pfb_entry x_ct_lsu_pfu_pfb_entry_4 (
.amr_wa_cancel (amr_wa_cancel ),
.cp0_lsu_icg_en (cp0_lsu_icg_en ),
.cp0_lsu_l2_st_pref_en (cp0_lsu_l2_st_pref_en ),
.cp0_lsu_pfu_mmu_dis (cp0_lsu_pfu_mmu_dis ),
.cp0_yy_clk_en (cp0_yy_clk_en ),
.cp0_yy_priv_mode (cp0_yy_priv_mode ),
.cpurst_b (cpurst_b ),
.ld_da_ldfifo_pc (ld_da_ldfifo_pc ),
.ld_da_page_sec_ff (ld_da_page_sec_ff ),
.ld_da_page_share_ff (ld_da_page_share_ff ),
.ld_da_pfu_act_dp_vld (ld_da_pfu_act_dp_vld ),
.ld_da_pfu_act_vld (ld_da_pfu_act_vld ),
.ld_da_pfu_evict_cnt_vld (ld_da_pfu_evict_cnt_vld ),
.ld_da_pfu_pf_inst_vld (ld_da_pfu_pf_inst_vld ),
.ld_da_ppfu_va (ld_da_ppfu_va ),
.ld_da_ppn_ff (ld_da_ppn_ff ),
.lsu_pfu_l1_dist_sel (lsu_pfu_l1_dist_sel ),
.lsu_pfu_l2_dist_sel (lsu_pfu_l2_dist_sel ),
.lsu_special_clk (lsu_special_clk ),
.pad_yy_icg_scan_en (pad_yy_icg_scan_en ),
.pfb_no_req_cnt_val (pfb_no_req_cnt_val ),
.pfb_timeout_cnt_val (pfb_timeout_cnt_val ),
.pfu_biu_pe_req_sel_l1 (pfu_biu_pe_req_sel_l1 ),
.pfu_dcache_pref_en (pfu_dcache_pref_en ),
.pfu_get_page_sec (pfu_get_page_sec ),
.pfu_get_page_share (pfu_get_page_share ),
.pfu_get_ppn (pfu_get_ppn ),
.pfu_get_ppn_err (pfu_get_ppn_err ),
.pfu_get_ppn_vld (pfu_get_ppn_vld ),
.pfu_l2_pref_en (pfu_l2_pref_en ),
.pfu_mmu_pe_req_sel_l1 (pfu_mmu_pe_req_sel_l1 ),
.pfu_pfb_create_pc (pfu_pfb_create_pc ),
.pfu_pfb_create_stride (pfu_pfb_create_stride ),
.pfu_pfb_create_stride_neg (pfu_pfb_create_stride_neg ),
.pfu_pfb_create_strideh_6to0 (pfu_pfb_create_strideh_6to0 ),
.pfu_pfb_create_type_ld (pfu_pfb_create_type_ld ),
.pfu_pfb_entry_biu_pe_req_grnt_x (pfu_pfb_entry_biu_pe_req_grnt[4] ),
.pfu_pfb_entry_biu_pe_req_src_v (pfu_pfb_entry_biu_pe_req_src_4 ),
.pfu_pfb_entry_biu_pe_req_x (pfu_pfb_entry_biu_pe_req[4] ),
.pfu_pfb_entry_create_dp_vld_x (pfu_pfb_entry_create_dp_vld[4] ),
.pfu_pfb_entry_create_gateclk_en_x (pfu_pfb_entry_create_gateclk_en[4] ),
.pfu_pfb_entry_create_vld_x (pfu_pfb_entry_create_vld[4] ),
.pfu_pfb_entry_evict_x (pfu_pfb_entry_evict[4] ),
.pfu_pfb_entry_from_lfb_dcache_hit_x (pfu_pfb_entry_from_lfb_dcache_hit[4] ),
.pfu_pfb_entry_from_lfb_dcache_miss_x (pfu_pfb_entry_from_lfb_dcache_miss[4]),
.pfu_pfb_entry_hit_pc_x (pfu_pfb_entry_hit_pc[4] ),
.pfu_pfb_entry_l1_page_sec_x (pfu_pfb_entry_l1_page_sec[4] ),
.pfu_pfb_entry_l1_page_share_x (pfu_pfb_entry_l1_page_share[4] ),
.pfu_pfb_entry_l1_pf_addr_v (pfu_pfb_entry_l1_pf_addr_4 ),
.pfu_pfb_entry_l1_vpn_v (pfu_pfb_entry_l1_vpn_4 ),
.pfu_pfb_entry_l2_page_sec_x (pfu_pfb_entry_l2_page_sec[4] ),
.pfu_pfb_entry_l2_page_share_x (pfu_pfb_entry_l2_page_share[4] ),
.pfu_pfb_entry_l2_pf_addr_v (pfu_pfb_entry_l2_pf_addr_4 ),
.pfu_pfb_entry_l2_vpn_v (pfu_pfb_entry_l2_vpn_4 ),
.pfu_pfb_entry_mmu_pe_req_grnt_x (pfu_pfb_entry_mmu_pe_req_grnt[4] ),
.pfu_pfb_entry_mmu_pe_req_src_v (pfu_pfb_entry_mmu_pe_req_src_4 ),
.pfu_pfb_entry_mmu_pe_req_x (pfu_pfb_entry_mmu_pe_req[4] ),
.pfu_pfb_entry_priv_mode_v (pfu_pfb_entry_priv_mode_4 ),
.pfu_pfb_entry_vld_x (pfu_pfb_entry_vld[4] ),
.pfu_pop_all_part_vld (pfu_pop_all_part_vld ),
.st_da_page_sec_ff (st_da_page_sec_ff ),
.st_da_page_share_ff (st_da_page_share_ff ),
.st_da_pc (st_da_pc ),
.st_da_pfu_act_vld (st_da_pfu_act_vld ),
.st_da_pfu_evict_cnt_vld (st_da_pfu_evict_cnt_vld ),
.st_da_pfu_pf_inst_vld (st_da_pfu_pf_inst_vld ),
.st_da_ppfu_va (st_da_ppfu_va ),
.st_da_ppn_ff (st_da_ppn_ff )
);
// &ConnRule(s/_x$/[5]/); @291
// &ConnRule(s/_v$/_5/); @292
// &Instance("ct_lsu_pfu_pfb_entry","x_ct_lsu_pfu_pfb_entry_5"); @293
ct_lsu_pfu_pfb_entry x_ct_lsu_pfu_pfb_entry_5 (
.amr_wa_cancel (amr_wa_cancel ),
.cp0_lsu_icg_en (cp0_lsu_icg_en ),
.cp0_lsu_l2_st_pref_en (cp0_lsu_l2_st_pref_en ),
.cp0_lsu_pfu_mmu_dis (cp0_lsu_pfu_mmu_dis ),
.cp0_yy_clk_en (cp0_yy_clk_en ),
.cp0_yy_priv_mode (cp0_yy_priv_mode ),
.cpurst_b (cpurst_b ),
.ld_da_ldfifo_pc (ld_da_ldfifo_pc ),
.ld_da_page_sec_ff (ld_da_page_sec_ff ),
.ld_da_page_share_ff (ld_da_page_share_ff ),
.ld_da_pfu_act_dp_vld (ld_da_pfu_act_dp_vld ),
.ld_da_pfu_act_vld (ld_da_pfu_act_vld ),
.ld_da_pfu_evict_cnt_vld (ld_da_pfu_evict_cnt_vld ),
.ld_da_pfu_pf_inst_vld (ld_da_pfu_pf_inst_vld ),
.ld_da_ppfu_va (ld_da_ppfu_va ),
.ld_da_ppn_ff (ld_da_ppn_ff ),
.lsu_pfu_l1_dist_sel (lsu_pfu_l1_dist_sel ),
.lsu_pfu_l2_dist_sel (lsu_pfu_l2_dist_sel ),
.lsu_special_clk (lsu_special_clk ),
.pad_yy_icg_scan_en (pad_yy_icg_scan_en ),
.pfb_no_req_cnt_val (pfb_no_req_cnt_val ),
.pfb_timeout_cnt_val (pfb_timeout_cnt_val ),
.pfu_biu_pe_req_sel_l1 (pfu_biu_pe_req_sel_l1 ),
.pfu_dcache_pref_en (pfu_dcache_pref_en ),
.pfu_get_page_sec (pfu_get_page_sec ),
.pfu_get_page_share (pfu_get_page_share ),
.pfu_get_ppn (pfu_get_ppn ),
.pfu_get_ppn_err (pfu_get_ppn_err ),
.pfu_get_ppn_vld (pfu_get_ppn_vld ),
.pfu_l2_pref_en (pfu_l2_pref_en ),
.pfu_mmu_pe_req_sel_l1 (pfu_mmu_pe_req_sel_l1 ),
.pfu_pfb_create_pc (pfu_pfb_create_pc ),
.pfu_pfb_create_stride (pfu_pfb_create_stride ),
.pfu_pfb_create_stride_neg (pfu_pfb_create_stride_neg ),
.pfu_pfb_create_strideh_6to0 (pfu_pfb_create_strideh_6to0 ),
.pfu_pfb_create_type_ld (pfu_pfb_create_type_ld ),
.pfu_pfb_entry_biu_pe_req_grnt_x (pfu_pfb_entry_biu_pe_req_grnt[5] ),
.pfu_pfb_entry_biu_pe_req_src_v (pfu_pfb_entry_biu_pe_req_src_5 ),
.pfu_pfb_entry_biu_pe_req_x (pfu_pfb_entry_biu_pe_req[5] ),
.pfu_pfb_entry_create_dp_vld_x (pfu_pfb_entry_create_dp_vld[5] ),
.pfu_pfb_entry_create_gateclk_en_x (pfu_pfb_entry_create_gateclk_en[5] ),
.pfu_pfb_entry_create_vld_x (pfu_pfb_entry_create_vld[5] ),
.pfu_pfb_entry_evict_x (pfu_pfb_entry_evict[5] ),
.pfu_pfb_entry_from_lfb_dcache_hit_x (pfu_pfb_entry_from_lfb_dcache_hit[5] ),
.pfu_pfb_entry_from_lfb_dcache_miss_x (pfu_pfb_entry_from_lfb_dcache_miss[5]),
.pfu_pfb_entry_hit_pc_x (pfu_pfb_entry_hit_pc[5] ),
.pfu_pfb_entry_l1_page_sec_x (pfu_pfb_entry_l1_page_sec[5] ),
.pfu_pfb_entry_l1_page_share_x (pfu_pfb_entry_l1_page_share[5] ),
.pfu_pfb_entry_l1_pf_addr_v (pfu_pfb_entry_l1_pf_addr_5 ),
.pfu_pfb_entry_l1_vpn_v (pfu_pfb_entry_l1_vpn_5 ),
.pfu_pfb_entry_l2_page_sec_x (pfu_pfb_entry_l2_page_sec[5] ),
.pfu_pfb_entry_l2_page_share_x (pfu_pfb_entry_l2_page_share[5] ),
.pfu_pfb_entry_l2_pf_addr_v (pfu_pfb_entry_l2_pf_addr_5 ),
.pfu_pfb_entry_l2_vpn_v (pfu_pfb_entry_l2_vpn_5 ),
.pfu_pfb_entry_mmu_pe_req_grnt_x (pfu_pfb_entry_mmu_pe_req_grnt[5] ),
.pfu_pfb_entry_mmu_pe_req_src_v (pfu_pfb_entry_mmu_pe_req_src_5 ),
.pfu_pfb_entry_mmu_pe_req_x (pfu_pfb_entry_mmu_pe_req[5] ),
.pfu_pfb_entry_priv_mode_v (pfu_pfb_entry_priv_mode_5 ),
.pfu_pfb_entry_vld_x (pfu_pfb_entry_vld[5] ),
.pfu_pop_all_part_vld (pfu_pop_all_part_vld ),
.st_da_page_sec_ff (st_da_page_sec_ff ),
.st_da_page_share_ff (st_da_page_share_ff ),
.st_da_pc (st_da_pc ),
.st_da_pfu_act_vld (st_da_pfu_act_vld ),
.st_da_pfu_evict_cnt_vld (st_da_pfu_evict_cnt_vld ),
.st_da_pfu_pf_inst_vld (st_da_pfu_pf_inst_vld ),
.st_da_ppfu_va (st_da_ppfu_va ),
.st_da_ppn_ff (st_da_ppn_ff )
);
// &ConnRule(s/_x$/[6]/); @295
// &ConnRule(s/_v$/_6/); @296
// &Instance("ct_lsu_pfu_pfb_entry","x_ct_lsu_pfu_pfb_entry_6"); @297
ct_lsu_pfu_pfb_entry x_ct_lsu_pfu_pfb_entry_6 (
.amr_wa_cancel (amr_wa_cancel ),
.cp0_lsu_icg_en (cp0_lsu_icg_en ),
.cp0_lsu_l2_st_pref_en (cp0_lsu_l2_st_pref_en ),
.cp0_lsu_pfu_mmu_dis (cp0_lsu_pfu_mmu_dis ),
.cp0_yy_clk_en (cp0_yy_clk_en ),
.cp0_yy_priv_mode (cp0_yy_priv_mode ),
.cpurst_b (cpurst_b ),
.ld_da_ldfifo_pc (ld_da_ldfifo_pc ),
.ld_da_page_sec_ff (ld_da_page_sec_ff ),
.ld_da_page_share_ff (ld_da_page_share_ff ),
.ld_da_pfu_act_dp_vld (ld_da_pfu_act_dp_vld ),
.ld_da_pfu_act_vld (ld_da_pfu_act_vld ),
.ld_da_pfu_evict_cnt_vld (ld_da_pfu_evict_cnt_vld ),
.ld_da_pfu_pf_inst_vld (ld_da_pfu_pf_inst_vld ),
.ld_da_ppfu_va (ld_da_ppfu_va ),
.ld_da_ppn_ff (ld_da_ppn_ff ),
.lsu_pfu_l1_dist_sel (lsu_pfu_l1_dist_sel ),
.lsu_pfu_l2_dist_sel (lsu_pfu_l2_dist_sel ),
.lsu_special_clk (lsu_special_clk ),
.pad_yy_icg_scan_en (pad_yy_icg_scan_en ),
.pfb_no_req_cnt_val (pfb_no_req_cnt_val ),
.pfb_timeout_cnt_val (pfb_timeout_cnt_val ),
.pfu_biu_pe_req_sel_l1 (pfu_biu_pe_req_sel_l1 ),
.pfu_dcache_pref_en (pfu_dcache_pref_en ),
.pfu_get_page_sec (pfu_get_page_sec ),
.pfu_get_page_share (pfu_get_page_share ),
.pfu_get_ppn (pfu_get_ppn ),
.pfu_get_ppn_err (pfu_get_ppn_err ),
.pfu_get_ppn_vld (pfu_get_ppn_vld ),
.pfu_l2_pref_en (pfu_l2_pref_en ),
.pfu_mmu_pe_req_sel_l1 (pfu_mmu_pe_req_sel_l1 ),
.pfu_pfb_create_pc (pfu_pfb_create_pc ),
.pfu_pfb_create_stride (pfu_pfb_create_stride ),
.pfu_pfb_create_stride_neg (pfu_pfb_create_stride_neg ),
.pfu_pfb_create_strideh_6to0 (pfu_pfb_create_strideh_6to0 ),
.pfu_pfb_create_type_ld (pfu_pfb_create_type_ld ),
.pfu_pfb_entry_biu_pe_req_grnt_x (pfu_pfb_entry_biu_pe_req_grnt[6] ),
.pfu_pfb_entry_biu_pe_req_src_v (pfu_pfb_entry_biu_pe_req_src_6 ),
.pfu_pfb_entry_biu_pe_req_x (pfu_pfb_entry_biu_pe_req[6] ),
.pfu_pfb_entry_create_dp_vld_x (pfu_pfb_entry_create_dp_vld[6] ),
.pfu_pfb_entry_create_gateclk_en_x (pfu_pfb_entry_create_gateclk_en[6] ),
.pfu_pfb_entry_create_vld_x (pfu_pfb_entry_create_vld[6] ),
.pfu_pfb_entry_evict_x (pfu_pfb_entry_evict[6] ),
.pfu_pfb_entry_from_lfb_dcache_hit_x (pfu_pfb_entry_from_lfb_dcache_hit[6] ),
.pfu_pfb_entry_from_lfb_dcache_miss_x (pfu_pfb_entry_from_lfb_dcache_miss[6]),
.pfu_pfb_entry_hit_pc_x (pfu_pfb_entry_hit_pc[6] ),
.pfu_pfb_entry_l1_page_sec_x (pfu_pfb_entry_l1_page_sec[6] ),
.pfu_pfb_entry_l1_page_share_x (pfu_pfb_entry_l1_page_share[6] ),
.pfu_pfb_entry_l1_pf_addr_v (pfu_pfb_entry_l1_pf_addr_6 ),
.pfu_pfb_entry_l1_vpn_v (pfu_pfb_entry_l1_vpn_6 ),
.pfu_pfb_entry_l2_page_sec_x (pfu_pfb_entry_l2_page_sec[6] ),
.pfu_pfb_entry_l2_page_share_x (pfu_pfb_entry_l2_page_share[6] ),
.pfu_pfb_entry_l2_pf_addr_v (pfu_pfb_entry_l2_pf_addr_6 ),
.pfu_pfb_entry_l2_vpn_v (pfu_pfb_entry_l2_vpn_6 ),
.pfu_pfb_entry_mmu_pe_req_grnt_x (pfu_pfb_entry_mmu_pe_req_grnt[6] ),
.pfu_pfb_entry_mmu_pe_req_src_v (pfu_pfb_entry_mmu_pe_req_src_6 ),
.pfu_pfb_entry_mmu_pe_req_x (pfu_pfb_entry_mmu_pe_req[6] ),
.pfu_pfb_entry_priv_mode_v (pfu_pfb_entry_priv_mode_6 ),
.pfu_pfb_entry_vld_x (pfu_pfb_entry_vld[6] ),
.pfu_pop_all_part_vld (pfu_pop_all_part_vld ),
.st_da_page_sec_ff (st_da_page_sec_ff ),
.st_da_page_share_ff (st_da_page_share_ff ),
.st_da_pc (st_da_pc ),
.st_da_pfu_act_vld (st_da_pfu_act_vld ),
.st_da_pfu_evict_cnt_vld (st_da_pfu_evict_cnt_vld ),
.st_da_pfu_pf_inst_vld (st_da_pfu_pf_inst_vld ),
.st_da_ppfu_va (st_da_ppfu_va ),
.st_da_ppn_ff (st_da_ppn_ff )
);
// &ConnRule(s/_x$/[7]/); @299
// &ConnRule(s/_v$/_7/); @300
// &Instance("ct_lsu_pfu_pfb_entry","x_ct_lsu_pfu_pfb_entry_7"); @301
ct_lsu_pfu_pfb_entry x_ct_lsu_pfu_pfb_entry_7 (
.amr_wa_cancel (amr_wa_cancel ),
.cp0_lsu_icg_en (cp0_lsu_icg_en ),
.cp0_lsu_l2_st_pref_en (cp0_lsu_l2_st_pref_en ),
.cp0_lsu_pfu_mmu_dis (cp0_lsu_pfu_mmu_dis ),
.cp0_yy_clk_en (cp0_yy_clk_en ),
.cp0_yy_priv_mode (cp0_yy_priv_mode ),
.cpurst_b (cpurst_b ),
.ld_da_ldfifo_pc (ld_da_ldfifo_pc ),
.ld_da_page_sec_ff (ld_da_page_sec_ff ),
.ld_da_page_share_ff (ld_da_page_share_ff ),
.ld_da_pfu_act_dp_vld (ld_da_pfu_act_dp_vld ),
.ld_da_pfu_act_vld (ld_da_pfu_act_vld ),
.ld_da_pfu_evict_cnt_vld (ld_da_pfu_evict_cnt_vld ),
.ld_da_pfu_pf_inst_vld (ld_da_pfu_pf_inst_vld ),
.ld_da_ppfu_va (ld_da_ppfu_va ),
.ld_da_ppn_ff (ld_da_ppn_ff ),
.lsu_pfu_l1_dist_sel (lsu_pfu_l1_dist_sel ),
.lsu_pfu_l2_dist_sel (lsu_pfu_l2_dist_sel ),
.lsu_special_clk (lsu_special_clk ),
.pad_yy_icg_scan_en (pad_yy_icg_scan_en ),
.pfb_no_req_cnt_val (pfb_no_req_cnt_val ),
.pfb_timeout_cnt_val (pfb_timeout_cnt_val ),
.pfu_biu_pe_req_sel_l1 (pfu_biu_pe_req_sel_l1 ),
.pfu_dcache_pref_en (pfu_dcache_pref_en ),
.pfu_get_page_sec (pfu_get_page_sec ),
.pfu_get_page_share (pfu_get_page_share ),
.pfu_get_ppn (pfu_get_ppn ),
.pfu_get_ppn_err (pfu_get_ppn_err ),
.pfu_get_ppn_vld (pfu_get_ppn_vld ),
.pfu_l2_pref_en (pfu_l2_pref_en ),
.pfu_mmu_pe_req_sel_l1 (pfu_mmu_pe_req_sel_l1 ),
.pfu_pfb_create_pc (pfu_pfb_create_pc ),
.pfu_pfb_create_stride (pfu_pfb_create_stride ),
.pfu_pfb_create_stride_neg (pfu_pfb_create_stride_neg ),
.pfu_pfb_create_strideh_6to0 (pfu_pfb_create_strideh_6to0 ),
.pfu_pfb_create_type_ld (pfu_pfb_create_type_ld ),
.pfu_pfb_entry_biu_pe_req_grnt_x (pfu_pfb_entry_biu_pe_req_grnt[7] ),
.pfu_pfb_entry_biu_pe_req_src_v (pfu_pfb_entry_biu_pe_req_src_7 ),
.pfu_pfb_entry_biu_pe_req_x (pfu_pfb_entry_biu_pe_req[7] ),
.pfu_pfb_entry_create_dp_vld_x (pfu_pfb_entry_create_dp_vld[7] ),
.pfu_pfb_entry_create_gateclk_en_x (pfu_pfb_entry_create_gateclk_en[7] ),
.pfu_pfb_entry_create_vld_x (pfu_pfb_entry_create_vld[7] ),
.pfu_pfb_entry_evict_x (pfu_pfb_entry_evict[7] ),
.pfu_pfb_entry_from_lfb_dcache_hit_x (pfu_pfb_entry_from_lfb_dcache_hit[7] ),
.pfu_pfb_entry_from_lfb_dcache_miss_x (pfu_pfb_entry_from_lfb_dcache_miss[7]),
.pfu_pfb_entry_hit_pc_x (pfu_pfb_entry_hit_pc[7] ),
.pfu_pfb_entry_l1_page_sec_x (pfu_pfb_entry_l1_page_sec[7] ),
.pfu_pfb_entry_l1_page_share_x (pfu_pfb_entry_l1_page_share[7] ),
.pfu_pfb_entry_l1_pf_addr_v (pfu_pfb_entry_l1_pf_addr_7 ),
.pfu_pfb_entry_l1_vpn_v (pfu_pfb_entry_l1_vpn_7 ),
.pfu_pfb_entry_l2_page_sec_x (pfu_pfb_entry_l2_page_sec[7] ),
.pfu_pfb_entry_l2_page_share_x (pfu_pfb_entry_l2_page_share[7] ),
.pfu_pfb_entry_l2_pf_addr_v (pfu_pfb_entry_l2_pf_addr_7 ),
.pfu_pfb_entry_l2_vpn_v (pfu_pfb_entry_l2_vpn_7 ),
.pfu_pfb_entry_mmu_pe_req_grnt_x (pfu_pfb_entry_mmu_pe_req_grnt[7] ),
.pfu_pfb_entry_mmu_pe_req_src_v (pfu_pfb_entry_mmu_pe_req_src_7 ),
.pfu_pfb_entry_mmu_pe_req_x (pfu_pfb_entry_mmu_pe_req[7] ),
.pfu_pfb_entry_priv_mode_v (pfu_pfb_entry_priv_mode_7 ),
.pfu_pfb_entry_vld_x (pfu_pfb_entry_vld[7] ),
.pfu_pop_all_part_vld (pfu_pop_all_part_vld ),
.st_da_page_sec_ff (st_da_page_sec_ff ),
.st_da_page_share_ff (st_da_page_share_ff ),
.st_da_pc (st_da_pc ),
.st_da_pfu_act_vld (st_da_pfu_act_vld ),
.st_da_pfu_evict_cnt_vld (st_da_pfu_evict_cnt_vld ),
.st_da_pfu_pf_inst_vld (st_da_pfu_pf_inst_vld ),
.st_da_ppfu_va (st_da_ppfu_va ),
.st_da_ppn_ff (st_da_ppn_ff )
);
这段代码展示了预取缓冲单元（PFU）的预取缓冲条目（PFB）第四个和第五个实例的实现。每个PFB条目都是通过
功能
PFB条目负责处理预取逻辑，包括确定预取地址、与内存管理单元（MMU）交互以获取页表项和地址转换、以及根据页面属性（安全性和共享性）来更新状态。这些条目的目的是优化内存访问，减少访问延迟。
参数作用
cp0_* 参数用于控制时钟、电源管理和系统配置。ld_da_* 和st_da_* 参数来源于加载和存储指令，用于更新PFB条目的状态。pfu_* 参数特定于预取逻辑，控制预取的状态和行为。amr_wa_cancel 用于处理地址监视器的取消请求。
代码实现流程
-
实例化PFB条目：
- 通过
ct_lsu_pfu_pfb_entry 模块实例化第四个和第五个PFB条目，传递相关的输入信号。
- 通过
-
参数和信号传递：
- 将加载/存储指令的数据和PFU的控制信号传递给PFB条目。
-
状态更新和控制：
- 根据接收到的信号和内部逻辑，每个PFB条目更新其状态，包括预取地址和页面属性。
- 管理与MMU的交互，例如，获取页表项和进行地址转换。
- 跟踪预取请求的进展和状态，例如，是否从Load Forwarding Buffer（LFB）命中或未命中缓存。
PFB条目的这种管理方式支持PFU有效处理预取请求，减少内存访问延迟，提高整体系统性能。
// &ConnRule(s/_x$/[6]/); @295
// &ConnRule(s/_v$/_6/); @296
// &Instance("ct_lsu_pfu_pfb_entry","x_ct_lsu_pfu_pfb_entry_6"); @297
ct_lsu_pfu_pfb_entry x_ct_lsu_pfu_pfb_entry_6 (
.amr_wa_cancel (amr_wa_cancel ),
.cp0_lsu_icg_en (cp0_lsu_icg_en ),
.cp0_lsu_l2_st_pref_en (cp0_lsu_l2_st_pref_en ),
.cp0_lsu_pfu_mmu_dis (cp0_lsu_pfu_mmu_dis ),
.cp0_yy_clk_en (cp0_yy_clk_en ),
.cp0_yy_priv_mode (cp0_yy_priv_mode ),
.cpurst_b (cpurst_b ),
.ld_da_ldfifo_pc (ld_da_ldfifo_pc ),
.ld_da_page_sec_ff (ld_da_page_sec_ff ),
.ld_da_page_share_ff (ld_da_page_share_ff ),
.ld_da_pfu_act_dp_vld (ld_da_pfu_act_dp_vld ),
.ld_da_pfu_act_vld (ld_da_pfu_act_vld ),
.ld_da_pfu_evict_cnt_vld (ld_da_pfu_evict_cnt_vld ),
.ld_da_pfu_pf_inst_vld (ld_da_pfu_pf_inst_vld ),
.ld_da_ppfu_va (ld_da_ppfu_va ),
.ld_da_ppn_ff (ld_da_ppn_ff ),
.lsu_pfu_l1_dist_sel (lsu_pfu_l1_dist_sel ),
.lsu_pfu_l2_dist_sel (lsu_pfu_l2_dist_sel ),
.lsu_special_clk (lsu_special_clk ),
.pad_yy_icg_scan_en (pad_yy_icg_scan_en ),
.pfb_no_req_cnt_val (pfb_no_req_cnt_val ),
.pfb_timeout_cnt_val (pfb_timeout_cnt_val ),
.pfu_biu_pe_req_sel_l1 (pfu_biu_pe_req_sel_l1 ),
.pfu_dcache_pref_en (pfu_dcache_pref_en ),
.pfu_get_page_sec (pfu_get_page_sec ),
.pfu_get_page_share (pfu_get_page_share ),
.pfu_get_ppn (pfu_get_ppn ),
.pfu_get_ppn_err (pfu_get_ppn_err ),
.pfu_get_ppn_vld (pfu_get_ppn_vld ),
.pfu_l2_pref_en (pfu_l2_pref_en ),
.pfu_mmu_pe_req_sel_l1 (pfu_mmu_pe_req_sel_l1 ),
.pfu_pfb_create_pc (pfu_pfb_create_pc ),
.pfu_pfb_create_stride (pfu_pfb_create_stride ),
.pfu_pfb_create_stride_neg (pfu_pfb_create_stride_neg ),
.pfu_pfb_create_strideh_6to0 (pfu_pfb_create_strideh_6to0 ),
.pfu_pfb_create_type_ld (pfu_pfb_create_type_ld ),
.pfu_pfb_entry_biu_pe_req_grnt_x (pfu_pfb_entry_biu_pe_req_grnt[6] ),
.pfu_pfb_entry_biu_pe_req_src_v (pfu_pfb_entry_biu_pe_req_src_6 ),
.pfu_pfb_entry_biu_pe_req_x (pfu_pfb_entry_biu_pe_req[6] ),
.pfu_pfb_entry_create_dp_vld_x (pfu_pfb_entry_create_dp_vld[6] ),
.pfu_pfb_entry_create_gateclk_en_x (pfu_pfb_entry_create_gateclk_en[6] ),
.pfu_pfb_entry_create_vld_x (pfu_pfb_entry_create_vld[6] ),
.pfu_pfb_entry_evict_x (pfu_pfb_entry_evict[6] ),
.pfu_pfb_entry_from_lfb_dcache_hit_x (pfu_pfb_entry_from_lfb_dcache_hit[6] ),
.pfu_pfb_entry_from_lfb_dcache_miss_x (pfu_pfb_entry_from_lfb_dcache_miss[6]),
.pfu_pfb_entry_hit_pc_x (pfu_pfb_entry_hit_pc[6] ),
.pfu_pfb_entry_l1_page_sec_x (pfu_pfb_entry_l1_page_sec[6] ),
.pfu_pfb_entry_l1_page_share_x (pfu_pfb_entry_l1_page_share[6] ),
.pfu_pfb_entry_l1_pf_addr_v (pfu_pfb_entry_l1_pf_addr_6 ),
.pfu_pfb_entry_l1_vpn_v (pfu_pfb_entry_l1_vpn_6 ),
.pfu_pfb_entry_l2_page_sec_x (pfu_pfb_entry_l2_page_sec[6] ),
.pfu_pfb_entry_l2_page_share_x (pfu_pfb_entry_l2_page_share[6] ),
.pfu_pfb_entry_l2_pf_addr_v (pfu_pfb_entry_l2_pf_addr_6 ),
.pfu_pfb_entry_l2_vpn_v (pfu_pfb_entry_l2_vpn_6 ),
.pfu_pfb_entry_mmu_pe_req_grnt_x (pfu_pfb_entry_mmu_pe_req_grnt[6] ),
.pfu_pfb_entry_mmu_pe_req_src_v (pfu_pfb_entry_mmu_pe_req_src_6 ),
.pfu_pfb_entry_mmu_pe_req_x (pfu_pfb_entry_mmu_pe_req[6] ),
.pfu_pfb_entry_priv_mode_v (pfu_pfb_entry_priv_mode_6 ),
.pfu_pfb_entry_vld_x (pfu_pfb_entry_vld[6] ),
.pfu_pop_all_part_vld (pfu_pop_all_part_vld ),
.st_da_page_sec_ff (st_da_page_sec_ff ),
.st_da_page_share_ff (st_da_page_share_ff ),
.st_da_pc (st_da_pc ),
.st_da_pfu_act_vld (st_da_pfu_act_vld ),
.st_da_pfu_evict_cnt_vld (st_da_pfu_evict_cnt_vld ),
.st_da_pfu_pf_inst_vld (st_da_pfu_pf_inst_vld ),
.st_da_ppfu_va (st_da_ppfu_va ),
.st_da_ppn_ff (st_da_ppn_ff )
);
// &ConnRule(s/_x$/[7]/); @299
// &ConnRule(s/_v$/_7/); @300
// &Instance("ct_lsu_pfu_pfb_entry","x_ct_lsu_pfu_pfb_entry_7"); @301
ct_lsu_pfu_pfb_entry x_ct_lsu_pfu_pfb_entry_7 (
.amr_wa_cancel (amr_wa_cancel ),
.cp0_lsu_icg_en (cp0_lsu_icg_en ),
.cp0_lsu_l2_st_pref_en (cp0_lsu_l2_st_pref_en ),
.cp0_lsu_pfu_mmu_dis (cp0_lsu_pfu_mmu_dis ),
.cp0_yy_clk_en (cp0_yy_clk_en ),
.cp0_yy_priv_mode (cp0_yy_priv_mode ),
.cpurst_b (cpurst_b ),
.ld_da_ldfifo_pc (ld_da_ldfifo_pc ),
.ld_da_page_sec_ff (ld_da_page_sec_ff ),
.ld_da_page_share_ff (ld_da_page_share_ff ),
.ld_da_pfu_act_dp_vld (ld_da_pfu_act_dp_vld ),
.ld_da_pfu_act_vld (ld_da_pfu_act_vld ),
.ld_da_pfu_evict_cnt_vld (ld_da_pfu_evict_cnt_vld ),
.ld_da_pfu_pf_inst_vld (ld_da_pfu_pf_inst_vld ),
.ld_da_ppfu_va (ld_da_ppfu_va ),
.ld_da_ppn_ff (ld_da_ppn_ff ),
.lsu_pfu_l1_dist_sel (lsu_pfu_l1_dist_sel ),
.lsu_pfu_l2_dist_sel (lsu_pfu_l2_dist_sel ),
.lsu_special_clk (lsu_special_clk ),
.pad_yy_icg_scan_en (pad_yy_icg_scan_en ),
.pfb_no_req_cnt_val (pfb_no_req_cnt_val ),
.pfb_timeout_cnt_val (pfb_timeout_cnt_val ),
.pfu_biu_pe_req_sel_l1 (pfu_biu_pe_req_sel_l1 ),
.pfu_dcache_pref_en (pfu_dcache_pref_en ),
.pfu_get_page_sec (pfu_get_page_sec ),
.pfu_get_page_share (pfu_get_page_share ),
.pfu_get_ppn (pfu_get_ppn ),
.pfu_get_ppn_err (pfu_get_ppn_err ),
.pfu_get_ppn_vld (pfu_get_ppn_vld ),
.pfu_l2_pref_en (pfu_l2_pref_en ),
.pfu_mmu_pe_req_sel_l1 (pfu_mmu_pe_req_sel_l1 ),
.pfu_pfb_create_pc (pfu_pfb_create_pc ),
.pfu_pfb_create_stride (pfu_pfb_create_stride ),
.pfu_pfb_create_stride_neg (pfu_pfb_create_stride_neg ),
.pfu_pfb_create_strideh_6to0 (pfu_pfb_create_strideh_6to0 ),
.pfu_pfb_create_type_ld (pfu_pfb_create_type_ld ),
.pfu_pfb_entry_biu_pe_req_grnt_x (pfu_pfb_entry_biu_pe_req_grnt[7] ),
.pfu_pfb_entry_biu_pe_req_src_v (pfu_pfb_entry_biu_pe_req_src_7 ),
.pfu_pfb_entry_biu_pe_req_x (pfu_pfb_entry_biu_pe_req[7] ),
.pfu_pfb_entry_create_dp_vld_x (pfu_pfb_entry_create_dp_vld[7] ),
.pfu_pfb_entry_create_gateclk_en_x (pfu_pfb_entry_create_gateclk_en[7] ),
.pfu_pfb_entry_create_vld_x (pfu_pfb_entry_create_vld[7] ),
.pfu_pfb_entry_evict_x (pfu_pfb_entry_evict[7] ),
.pfu_pfb_entry_from_lfb_dcache_hit_x (pfu_pfb_entry_from_lfb_dcache_hit[7] ),
.pfu_pfb_entry_from_lfb_dcache_miss_x (pfu_pfb_entry_from_lfb_dcache_miss[7]),
.pfu_pfb_entry_hit_pc_x (pfu_pfb_entry_hit_pc[7] ),
.pfu_pfb_entry_l1_page_sec_x (pfu_pfb_entry_l1_page_sec[7] ),
.pfu_pfb_entry_l1_page_share_x (pfu_pfb_entry_l1_page_share[7] ),
.pfu_pfb_entry_l1_pf_addr_v (pfu_pfb_entry_l1_pf_addr_7 ),
.pfu_pfb_entry_l1_vpn_v (pfu_pfb_entry_l1_vpn_7 ),
.pfu_pfb_entry_l2_page_sec_x (pfu_pfb_entry_l2_page_sec[7] ),
.pfu_pfb_entry_l2_page_share_x (pfu_pfb_entry_l2_page_share[7] ),
.pfu_pfb_entry_l2_pf_addr_v (pfu_pfb_entry_l2_pf_addr_7 ),
.pfu_pfb_entry_l2_vpn_v (pfu_pfb_entry_l2_vpn_7 ),
.pfu_pfb_entry_mmu_pe_req_grnt_x (pfu_pfb_entry_mmu_pe_req_grnt[7] ),
.pfu_pfb_entry_mmu_pe_req_src_v (pfu_pfb_entry_mmu_pe_req_src_7 ),
.pfu_pfb_entry_mmu_pe_req_x (pfu_pfb_entry_mmu_pe_req[7] ),
.pfu_pfb_entry_priv_mode_v (pfu_pfb_entry_priv_mode_7 ),
.pfu_pfb_entry_vld_x (pfu_pfb_entry_vld[7] ),
.pfu_pop_all_part_vld (pfu_pop_all_part_vld ),
.st_da_page_sec_ff (st_da_page_sec_ff ),
.st_da_page_share_ff (st_da_page_share_ff ),
.st_da_pc (st_da_pc ),
.st_da_pfu_act_vld (st_da_pfu_act_vld ),
.st_da_pfu_evict_cnt_vld (st_da_pfu_evict_cnt_vld ),
.st_da_pfu_pf_inst_vld (st_da_pfu_pf_inst_vld ),
.st_da_ppfu_va (st_da_ppfu_va ),
.st_da_ppn_ff (st_da_ppn_ff )
);
这段代码是预取缓冲单元（PFU）的预取缓冲条目（PFB）第六个和第七个实例的实现。PFB条目是PFU中用于管理预取逻辑的关键组件。
功能
- PFB条目用于处理和维护预取请求。它们负责确定预取地址、与内存管理单元（MMU）进行交互以获取页表项和进行地址转换，以及根据页面的安全性和共享性更新状态。
参数作用
cp0_* 参数：控制时钟、电源管理和系统配置。ld_da_* 和st_da_* 参数：从加载和存储指令获取信息，用于更新PFB条目的状态。pfu_* 参数：特定于预取逻辑，控制预取行为。amr_wa_cancel ：处理地址监视器的取消请求。pad_yy_icg_scan_en ：控制集成时钟门控扫描。
代码实现流程
-
实例化PFB条目：
- 使用
ct_lsu_pfu_pfb_entry 模块实例化第六个和第七个PFB条目，为它们提供必要的输入信号。
- 使用
-
状态更新和控制：
- 每个PFB条目根据接收到的信号和内部逻辑更新其状态，包括预取地址和页面属性。
- 管理与MMU的交互，进行地址转换和获取页表项。
- 跟踪预取请求的进展，包括是否从Load Forwarding Buffer（LFB）命中或未命中缓存。
-
参数传递：
- 将加载/存储指令的数据、PFU的控制信号和MMU的反馈传递给PFB条目，以便它们可以相应地更新状态。
通过这种方式，PFB条目支持PFU有效地处理预取请求，减少内存访问延迟，提升系统性能。
//==========================================================
// Generate full/create signal of pfb
//==========================================================
//------------------pop pointer of sdb----------------------
// &CombBeg; @307
always @( pfu_sdb_entry_ready[1:0])
begin
pfu_sdb_pop_ptr[SDB_ENTRY-1:0] = {SDB_ENTRY{1'b0}};
casez(pfu_sdb_entry_ready[SDB_ENTRY-1:0])
2'b?1:pfu_sdb_pop_ptr[0] = 1'b1;
2'b10:pfu_sdb_pop_ptr[1] = 1'b1;
default:pfu_sdb_pop_ptr[SDB_ENTRY-1:0] = {SDB_ENTRY{1'b0}};
endcase
// &CombEnd; @314
end
//-------------------create info of pfb---------------------
assign pfu_pfb_create_pc[PC_LEN-1:0] = {PC_LEN{pfu_sdb_pop_ptr[0]}} & pfu_sdb_entry_pc_0[PC_LEN-1:0]
| {PC_LEN{pfu_sdb_pop_ptr[1]}} & pfu_sdb_entry_pc_1[PC_LEN-1:0];
assign pfu_pfb_create_stride[10:0] = {11{pfu_sdb_pop_ptr[0]}} & pfu_sdb_entry_stride_0[10:0]
| {11{pfu_sdb_pop_ptr[1]}} & pfu_sdb_entry_stride_1[10:0];
assign pfu_pfb_create_strideh_6to0[6:0] = {7{pfu_sdb_pop_ptr[0]}} & pfu_sdb_entry_strideh_6to0_0[6:0]
| {7{pfu_sdb_pop_ptr[1]}} & pfu_sdb_entry_strideh_6to0_1[6:0];
assign pfu_pfb_create_stride_neg = |(pfu_sdb_pop_ptr[SDB_ENTRY-1:0]
& pfu_sdb_entry_stride_neg[SDB_ENTRY-1:0]);
assign pfu_pfb_create_type_ld = |(pfu_sdb_pop_ptr[SDB_ENTRY-1:0]
& pfu_sdb_entry_type_ld[SDB_ENTRY-1:0]);
//---------------------create pointer-----------------------
//if it has empty entry, then create signal to empty entry,
//else create siganl to evict entry,
//else create fail
// &CombBeg; @332
always @( pfu_pfb_entry_vld[7:0])
begin
pfu_pfb_empty_create_ptr[PFB_ENTRY-1:0] = {PFB_ENTRY{1'b0}};
casez(pfu_pfb_entry_vld[PFB_ENTRY-1:0])
8'b????_???0:pfu_pfb_empty_create_ptr[0] = 1'b1;
8'b????_??01:pfu_pfb_empty_create_ptr[1] = 1'b1;
8'b????_?011:pfu_pfb_empty_create_ptr[2] = 1'b1;
8'b????_0111:pfu_pfb_empty_create_ptr[3] = 1'b1;
8'b???0_1111:pfu_pfb_empty_create_ptr[4] = 1'b1;
8'b??01_1111:pfu_pfb_empty_create_ptr[5] = 1'b1;
8'b?011_1111:pfu_pfb_empty_create_ptr[6] = 1'b1;
8'b0111_1111:pfu_pfb_empty_create_ptr[7] = 1'b1;
default:pfu_pfb_empty_create_ptr[PFB_ENTRY-1:0] = {PFB_ENTRY{1'b0}};
endcase
// &CombEnd; @345
end
// &CombBeg; @347
always @( pfu_pfb_entry_evict[7:0])
begin
pfu_pfb_evict_create_ptr[PFB_ENTRY-1:0] = {PFB_ENTRY{1'b0}};
casez(pfu_pfb_entry_evict[PFB_ENTRY-1:0])
8'b????_???1:pfu_pfb_evict_create_ptr[0] = 1'b1;
8'b????_??10:pfu_pfb_evict_create_ptr[1] = 1'b1;
8'b????_?100:pfu_pfb_evict_create_ptr[2] = 1'b1;
8'b????_1000:pfu_pfb_evict_create_ptr[3] = 1'b1;
8'b???1_0000:pfu_pfb_evict_create_ptr[4] = 1'b1;
8'b??10_0000:pfu_pfb_evict_create_ptr[5] = 1'b1;
8'b?100_0000:pfu_pfb_evict_create_ptr[6] = 1'b1;
8'b1000_0000:pfu_pfb_evict_create_ptr[7] = 1'b1;
default:pfu_pfb_evict_create_ptr[PFB_ENTRY-1:0] = {PFB_ENTRY{1'b0}};
endcase
// &CombEnd; @360
end
assign pfu_pfb_full = &pfu_pfb_entry_vld[PFB_ENTRY-1:0];
assign pfu_pfb_has_evict = |pfu_pfb_entry_evict[PFB_ENTRY-1:0];
assign pfu_pfb_create_ptr[PFB_ENTRY-1:0] = pfu_pfb_full
? pfu_pfb_evict_create_ptr[PFB_ENTRY-1:0]
: pfu_pfb_empty_create_ptr[PFB_ENTRY-1:0];
这段代码描述了预取缓冲条目（PFB）的生成逻辑，包括PFB的填充状态、创建信号、以及如何从预取流水线（SDB）中提取数据来创建PFB条目。
功能
- 处理SDB条目的弹出逻辑：当一个条目在SDB（Stride Detection Buffer）中完成时，它会被弹出并用于创建PFB条目。
- 生成PFB条目的创建信息：包括程序计数器（PC）、步长信息，以及预取类型（加载或存储）。
- 确定PFB条目的创建位置：根据PFB中的空闲或可逐出条目的位置，决定新条目的位置。
参数作用
pfu_sdb_entry_ready ：表示SDB条目是否准备好被弹出。pfu_pfb_entry_vld 和pfu_pfb_entry_evict ：分别表示PFB条目是否有效和是否可以被逐出。
代码实现流程
- 弹出指针生成：根据SDB条目的就绪状态，生成一个弹出指针
pfu_sdb_pop_ptr 。 - 创建信息生成：使用弹出指针选择相应的SDB条目数据（如PC和步长），用于构建新的PFB条目。
- 创建位置决定：
- 首先检查PFB中是否有空闲位置，如果有，则生成指向这些空闲位置的指针
pfu_pfb_empty_create_ptr 。 - 如果没有空闲位置，则检查是否有可以被逐出的条目，生成指向这些条目的指针
pfu_pfb_evict_create_ptr 。
- 首先检查PFB中是否有空闲位置，如果有，则生成指向这些空闲位置的指针
- 创建指针选择：
- 如果PFB已满，但存在可逐出的条目，则选择
pfu_pfb_evict_create_ptr 。 - 如果PFB未满，选择
pfu_pfb_empty_create_ptr 。
- 如果PFB已满，但存在可逐出的条目，则选择
这个过程确保了PFB可以有效地利用其空间，同时优先考虑在SDB中完成的预取请求，从而提高预取效率。