diff options
Diffstat (limited to 'rtl/cache/cache_control.sv')
| -rw-r--r-- | rtl/cache/cache_control.sv | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/rtl/cache/cache_control.sv b/rtl/cache/cache_control.sv index 090fba4..46d4638 100644 --- a/rtl/cache/cache_control.sv +++ b/rtl/cache/cache_control.sv @@ -51,7 +51,11 @@ module cache_control output word mem_address, output logic mem_read, mem_write, - output line mem_writedata + output line mem_writedata, + + input logic dbg_write, + input addr_index debug_index, + output logic debug_ready ); enum int unsigned @@ -62,8 +66,8 @@ module cache_control REPLY } state, next_state; - logic accept_snoop, end_reply, in_hold_valid, last_hop, lock_line, locked, - may_send, may_send_if_token_held, mem_begin, mem_end, mem_read_end, + logic accept_snoop, debug, end_reply, in_hold_valid, last_hop, lock_line, + locked, may_send, may_send_if_token_held, mem_begin, mem_end, mem_read_end, mem_wait, out_stall, wait_reply, replace, retry, send, send_inval, send_read, snoop_hit, set_reply, unlock_line, writeback; @@ -145,6 +149,9 @@ module cache_control if (accept_snoop) index_rd = in_hold.index; + + if (debug) + index_rd = debug_index; end CORE: begin @@ -321,6 +328,7 @@ module cache_control end always_comb begin + debug = 0; next_state = ACCEPT; unique case (state) @@ -329,6 +337,8 @@ module cache_control next_state = SNOOP; else if (in_hold_valid && last_hop && in_hold.read) next_state = REPLY; + else if (dbg_write && !debug_ready) + debug = 1; else if ((core_read || core_write) && !wait_reply && (!locked || may_send)) next_state = CORE; @@ -356,6 +366,8 @@ module cache_control mem_read <= 0; mem_write <= 0; + + debug_ready <= 0; end else begin out_token.e0.tag <= core_tag; out_token.e0.index <= core_index; @@ -391,6 +403,8 @@ module cache_control mem_read <= !writeback; mem_write <= writeback; end + + debug_ready <= debug; end always_ff @(posedge clk) begin |