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| author | Alejandro Soto <alejandro@34project.org> | 2023-10-04 18:06:48 -0600 |
|---|---|---|
| committer | Alejandro Soto <alejandro@34project.org> | 2023-10-04 18:06:48 -0600 |
| commit | cb1c2ce13066d7ef64d92699d005a67858ff06a8 (patch) | |
| tree | b5ef55f9756e96ea01d396c89189c54f8f2a1876 /rtl/cache/offsets.sv | |
| parent | 8741aef09939f7775cb66058c59cbc8e321f4372 (diff) | |
| parent | 84ac4c10f1e3ca4f779a19a1b0a2c43c5e18e37d (diff) | |
Merge remote-tracking branch 'origin/comentarios' into arqui2
Diffstat (limited to 'rtl/cache/offsets.sv')
| -rw-r--r-- | rtl/cache/offsets.sv | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/rtl/cache/offsets.sv b/rtl/cache/offsets.sv index a933d1c..205d847 100644 --- a/rtl/cache/offsets.sv +++ b/rtl/cache/offsets.sv @@ -2,7 +2,7 @@ module cache_offsets ( - input addr_offset core_offset, + input addr_offset core_offset, // El offset es un input pero no un output porque se mapea input word_be core_byteenable, input word core_writedata, input line core_readdata_line, @@ -10,21 +10,24 @@ module cache_offsets output line core_data_wr, core_writedata_line, - output word core_readdata, + output word core_readdata, // Readdata pasa de ser una line en el input a una word por el offset output line_be core_byteenable_line ); - + // Simplificar offset, para que sea transparente para la cache line line_mask; + + // El byteenable se utiliza para leer o escribir en cache algo diferente a una word word be_extend, mask3, mask2, mask1, mask0; word_be be3, be2, be1, be0; assign core_writedata_line = {4{core_writedata}}; assign core_byteenable_line = {be3, be2, be1, be0}; + // Concatenar para extender a una word ([31:0]) según el valor de byteenable que es [3:0] assign be_extend = {{8{core_byteenable[3]}}, {8{core_byteenable[2]}}, {8{core_byteenable[1]}}, {8{core_byteenable[0]}}}; - assign line_mask = {mask3, mask2, mask1, mask0}; + assign line_mask = {mask3, mask2, mask1, mask0}; // Máscara para toda la línea assign core_data_wr = (core_writedata_line & line_mask) | (data_rd & ~line_mask); always_comb begin @@ -38,6 +41,7 @@ module cache_offsets be1 = 0; be0 = 0; + // Elegir la word que se va a retornar según el valor de offset unique case (core_offset) 2'b00: begin be0 = core_byteenable; |
