`tRFCb` is not applied for `BANK_LEVEL_STAGGERED` refresh policy

[channoh]

It seems like tRFCb for BANK_LEVEL_STAGGERED refresh policy is not applied. Timing parameters for it are defined at timing.cc:225, but the one of them, same_rank, is not used at UpdateTiming() in channel_state.cc.

In my opinion, the same_rank at timing.cc:225 should be same_bank. Please confirm it.

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Example

• Config: configs/DDR4_8Gb_x8_3200.ini with BANK_LEVEL_STAGGERED as refresh policy. (tRFCb = 20)
• Trace

  0x20000000 READ  1950
  

• Command trace (vanilla version)

  1950               refresh_bank          -1   0   0   0     -0x1     -0x1
  1952               activate               0   0   0   0    0x800      0x0 ## it should be issued at 1970 (= 1950 + 20)
  1974               read                   0   0   0   0    0x800      0x0
  

• Command trace (modifying same_bank to same_rank)

  1950               refresh_bank          -1   0   0   0     -0x1     -0x1
  1970               activate               0   0   0   0    0x800      0x0
  1992               read                   0   0   0   0    0x800      0x0