mem: Remove DRAMSim2 DDR3 configuration

This patch prunes the DDR3 config that was initially created to match
the default config of DRAMSim2. The config is not complete as it is,
and to avoid having to maintain it, the easiest way forward is to
simply prune it. Going forward we are adding power number etc to the
other configurations.

diff --git a/src/mem/DRAMCtrl.py b/src/mem/DRAMCtrl.py
index 02fa4fa46c5af51e0022f750aa5efd86c7b1e9ff..3b0696bd8b3f46ee4132af76966190c0b48f5ecb 100644 (file)
--- a/src/mem/DRAMCtrl.py
+++ b/src/mem/DRAMCtrl.py
@@ -348,69 +348,6 @@ class DDR4_2400_x64(DRAMCtrl):
     # <=85C, half for >85C
     tREFI = '7.8us'
 
-# A single DDR3 x64 interface (one command and address bus), with
-# default timings based on DDR3-1333 4 Gbit parts in an 8x8
-# configuration, which would amount to 4 GByte of memory.  This
-# configuration is primarily for comparing with DRAMSim2, and all the
-# parameters except ranks_per_channel are based on the DRAMSim2 config
-# file DDR3_micron_32M_8B_x8_sg15.ini. Note that ranks_per_channel has
-# to be manually set, depending on size of the memory to be
-# simulated. By default DRAMSim2 has 2048MB of memory with a single
-# rank. Therefore for 4 GByte memory, set ranks_per_channel = 2
-class DDR3_1333_x64_DRAMSim2(DRAMCtrl):
-    # 8x8 configuration, 8 devices each with an 8-bit interface
-    device_bus_width = 8
-
-    # DDR3 is a BL8 device
-    burst_length = 8
-
-    # Each device has a page (row buffer) size of 1KB
-    # (this depends on the memory density)
-    device_rowbuffer_size = '1kB'
-
-    # 8x8 configuration, so 8 devices
-    devices_per_rank = 8
-
-    # Use two ranks
-    ranks_per_channel = 2
-
-    # DDR3 has 8 banks in all configurations
-    banks_per_rank = 8
-
-    # 666 MHs
-    tCK = '1.5ns'
-
-    tRCD = '15ns'
-    tCL = '15ns'
-    tRP = '15ns'
-    tRAS = '36ns'
-    tWR = '15ns'
-    tRTP = '7.5ns'
-
-    # 8 beats across an x64 interface translates to 4 clocks @ 666.66 MHz.
-    # Note this is a BL8 DDR device.
-    tBURST = '6ns'
-
-    tRFC = '160ns'
-
-    # DDR3, <=85C, half for >85C
-    tREFI = '7.8us'
-
-    # Greater of 4 CK or 7.5 ns, 4 CK @ 666.66 MHz = 6 ns
-    tWTR = '7.5ns'
-
-    # Default same rank rd-to-wr bus turnaround to 2 CK, @666.66 MHz = 3 ns
-    tRTW = '3ns'
-
-    # Default different rank bus delay to 2 CK, @666.66 MHz = 3 ns
-    tCS = '3ns'
-
-    tRRD = '6.0ns'
-
-    tXAW = '30ns'
-    activation_limit = 4
-
-
 # A single LPDDR2-S4 x32 interface (one command/address bus), with
 # default timings based on a LPDDR2-1066 4 Gbit part in a 1x32
 # configuration.