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mww 0x90600104 0x33313333
mww 0xA0700000 0x00000001 # Enable the memory controller.
mww 0xA0700024 0x00000006 # Set the refresh counter 6
mww 0xA0700028 0x00000001 #
mww 0xA0700030 0x00000001 # Set the precharge period
mww 0xA0700034 0x00000004 # Active to precharge command period is 16 clock cycles
mww 0xA070003C 0x00000001 # tAPR
mww 0xA0700040 0x00000005 # tDAL
mww 0xA0700044 0x00000001 # tWR
mww 0xA0700048 0x00000006 # tRC 32 clock cycles
mww 0xA070004C 0x00000006 # tRFC 32 clock cycles
mww 0xA0700054 0x00000001 # tRRD
mww 0xA0700058 0x00000001 # tMRD
mww 0xA0700100 0x00004280 # Dynamic Config 0 (cs4)
mww 0xA0700120 0x00004280 # Dynamic Config 1 (cs5)
mww 0xA0700140 0x00004280 # Dynamic Config 2 (cs6)
mww 0xA0700160 0x00004280 # Dynamic Config 3 (cs7)
#
mww 0xA0700104 0x00000203 # CAS latency is 2 at 100 MHz
mww 0xA0700124 0x00000203 # CAS latency is 2 at 100 MHz
mww 0xA0700144 0x00000203 # CAS latency is 2 at 100 MHz
mww 0xA0700164 0x00000203 # CAS latency is 2 at 100 MHz
#
mww 0xA0700020 0x00000103 # issue SDRAM PALL command
#
mww 0xA0700024 0x00000001 # Set the refresh counter to be as small as possible
#
# Add some dummy writes to give the SDRAM time to settle, it needs two
# AHB clock cycles, here we poke in the debugger flag, this lets
# the software know that we are in the debugger
mww 0xA0900000 0x00000002
mww 0xA0900000 0x00000002
mww 0xA0900000 0x00000002
mww 0xA0900000 0x00000002
mww 0xA0900000 0x00000002
#
mdw 0xA0900000
mdw 0xA0900000
mdw 0xA0900000
mdw 0xA0900000
mdw 0xA0900000
#
mww 0xA0700024 0x00000030 # Set the refresh counter to 30
mww 0xA0700020 0x00000083 # Issue SDRAM MODE command
#
# Next we perform a read of RAM.
# mw = move word.
mdw 0x00022000
# mw 0x00022000:P, r3 # 22000 for cas2 latency, 32000 for cas 3
#
mww 0xA0700020 0x00000003 # issue SDRAM NORMAL command
mww 0xA0700100 0x00084280 # Enable buffer access
mww 0xA0700120 0x00084280 # Enable buffer access
mww 0xA0700140 0x00084280 # Enable buffer access
mww 0xA0700160 0x00084280 # Enable buffer access
#Set byte lane state (static mem 1)"
mww 0xA0700220, 0x00000082
#Flash Start
mww 0xA09001F8, 0x50000000
#Flash Mask Reg
mww 0xA09001FC, 0xFF000001
mww 0xA0700028, 0x00000001
# RAMAddr = 0x00020000
# RAMSize = 0x00004000
# Set the processor mode
reg cpsr 0xd3
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