87 lines
2.4 KiB
INI
87 lines
2.4 KiB
INI
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#Written by: Michael Schwingen <rincewind@discworld.dascon.de>
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if { [info exists CHIPNAME] } {
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set _CHIPNAME $CHIPNAME
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} else {
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set _CHIPNAME xba_reva3
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}
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if { [info exists ENDIAN] } {
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set _ENDIAN $ENDIAN
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} else {
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# default to big endian
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set _ENDIAN big
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}
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if { [info exists CPUTAPID ] } {
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set _CPUTAPID $CPUTAPID
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} else {
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# force an error till we get a good number
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set _CPUTAPID 0xffffffff
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}
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reset_config trst_and_srst separate
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jtag_nsrst_delay 100
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jtag_ntrst_delay 100
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#jtag scan chain
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jtag newtap $_CHIPNAME cpu -irlen 7 -ircapture 0x1 -irmask 0x7f -expected-id $_CPUTAPID
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set _TARGETNAME [format "%s.cpu" $_CHIPNAME]
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target create $_TARGETNAME xscale -endian $_ENDIAN -chain-position $_TARGETNAME -variant ixp42x
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$_TARGETNAME configure -event reset-init {
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#############################################################################
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# setup expansion bus CS, disable external wdt
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#############################################################################
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mww 0xc4000000 0xbd113842 #CS0 : Flash, write enabled @0x50000000
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mww 0xc4000004 0x94d10013 #CS1
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mww 0xc4000008 0x95960003 #CS2
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mww 0xc400000c 0x00000000 #CS3
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mww 0xc4000010 0x80900003 #CS4
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mww 0xc4000014 0x9d520003 #CS5
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mww 0xc4000018 0x81860001 #CS6
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mww 0xc400001c 0x80900003 #CS7
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#############################################################################
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# init SDRAM controller: 16MB, one bank, CL3
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#############################################################################
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mww 0xCC000000 0x2A # SDRAM_CFG: 64MBit, CL3
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mww 0xCC000004 0 # disable refresh
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mww 0xCC000008 3 # NOP
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sleep 100
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mww 0xCC000004 2100 # set refresh counter
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mww 0xCC000008 2 # Precharge All Banks
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sleep 100
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mww 0xCC000008 4 # Auto Refresh
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mww 0xCC000008 4 # Auto Refresh
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mww 0xCC000008 4 # Auto Refresh
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mww 0xCC000008 4 # Auto Refresh
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mww 0xCC000008 4 # Auto Refresh
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mww 0xCC000008 4 # Auto Refresh
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mww 0xCC000008 4 # Auto Refresh
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mww 0xCC000008 4 # Auto Refresh
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mww 0xCC000008 1 # Mode Select CL3
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#mww 0xc4000020 0xffffee # CFG0: remove expansion bus boot flash
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#mirror at 0x00000000
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#big endian
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reg XSCALE_CTRL 0xF8
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#
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# detect flash
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#
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flash probe 0
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}
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$_TARGETNAME configure -work-area-virt 0 -work-area-phys 0x20010000 -work-area-size 0x8060 -work-area-backup 0
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flash bank cfi 0x50000000 0x400000 2 2 0
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init
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reset init
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# set big endian mode
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reg XSCALE_CTRL 0xF8
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