riscv-openocd/tcl/target/imx31.cfg

# imx31 config
#

reset_config trst_and_srst

if { [info exists CHIPNAME] } {	
   set  _CHIPNAME $CHIPNAME    
} else {	 
   set  _CHIPNAME imx31
}

if { [info exists ENDIAN] } {	
   set  _ENDIAN $ENDIAN    
} else {	 
   set  _ENDIAN little
}

if { [info exists CPUTAPID ] } {
   set _CPUTAPID $CPUTAPID
} else {
   set _CPUTAPID 0x07b3601d
}

if { [info exists SDMATAPID ] } {
   set _SDMATAPID $SDMATAPID
} else {
   set _SDMATAPID 0x2190101d
}

#========================================
# The "system jtag controller" 
# IMX31 reference manual, page 6-28 - figure 6-14
if { [info exists SJCTAPID ] } {
   set _SJCTAPID $SJCTAPID
} else {
   set _SJCTAPID 0x2b900f0f
}
jtag newtap $_CHIPNAME sjc -irlen 4 -ircapture 0x0 -irmask 0x0 -expected-id $_SJCTAPID

# The "SDMA" - <S>mart <DMA> controller debug tap
# Based on some IO pins - this can be disabled & removed
# See diagram: 6-14
#   SIGNAL NAME:
#    SJC_MOD - controls multiplexer - disables ARM1136
#    SDMA_BYPASS - disables SDMA    - 
#  
# Per ARM: DDI0211J_arm1136_r1p5_trm.pdf - the ARM 1136 as a 5 bit IR register
jtag newtap $_CHIPNAME cpu -irlen 5 -ircapture 0x1 -irmask 0x1f -expected-id $_CPUTAPID

# No IDCODE for this TAP
jtag newtap $_CHIPNAME whatchacallit -irlen 4 -ircapture 0 -irmask 0xf -expected-id 0x0

# Per section 40.17.1, table 40-85 the IR register is 4 bits
# But this conflicts with Diagram 6-13, "3bits ir and drs"
jtag newtap $_CHIPNAME smda -irlen 5 -ircapture 0x1 -irmask 0x1f -expected-id $_SDMATAPID

set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME arm11 -endian $_ENDIAN -chain-position $_TARGETNAME


proc power_restore {} { puts "Sensed power restore. No action." } 
proc srst_deasserted {} { puts "Sensed nSRST deasserted. No action." }