target/imx8qm: Initial support

Chip is similar to imx8x series but has different cores at different
addresses.

Support for reduced versions is not yet available.

Tested on imx8qm-mek board

Change-Id: Ia34a80d561ab2849a570d8c375b936a45cbf45ca
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Oliver Graute <oliver.graute@kococonnector.com>
Reviewed-on: http://openocd.zylin.com/5042
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

tcl/target/imx8qm.cfg

@@ -0,0 +1,89 @@
+#
+# NXP i.MX8QuadMax
+#
+
+if { [info exists CHIPNAME] } {
+   set  _CHIPNAME $CHIPNAME
+} else {
+   set  _CHIPNAME imx8qm
+}
+
+# CoreSight Debug Access Port (DAP)
+if { [info exists DAP_TAPID] } {
+    set _DAP_TAPID $DAP_TAPID
+} else {
+    # TAPID is from FreeScale!
+    set _DAP_TAPID 0x1890101d
+}
+
+jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x01 -irmask 0x0f \
+        -expected-id $_DAP_TAPID
+
+dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
+
+# AXI: Main SOC bus on AP #0
+target create ${_CHIPNAME}.axi mem_ap -dap ${_CHIPNAME}.dap -ap-num 0
+
+# 4x Cortex-A53 on AP #6
+set _A53_DBGBASE {0x80410000 0x80510000 0x80610000 0x80710000}
+set _A53_CTIBASE {0x80420000 0x80520000 0x80620000 0x80720000}
+
+cti create $_CHIPNAME.a53_cti.0 -dap $_CHIPNAME.dap \
+            -ap-num 6 -baseaddr [lindex $_A53_CTIBASE 0]
+cti create $_CHIPNAME.a53_cti.1 -dap $_CHIPNAME.dap \
+            -ap-num 6 -baseaddr [lindex $_A53_CTIBASE 1]
+cti create $_CHIPNAME.a53_cti.2 -dap $_CHIPNAME.dap \
+            -ap-num 6 -baseaddr [lindex $_A53_CTIBASE 2]
+cti create $_CHIPNAME.a53_cti.3 -dap $_CHIPNAME.dap \
+            -ap-num 6 -baseaddr [lindex $_A53_CTIBASE 3]
+target create $_CHIPNAME.a53.0 aarch64 -dap $_CHIPNAME.dap \
+            -cti $_CHIPNAME.a53_cti.0 -dbgbase [lindex $_A53_DBGBASE 0]
+target create $_CHIPNAME.a53.1 aarch64 -dap $_CHIPNAME.dap \
+            -cti $_CHIPNAME.a53_cti.1 -dbgbase [lindex $_A53_DBGBASE 1] -defer-examine
+target create $_CHIPNAME.a53.2 aarch64 -dap $_CHIPNAME.dap \
+            -cti $_CHIPNAME.a53_cti.2 -dbgbase [lindex $_A53_DBGBASE 2] -defer-examine
+target create $_CHIPNAME.a53.3 aarch64 -dap $_CHIPNAME.dap \
+            -cti $_CHIPNAME.a53_cti.3 -dbgbase [lindex $_A53_DBGBASE 3] -defer-examine
+
+# 2x Cortex-A72 on AP #6
+set _A72_DBGBASE {0x80210000 0x80310000}
+set _A72_CTIBASE {0x80220000 0x80220000}
+
+cti create $_CHIPNAME.a72_cti.0 -dap $_CHIPNAME.dap \
+            -ap-num 6 -baseaddr [lindex $_A72_CTIBASE 0]
+cti create $_CHIPNAME.a72_cti.1 -dap $_CHIPNAME.dap \
+            -ap-num 6 -baseaddr [lindex $_A72_CTIBASE 1]
+target create $_CHIPNAME.a72.0 aarch64 -dap $_CHIPNAME.dap \
+            -cti $_CHIPNAME.a72_cti.0 -dbgbase [lindex $_A72_DBGBASE 0] -defer-examine
+target create $_CHIPNAME.a72.1 aarch64 -dap $_CHIPNAME.dap \
+            -cti $_CHIPNAME.a72_cti.1 -dbgbase [lindex $_A72_DBGBASE 1] -defer-examine
+
+# All Cortex-A in SMP
+target smp \
+        $_CHIPNAME.a53.0 \
+        $_CHIPNAME.a53.1 \
+        $_CHIPNAME.a53.2 \
+        $_CHIPNAME.a53.3 \
+        $_CHIPNAME.a72.0 \
+        $_CHIPNAME.a72.1
+
+# SCU: Cortex-M4 core
+# always running imx SC firmware
+target create ${_CHIPNAME}.scu cortex_m -dap ${_CHIPNAME}.dap -ap-num 1
+
+# AHB from SCU perspective
+target create ${_CHIPNAME}.scu_ahb mem_ap -dap ${_CHIPNAME}.dap -ap-num 4
+
+# Cortex-M4 M4_0 core on AP #2 (default off)
+target create ${_CHIPNAME}.m4_0 cortex_m -dap ${_CHIPNAME}.dap -ap-num 2 \
+        -defer-examine
+
+# Cortex-M4 M4_1 core on AP #3 (default off)
+target create ${_CHIPNAME}.m4_1 cortex_m -dap ${_CHIPNAME}.dap -ap-num 3 \
+        -defer-examine
+
+# Debug APB bus
+target create ${_CHIPNAME}.apb mem_ap -dap ${_CHIPNAME}.dap -ap-num 6
+
+# Default target is boot core a53.0
+targets $_CHIPNAME.a53.0