Introduce tcl config files for Synopsys HSDK board

[fw/openocd] / tcl / cpu / arc / hs.tcl

diff --git a/tcl/cpu/arc/hs.tcl b/tcl/cpu/arc/hs.tcl
new file mode 100644 (file)
index 0000000..f39f2a7
--- /dev/null
+++ b/tcl/cpu/arc/hs.tcl
@@ -0,0 +1,58 @@
+#  Copyright (C) 2015, 2020 Synopsys, Inc.
+#  Anton Kolesov <anton.kolesov@synopsys.com>
+#  Didin Evgeniy <didin@synopsys.com>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+source [find cpu/arc/v2.tcl]
+
+proc arc_hs_examine_target { target } {
+       # Will set current target for us.
+       arc_v2_examine_target $target
+}
+
+proc arc_hs_init_regs { } {
+       arc_v2_init_regs
+
+       [target current] configure \
+               -event examine-end "arc_hs_examine_target [target current]"
+}
+
+# Scripts in "target" folder should call this function instead of direct
+# invocation of arc_common_reset.
+proc arc_hs_reset { {target ""} } {
+       arc_v2_reset $target
+
+       # Invalidate L2 cache if there is one.
+       set l2_config [$target arc jtag get-aux-reg 0x901]
+       # Will return 0, if cache is not present and register doesn't exist.
+       set l2_ctrl [$target arc jtag get-aux-reg 0x903]
+       if { ($l2_config != 0) && (($l2_ctrl & 1) == 0) } {
+               puts "L2 cache is present and not disabled"
+
+               # Wait until BUSY bit is 0.
+               puts "Invalidating L2 cache..."
+               $target arc jtag set-aux-reg 0x905 1
+               # Dummy read of SLC_AUX_CACHE_CTRL bit, as described in:
+               # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/arch/arc?id=c70c473396cbdec1168a6eff60e13029c0916854
+               set l2_ctrl [$target arc jtag get-aux-reg 0x903]
+               set l2_ctrl [$target arc jtag get-aux-reg 0x903]
+               while { ($l2_ctrl & 0x100) != 0 } {
+                       set l2_ctrl [$target arc jtag get-aux-reg 0x903]
+               }
+
+               # Flush cache if needed. If SLC_AUX_CACHE_CTRL.IM is 1, then invalidate
+               # operation already flushed everything.
+               if { ($l2_ctrl & 0x40) == 0 } {
+                       puts "Flushing L2 cache..."
+                       $target arc jtag set-aux-reg 0x904 1
+                       set l2_ctrl [$target arc jtag get-aux-reg 0x903]
+                       set l2_ctrl [$target arc jtag get-aux-reg 0x903]
+                       while { [expr $l2_ctrl & 0x100] != 0 } {
+                               set l2_ctrl [$target arc jtag get-aux-reg 0x903]
+                       }
+               }
+
+               puts "L2 cache has been flushed and invalidated."
+       }
+}