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# 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."
}
}
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