kernel/head.S [343:357]:
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	/*
	 * Initialize WB, WS, and clear PS.EXCM (to allow loop instructions).
	 * Set Interrupt Level just below XCHAL_DEBUGLEVEL to allow
	 * xt-gdb to single step via DEBUG exceptions received directly
	 * by ocd.
	 */
	movi	a1, 1
	movi	a0, 0
	wsr	a1, windowstart
	wsr	a0, windowbase
	rsync

	movi	a1, LOCKLEVEL
	wsr	a1, ps
	rsync
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kernel/mxhead.S [34:48]:
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	/*
	 * Initialize WB, WS, and clear PS.EXCM (to allow loop instructions).
	 * Set Interrupt Level just below XCHAL_DEBUGLEVEL to allow
	 * xt-gdb to single step via DEBUG exceptions received directly
	 * by ocd.
	 */
	movi	a1, 1
	movi	a0, 0
	wsr	a1, windowstart
	wsr	a0, windowbase
	rsync

	movi	a1, LOCKLEVEL
	wsr	a1, ps
	rsync
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