1/* 2 * iop13xx low level irq macros 3 * Copyright (c) 2005-2006, Intel Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple 16 * Place - Suite 330, Boston, MA 02111-1307 USA. 17 * 18 */ 19 .macro get_irqnr_preamble, base, tmp 20 mrc p15, 0, \tmp, c15, c1, 0 21 orr \tmp, \tmp, #(1 << 6) 22 mcr p15, 0, \tmp, c15, c1, 0 @ Enable cp6 access 23 .endm 24 25 /* 26 * Note: a 1-cycle window exists where iintvec will return the value 27 * of iintbase, so we explicitly check for "bad zeros" 28 */ 29 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp 30 mrc p6, 0, \irqnr, c3, c2, 0 @ Read IINTVEC 31 cmp \irqnr, #0 32 mrceq p6, 0, \irqnr, c3, c2, 0 @ Re-read on potentially bad zero 33 adds \irqstat, \irqnr, #1 @ Check for 0xffffffff 34 movne \irqnr, \irqnr, lsr #2 @ Convert to irqnr 35 .endm 36 37 .macro arch_ret_to_user, tmp1, tmp2 38 mrc p15, 0, \tmp1, c15, c1, 0 39 ands \tmp2, \tmp1, #(1 << 6) 40 bicne \tmp1, \tmp1, #(1 << 6) 41 mcrne p15, 0, \tmp1, c15, c1, 0 @ Disable cp6 access 42 .endm 43