2 * iop13xx low level irq macros
3 * Copyright (c) 2005-2006, Intel Corporation.
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.
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
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.
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
26 * Note: a 1-cycle window exists where iintvec will return the value
27 * of iintbase, so we explicitly check for "bad zeros"
29 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
30 mrc p6, 0, \irqnr, c3, c2, 0 @ Read IINTVEC
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
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