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285f5fa7 DW |
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 | */ | |
f80dff9d DW |
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 | ||
285f5fa7 DW |
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 | |
285f5fa7 DW |
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 | |
f80dff9d | 35 | .endm |
285f5fa7 | 36 | |
f80dff9d DW |
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 | |
285f5fa7 | 42 | .endm |