| Dan Williams | 285f5fa | 2006-12-07 02:59:39 +0100 | [diff] [blame] | 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 disable_fiq |
| 20 | .endm |
| 21 | |
| 22 | /* |
| 23 | * Note: a 1-cycle window exists where iintvec will return the value |
| 24 | * of iintbase, so we explicitly check for "bad zeros" |
| 25 | */ |
| 26 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 27 | mrc p15, 0, \tmp, c15, c1, 0 |
| 28 | orr \tmp, \tmp, #(1 << 6) |
| 29 | mcr p15, 0, \tmp, c15, c1, 0 @ Enable cp6 access |
| 30 | |
| 31 | mrc p6, 0, \irqnr, c3, c2, 0 @ Read IINTVEC |
| 32 | cmp \irqnr, #0 |
| 33 | mrceq p6, 0, \irqnr, c3, c2, 0 @ Re-read on potentially bad zero |
| 34 | adds \irqstat, \irqnr, #1 @ Check for 0xffffffff |
| 35 | movne \irqnr, \irqnr, lsr #2 @ Convert to irqnr |
| 36 | |
| 37 | biceq \tmp, \tmp, #(1 << 6) |
| 38 | mcreq p15, 0, \tmp, c15, c1, 0 @ Disable cp6 access if no more interrupts |
| 39 | .endm |