| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-ebsa110/include/mach/entry-macro.S |
| 3 | * |
| 4 | * Low-level IRQ helper macros for ebsa110 platform. |
| 5 | * |
| 6 | * This file is licensed under the terms of the GNU General Public |
| 7 | * License version 2. This program is licensed "as is" without any |
| 8 | * warranty of any kind, whether express or implied. |
| 9 | */ |
| 10 | |
| 11 | |
| 12 | |
| 13 | #define IRQ_STAT 0xff000000 /* read */ |
| 14 | |
| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 15 | .macro get_irqnr_preamble, base, tmp |
| 16 | mov \base, #IRQ_STAT |
| 17 | .endm |
| 18 | |
| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 19 | .macro get_irqnr_and_base, irqnr, stat, base, tmp |
| 20 | ldrb \stat, [\base] @ get interrupts |
| 21 | mov \irqnr, #0 |
| 22 | tst \stat, #15 |
| 23 | addeq \irqnr, \irqnr, #4 |
| 24 | moveq \stat, \stat, lsr #4 |
| 25 | tst \stat, #3 |
| 26 | addeq \irqnr, \irqnr, #2 |
| 27 | moveq \stat, \stat, lsr #2 |
| 28 | tst \stat, #1 |
| 29 | addeq \irqnr, \irqnr, #1 |
| 30 | moveq \stat, \stat, lsr #1 |
| 31 | tst \stat, #1 @ bit 0 should be set |
| 32 | .endm |
| 33 | |