projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| a09e64fb | 2 | * arch/arm/mach-ebsa110/include/mach/entry-macro.S |
| 1da177e4 LT |
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 | ||
| f80dff9d | 15 | .macro get_irqnr_preamble, base, tmp |
| 641e7912 | 16 | mov \base, #IRQ_STAT |
| f80dff9d DW |
17 | .endm |
| 18 | ||
| 1da177e4 | 19 | .macro get_irqnr_and_base, irqnr, stat, base, tmp |
| 1da177e4 LT |
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 |