| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * include/asm-arm/arch-versatile/entry-macro.S |
| 3 | * |
| 4 | * Low-level IRQ helper macros for Versatile platforms |
| 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 | .macro disable_fiq |
| 11 | .endm |
| 12 | |
| 13 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 14 | ldr \base, =IO_ADDRESS(VERSATILE_VIC_BASE) |
| 15 | ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status |
| 16 | mov \irqnr, #0 |
| 17 | teq \irqstat, #0 |
| 18 | beq 1003f |
| 19 | |
| 20 | 1001: tst \irqstat, #15 |
| 21 | bne 1002f |
| 22 | add \irqnr, \irqnr, #4 |
| 23 | movs \irqstat, \irqstat, lsr #4 |
| 24 | bne 1001b |
| 25 | 1002: tst \irqstat, #1 |
| 26 | bne 1003f |
| 27 | add \irqnr, \irqnr, #1 |
| 28 | movs \irqstat, \irqstat, lsr #1 |
| 29 | bne 1002b |
| 30 | 1003: /* EQ will be set if no irqs pending */ |
| 31 | |
| 32 | @ clz \irqnr, \irqstat |
| 33 | @1003: /* EQ will be set if we reach MAXIRQNUM */ |
| 34 | .endm |
| 35 | |