| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * arch/arm/mach-kirkwood/include/mach/entry-macro.S |
| 3 | * |
| 4 | * Low-level IRQ helper macros for Marvell Kirkwood 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 | |
| 11 | #include <mach/kirkwood.h> |
| 12 | |
| 13 | .macro disable_fiq |
| 14 | .endm |
| 15 | |
| 16 | .macro arch_ret_to_user, tmp1, tmp2 |
| 17 | .endm |
| 18 | |
| 19 | .macro get_irqnr_preamble, base, tmp |
| 20 | ldr \base, =IRQ_VIRT_BASE |
| 21 | .endm |
| 22 | |
| 23 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 24 | @ check low interrupts |
| 25 | ldr \irqstat, [\base, #IRQ_CAUSE_LOW_OFF] |
| 26 | ldr \tmp, [\base, #IRQ_MASK_LOW_OFF] |
| 27 | mov \irqnr, #31 |
| 28 | ands \irqstat, \irqstat, \tmp |
| 29 | bne 1001f |
| 30 | |
| 31 | @ if no low interrupts set, check high interrupts |
| 32 | ldr \irqstat, [\base, #IRQ_CAUSE_HIGH_OFF] |
| 33 | ldr \tmp, [\base, #IRQ_MASK_HIGH_OFF] |
| 34 | mov \irqnr, #63 |
| 35 | ands \irqstat, \irqstat, \tmp |
| 36 | |
| 37 | @ find first active interrupt source |
| 38 | 1001: clzne \irqstat, \irqstat |
| 39 | subne \irqnr, \irqnr, \irqstat |
| 40 | .endm |