| 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 | */ |
| Russell King | 78ff18a | 2006-01-03 17:39:34 +0000 | [diff] [blame] | 10 | #include <asm/hardware.h> |
| Russell King | fa0fe48 | 2006-01-13 21:30:48 +0000 | [diff] [blame] | 11 | #include <asm/hardware/vic.h> |
| Russell King | 78ff18a | 2006-01-03 17:39:34 +0000 | [diff] [blame] | 12 | |
| 13 | .macro disable_fiq |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | .endm |
| 15 | |
| Dan Williams | f80dff9 | 2007-02-16 22:16:32 +0100 | [diff] [blame] | 16 | .macro get_irqnr_preamble, base, tmp |
| Russell King | 641e791 | 2007-05-12 15:25:50 +0100 | [diff] [blame] | 17 | ldr \base, =IO_ADDRESS(VERSATILE_VIC_BASE) |
| Dan Williams | f80dff9 | 2007-02-16 22:16:32 +0100 | [diff] [blame] | 18 | .endm |
| 19 | |
| 20 | .macro arch_ret_to_user, tmp1, tmp2 |
| 21 | .endm |
| 22 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status |
| 25 | mov \irqnr, #0 |
| 26 | teq \irqstat, #0 |
| 27 | beq 1003f |
| 28 | |
| 29 | 1001: tst \irqstat, #15 |
| 30 | bne 1002f |
| 31 | add \irqnr, \irqnr, #4 |
| 32 | movs \irqstat, \irqstat, lsr #4 |
| 33 | bne 1001b |
| 34 | 1002: tst \irqstat, #1 |
| 35 | bne 1003f |
| 36 | add \irqnr, \irqnr, #1 |
| 37 | movs \irqstat, \irqstat, lsr #1 |
| 38 | bne 1002b |
| 39 | 1003: /* EQ will be set if no irqs pending */ |
| 40 | |
| 41 | @ clz \irqnr, \irqstat |
| 42 | @1003: /* EQ will be set if we reach MAXIRQNUM */ |
| 43 | .endm |
| 44 | |