| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * arch/arm/mach-ixp4xx/include/mach/entry-macro.S |
| 3 | * |
| 4 | * Low-level IRQ helper macros for IXP4xx-based 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 | #include <mach/hardware.h> |
| 11 | |
| 12 | .macro disable_fiq |
| 13 | .endm |
| 14 | |
| 15 | .macro get_irqnr_preamble, base, tmp |
| 16 | .endm |
| 17 | |
| 18 | .macro arch_ret_to_user, tmp1, tmp2 |
| 19 | .endm |
| 20 | |
| 21 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 22 | ldr \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP_OFFSET) |
| 23 | ldr \irqstat, [\irqstat] @ get interrupts |
| 24 | cmp \irqstat, #0 |
| 25 | beq 1001f @ upper IRQ? |
| 26 | clz \irqnr, \irqstat |
| 27 | mov \base, #31 |
| 28 | sub \irqnr, \base, \irqnr |
| 29 | b 1002f @ lower IRQ being |
| 30 | @ handled |
| 31 | |
| 32 | 1001: |
| 33 | /* |
| 34 | * IXP465/IXP435 has an upper IRQ status register |
| 35 | */ |
| 36 | #if defined(CONFIG_CPU_IXP46X) || defined(CONFIG_CPU_IXP43X) |
| 37 | ldr \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP2_OFFSET) |
| 38 | ldr \irqstat, [\irqstat] @ get upper interrupts |
| 39 | mov \irqnr, #63 |
| 40 | clz \irqstat, \irqstat |
| 41 | cmp \irqstat, #32 |
| 42 | subne \irqnr, \irqnr, \irqstat |
| 43 | #endif |
| 44 | 1002: |
| 45 | .endm |
| 46 | |
| 47 | |