| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-arm/arch-ixp2000/entry-macro.S |
| 3 | * |
| 4 | * Low-level IRQ helper macros for IXP2000-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 | |
| 11 | .macro disable_fiq |
| 12 | .endm |
| 13 | |
| 14 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 15 | |
| 16 | mov \irqnr, #0x0 @clear out irqnr as default |
| 17 | mov \base, #0xfe000000 |
| 18 | orr \base, \base, #0x00e00000 |
| 19 | orr \base, \base, #0x08 |
| 20 | ldr \irqstat, [\base] @ get interrupts |
| 21 | |
| 22 | cmp \irqstat, #0 |
| 23 | beq 1001f |
| 24 | |
| 25 | clz \irqnr, \irqstat |
| 26 | mov \base, #31 |
| 27 | subs \irqnr, \base, \irqnr |
| 28 | |
| 29 | /* |
| 30 | * We handle PCIA and PCIB here so we don't have an |
| 31 | * extra layer of code just to check these two bits. |
| 32 | */ |
| 33 | cmp \irqnr, #IRQ_IXP2000_PCI |
| 34 | bne 1001f |
| 35 | |
| 36 | mov \base, #0xfe000000 |
| 37 | orr \base, \base, #0x00c00000 |
| 38 | orr \base, \base, #0x00000100 |
| 39 | orr \base, \base, #0x00000058 |
| 40 | ldr \irqstat, [\base] |
| 41 | |
| 42 | mov \tmp, #(1<<26) |
| 43 | tst \irqstat, \tmp |
| 44 | movne \irqnr, #IRQ_IXP2000_PCIA |
| 45 | bne 1001f |
| 46 | |
| 47 | mov \tmp, #(1<<27) |
| 48 | tst \irqstat, \tmp |
| 49 | movne \irqnr, #IRQ_IXP2000_PCIB |
| 50 | |
| 51 | 1001: |
| 52 | .endm |
| 53 | |