projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| a09e64fb | 2 | * arch/arm/mach-ixp2000/include/mach/entry-macro.S |
| 1da177e4 LT |
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 | */ | |
| a09e64fb | 10 | #include <mach/irqs.h> |
| 1da177e4 | 11 | |
| f80dff9d DW |
12 | .macro get_irqnr_preamble, base, tmp |
| 13 | .endm | |
| 14 | ||
| 1da177e4 LT |
15 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 16 | ||
| 17 | mov \irqnr, #0x0 @clear out irqnr as default | |
| 18 | mov \base, #0xfe000000 | |
| 19 | orr \base, \base, #0x00e00000 | |
| 20 | orr \base, \base, #0x08 | |
| 21 | ldr \irqstat, [\base] @ get interrupts | |
| 22 | ||
| 23 | cmp \irqstat, #0 | |
| 24 | beq 1001f | |
| 25 | ||
| 26 | clz \irqnr, \irqstat | |
| 27 | mov \base, #31 | |
| 28 | subs \irqnr, \base, \irqnr | |
| 29 | ||
| 30 | /* | |
| 31 | * We handle PCIA and PCIB here so we don't have an | |
| 32 | * extra layer of code just to check these two bits. | |
| 33 | */ | |
| 34 | cmp \irqnr, #IRQ_IXP2000_PCI | |
| 35 | bne 1001f | |
| 36 | ||
| 37 | mov \base, #0xfe000000 | |
| 38 | orr \base, \base, #0x00c00000 | |
| 39 | orr \base, \base, #0x00000100 | |
| 40 | orr \base, \base, #0x00000058 | |
| 41 | ldr \irqstat, [\base] | |
| 42 | ||
| 43 | mov \tmp, #(1<<26) | |
| 44 | tst \irqstat, \tmp | |
| 45 | movne \irqnr, #IRQ_IXP2000_PCIA | |
| 46 | bne 1001f | |
| 47 | ||
| 48 | mov \tmp, #(1<<27) | |
| 49 | tst \irqstat, \tmp | |
| 50 | movne \irqnr, #IRQ_IXP2000_PCIB | |
| 51 | ||
| 52 | 1001: | |
| 53 | .endm | |
| 54 |