Merge branch 'master'
[linux-2.6] / include / asm-arm / arch-ixp2000 / entry-macro.S
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