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-rw-r--r--include/asm-arm/arch-ixp2000/entry-macro.S53
1 files changed, 53 insertions, 0 deletions
diff --git a/include/asm-arm/arch-ixp2000/entry-macro.S b/include/asm-arm/arch-ixp2000/entry-macro.S
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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
511001:
52 .endm
53