tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#include <asm/arch/irqs.h>
11
12 .macro disable_fiq
13 .endm
14
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
521001:
53 .endm
54