Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * include/asm-arm/arch-versatile/entry-macro.S
3 *
4 * Low-level IRQ helper macros for Versatile 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/hardware.h>
11#include <asm/hardware/vic.h>
12
13 .macro disable_fiq
14 .endm
15
16 .macro get_irqnr_preamble, base, tmp
17 ldr \base, =IO_ADDRESS(VERSATILE_VIC_BASE)
18 .endm
19
20 .macro arch_ret_to_user, tmp1, tmp2
21 .endm
22
23 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
24 ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status
25 mov \irqnr, #0
26 teq \irqstat, #0
27 beq 1003f
28
291001: tst \irqstat, #15
30 bne 1002f
31 add \irqnr, \irqnr, #4
32 movs \irqstat, \irqstat, lsr #4
33 bne 1001b
341002: tst \irqstat, #1
35 bne 1003f
36 add \irqnr, \irqnr, #1
37 movs \irqstat, \irqstat, lsr #1
38 bne 1002b
391003: /* EQ will be set if no irqs pending */
40
41@ clz \irqnr, \irqstat
42@1003: /* EQ will be set if we reach MAXIRQNUM */
43 .endm
44