Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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 .macro disable_fiq
11 .endm
12
13 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
14 ldr \base, =IO_ADDRESS(VERSATILE_VIC_BASE)
15 ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status
16 mov \irqnr, #0
17 teq \irqstat, #0
18 beq 1003f
19
201001: tst \irqstat, #15
21 bne 1002f
22 add \irqnr, \irqnr, #4
23 movs \irqstat, \irqstat, lsr #4
24 bne 1001b
251002: tst \irqstat, #1
26 bne 1003f
27 add \irqnr, \irqnr, #1
28 movs \irqstat, \irqstat, lsr #1
29 bne 1002b
301003: /* EQ will be set if no irqs pending */
31
32@ clz \irqnr, \irqstat
33@1003: /* EQ will be set if we reach MAXIRQNUM */
34 .endm
35