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-imx/entry-macro.S
3 *
4 * Low-level IRQ helper macros for iMX-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/hardware.h>
11
12 .macro disable_fiq
13 .endm
14
15 .macro get_irqnr_preamble, base, tmp
16 .endm
17
18 .macro arch_ret_to_user, tmp1, tmp2
19 .endm
20
21#define AITC_NIVECSR 0x40
22 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
23 ldr \base, =IO_ADDRESS(IMX_AITC_BASE)
24 @ Load offset & priority of the highest priority
25 @ interrupt pending.
26 ldr \irqstat, [\base, #AITC_NIVECSR]
27 @ Shift off the priority leaving the offset or
28 @ "interrupt number", use arithmetic shift to
29 @ transform illegal source (0xffff) as -1
30 mov \irqnr, \irqstat, asr #16
31 adds \tmp, \irqnr, #1
32 .endm