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-integrator/entry-macro.S
3 *
4 * Low-level IRQ helper macros for Integrator 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/arch/irqs.h>
12
13 .macro disable_fiq
14 .endm
15
16 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
17/* FIXME: should not be using soo many LDRs here */
18 ldr \base, =IO_ADDRESS(INTEGRATOR_IC_BASE)
19 mov \irqnr, #IRQ_PIC_START
20 ldr \irqstat, [\base, #IRQ_STATUS] @ get masked status
21 ldr \base, =IO_ADDRESS(INTEGRATOR_HDR_BASE)
22 teq \irqstat, #0
23 ldreq \irqstat, [\base, #(INTEGRATOR_HDR_IC_OFFSET+IRQ_STATUS)]
24 moveq \irqnr, #IRQ_CIC_START
25
261001: tst \irqstat, #15
27 bne 1002f
28 add \irqnr, \irqnr, #4
29 movs \irqstat, \irqstat, lsr #4
30 bne 1001b
311002: tst \irqstat, #1
32 bne 1003f
33 add \irqnr, \irqnr, #1
34 movs \irqstat, \irqstat, lsr #1
35 bne 1002b
361003: /* EQ will be set if no irqs pending */
37 .endm
38