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
11 .macro disable_fiq
12 .endm
13
14 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
15/* FIXME: should not be using soo many LDRs here */
16 ldr \base, =IO_ADDRESS(INTEGRATOR_IC_BASE)
17 mov \irqnr, #IRQ_PIC_START
18 ldr \irqstat, [\base, #IRQ_STATUS] @ get masked status
19 ldr \base, =IO_ADDRESS(INTEGRATOR_HDR_BASE)
20 teq \irqstat, #0
21 ldreq \irqstat, [\base, #(INTEGRATOR_HDR_IC_OFFSET+IRQ_STATUS)]
22 moveq \irqnr, #IRQ_CIC_START
23
241001: tst \irqstat, #15
25 bne 1002f
26 add \irqnr, \irqnr, #4
27 movs \irqstat, \irqstat, lsr #4
28 bne 1001b
291002: tst \irqstat, #1
30 bne 1003f
31 add \irqnr, \irqnr, #1
32 movs \irqstat, \irqstat, lsr #1
33 bne 1002b
341003: /* EQ will be set if no irqs pending */
35 .endm
36