2 * Copyright (C) 2007 Lennert Buytenhek <buytenh@wantstofly.org>
3 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <mach/hardware.h>
14 #define AVIC_NIMASK 0x04
16 @ this macro disables fast irq (not implemented)
20 .macro get_irqnr_preamble, base, tmp
23 #ifdef CONFIG_MXC_IRQ_PRIOR
24 ldr r4, [\base, #AVIC_NIMASK]
28 .macro arch_ret_to_user, tmp1, tmp2
31 @ this macro checks which interrupt occured
32 @ and returns its number in irqnr
33 @ and returns if an interrupt occured in irqstat
34 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
35 @ Load offset & priority of the highest priority
36 @ interrupt pending from AVIC_NIVECSR
37 ldr \irqstat, [\base, #0x40]
38 @ Shift to get the decoded IRQ number, using ASR so
39 @ 'no interrupt pending' becomes 0xffffffff
40 mov \irqnr, \irqstat, asr #16
41 @ set zero flag if IRQ + 1 == 0
43 #ifdef CONFIG_MXC_IRQ_PRIOR
44 bicne \tmp, \irqstat, #0xFFFFFFE0
45 strne \tmp, [\base, #AVIC_NIMASK]
46 streq r4, [\base, #AVIC_NIMASK]
50 @ irq priority table (not used)