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
21 ldr \base, =AVIC_IO_ADDRESS(AVIC_BASE_ADDR)
22 #ifdef CONFIG_MXC_IRQ_PRIOR
23 ldr r4, [\base, #AVIC_NIMASK]
27 .macro arch_ret_to_user, tmp1, tmp2
30 @ this macro checks which interrupt occured
31 @ and returns its number in irqnr
32 @ and returns if an interrupt occured in irqstat
33 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
34 @ Load offset & priority of the highest priority
35 @ interrupt pending from AVIC_NIVECSR
36 ldr \irqstat, [\base, #0x40]
37 @ Shift to get the decoded IRQ number, using ASR so
38 @ 'no interrupt pending' becomes 0xffffffff
39 mov \irqnr, \irqstat, asr #16
40 @ set zero flag if IRQ + 1 == 0
42 #ifdef CONFIG_MXC_IRQ_PRIOR
43 bicne \tmp, \irqstat, #0xFFFFFFE0
44 strne \tmp, [\base, #AVIC_NIMASK]
45 streq r4, [\base, #AVIC_NIMASK]
49 @ irq priority table (not used)