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 #define AVIC_NIMASK 0x04
14 @ this macro disables fast irq (not implemented)
18 .macro get_irqnr_preamble, base, tmp
19 ldr \base, =AVIC_IO_ADDRESS(AVIC_BASE_ADDR)
20 #ifdef CONFIG_MXC_IRQ_PRIOR
21 ldr r4, [\base, #AVIC_NIMASK]
25 .macro arch_ret_to_user, tmp1, tmp2
28 @ this macro checks which interrupt occured
29 @ and returns its number in irqnr
30 @ and returns if an interrupt occured in irqstat
31 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
32 @ Load offset & priority of the highest priority
33 @ interrupt pending from AVIC_NIVECSR
34 ldr \irqstat, [\base, #0x40]
35 @ Shift to get the decoded IRQ number, using ASR so
36 @ 'no interrupt pending' becomes 0xffffffff
37 mov \irqnr, \irqstat, asr #16
38 @ set zero flag if IRQ + 1 == 0
40 #ifdef CONFIG_MXC_IRQ_PRIOR
41 bicne \tmp, \irqstat, #0xFFFFFFE0
42 strne \tmp, [\base, #AVIC_NIMASK]
43 streq r4, [\base, #AVIC_NIMASK]
47 @ irq priority table (not used)