54 lines
1.2 KiB
ArmAsm
54 lines
1.2 KiB
ArmAsm
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/*
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* linux/include/asm-arm/arch-ep93xx/entry-macro.S
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* IRQ demultiplexing for EP93xx
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*
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* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include <asm/arch/ep93xx-regs.h>
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.macro disable_fiq
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.endm
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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ldr \base, =(EP93XX_AHB_VIRT_BASE)
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orr \base, \base, #0x000b0000
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mov \irqnr, #0
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ldr \irqstat, [\base] @ lower 32 interrupts
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cmp \irqstat, #0
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bne 1001f
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eor \base, \base, #0x00070000
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ldr \irqstat, [\base] @ upper 32 interrupts
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cmp \irqstat, #0
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beq 1002f
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mov \irqnr, #0x20
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1001:
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movs \tmp, \irqstat, lsl #16
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movne \irqstat, \tmp
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addeq \irqnr, \irqnr, #16
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movs \tmp, \irqstat, lsl #8
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movne \irqstat, \tmp
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addeq \irqnr, \irqnr, #8
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movs \tmp, \irqstat, lsl #4
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movne \irqstat, \tmp
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addeq \irqnr, \irqnr, #4
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movs \tmp, \irqstat, lsl #2
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movne \irqstat, \tmp
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addeq \irqnr, \irqnr, #2
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movs \tmp, \irqstat, lsl #1
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addeq \irqnr, \irqnr, #1
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orrs \base, \base, #1
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1002:
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.endm
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