44 строки
1.0 KiB
ArmAsm
44 строки
1.0 KiB
ArmAsm
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/*
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* Low-level IRQ helper macros for Nomadik platforms
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <mach/hardware.h>
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#include <mach/irqs.h>
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.macro disable_fiq
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.endm
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.macro get_irqnr_preamble, base, tmp
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ldr \base, =IO_ADDRESS(NOMADIK_IC_BASE)
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.endm
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.macro arch_ret_to_user, tmp1, tmp2
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.endm
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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/* This stanza gets the irq mask from one of two status registers */
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mov \irqnr, #0
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ldr \irqstat, [\base, #VIC_REG_IRQSR0] @ get masked status
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cmp \irqstat, #0
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bne 1001f
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add \irqnr, \irqnr, #32
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ldr \irqstat, [\base, #VIC_REG_IRQSR1] @ get masked status
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1001: tst \irqstat, #15
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bne 1002f
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add \irqnr, \irqnr, #4
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movs \irqstat, \irqstat, lsr #4
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bne 1001b
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1002: tst \irqstat, #1
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bne 1003f
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add \irqnr, \irqnr, #1
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movs \irqstat, \irqstat, lsr #1
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bne 1002b
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1003: /* EQ will be set if no irqs pending */
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.endm
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