58 строки
1.5 KiB
ArmAsm
58 строки
1.5 KiB
ArmAsm
/* arch/arm/include/asm/entry-macro-vic2.S
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*
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* Originally arch/arm/mach-s3c6400/include/mach/entry-macro.S
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*
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* Copyright 2008 Openmoko, Inc.
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* Copyright 2008 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* Low-level IRQ helper macros for a device with two VICs
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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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/* This should be included from <mach/entry-macro.S> with the necessary
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* defines for virtual addresses and IRQ bases for the two vics.
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*
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* The code needs the following defined:
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* IRQ_VIC0_BASE IRQ number of VIC0's first IRQ
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* IRQ_VIC1_BASE IRQ number of VIC1's first IRQ
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* VA_VIC0 Virtual address of VIC0
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* VA_VIC1 Virtual address of VIC1
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*
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* Note, code assumes VIC0's virtual address is an ARM immediate constant
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* away from VIC1.
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*/
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#include <asm/hardware/vic.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, =VA_VIC0
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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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@ check the vic0
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mov \irqnr, #IRQ_VIC0_BASE + 31
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ldr \irqstat, [ \base, # VIC_IRQ_STATUS ]
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teq \irqstat, #0
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@ otherwise try vic1
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addeq \tmp, \base, #(VA_VIC1 - VA_VIC0)
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addeq \irqnr, \irqnr, #(IRQ_VIC1_BASE - IRQ_VIC0_BASE)
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ldreq \irqstat, [ \tmp, # VIC_IRQ_STATUS ]
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teqeq \irqstat, #0
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clzne \irqstat, \irqstat
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subne \irqnr, \irqnr, \irqstat
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.endm
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