forked from luck/tmp_suning_uos_patched
156864f806
Save N instructions on every interrupt processing (where N is the number of interrupts processed in any one IRQ exception). Signed-off-by: Marc Pignat <marc.pignat@hevs.ch> Acked-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
33 lines
1.0 KiB
ArmAsm
33 lines
1.0 KiB
ArmAsm
/*
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* include/asm-arm/arch-at91/entry-macro.S
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*
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* Copyright (C) 2003-2005 SAN People
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*
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* Low-level IRQ helper macros for AT91RM9200 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 <asm/hardware.h>
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#include <asm/arch/at91_aic.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, =(AT91_VA_BASE_SYS + AT91_AIC) @ base virtual address of AIC peripheral
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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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ldr \irqnr, [\base, #(AT91_AIC_IVR - AT91_AIC)] @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt)
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ldr \irqstat, [\base, #(AT91_AIC_ISR - AT91_AIC)] @ read interrupt source number
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teq \irqstat, #0 @ ISR is 0 when no current interrupt, or spurious interrupt
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streq \tmp, [\base, #(AT91_AIC_EOICR - AT91_AIC)] @ not going to be handled further, then ACK it now.
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.endm
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