f80dff9da0
get_irqnr_preamble allows machines to take some action before entering the get_irqnr_and_base loop. On iop we enable cp6 access. arch_ret_to_user is added to the userspace return path to allow individual architectures to take actions, like disabling coprocessor access, before the final return to userspace. Per Nicolas Pitre's note, there is no need to cp_wait on the return to user as the latency to return is sufficient. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
40 lines
902 B
ArmAsm
40 lines
902 B
ArmAsm
/*
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* linux/include/asm-arm/arch-aaec2000/entry-macro.S
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*
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* Low-level IRQ helper for aaec-2000 based platforms
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*
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* Copyright (c) 2005 Nicolas Bellido Y Ortega
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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 version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <asm/arch/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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.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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mov r4, #0xf8000000
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add r4, r4, #0x00000500
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mov \base, r4
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ldr \irqstat, [\base, #0]
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cmp \irqstat, #0
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bne 1001f
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ldr \irqnr, =NR_IRQS+1
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b 1003f
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1001: mov \irqnr, #0
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1002: ands \tmp, \irqstat, #1
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mov \irqstat, \irqstat, LSR #1
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add \irqnr, \irqnr, #1
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beq 1002b
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sub \irqnr, \irqnr, #1
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1003:
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.endm
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