43 lines
1.5 KiB
ArmAsm
43 lines
1.5 KiB
ArmAsm
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/*
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* iop13xx low level irq macros
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* Copyright (c) 2005-2006, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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*/
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.macro get_irqnr_preamble, base, tmp
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mrc p15, 0, \tmp, c15, c1, 0
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orr \tmp, \tmp, #(1 << 6)
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mcr p15, 0, \tmp, c15, c1, 0 @ Enable cp6 access
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.endm
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/*
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* Note: a 1-cycle window exists where iintvec will return the value
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* of iintbase, so we explicitly check for "bad zeros"
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*/
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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mrc p6, 0, \irqnr, c3, c2, 0 @ Read IINTVEC
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cmp \irqnr, #0
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mrceq p6, 0, \irqnr, c3, c2, 0 @ Re-read on potentially bad zero
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adds \irqstat, \irqnr, #1 @ Check for 0xffffffff
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movne \irqnr, \irqnr, lsr #2 @ Convert to irqnr
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.endm
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.macro arch_ret_to_user, tmp1, tmp2
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mrc p15, 0, \tmp1, c15, c1, 0
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ands \tmp2, \tmp1, #(1 << 6)
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bicne \tmp1, \tmp1, #(1 << 6)
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mcrne p15, 0, \tmp1, c15, c1, 0 @ Disable cp6 access
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.endm
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