diff options
Diffstat (limited to 'kernel/arch/arm/mach-iop13xx/include/mach/entry-macro.S')
| -rw-r--r-- | kernel/arch/arm/mach-iop13xx/include/mach/entry-macro.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-iop13xx/include/mach/entry-macro.S b/kernel/arch/arm/mach-iop13xx/include/mach/entry-macro.S new file mode 100644 index 000000000..1a2d60348 --- /dev/null +++ b/kernel/arch/arm/mach-iop13xx/include/mach/entry-macro.S @@ -0,0 +1,42 @@ +/* + * iop13xx low level irq macros + * Copyright (c) 2005-2006, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + * + */ + .macro get_irqnr_preamble, base, tmp + mrc p15, 0, \tmp, c15, c1, 0 + orr \tmp, \tmp, #(1 << 6) + mcr p15, 0, \tmp, c15, c1, 0 @ Enable cp6 access + .endm + + /* + * Note: a 1-cycle window exists where iintvec will return the value + * of iintbase, so we explicitly check for "bad zeros" + */ + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + mrc p6, 0, \irqnr, c3, c2, 0 @ Read IINTVEC + cmp \irqnr, #0 + mrceq p6, 0, \irqnr, c3, c2, 0 @ Re-read on potentially bad zero + adds \irqstat, \irqnr, #1 @ Check for 0xffffffff + movne \irqnr, \irqnr, lsr #2 @ Convert to irqnr + .endm + + .macro arch_ret_to_user, tmp1, tmp2 + mrc p15, 0, \tmp1, c15, c1, 0 + ands \tmp2, \tmp1, #(1 << 6) + bicne \tmp1, \tmp1, #(1 << 6) + mcrne p15, 0, \tmp1, c15, c1, 0 @ Disable cp6 access + .endm |