| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-iop33x/include/mach/entry-macro.S |
| 3 | * |
| 4 | * Low-level IRQ helper macros for IOP33x-based platforms |
| 5 | * |
| 6 | * This file is licensed under the terms of the GNU General Public |
| 7 | * License version 2. This program is licensed "as is" without any |
| 8 | * warranty of any kind, whether express or implied. |
| 9 | */ |
| 10 | #include <mach/iop33x.h> |
| 11 | |
| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 12 | .macro get_irqnr_preamble, base, tmp |
| 13 | mrc p15, 0, \tmp, c15, c1, 0 |
| 14 | orr \tmp, \tmp, #(1 << 6) |
| 15 | mcr p15, 0, \tmp, c15, c1, 0 @ Enable cp6 access |
| 16 | mrc p15, 0, \tmp, c15, c1, 0 |
| 17 | mov \tmp, \tmp |
| 18 | sub pc, pc, #4 @ cp_wait |
| 19 | .endm |
| 20 | |
| 21 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 22 | mrc p6, 0, \irqstat, c14, c0, 0 @ Read IINTVEC |
| 23 | cmp \irqstat, #0 |
| 24 | mrceq p6, 0, \irqstat, c14, c0, 0 @ erratum 63 workaround |
| 25 | adds \irqnr, \irqstat, #1 |
| 26 | movne \irqnr, \irqstat, lsr #2 |
| 27 | .endm |
| 28 | |
| 29 | .macro arch_ret_to_user, tmp1, tmp2 |
| 30 | mrc p15, 0, \tmp1, c15, c1, 0 |
| 31 | ands \tmp2, \tmp1, #(1 << 6) |
| 32 | bicne \tmp1, \tmp1, #(1 << 6) |
| 33 | mcrne p15, 0, \tmp1, c15, c1, 0 @ Disable cp6 access |
| 34 | .endm |