| /* |
| * Copyright (C) 2013 - ARM Ltd |
| * Author: Marc Zyngier <marc.zyngier@arm.com> |
| * |
| * Based on code by Carl van Schaik <carl@ok-labs.com>. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #ifndef _GENERICTIMER_H_ |
| #define _GENERICTIMER_H_ |
| |
| #ifdef __ASSEMBLY__ |
| |
| /* |
| * This macro provide a physical timer that can be used for delay in the code. |
| * The macro is moved from sunxi/psci_sun7i.S |
| * |
| * reg: is used in this macro. |
| * ticks: The freq is based on generic timer. |
| */ |
| .macro timer_wait reg, ticks |
| movw \reg, #(\ticks & 0xffff) |
| movt \reg, #(\ticks >> 16) |
| mcr p15, 0, \reg, c14, c2, 0 |
| isb |
| mov \reg, #3 |
| mcr p15, 0, \reg, c14, c2, 1 |
| 1 : isb |
| mrc p15, 0, \reg, c14, c2, 1 |
| ands \reg, \reg, #4 |
| bne 1b |
| mov \reg, #0 |
| mcr p15, 0, \reg, c14, c2, 1 |
| isb |
| .endm |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif /* _GENERICTIMER_H_ */ |
