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- /*
- * 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_ */
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