1/* 2 * Copyright (C) 2012 ARM Ltd. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16#ifndef __CLKSOURCE_ARM_ARCH_TIMER_H 17#define __CLKSOURCE_ARM_ARCH_TIMER_H 18 19#include <linux/timecounter.h> 20#include <linux/types.h> 21 22#define ARCH_TIMER_CTRL_ENABLE (1 << 0) 23#define ARCH_TIMER_CTRL_IT_MASK (1 << 1) 24#define ARCH_TIMER_CTRL_IT_STAT (1 << 2) 25 26enum arch_timer_reg { 27 ARCH_TIMER_REG_CTRL, 28 ARCH_TIMER_REG_TVAL, 29}; 30 31#define ARCH_TIMER_PHYS_ACCESS 0 32#define ARCH_TIMER_VIRT_ACCESS 1 33#define ARCH_TIMER_MEM_PHYS_ACCESS 2 34#define ARCH_TIMER_MEM_VIRT_ACCESS 3 35 36#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */ 37#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */ 38#define ARCH_TIMER_VIRT_EVT_EN (1 << 2) 39#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4) 40#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT) 41#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */ 42#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */ 43 44#define ARCH_TIMER_EVT_STREAM_FREQ 10000 /* 100us */ 45 46#ifdef CONFIG_ARM_ARCH_TIMER 47 48extern u32 arch_timer_get_rate(void); 49extern u64 (*arch_timer_read_counter)(void); 50extern struct timecounter *arch_timer_get_timecounter(void); 51 52#else 53 54static inline u32 arch_timer_get_rate(void) 55{ 56 return 0; 57} 58 59static inline u64 arch_timer_read_counter(void) 60{ 61 return 0; 62} 63 64static inline struct timecounter *arch_timer_get_timecounter(void) 65{ 66 return NULL; 67} 68 69#endif 70 71#endif 72