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 26 #define CNTHCTL_EL1PCTEN (1 << 0) 27 #define CNTHCTL_EL1PCEN (1 << 1) 28 #define CNTHCTL_EVNTEN (1 << 2) 29 #define CNTHCTL_EVNTDIR (1 << 3) 30 #define CNTHCTL_EVNTI (0xF << 4) 31 32 enum arch_timer_reg { 33 ARCH_TIMER_REG_CTRL, 34 ARCH_TIMER_REG_TVAL, 35 }; 36 37 #define ARCH_TIMER_PHYS_ACCESS 0 38 #define ARCH_TIMER_VIRT_ACCESS 1 39 #define ARCH_TIMER_MEM_PHYS_ACCESS 2 40 #define ARCH_TIMER_MEM_VIRT_ACCESS 3 41 42 #define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */ 43 #define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */ 44 #define ARCH_TIMER_VIRT_EVT_EN (1 << 2) 45 #define ARCH_TIMER_EVT_TRIGGER_SHIFT (4) 46 #define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT) 47 #define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */ 48 #define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */ 49 50 #define ARCH_TIMER_EVT_STREAM_FREQ 10000 /* 100us */ 51 52 struct arch_timer_kvm_info { 53 struct timecounter timecounter; 54 int virtual_irq; 55 }; 56 57 #ifdef CONFIG_ARM_ARCH_TIMER 58 59 extern u32 arch_timer_get_rate(void); 60 extern u64 (*arch_timer_read_counter)(void); 61 extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void); 62 63 #else 64 65 static inline u32 arch_timer_get_rate(void) 66 { 67 return 0; 68 } 69 70 static inline u64 arch_timer_read_counter(void) 71 { 72 return 0; 73 } 74 75 #endif 76 77 #endif 78