1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012 ARM Ltd. 4 */ 5 #ifndef __CLKSOURCE_ARM_ARCH_TIMER_H 6 #define __CLKSOURCE_ARM_ARCH_TIMER_H 7 8 #include <linux/bitops.h> 9 #include <linux/timecounter.h> 10 #include <linux/types.h> 11 12 #define ARCH_TIMER_TYPE_CP15 BIT(0) 13 #define ARCH_TIMER_TYPE_MEM BIT(1) 14 15 #define ARCH_TIMER_CTRL_ENABLE (1 << 0) 16 #define ARCH_TIMER_CTRL_IT_MASK (1 << 1) 17 #define ARCH_TIMER_CTRL_IT_STAT (1 << 2) 18 19 #define CNTHCTL_EL1PCTEN (1 << 0) 20 #define CNTHCTL_EL1PCEN (1 << 1) 21 #define CNTHCTL_EVNTEN (1 << 2) 22 #define CNTHCTL_EVNTDIR (1 << 3) 23 #define CNTHCTL_EVNTI (0xF << 4) 24 #define CNTHCTL_ECV (1 << 12) 25 #define CNTHCTL_EL1TVT (1 << 13) 26 #define CNTHCTL_EL1TVCT (1 << 14) 27 28 enum arch_timer_reg { 29 ARCH_TIMER_REG_CTRL, 30 ARCH_TIMER_REG_CVAL, 31 }; 32 33 enum arch_timer_ppi_nr { 34 ARCH_TIMER_PHYS_SECURE_PPI, 35 ARCH_TIMER_PHYS_NONSECURE_PPI, 36 ARCH_TIMER_VIRT_PPI, 37 ARCH_TIMER_HYP_PPI, 38 ARCH_TIMER_HYP_VIRT_PPI, 39 ARCH_TIMER_MAX_TIMER_PPI 40 }; 41 42 enum arch_timer_spi_nr { 43 ARCH_TIMER_PHYS_SPI, 44 ARCH_TIMER_VIRT_SPI, 45 ARCH_TIMER_MAX_TIMER_SPI 46 }; 47 48 #define ARCH_TIMER_PHYS_ACCESS 0 49 #define ARCH_TIMER_VIRT_ACCESS 1 50 #define ARCH_TIMER_MEM_PHYS_ACCESS 2 51 #define ARCH_TIMER_MEM_VIRT_ACCESS 3 52 53 #define ARCH_TIMER_MEM_MAX_FRAMES 8 54 55 #define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */ 56 #define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */ 57 #define ARCH_TIMER_VIRT_EVT_EN (1 << 2) 58 #define ARCH_TIMER_EVT_TRIGGER_SHIFT (4) 59 #define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT) 60 #define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */ 61 #define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */ 62 #define ARCH_TIMER_EVT_INTERVAL_SCALE (1 << 17) /* EVNTIS in the ARMv8 ARM */ 63 64 #define ARCH_TIMER_EVT_STREAM_PERIOD_US 100 65 #define ARCH_TIMER_EVT_STREAM_FREQ \ 66 (USEC_PER_SEC / ARCH_TIMER_EVT_STREAM_PERIOD_US) 67 68 struct arch_timer_kvm_info { 69 struct timecounter timecounter; 70 int virtual_irq; 71 int physical_irq; 72 }; 73 74 struct arch_timer_mem_frame { 75 bool valid; 76 phys_addr_t cntbase; 77 size_t size; 78 int phys_irq; 79 int virt_irq; 80 }; 81 82 struct arch_timer_mem { 83 phys_addr_t cntctlbase; 84 size_t size; 85 struct arch_timer_mem_frame frame[ARCH_TIMER_MEM_MAX_FRAMES]; 86 }; 87 88 #ifdef CONFIG_ARM_ARCH_TIMER 89 90 extern u32 arch_timer_get_rate(void); 91 extern u64 (*arch_timer_read_counter)(void); 92 extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void); 93 extern bool arch_timer_evtstrm_available(void); 94 95 #else 96 97 static inline u32 arch_timer_get_rate(void) 98 { 99 return 0; 100 } 101 102 static inline u64 arch_timer_read_counter(void) 103 { 104 return 0; 105 } 106 107 static inline bool arch_timer_evtstrm_available(void) 108 { 109 return false; 110 } 111 112 #endif 113 114 #endif 115