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 25 enum arch_timer_reg { 26 ARCH_TIMER_REG_CTRL, 27 ARCH_TIMER_REG_CVAL, 28 }; 29 30 enum arch_timer_ppi_nr { 31 ARCH_TIMER_PHYS_SECURE_PPI, 32 ARCH_TIMER_PHYS_NONSECURE_PPI, 33 ARCH_TIMER_VIRT_PPI, 34 ARCH_TIMER_HYP_PPI, 35 ARCH_TIMER_HYP_VIRT_PPI, 36 ARCH_TIMER_MAX_TIMER_PPI 37 }; 38 39 enum arch_timer_spi_nr { 40 ARCH_TIMER_PHYS_SPI, 41 ARCH_TIMER_VIRT_SPI, 42 ARCH_TIMER_MAX_TIMER_SPI 43 }; 44 45 #define ARCH_TIMER_PHYS_ACCESS 0 46 #define ARCH_TIMER_VIRT_ACCESS 1 47 #define ARCH_TIMER_MEM_PHYS_ACCESS 2 48 #define ARCH_TIMER_MEM_VIRT_ACCESS 3 49 50 #define ARCH_TIMER_MEM_MAX_FRAMES 8 51 52 #define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */ 53 #define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */ 54 #define ARCH_TIMER_VIRT_EVT_EN (1 << 2) 55 #define ARCH_TIMER_EVT_TRIGGER_SHIFT (4) 56 #define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT) 57 #define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */ 58 #define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */ 59 #define ARCH_TIMER_EVT_INTERVAL_SCALE (1 << 17) /* EVNTIS in the ARMv8 ARM */ 60 61 #define ARCH_TIMER_EVT_STREAM_PERIOD_US 100 62 #define ARCH_TIMER_EVT_STREAM_FREQ \ 63 (USEC_PER_SEC / ARCH_TIMER_EVT_STREAM_PERIOD_US) 64 65 struct arch_timer_kvm_info { 66 struct timecounter timecounter; 67 int virtual_irq; 68 int physical_irq; 69 }; 70 71 struct arch_timer_mem_frame { 72 bool valid; 73 phys_addr_t cntbase; 74 size_t size; 75 int phys_irq; 76 int virt_irq; 77 }; 78 79 struct arch_timer_mem { 80 phys_addr_t cntctlbase; 81 size_t size; 82 struct arch_timer_mem_frame frame[ARCH_TIMER_MEM_MAX_FRAMES]; 83 }; 84 85 #ifdef CONFIG_ARM_ARCH_TIMER 86 87 extern u32 arch_timer_get_rate(void); 88 extern u64 (*arch_timer_read_counter)(void); 89 extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void); 90 extern bool arch_timer_evtstrm_available(void); 91 92 #else 93 94 static inline u32 arch_timer_get_rate(void) 95 { 96 return 0; 97 } 98 99 static inline u64 arch_timer_read_counter(void) 100 { 101 return 0; 102 } 103 104 static inline bool arch_timer_evtstrm_available(void) 105 { 106 return false; 107 } 108 109 #endif 110 111 #endif 112