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