113 lines · c
1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (C) 2012 ARM Ltd.4 */5#ifndef __CLKSOURCE_ARM_ARCH_TIMER_H6#define __CLKSOURCE_ARM_ARCH_TIMER_H7 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 26enum arch_timer_reg {27 ARCH_TIMER_REG_CTRL,28 ARCH_TIMER_REG_CVAL,29};30 31enum arch_timer_ppi_nr {32 ARCH_TIMER_PHYS_SECURE_PPI,33 ARCH_TIMER_PHYS_NONSECURE_PPI,34 ARCH_TIMER_VIRT_PPI,35 ARCH_TIMER_HYP_PPI,36 ARCH_TIMER_HYP_VIRT_PPI,37 ARCH_TIMER_MAX_TIMER_PPI38};39 40enum arch_timer_spi_nr {41 ARCH_TIMER_PHYS_SPI,42 ARCH_TIMER_VIRT_SPI,43 ARCH_TIMER_MAX_TIMER_SPI44};45 46#define ARCH_TIMER_PHYS_ACCESS 047#define ARCH_TIMER_VIRT_ACCESS 148#define ARCH_TIMER_MEM_PHYS_ACCESS 249#define ARCH_TIMER_MEM_VIRT_ACCESS 350 51#define ARCH_TIMER_MEM_MAX_FRAMES 852 53#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */54#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */55#define ARCH_TIMER_VIRT_EVT_EN (1 << 2)56#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4)57#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)58#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */59#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */60#define ARCH_TIMER_EVT_INTERVAL_SCALE (1 << 17) /* EVNTIS in the ARMv8 ARM */61 62#define ARCH_TIMER_EVT_STREAM_PERIOD_US 10063#define ARCH_TIMER_EVT_STREAM_FREQ \64 (USEC_PER_SEC / ARCH_TIMER_EVT_STREAM_PERIOD_US)65 66struct arch_timer_kvm_info {67 struct timecounter timecounter;68 int virtual_irq;69 int physical_irq;70};71 72struct arch_timer_mem_frame {73 bool valid;74 phys_addr_t cntbase;75 size_t size;76 int phys_irq;77 int virt_irq;78};79 80struct arch_timer_mem {81 phys_addr_t cntctlbase;82 size_t size;83 struct arch_timer_mem_frame frame[ARCH_TIMER_MEM_MAX_FRAMES];84};85 86#ifdef CONFIG_ARM_ARCH_TIMER87 88extern u32 arch_timer_get_rate(void);89extern u64 (*arch_timer_read_counter)(void);90extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void);91extern bool arch_timer_evtstrm_available(void);92 93#else94 95static inline u32 arch_timer_get_rate(void)96{97 return 0;98}99 100static inline u64 arch_timer_read_counter(void)101{102 return 0;103}104 105static inline bool arch_timer_evtstrm_available(void)106{107 return false;108}109 110#endif111 112#endif113