Linux kernel mirror (for testing)
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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#define CNTHCTL_EL1NVPCT (1 << 15)
28#define CNTHCTL_EL1NVVCT (1 << 16)
29#define CNTHCTL_CNTVMASK (1 << 18)
30#define CNTHCTL_CNTPMASK (1 << 19)
31
32enum arch_timer_reg {
33 ARCH_TIMER_REG_CTRL,
34 ARCH_TIMER_REG_CVAL,
35};
36
37enum arch_timer_ppi_nr {
38 ARCH_TIMER_PHYS_SECURE_PPI,
39 ARCH_TIMER_PHYS_NONSECURE_PPI,
40 ARCH_TIMER_VIRT_PPI,
41 ARCH_TIMER_HYP_PPI,
42 ARCH_TIMER_HYP_VIRT_PPI,
43 ARCH_TIMER_MAX_TIMER_PPI
44};
45
46enum arch_timer_spi_nr {
47 ARCH_TIMER_PHYS_SPI,
48 ARCH_TIMER_VIRT_SPI,
49 ARCH_TIMER_MAX_TIMER_SPI
50};
51
52#define ARCH_TIMER_PHYS_ACCESS 0
53#define ARCH_TIMER_VIRT_ACCESS 1
54#define ARCH_TIMER_MEM_PHYS_ACCESS 2
55#define ARCH_TIMER_MEM_VIRT_ACCESS 3
56
57#define ARCH_TIMER_MEM_MAX_FRAMES 8
58
59#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */
60#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */
61#define ARCH_TIMER_VIRT_EVT_EN (1 << 2)
62#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4)
63#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)
64#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */
65#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */
66#define ARCH_TIMER_EVT_INTERVAL_SCALE (1 << 17) /* EVNTIS in the ARMv8 ARM */
67
68#define ARCH_TIMER_EVT_STREAM_PERIOD_US 100
69#define ARCH_TIMER_EVT_STREAM_FREQ \
70 (USEC_PER_SEC / ARCH_TIMER_EVT_STREAM_PERIOD_US)
71
72struct arch_timer_kvm_info {
73 struct timecounter timecounter;
74 int virtual_irq;
75 int physical_irq;
76};
77
78struct arch_timer_mem_frame {
79 bool valid;
80 phys_addr_t cntbase;
81 size_t size;
82 int phys_irq;
83 int virt_irq;
84};
85
86struct arch_timer_mem {
87 phys_addr_t cntctlbase;
88 size_t size;
89 struct arch_timer_mem_frame frame[ARCH_TIMER_MEM_MAX_FRAMES];
90};
91
92#ifdef CONFIG_ARM_ARCH_TIMER
93
94extern u32 arch_timer_get_rate(void);
95extern u64 (*arch_timer_read_counter)(void);
96extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void);
97extern bool arch_timer_evtstrm_available(void);
98
99#else
100
101static inline u32 arch_timer_get_rate(void)
102{
103 return 0;
104}
105
106static inline u64 arch_timer_read_counter(void)
107{
108 return 0;
109}
110
111static inline bool arch_timer_evtstrm_available(void)
112{
113 return false;
114}
115
116#endif
117
118#endif