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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
25enum arch_timer_reg {
26 ARCH_TIMER_REG_CTRL,
27 ARCH_TIMER_REG_TVAL,
28};
29
30enum 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
38enum 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
63struct arch_timer_kvm_info {
64 struct timecounter timecounter;
65 int virtual_irq;
66 int physical_irq;
67};
68
69struct 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
77struct 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
85extern u32 arch_timer_get_rate(void);
86extern u64 (*arch_timer_read_counter)(void);
87extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void);
88extern bool arch_timer_evtstrm_available(void);
89
90#else
91
92static inline u32 arch_timer_get_rate(void)
93{
94 return 0;
95}
96
97static inline u64 arch_timer_read_counter(void)
98{
99 return 0;
100}
101
102static inline bool arch_timer_evtstrm_available(void)
103{
104 return false;
105}
106
107#endif
108
109#endif
1/*
2 * Copyright (C) 2012 ARM Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16#ifndef __CLKSOURCE_ARM_ARCH_TIMER_H
17#define __CLKSOURCE_ARM_ARCH_TIMER_H
18
19#include <linux/clocksource.h>
20#include <linux/types.h>
21
22#define ARCH_TIMER_CTRL_ENABLE (1 << 0)
23#define ARCH_TIMER_CTRL_IT_MASK (1 << 1)
24#define ARCH_TIMER_CTRL_IT_STAT (1 << 2)
25
26enum arch_timer_reg {
27 ARCH_TIMER_REG_CTRL,
28 ARCH_TIMER_REG_TVAL,
29};
30
31#define ARCH_TIMER_PHYS_ACCESS 0
32#define ARCH_TIMER_VIRT_ACCESS 1
33#define ARCH_TIMER_MEM_PHYS_ACCESS 2
34#define ARCH_TIMER_MEM_VIRT_ACCESS 3
35
36#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */
37#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */
38#define ARCH_TIMER_VIRT_EVT_EN (1 << 2)
39#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4)
40#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)
41#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */
42#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */
43
44#define ARCH_TIMER_EVT_STREAM_FREQ 10000 /* 100us */
45
46#ifdef CONFIG_ARM_ARCH_TIMER
47
48extern u32 arch_timer_get_rate(void);
49extern u64 (*arch_timer_read_counter)(void);
50extern struct timecounter *arch_timer_get_timecounter(void);
51
52#else
53
54static inline u32 arch_timer_get_rate(void)
55{
56 return 0;
57}
58
59static inline u64 arch_timer_read_counter(void)
60{
61 return 0;
62}
63
64static inline struct timecounter *arch_timer_get_timecounter(void)
65{
66 return NULL;
67}
68
69#endif
70
71#endif