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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_CVAL,
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_HYP_VIRT_PPI,
36 ARCH_TIMER_MAX_TIMER_PPI
37};
38
39enum 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
65struct arch_timer_kvm_info {
66 struct timecounter timecounter;
67 int virtual_irq;
68 int physical_irq;
69};
70
71struct 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
79struct 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
87extern u32 arch_timer_get_rate(void);
88extern u64 (*arch_timer_read_counter)(void);
89extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void);
90extern bool arch_timer_evtstrm_available(void);
91
92#else
93
94static inline u32 arch_timer_get_rate(void)
95{
96 return 0;
97}
98
99static inline u64 arch_timer_read_counter(void)
100{
101 return 0;
102}
103
104static inline bool arch_timer_evtstrm_available(void)
105{
106 return false;
107}
108
109#endif
110
111#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