/*
|
* Copyright (C) 2012 ARM Ltd.
|
*
|
* This program is free software; you can redistribute it and/or modify
|
* it under the terms of the GNU General Public License version 2 as
|
* published by the Free Software Foundation.
|
*
|
* This program is distributed in the hope that it will be useful,
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
* GNU General Public License for more details.
|
*
|
* You should have received a copy of the GNU General Public License
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
*/
|
#ifndef __CLKSOURCE_ARM_ARCH_TIMER_H
|
#define __CLKSOURCE_ARM_ARCH_TIMER_H
|
|
#include <linux/bitops.h>
|
#include <linux/timecounter.h>
|
#include <linux/types.h>
|
|
#define ARCH_TIMER_TYPE_CP15 BIT(0)
|
#define ARCH_TIMER_TYPE_MEM BIT(1)
|
|
#define ARCH_TIMER_CTRL_ENABLE (1 << 0)
|
#define ARCH_TIMER_CTRL_IT_MASK (1 << 1)
|
#define ARCH_TIMER_CTRL_IT_STAT (1 << 2)
|
|
#define CNTHCTL_EL1PCTEN (1 << 0)
|
#define CNTHCTL_EL1PCEN (1 << 1)
|
#define CNTHCTL_EVNTEN (1 << 2)
|
#define CNTHCTL_EVNTDIR (1 << 3)
|
#define CNTHCTL_EVNTI (0xF << 4)
|
|
enum arch_timer_reg {
|
ARCH_TIMER_REG_CTRL,
|
ARCH_TIMER_REG_TVAL,
|
};
|
|
enum arch_timer_ppi_nr {
|
ARCH_TIMER_PHYS_SECURE_PPI,
|
ARCH_TIMER_PHYS_NONSECURE_PPI,
|
ARCH_TIMER_VIRT_PPI,
|
ARCH_TIMER_HYP_PPI,
|
ARCH_TIMER_MAX_TIMER_PPI
|
};
|
|
enum arch_timer_spi_nr {
|
ARCH_TIMER_PHYS_SPI,
|
ARCH_TIMER_VIRT_SPI,
|
ARCH_TIMER_MAX_TIMER_SPI
|
};
|
|
#define ARCH_TIMER_PHYS_ACCESS 0
|
#define ARCH_TIMER_VIRT_ACCESS 1
|
#define ARCH_TIMER_MEM_PHYS_ACCESS 2
|
#define ARCH_TIMER_MEM_VIRT_ACCESS 3
|
|
#define ARCH_TIMER_MEM_MAX_FRAMES 8
|
|
#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */
|
#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */
|
#define ARCH_TIMER_VIRT_EVT_EN (1 << 2)
|
#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4)
|
#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)
|
#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */
|
#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */
|
|
#define ARCH_TIMER_EVT_STREAM_PERIOD_US 100
|
#define ARCH_TIMER_EVT_STREAM_FREQ \
|
(USEC_PER_SEC / ARCH_TIMER_EVT_STREAM_PERIOD_US)
|
|
struct arch_timer_kvm_info {
|
struct timecounter timecounter;
|
int virtual_irq;
|
};
|
|
struct arch_timer_mem_frame {
|
bool valid;
|
phys_addr_t cntbase;
|
size_t size;
|
int phys_irq;
|
int virt_irq;
|
};
|
|
struct arch_timer_mem {
|
phys_addr_t cntctlbase;
|
size_t size;
|
struct arch_timer_mem_frame frame[ARCH_TIMER_MEM_MAX_FRAMES];
|
};
|
|
#ifdef CONFIG_ARM_ARCH_TIMER
|
|
extern u32 arch_timer_get_rate(void);
|
extern u64 (*arch_timer_read_counter)(void);
|
extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void);
|
extern bool arch_timer_evtstrm_available(void);
|
extern void arch_timer_mem_get_cval(u32 *lo, u32 *hi);
|
|
#else
|
|
static inline u32 arch_timer_get_rate(void)
|
{
|
return 0;
|
}
|
|
static inline u64 arch_timer_read_counter(void)
|
{
|
return 0;
|
}
|
|
static inline bool arch_timer_evtstrm_available(void)
|
{
|
return false;
|
}
|
|
static void arch_timer_mem_get_cval(u32 *lo, u32 *hi)
|
{
|
*lo = *hi = ~0U;
|
}
|
#endif
|
|
#endif
|
