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#ifndef __ASMARM_SMP_TWD_H
#define __ASMARM_SMP_TWD_H
#define TWD_TIMER_LOAD 0x00
#define TWD_TIMER_COUNTER 0x04
#define TWD_TIMER_CONTROL 0x08
#define TWD_TIMER_INTSTAT 0x0C
#define TWD_WDOG_LOAD 0x20
#define TWD_WDOG_COUNTER 0x24
#define TWD_WDOG_CONTROL 0x28
#define TWD_WDOG_INTSTAT 0x2C
#define TWD_WDOG_RESETSTAT 0x30
#define TWD_WDOG_DISABLE 0x34
#define TWD_TIMER_CONTROL_ENABLE (1 << 0)
#define TWD_TIMER_CONTROL_ONESHOT (0 << 1)
#define TWD_TIMER_CONTROL_PERIODIC (1 << 1)
#define TWD_TIMER_CONTROL_IT_ENABLE (1 << 2)
#define TWD_TIMER_CONTROL_PRESCALE_MASK (0xFF << 8)
struct clock_event_device;
extern void __iomem *twd_base;
void twd_timer_stop(void);
int twd_timer_ack(void);
void twd_timer_setup(struct clock_event_device *);
/*
* Use this setup function on systems where the cpu clock frequency may
* change. periphclk_prescaler is the fixed divider value between the cpu
* clock and the PERIPHCLK clock that feeds the TWD. target_rate should be
* low enough that the prescaler can accurately reach the target rate from the
* lowest cpu frequency.
*/
void twd_timer_setup_scalable(struct clock_event_device *,
unsigned long target_rate, unsigned int periphclk_prescaler);
/*
* Recalculate the twd prescaler value when the cpu frequency changes. To
* prevent early timer interrupts, must be called before changing the cpu
* frequency if the frequency is increasing, or after if the frequency is
* decreasing.
*/
void twd_recalc_prescaler(unsigned long new_rate);
#endif
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