kernel_liteos_a/platform/hw/hisoc/timer/timer.c

410 lines
11 KiB
C

/*
* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "los_timer_pri.h"
#include "los_tick_pri.h"
#include "los_sched_pri.h"
#include "los_sys_pri.h"
#include "los_hwi.h"
#include "los_swtmr.h"
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
STATIC_ASSERT(LOSCFG_KERNEL_SMP != YES, "hisoc timer does not suppot on SMP mode!");
STATIC_ASSERT(LOSCFG_BASE_CORE_TICK_HW_TIME == YES, "hisoc timer needs to turn on hw time!");
#define TIMER_ENABLE_BIT 7
#define TIMER_COUNTING_MODE_BIT 6
#define TIMER_INTERRUPT_ENABLE_BIT 5
#define TIMER_FREQUENCY_DIV_BIT 3
#define TIMER_SIZE_SELECT_BIT 1
#define TIMER_ONESHOT_BIT 0
#define READ_TIMER (*(volatile UINT32 *)(TIMER_TICK_REG_BASE + TIMER_VALUE))
#define US_PER_MS 1000
#define MS_PER_S 1000
STATIC UINT32 g_timeStamp __attribute__((section(".data.init")));
STATIC UINT32 g_lastDec __attribute__((section(".data.init")));
STATIC volatile UINT64 g_schedClockNanosec = 0;
STATIC volatile UINT64 g_schedClockCycle = 0;
STATIC volatile UINT32 g_timeClkLast = 0;
STATIC UINT16 g_swtmrID;
VOID HalClockTickTimerReload(UINT64 period)
{
UINT32 cycle = (UINT32)period;
WRITE_UINT32(cycle, TIMER_TICK_REG_BASE + TIMER_LOAD);
WRITE_UINT32(cycle, TIMER_TICK_REG_BASE + TIMER_BGLOAD);
HalClockIrqClear();
HalIrqClear(NUM_HAL_INTERRUPT_TIMER);
}
VOID ResetTimerMasked(VOID)
{
g_lastDec = READ_TIMER;
g_timeStamp = 0;
}
UINT32 GetTimerMasked(VOID)
{
UINT32 now = READ_TIMER;
if (g_lastDec >= now) {
/* not roll back */
g_timeStamp += g_lastDec - now;
} else {
/* rollback */
g_timeStamp += g_lastDec + (g_sysClock / LOSCFG_BASE_CORE_TICK_PER_SECOND) - now;
}
g_lastDec = now;
return g_timeStamp;
}
UINT32 TimeClockRead(VOID)
{
UINT32 value;
READ_UINT32(value, TIMER_TIME_REG_BASE + TIMER_VALUE);
value = TIMER_MAXLOAD - value;
return value;
}
UINT32 ArchTimerRollback(VOID)
{
UINT32 flag;
READ_UINT32(flag, TIMER_TICK_REG_BASE + TIMER_RIS);
return flag;
}
/* this func is start timer2 for start time */
VOID HalClockInitStart(VOID)
{
UINT32 temp;
/*
* enable timer2 here,
* but only time0 is used for system clock.
*/
READ_UINT32(temp, SYS_CTRL_REG_BASE + REG_SC_CTRL);
temp |= TIMER2_ENABLE;
WRITE_UINT32(temp, SYS_CTRL_REG_BASE + REG_SC_CTRL);
/* init the timestamp and lastdec value */
ResetTimerMasked();
/* disable timer2 */
WRITE_UINT32(0x0, TIMER2_REG_BASE + TIMER_CONTROL);
/* set init value as period */
WRITE_UINT32(TIMER_MAXLOAD, TIMER2_REG_BASE + TIMER_LOAD);
/*
* Timing mode: 32bits [bit 1 set as 1]
* ticking with 1/256 clock frequency [bit 3 set as 1, bit 2 set as 0]
* timing circulary [bit 6 set as 1]
* timer enabled [bit 7 set as 1]
*/
temp = (1U << TIMER_ENABLE_BIT) | (1U << TIMER_COUNTING_MODE_BIT) |
(1U << TIMER_FREQUENCY_DIV_BIT) | (1U << TIMER_SIZE_SELECT_BIT);
WRITE_UINT32(temp, TIMER2_REG_BASE + TIMER_CONTROL);
}
UINT32 GetTimer2Value(VOID)
{
UINT32 temp;
READ_UINT32(temp, TIMER2_REG_BASE + TIMER_VALUE);
return temp;
}
UINT32 HalClockGetTickTimerCycles(VOID)
{
UINT32 temp;
READ_UINT32(temp, TIMER_TICK_REG_BASE + TIMER_VALUE);
return temp;
}
/* get the system ms clock since the system start */
UINT32 HiGetMsClock(VOID)
{
const UINT32 t32 = TIMER_MAXLOAD - GetTimer2Value();
UINT64 t64 = (UINT64)t32 << 0x8; /* Timer2 is divided by 256, left shift 8 to recover sys clock */
UINT64 temp = OS_TIME_TIMER_CLOCK / MS_PER_S;
return (UINT32)(t64 / temp);
}
VOID HalClockInit(VOID)
{
UINT32 temp;
UINT32 period = g_sysClock / LOSCFG_BASE_CORE_TICK_PER_SECOND;
/*
* enable time0, timer1 here,
* but only time0 is used for system clock.
*/
READ_UINT32(temp, SYS_CTRL_REG_BASE + REG_SC_CTRL);
temp |= TIMER_TICK_ENABLE | TIMER_TIME_ENABLE;
WRITE_UINT32(temp, SYS_CTRL_REG_BASE + REG_SC_CTRL);
/* disable first */
WRITE_UINT32(0x0, TIMER_TICK_REG_BASE + TIMER_CONTROL);
/* set init value as period */
WRITE_UINT32(period, TIMER_TICK_REG_BASE + TIMER_LOAD);
/*
* Timing mode: 32bits [bit 1 set as 1]
* ticking with 1/1 clock frequency [bit 3 set as 0, bit 2 set as 0]
* interrupt enabled [bit 5 set as 1]
* timing circulary [bit 6 set as 1]
*/
temp = (1U << 6) | (1U << 5) | (1U << 1);
WRITE_UINT32(temp, TIMER_TICK_REG_BASE + TIMER_CONTROL);
/* init the timestamp and lastdec value */
ResetTimerMasked();
/* disable timer1 */
WRITE_UINT32(0x0, TIMER_TIME_REG_BASE + TIMER_CONTROL);
/* set init value as period */
WRITE_UINT32(0xffffffff, TIMER_TIME_REG_BASE + TIMER_LOAD);
/*
* Timing mode: 32bits [bit 1 set as 1]
* ticking with 1/1 clock frequency [bit 3 set as 0, bit 2 set as 0]
* timing circulary [bit 6 set as 1]
* timer enabled [bit 7 set as 1]
*/
temp = (1U << 7) | (1U << 6) | (1U << 1);
WRITE_UINT32(temp, TIMER_TIME_REG_BASE + TIMER_CONTROL);
(void)LOS_HwiCreate(NUM_HAL_INTERRUPT_TIMER, 0xa0, 0, OsTickHandler, 0);
}
VOID HalClockIrqClear(VOID)
{
WRITE_UINT32(1, TIMER_TICK_REG_BASE + TIMER_INT_CLR);
}
VOID HalClockEnable(VOID)
{
UINT32 val;
val = GET_UINT32(TIMER_TICK_REG_BASE + TIMER_CONTROL);
/* timer enabled [bit 7 set as 1] */
val |= 1U << TIMER_ENABLE_BIT;
WRITE_UINT32(val, TIMER_TICK_REG_BASE + TIMER_CONTROL);
}
/* Delay for some number of micro-seconds */
UINT32 GetTimer(UINT32 base)
{
return GetTimerMasked() - base;
}
VOID HalClockDelayUs(UINT32 usecs)
{
UINT32 tmo = 0;
UINT32 tmp;
UINT32 intSave = LOS_IntLock();
/* part of usecs >= 1ms */
if (usecs >= US_PER_MS) {
tmo = usecs / US_PER_MS; /* start to normalize for usec to cycles per sec */
tmo *= (g_sysClock / MS_PER_S); /* largest msecond 1374389 */
usecs -= (usecs / US_PER_MS * US_PER_MS); /* get value of usecs < 1ms */
}
/* part of usecs < 1ms */
if (usecs) {
tmo += (usecs * (g_sysClock / MS_PER_S)) / US_PER_MS; /* translate us into sys_clock, prevent u32 overflow */
}
/* reset "advancing" timestamp to 0, set lastdec value */
ResetTimerMasked();
tmp = GetTimer(0); /* get current timestamp */
/* set advancing stamp wake up time */
tmo += tmp;
while (GetTimerMasked() < tmo) {}
LOS_IntRestore(intSave);
}
VOID HalClockFreqWrite(UINT32 freq)
{
PRINT_WARN("hisoc timer does not support setting frequency\n");
}
STATIC UINT32 UpdateTimeClk(UINT32 *timeClk)
{
UINT32 timeClkNow;
timeClkNow = TimeClockRead();
if (timeClkNow >= g_timeClkLast) {
*timeClk = timeClkNow - g_timeClkLast;
} else {
*timeClk = timeClkNow + (TIMER_MAXLOAD - g_timeClkLast);
}
return timeClkNow;
}
VOID UpdateSchedClock(VOID)
{
UINT32 timeClk;
UINT32 intSave;
intSave = LOS_IntLock();
g_timeClkLast = UpdateTimeClk(&timeClk);
g_schedClockCycle += (UINT64)timeClk;
g_schedClockNanosec += (UINT64)CYCLE_TO_NS(timeClk);
OsAdjTime();
LOS_IntRestore(intSave);
}
STATIC UINT64 GetSchedClock(VOID)
{
UINT32 timeClk;
(VOID)UpdateTimeClk(&timeClk);
return (g_schedClockNanosec + (UINT64)CYCLE_TO_NS(timeClk));
}
STATIC UINT64 SchedClock(VOID)
{
UINT32 intSave;
UINT64 timeClk64;
intSave = LOS_IntLock();
timeClk64 = GetSchedClock();
LOS_IntRestore(intSave);
return timeClk64;
}
UINT64 hi_sched_clock(VOID)
{
return SchedClock();
}
VOID SchedClockSwtmr(VOID)
{
UINT32 ret;
ret = LOS_SwtmrCreate(SCHED_CLOCK_INTETRVAL_TICKS, LOS_SWTMR_MODE_PERIOD,
(SWTMR_PROC_FUNC)UpdateSchedClock, &g_swtmrID, 0);
if (ret != LOS_OK) {
PRINT_ERR("LOS_SwtmrCreate error %u\n", ret);
return;
}
ret = LOS_SwtmrStart(g_swtmrID);
if (ret != LOS_OK) {
PRINT_ERR("LOS_SwtmrStart error %u\n", ret);
return;
}
}
LITE_OS_SEC_TEXT_INIT VOID HalClockStart(VOID)
{
UINT32 ret = OsSchedSetTickTimerType(32); /* 32 bit tick timer */
if (ret != LOS_OK) {
return;
}
HalIrqUnmask(NUM_HAL_INTERRUPT_TIMER);
HalClockEnable();
/* start adjusting swtmer */
SchedClockSwtmr();
g_cycle2NsScale = ((double)OS_SYS_NS_PER_SECOND / ((long)OS_TIME_TIMER_CLOCK));
}
UINT64 HalClockGetCycles(VOID)
{
UINT32 timeClk;
UINT32 intSave;
UINT64 cycle;
intSave = LOS_IntLock();
(VOID)UpdateTimeClk(&timeClk);
cycle = g_schedClockCycle + (UINT64)timeClk;
LOS_IntRestore(intSave);
return cycle;
}
VOID HalDelayUs(UINT32 usecs)
{
UINT32 tmo = 0;
UINT32 tmp;
UINT32 intSave = LOS_IntLock();
/* part of usecs >= 1ms */
if (usecs >= US_PER_MS) {
tmo = usecs / US_PER_MS; /* start to normalize for usec to cycles per sec */
tmo *= (g_sysClock / MS_PER_S); /* largest msecond 1374389 */
usecs -= (usecs / US_PER_MS * US_PER_MS); /* get value of usecs < 1ms */
}
/* part of usecs < 1ms */
if (usecs) {
tmo += (usecs * (g_sysClock / MS_PER_S)) / US_PER_MS; /* translate us into sys_clock, prevent u32 overflow */
}
/* reset "advancing" timestamp to 0, set lastdec value */
ResetTimerMasked();
tmp = GetTimer(0); /* get current timestamp */
/* set advancing stamp wake up time */
tmo += tmp;
while (GetTimerMasked() < tmo) {}
LOS_IntRestore(intSave);
}
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */