arch: nios2: add timing implementation

Add timing implementation for NIOS2 architecture.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit is contained in:
Anas Nashif 2020-08-27 23:16:48 -04:00 committed by Maureen Helm
commit 150c82c8f9
3 changed files with 67 additions and 0 deletions

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@ -55,6 +55,7 @@ config NIOS2
select ATOMIC_OPERATIONS_C
select HAS_DTS
imply XIP
select ARCH_HAS_TIMING_FUNCTIONS
help
Nios II Gen 2 architecture

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@ -16,3 +16,4 @@ zephyr_library_sources(
)
zephyr_library_sources_ifdef(CONFIG_IRQ_OFFLOAD irq_offload.c)
zephyr_library_sources_ifdef(CONFIG_TIMING_FUNCTIONS timing.c)

65
arch/nios2/core/timing.c Normal file
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@ -0,0 +1,65 @@
/*
* Copyright (c) 2020 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <kernel.h>
#include <sys_clock.h>
#include <timing/timing.h>
#include "altera_avalon_timer_regs.h"
#define NIOS2_SUBTRACT_CLOCK_CYCLES(val) \
((IORD_ALTERA_AVALON_TIMER_PERIODH(TIMER_0_BASE) << 16 | \
(IORD_ALTERA_AVALON_TIMER_PERIODL(TIMER_0_BASE))) - \
((uint32_t)val))
#define TIMING_INFO_OS_GET_TIME() \
(NIOS2_SUBTRACT_CLOCK_CYCLES( \
((uint32_t)IORD_ALTERA_AVALON_TIMER_SNAPH(TIMER_0_BASE) \
<< 16) | \
((uint32_t)IORD_ALTERA_AVALON_TIMER_SNAPL(TIMER_0_BASE))))
void timing_init(void)
{
}
void timing_start(void)
{
}
void timing_stop(void)
{
}
timing_t timing_counter_get(void)
{
IOWR_ALTERA_AVALON_TIMER_SNAPL(TIMER_0_BASE, 10);
return TIMING_INFO_OS_GET_TIME();
}
uint64_t timing_cycles_get(volatile timing_t *const start,
volatile timing_t *const end)
{
return (*end - *start);
}
uint64_t timing_freq_get(void)
{
return sys_clock_hw_cycles_per_sec();
}
uint64_t timing_cycles_to_ns(uint64_t cycles)
{
return k_cyc_to_ns_floor64(cycles);
}
uint64_t timing_cycles_to_ns_avg(uint64_t cycles, uint32_t count)
{
return timing_cycles_to_ns(cycles) / count;
}
uint32_t timing_freq_get_mhz(void)
{
return (uint32_t)(timing_freq_get() / 1000000);
}