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remove idelay use and move to k_busy_wait in SOF Zephyr code #9656

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remove idelay use and move to k_busy_wait in SOF Zephyr code #9656

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79e8329
idc: use wait_delay instead of idelay
kv2019i Nov 15, 2024
00bebe0
samples: audio: detect_test: use wait_delay instead of idelay
kv2019i Nov 15, 2024
d34b3c3
zephyr: lib/cpu: use k_busy_wait instead of idelay
kv2019i Nov 15, 2024
9a6ba39
zephyr: rtos: implement wait_delay variants with k_busy_wait
kv2019i Nov 15, 2024
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2 changes: 1 addition & 1 deletion src/idc/idc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -88,7 +88,7 @@ int idc_wait_in_blocking_mode(uint32_t target_core, bool (*cond)(int))

while (!cond(target_core)) {
/* spin here so other core can access IO and timers freely */
idelay(8192);
wait_delay(8192);

if (deadline < sof_cycle_get_64())
break;
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2 changes: 1 addition & 1 deletion src/samples/audio/detect_test.c
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Expand Up @@ -223,7 +223,7 @@ static void default_detect_test(struct comp_dev *dev,
/* assuming count is a processing frame size in samples */
cycles_per_frame = (cd->config.load_mips * 1000000 * count)
/ audio_stream_get_rate(source);
idelay(cycles_per_frame);
wait_delay(cycles_per_frame);
}

/* perform detection within current period */
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22 changes: 5 additions & 17 deletions zephyr/include/rtos/wait.h
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Expand Up @@ -11,34 +11,22 @@
#include <stdint.h>
#include <stdbool.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/time_units.h>
#include <rtos/timer.h>

/* TODO: use equivalent Zephyr */
static inline void idelay(int n)
static inline void wait_delay_us(uint64_t us)
{
while (n--)
__asm__ volatile("nop");
k_busy_wait(us);
}

/* DSP default delay in cycles - all platforms use this today */
#define PLATFORM_DEFAULT_DELAY 12

static inline void wait_delay(uint64_t number_of_clks)
{
uint64_t timeout = sof_cycle_get_64() + number_of_clks;

while (sof_cycle_get_64() < timeout)
idelay(PLATFORM_DEFAULT_DELAY);
k_busy_wait(k_cyc_to_us_floor64(number_of_clks));
}

static inline void wait_delay_ms(uint64_t ms)
{
wait_delay(k_ms_to_cyc_ceil64(ms));
}

static inline void wait_delay_us(uint64_t us)
{
wait_delay(k_us_to_cyc_ceil64(us));
k_busy_wait(ms * 1000);
}

int poll_for_register_delay(uint32_t reg, uint32_t mask,
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2 changes: 1 addition & 1 deletion zephyr/lib/cpu.c
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Expand Up @@ -235,7 +235,7 @@ void cpu_disable_core(int id)

/* Waiting for secondary core to enter idle state */
while (arch_cpu_active(id) && (k_cycle_get_64() < timeout))
idelay(PLATFORM_DEFAULT_DELAY);
k_busy_wait(1);

if (arch_cpu_active(id)) {
tr_err(&zephyr_tr, "core %d did not enter idle state", id);
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