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Add esp_intr_set_in_iram

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A function to change "in IRAM" status for an existing interrupt handle, without going through free/allocate of the interrupt.
mOS HW timer implementation requires this to make HW timers safe to re-set from an IRAM ISR.
This commit is contained in:
Deomid Ryabkov 2017-11-09 14:21:39 +03:00
parent 582b731c23
commit e3282a0cac
2 changed files with 34 additions and 2 deletions
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17
components/esp32/include/esp_intr_alloc.h
View File

@ -248,8 +248,8 @@ int esp_intr_get_intno(intr_handle_t handle);
esp_err_t esp_intr_disable(intr_handle_t handle);
/**
* @brief Ensable the interrupt associated with the handle
*
* @brief Enable the interrupt associated with the handle
*
* @note For local interrupts (ESP_INTERNAL_* sources), this function has to be called on the
* CPU the interrupt is allocated on. Other interrupts have no such restriction.
*
@ -260,6 +260,19 @@ esp_err_t esp_intr_disable(intr_handle_t handle);
*/
esp_err_t esp_intr_enable(intr_handle_t handle);
/**
* @brief Set the "in IRAM" status of the handler.
*
* @note Does not work on shared interrupts.
*
* @param handle The handle, as obtained by esp_intr_alloc or esp_intr_alloc_intrstatus
* @param is_in_iram Whether the handler associated with this handle resides in IRAM.
* Handlers residing in IRAM can be called when cache is disabled.
*
* @return ESP_ERR_INVALID_ARG if the combination of arguments is invalid.
* ESP_OK otherwise
*/
esp_err_t esp_intr_set_in_iram(intr_handle_t handle, bool is_in_iram);
/**
* @brief Disable interrupts that aren't specifically marked as running from IRAM

19
components/esp32/intr_alloc.c
View File

@ -685,6 +685,25 @@ esp_err_t esp_intr_alloc(int source, int flags, intr_handler_t handler, void *ar
return esp_intr_alloc_intrstatus(source, flags, 0, 0, handler, arg, ret_handle);
}
esp_err_t IRAM_ATTR esp_intr_set_in_iram(intr_handle_t handle, bool is_in_iram)
{
if (!handle) return ESP_ERR_INVALID_ARG;
vector_desc_t *vd = handle->vector_desc;
if (vd->flags & VECDESC_FL_SHARED) {
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL(&spinlock);
uint32_t mask = (1 << vd->intno);
if (is_in_iram) {
vd->flags |= VECDESC_FL_INIRAM;
non_iram_int_mask[vd->cpu] &= ~mask;
} else {
vd->flags &= ~VECDESC_FL_INIRAM;
non_iram_int_mask[vd->cpu] |= mask;
}
portEXIT_CRITICAL(&spinlock);
return ESP_OK;
}
esp_err_t esp_intr_free(intr_handle_t handle)
{