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intr_alloc: split interrupt allocator into common-code and platform-code

Browse Source 
esp_system: removed repeated interrupt allocator code and moved common code to esp_system

xtens: moved xtensa specific code from freertos to the xtensa component

hal/interrupt_controller: added interrupt controller hal and ll files

docs: update the doxyfile with new location of esp_itr_alloc.h file

xtensa: fixed dangerous relocation problem after moving xtensa interrupt files out of freertos

docs: removed Xtensa reference from intr_allocator api-reference

xtensa: pushed the interrupt function that manages non iram interrupts to the xtensa layer

esp_system/test: fixed platform dependent setting for intr_allocator tests

hal: rename the functions used to manage non iram interrupt mask.
This commit is contained in:
Felipe Neves
2020-09-30 07:44:12 +08:00
committed by Angus Gratton
parent 59b763bb9a
commit 2e826b7a8f
35 changed files with 1483 additions and 3443 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
components/esp32s3/CMakeLists.txt
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@@ -17,7 +17,7 @@ else()
"crosscore_int.c"
"dport_access.c"
"hw_random.c"
"intr_alloc.c"
"memprot.c"
"spiram.c"
"spiram_psram.c"

299
components/esp32s3/include/esp_intr_alloc.h
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@@ -1,299 +0,0 @@
// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef __ESP_INTR_ALLOC_H__
#define __ESP_INTR_ALLOC_H__
#include <stdint.h>
#include <stdbool.h>
#include "esp_err.h"
#include "freertos/xtensa_api.h"
#ifdef __cplusplus
extern "C" {
#endif
/** @addtogroup Intr_Alloc
* @{
*/
/** @brief Interrupt allocation flags
*
* These flags can be used to specify which interrupt qualities the
* code calling esp_intr_alloc* needs.
*
*/
//Keep the LEVELx values as they are here; they match up with (1<<level)
#define ESP_INTR_FLAG_LEVEL1 (1<<1) ///< Accept a Level 1 interrupt vector (lowest priority)
#define ESP_INTR_FLAG_LEVEL2 (1<<2) ///< Accept a Level 2 interrupt vector
#define ESP_INTR_FLAG_LEVEL3 (1<<3) ///< Accept a Level 3 interrupt vector
#define ESP_INTR_FLAG_LEVEL4 (1<<4) ///< Accept a Level 4 interrupt vector
#define ESP_INTR_FLAG_LEVEL5 (1<<5) ///< Accept a Level 5 interrupt vector
#define ESP_INTR_FLAG_LEVEL6 (1<<6) ///< Accept a Level 6 interrupt vector
#define ESP_INTR_FLAG_NMI (1<<7) ///< Accept a Level 7 interrupt vector (highest priority)
#define ESP_INTR_FLAG_SHARED (1<<8) ///< Interrupt can be shared between ISRs
#define ESP_INTR_FLAG_EDGE (1<<9) ///< Edge-triggered interrupt
#define ESP_INTR_FLAG_IRAM (1<<10) ///< ISR can be called if cache is disabled
#define ESP_INTR_FLAG_INTRDISABLED (1<<11) ///< Return with this interrupt disabled
#define ESP_INTR_FLAG_LOWMED (ESP_INTR_FLAG_LEVEL1|ESP_INTR_FLAG_LEVEL2|ESP_INTR_FLAG_LEVEL3) ///< Low and medium prio interrupts. These can be handled in C.
#define ESP_INTR_FLAG_HIGH (ESP_INTR_FLAG_LEVEL4|ESP_INTR_FLAG_LEVEL5|ESP_INTR_FLAG_LEVEL6|ESP_INTR_FLAG_NMI) ///< High level interrupts. Need to be handled in assembly.
#define ESP_INTR_FLAG_LEVELMASK (ESP_INTR_FLAG_LEVEL1|ESP_INTR_FLAG_LEVEL2|ESP_INTR_FLAG_LEVEL3| \
ESP_INTR_FLAG_LEVEL4|ESP_INTR_FLAG_LEVEL5|ESP_INTR_FLAG_LEVEL6| \
ESP_INTR_FLAG_NMI) ///< Mask for all level flags
/**@}*/
/** @addtogroup Intr_Alloc_Pseudo_Src
* @{
*/
/**
* The esp_intr_alloc* functions can allocate an int for all ETS_*_INTR_SOURCE interrupt sources that
* are routed through the interrupt mux. Apart from these sources, each core also has some internal
* sources that do not pass through the interrupt mux. To allocate an interrupt for these sources,
* pass these pseudo-sources to the functions.
*/
#define ETS_INTERNAL_TIMER0_INTR_SOURCE -1 ///< Xtensa timer 0 interrupt source
#define ETS_INTERNAL_TIMER1_INTR_SOURCE -2 ///< Xtensa timer 1 interrupt source
#define ETS_INTERNAL_TIMER2_INTR_SOURCE -3 ///< Xtensa timer 2 interrupt source
#define ETS_INTERNAL_SW0_INTR_SOURCE -4 ///< Software int source 1
#define ETS_INTERNAL_SW1_INTR_SOURCE -5 ///< Software int source 2
#define ETS_INTERNAL_PROFILING_INTR_SOURCE -6 ///< Int source for profiling
/**@}*/
// This is used to provide SystemView with positive IRQ IDs, otherwise sheduler events are not shown properly
#define ETS_INTERNAL_INTR_SOURCE_OFF (-ETS_INTERNAL_PROFILING_INTR_SOURCE)
#define ESP_INTR_ENABLE(inum) xt_ints_on((1<<inum))
#define ESP_INTR_DISABLE(inum) xt_ints_off((1<<inum))
typedef void (*intr_handler_t)(void *arg);
typedef struct intr_handle_data_t intr_handle_data_t;
typedef intr_handle_data_t *intr_handle_t ;
/**
* @brief Mark an interrupt as a shared interrupt
*
* This will mark a certain interrupt on the specified CPU as
* an interrupt that can be used to hook shared interrupt handlers
* to.
*
* @param intno The number of the interrupt (0-31)
* @param cpu CPU on which the interrupt should be marked as shared (0 or 1)
* @param is_in_iram Shared interrupt is for handlers that reside in IRAM and
* the int can be left enabled while the flash cache is disabled.
*
* @return ESP_ERR_INVALID_ARG if cpu or intno is invalid
* ESP_OK otherwise
*/
esp_err_t esp_intr_mark_shared(int intno, int cpu, bool is_in_iram);
/**
* @brief Reserve an interrupt to be used outside of this framework
*
* This will mark a certain interrupt on the specified CPU as
* reserved, not to be allocated for any reason.
*
* @param intno The number of the interrupt (0-31)
* @param cpu CPU on which the interrupt should be marked as shared (0 or 1)
*
* @return ESP_ERR_INVALID_ARG if cpu or intno is invalid
* ESP_OK otherwise
*/
esp_err_t esp_intr_reserve(int intno, int cpu);
/**
* @brief Allocate an interrupt with the given parameters.
*
* This finds an interrupt that matches the restrictions as given in the flags
* parameter, maps the given interrupt source to it and hooks up the given
* interrupt handler (with optional argument) as well. If needed, it can return
* a handle for the interrupt as well.
*
* The interrupt will always be allocated on the core that runs this function.
*
* If ESP_INTR_FLAG_IRAM flag is used, and handler address is not in IRAM or
* RTC_FAST_MEM, then ESP_ERR_INVALID_ARG is returned.
*
* @param source The interrupt source. One of the ETS_*_INTR_SOURCE interrupt mux
* sources, as defined in soc/soc.h, or one of the internal
* ETS_INTERNAL_*_INTR_SOURCE sources as defined in this header.
* @param flags An ORred mask of the ESP_INTR_FLAG_* defines. These restrict the
* choice of interrupts that this routine can choose from. If this value
* is 0, it will default to allocating a non-shared interrupt of level
* 1, 2 or 3. If this is ESP_INTR_FLAG_SHARED, it will allocate a shared
* interrupt of level 1. Setting ESP_INTR_FLAG_INTRDISABLED will return
* from this function with the interrupt disabled.
* @param handler The interrupt handler. Must be NULL when an interrupt of level >3
* is requested, because these types of interrupts aren't C-callable.
* @param arg Optional argument for passed to the interrupt handler
* @param ret_handle Pointer to an intr_handle_t to store a handle that can later be
* used to request details or free the interrupt. Can be NULL if no handle
* is required.
*
* @return ESP_ERR_INVALID_ARG if the combination of arguments is invalid.
* ESP_ERR_NOT_FOUND No free interrupt found with the specified flags
* ESP_OK otherwise
*/
esp_err_t esp_intr_alloc(int source, int flags, intr_handler_t handler, void *arg, intr_handle_t *ret_handle);
/**
* @brief Allocate an interrupt with the given parameters.
*
*
* This essentially does the same as esp_intr_alloc, but allows specifying a register and mask
* combo. For shared interrupts, the handler is only called if a read from the specified
* register, ANDed with the mask, returns non-zero. By passing an interrupt status register
* address and a fitting mask, this can be used to accelerate interrupt handling in the case
* a shared interrupt is triggered; by checking the interrupt statuses first, the code can
* decide which ISRs can be skipped
*
* @param source The interrupt source. One of the ETS_*_INTR_SOURCE interrupt mux
* sources, as defined in soc/soc.h, or one of the internal
* ETS_INTERNAL_*_INTR_SOURCE sources as defined in this header.
* @param flags An ORred mask of the ESP_INTR_FLAG_* defines. These restrict the
* choice of interrupts that this routine can choose from. If this value
* is 0, it will default to allocating a non-shared interrupt of level
* 1, 2 or 3. If this is ESP_INTR_FLAG_SHARED, it will allocate a shared
* interrupt of level 1. Setting ESP_INTR_FLAG_INTRDISABLED will return
* from this function with the interrupt disabled.
* @param intrstatusreg The address of an interrupt status register
* @param intrstatusmask A mask. If a read of address intrstatusreg has any of the bits
* that are 1 in the mask set, the ISR will be called. If not, it will be
* skipped.
* @param handler The interrupt handler. Must be NULL when an interrupt of level >3
* is requested, because these types of interrupts aren't C-callable.
* @param arg Optional argument for passed to the interrupt handler
* @param ret_handle Pointer to an intr_handle_t to store a handle that can later be
* used to request details or free the interrupt. Can be NULL if no handle
* is required.
*
* @return ESP_ERR_INVALID_ARG if the combination of arguments is invalid.
* ESP_ERR_NOT_FOUND No free interrupt found with the specified flags
* ESP_OK otherwise
*/
esp_err_t esp_intr_alloc_intrstatus(int source, int flags, uint32_t intrstatusreg, uint32_t intrstatusmask, intr_handler_t handler, void *arg, intr_handle_t *ret_handle);
/**
* @brief Disable and free an interrupt.
*
* Use an interrupt handle to disable the interrupt and release the resources
* associated with it.
*
* @note
* When the handler shares its source with other handlers, the interrupt status
* bits it's responsible for should be managed properly before freeing it. see
* ``esp_intr_disable`` for more details.
*
* @param handle The handle, as obtained by esp_intr_alloc or esp_intr_alloc_intrstatus
*
* @return ESP_ERR_INVALID_ARG if handle is invalid, or esp_intr_free runs on another core than
* where the interrupt is allocated on.
* ESP_OK otherwise
*/
esp_err_t esp_intr_free(intr_handle_t handle);
/**
* @brief Get CPU number an interrupt is tied to
*
* @param handle The handle, as obtained by esp_intr_alloc or esp_intr_alloc_intrstatus
*
* @return The core number where the interrupt is allocated
*/
int esp_intr_get_cpu(intr_handle_t handle);
/**
* @brief Get the allocated interrupt for a certain handle
*
* @param handle The handle, as obtained by esp_intr_alloc or esp_intr_alloc_intrstatus
*
* @return The interrupt number
*/
int esp_intr_get_intno(intr_handle_t handle);
/**
* @brief Disable the interrupt associated with the handle
*
* @note
* 1. 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.
* 2. When several handlers sharing a same interrupt source, interrupt status bits, which are
* handled in the handler to be disabled, should be masked before the disabling, or handled
* in other enabled interrupts properly. Miss of interrupt status handling will cause infinite
* interrupt calls and finally system crash.
*
* @param handle The handle, as obtained by esp_intr_alloc or esp_intr_alloc_intrstatus
*
* @return ESP_ERR_INVALID_ARG if the combination of arguments is invalid.
* ESP_OK otherwise
*/
esp_err_t esp_intr_disable(intr_handle_t 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.
*
* @param handle The handle, as obtained by esp_intr_alloc or esp_intr_alloc_intrstatus
*
* @return ESP_ERR_INVALID_ARG if the combination of arguments is invalid.
* ESP_OK otherwise
*/
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
*/
void esp_intr_noniram_disable(void);
/**
* @brief Re-enable interrupts disabled by esp_intr_noniram_disable
*/
void esp_intr_noniram_enable(void);
/**@}*/
#ifdef __cplusplus
}
#endif
#endif

954
components/esp32s3/intr_alloc.c
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@@ -1,954 +0,0 @@
// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_intr_alloc.h"
#include "esp_attr.h"
#include "soc/soc.h"
static const char *TAG = "intr_alloc";
#define ETS_INTERNAL_TIMER0_INTR_NO 6
#define ETS_INTERNAL_TIMER1_INTR_NO 15
#define ETS_INTERNAL_TIMER2_INTR_NO 16
#define ETS_INTERNAL_SW0_INTR_NO 7
#define ETS_INTERNAL_SW1_INTR_NO 29
#define ETS_INTERNAL_PROFILING_INTR_NO 11
/*
Define this to debug the choices made when allocating the interrupt. This leads to much debugging
output within a critical region, which can lead to weird effects like e.g. the interrupt watchdog
being triggered, that is why it is separate from the normal LOG* scheme.
*/
//define DEBUG_INT_ALLOC_DECISIONS
#ifdef DEBUG_INT_ALLOC_DECISIONS
# define ALCHLOG(...) ESP_EARLY_LOGD(TAG, __VA_ARGS__)
#else
# define ALCHLOG(...) do {} while (0)
#endif
typedef enum {
INTDESC_NORMAL = 0,
INTDESC_RESVD,
INTDESC_SPECIAL //for xtensa timers / software ints
} int_desc_flag_t;
typedef enum {
INTTP_LEVEL = 0,
INTTP_EDGE,
INTTP_NA
} int_type_t;
typedef struct {
int level;
int_type_t type;
int_desc_flag_t cpuflags[2];
} int_desc_t;
//We should mark the interrupt for the timer used by FreeRTOS as reserved. The specific timer
//is selectable using menuconfig; we use these cpp bits to convert that into something we can use in
//the table below.
#if CONFIG_FREERTOS_CORETIMER_0
#define INT6RES INTDESC_RESVD
#else
#define INT6RES INTDESC_SPECIAL
#endif
#if CONFIG_FREERTOS_CORETIMER_1
#define INT15RES INTDESC_RESVD
#else
#define INT15RES INTDESC_SPECIAL
#endif
//This is basically a software-readable version of the interrupt usage table in include/soc/soc.h
const static int_desc_t int_desc[32] = {
{ 1, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //0
{ 1, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //1
{ 1, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //2
{ 1, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //3
{ 1, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_NORMAL} }, //4
{ 1, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //5
{ 1, INTTP_NA, {INT6RES, INT6RES } }, //6
{ 1, INTTP_NA, {INTDESC_SPECIAL, INTDESC_SPECIAL}}, //7
{ 1, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //8
{ 1, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //9
{ 1, INTTP_EDGE, {INTDESC_NORMAL, INTDESC_NORMAL} }, //10
{ 3, INTTP_NA, {INTDESC_SPECIAL, INTDESC_SPECIAL}}, //11
{ 1, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //12
{ 1, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //13
{ 7, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //14, NMI
{ 3, INTTP_NA, {INT15RES, INT15RES } }, //15
{ 5, INTTP_NA, {INTDESC_SPECIAL, INTDESC_SPECIAL} }, //16
{ 1, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //17
{ 1, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //18
{ 2, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //19
{ 2, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //20
{ 2, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //21
{ 3, INTTP_EDGE, {INTDESC_RESVD, INTDESC_NORMAL} }, //22
{ 3, INTTP_LEVEL, {INTDESC_NORMAL, INTDESC_NORMAL} }, //23
{ 4, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_NORMAL} }, //24
{ 4, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //25
{ 5, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //26
{ 3, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //27
{ 4, INTTP_EDGE, {INTDESC_NORMAL, INTDESC_NORMAL} }, //28
{ 3, INTTP_NA, {INTDESC_SPECIAL, INTDESC_SPECIAL}}, //29
{ 4, INTTP_EDGE, {INTDESC_RESVD, INTDESC_RESVD } }, //30
{ 5, INTTP_LEVEL, {INTDESC_RESVD, INTDESC_RESVD } }, //31
};
typedef struct shared_vector_desc_t shared_vector_desc_t;
typedef struct vector_desc_t vector_desc_t;
struct shared_vector_desc_t {
int disabled: 1;
int source: 8;
volatile uint32_t *statusreg;
uint32_t statusmask;
intr_handler_t isr;
void *arg;
shared_vector_desc_t *next;
};
#define VECDESC_FL_RESERVED (1<<0)
#define VECDESC_FL_INIRAM (1<<1)
#define VECDESC_FL_SHARED (1<<2)
#define VECDESC_FL_NONSHARED (1<<3)
//Pack using bitfields for better memory use
struct vector_desc_t {
int flags: 16; //OR of VECDESC_FLAG_* defines
unsigned int cpu: 1;
unsigned int intno: 5;
int source: 8; //Interrupt mux flags, used when not shared
shared_vector_desc_t *shared_vec_info; //used when VECDESC_FL_SHARED
vector_desc_t *next;
};
struct intr_handle_data_t {
vector_desc_t *vector_desc;
shared_vector_desc_t *shared_vector_desc;
};
typedef struct non_shared_isr_arg_t non_shared_isr_arg_t;
struct non_shared_isr_arg_t {
intr_handler_t isr;
void *isr_arg;
int source;
};
//Linked list of vector descriptions, sorted by cpu.intno value
static vector_desc_t *vector_desc_head = NULL;
//This bitmask has an 1 if the int should be disabled when the flash is disabled.
static uint32_t non_iram_int_mask[portNUM_PROCESSORS];
//This bitmask has 1 in it if the int was disabled using esp_intr_noniram_disable.
static uint32_t non_iram_int_disabled[portNUM_PROCESSORS];
static bool non_iram_int_disabled_flag[portNUM_PROCESSORS];
#if CONFIG_SYSVIEW_ENABLE
extern uint32_t port_switch_flag[];
#endif
static portMUX_TYPE spinlock = portMUX_INITIALIZER_UNLOCKED;
//Inserts an item into vector_desc list so that the list is sorted
//with an incrementing cpu.intno value.
static void insert_vector_desc(vector_desc_t *to_insert)
{
vector_desc_t *vd = vector_desc_head;
vector_desc_t *prev = NULL;
while (vd != NULL) {
if (vd->cpu > to_insert->cpu) {
break;
}
if (vd->cpu == to_insert->cpu && vd->intno >= to_insert->intno) {
break;
}
prev = vd;
vd = vd->next;
}
if ((vector_desc_head == NULL) || (prev == NULL)) {
//First item
to_insert->next = vd;
vector_desc_head = to_insert;
} else {
prev->next = to_insert;
to_insert->next = vd;
}
}
//Returns a vector_desc entry for an intno/cpu, or NULL if none exists.
static vector_desc_t *find_desc_for_int(int intno, int cpu)
{
vector_desc_t *vd = vector_desc_head;
while (vd != NULL) {
if (vd->cpu == cpu && vd->intno == intno) {
break;
}
vd = vd->next;
}
return vd;
}
//Returns a vector_desc entry for an intno/cpu.
//Either returns a preexisting one or allocates a new one and inserts
//it into the list. Returns NULL on malloc fail.
static vector_desc_t *get_desc_for_int(int intno, int cpu)
{
vector_desc_t *vd = find_desc_for_int(intno, cpu);
if (vd == NULL) {
vector_desc_t *newvd = heap_caps_malloc(sizeof(vector_desc_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
if (newvd == NULL) {
return NULL;
}
memset(newvd, 0, sizeof(vector_desc_t));
newvd->intno = intno;
newvd->cpu = cpu;
insert_vector_desc(newvd);
return newvd;
} else {
return vd;
}
}
//Returns a vector_desc entry for an source, the cpu parameter is used to tell GPIO_INT and GPIO_NMI from different CPUs
static vector_desc_t *find_desc_for_source(int source, int cpu)
{
vector_desc_t *vd = vector_desc_head;
while (vd != NULL) {
if ( !(vd->flags & VECDESC_FL_SHARED) ) {
if ( vd->source == source && cpu == vd->cpu ) {
break;
}
} else if ( vd->cpu == cpu ) {
// check only shared vds for the correct cpu, otherwise skip
bool found = false;
shared_vector_desc_t *svd = vd->shared_vec_info;
assert(svd != NULL );
while (svd) {
if ( svd->source == source ) {
found = true;
break;
}
svd = svd->next;
}
if ( found ) {
break;
}
}
vd = vd->next;
}
return vd;
}
esp_err_t esp_intr_mark_shared(int intno, int cpu, bool is_int_ram)
{
if (intno > 31) {
return ESP_ERR_INVALID_ARG;
}
if (cpu >= portNUM_PROCESSORS) {
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL(&spinlock);
vector_desc_t *vd = get_desc_for_int(intno, cpu);
if (vd == NULL) {
portEXIT_CRITICAL(&spinlock);
return ESP_ERR_NO_MEM;
}
vd->flags = VECDESC_FL_SHARED;
if (is_int_ram) {
vd->flags |= VECDESC_FL_INIRAM;
}
portEXIT_CRITICAL(&spinlock);
return ESP_OK;
}
esp_err_t esp_intr_reserve(int intno, int cpu)
{
if (intno > 31) {
return ESP_ERR_INVALID_ARG;
}
if (cpu >= portNUM_PROCESSORS) {
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL(&spinlock);
vector_desc_t *vd = get_desc_for_int(intno, cpu);
if (vd == NULL) {
portEXIT_CRITICAL(&spinlock);
return ESP_ERR_NO_MEM;
}
vd->flags = VECDESC_FL_RESERVED;
portEXIT_CRITICAL(&spinlock);
return ESP_OK;
}
//Interrupt handler table and unhandled uinterrupt routine. Duplicated
//from xtensa_intr.c... it's supposed to be private, but we need to look
//into it in order to see if someone allocated an int using
//xt_set_interrupt_handler.
typedef struct xt_handler_table_entry {
void *handler;
void *arg;
} xt_handler_table_entry;
extern xt_handler_table_entry _xt_interrupt_table[XCHAL_NUM_INTERRUPTS * portNUM_PROCESSORS];
extern void xt_unhandled_interrupt(void *arg);
//Returns true if handler for interrupt is not the default unhandled interrupt handler
static bool int_has_handler(int intr, int cpu)
{
return (_xt_interrupt_table[intr * portNUM_PROCESSORS + cpu].handler != xt_unhandled_interrupt);
}
static bool is_vect_desc_usable(vector_desc_t *vd, int flags, int cpu, int force)
{
//Check if interrupt is not reserved by design
int x = vd->intno;
if (int_desc[x].cpuflags[cpu] == INTDESC_RESVD) {
ALCHLOG("....Unusable: reserved");
return false;
}
if (int_desc[x].cpuflags[cpu] == INTDESC_SPECIAL && force == -1) {
ALCHLOG("....Unusable: special-purpose int");
return false;
}
//Check if the interrupt level is acceptable
if (!(flags & (1 << int_desc[x].level))) {
ALCHLOG("....Unusable: incompatible level");
return false;
}
//check if edge/level type matches what we want
if (((flags & ESP_INTR_FLAG_EDGE) && (int_desc[x].type == INTTP_LEVEL)) ||
(((!(flags & ESP_INTR_FLAG_EDGE)) && (int_desc[x].type == INTTP_EDGE)))) {
ALCHLOG("....Unusable: incompatible trigger type");
return false;
}
//check if interrupt is reserved at runtime
if (vd->flags & VECDESC_FL_RESERVED) {
ALCHLOG("....Unusable: reserved at runtime.");
return false;
}
//Ints can't be both shared and non-shared.
assert(!((vd->flags & VECDESC_FL_SHARED) && (vd->flags & VECDESC_FL_NONSHARED)));
//check if interrupt already is in use by a non-shared interrupt
if (vd->flags & VECDESC_FL_NONSHARED) {
ALCHLOG("....Unusable: already in (non-shared) use.");
return false;
}
// check shared interrupt flags
if (vd->flags & VECDESC_FL_SHARED ) {
if (flags & ESP_INTR_FLAG_SHARED) {
bool in_iram_flag = ((flags & ESP_INTR_FLAG_IRAM) != 0);
bool desc_in_iram_flag = ((vd->flags & VECDESC_FL_INIRAM) != 0);
//Bail out if int is shared, but iram property doesn't match what we want.
if ((vd->flags & VECDESC_FL_SHARED) && (desc_in_iram_flag != in_iram_flag)) {
ALCHLOG("....Unusable: shared but iram prop doesn't match");
return false;
}
} else {
//We need an unshared IRQ; can't use shared ones; bail out if this is shared.
ALCHLOG("...Unusable: int is shared, we need non-shared.");
return false;
}
} else if (int_has_handler(x, cpu)) {
//Check if interrupt already is allocated by xt_set_interrupt_handler
ALCHLOG("....Unusable: already allocated");
return false;
}
return true;
}
//Locate a free interrupt compatible with the flags given.
//The 'force' argument can be -1, or 0-31 to force checking a certain interrupt.
//When a CPU is forced, the INTDESC_SPECIAL marked interrupts are also accepted.
static int get_available_int(int flags, int cpu, int force, int source)
{
int x;
int best = -1;
int bestLevel = 9;
int bestSharedCt = INT_MAX;
//Default vector desc, for vectors not in the linked list
vector_desc_t empty_vect_desc;
memset(&empty_vect_desc, 0, sizeof(vector_desc_t));
//Level defaults to any low/med interrupt
if (!(flags & ESP_INTR_FLAG_LEVELMASK)) {
flags |= ESP_INTR_FLAG_LOWMED;
}
ALCHLOG("get_available_int: try to find existing. Cpu: %d, Source: %d", cpu, source);
vector_desc_t *vd = find_desc_for_source(source, cpu);
if ( vd ) {
// if existing vd found, don't need to search any more.
ALCHLOG("get_avalible_int: existing vd found. intno: %d", vd->intno);
if ( force != -1 && force != vd->intno ) {
ALCHLOG("get_avalible_int: intr forced but not matach existing. existing intno: %d, force: %d", vd->intno, force);
} else if ( !is_vect_desc_usable(vd, flags, cpu, force) ) {
ALCHLOG("get_avalible_int: existing vd invalid.");
} else {
best = vd->intno;
}
return best;
}
if (force != -1) {
ALCHLOG("get_available_int: try to find force. Cpu: %d, Source: %d, Force: %d", cpu, source, force);
//if force assigned, don't need to search any more.
vd = find_desc_for_int(force, cpu);
if (vd == NULL ) {
//if existing vd not found, just check the default state for the intr.
empty_vect_desc.intno = force;
vd = &empty_vect_desc;
}
if ( is_vect_desc_usable(vd, flags, cpu, force) ) {
best = vd->intno;
} else {
ALCHLOG("get_avalible_int: forced vd invalid.");
}
return best;
}
ALCHLOG("get_free_int: start looking. Current cpu: %d", cpu);
//No allocated handlers as well as forced intr, iterate over the 32 possible interrupts
for (x = 0; x < 32; x++) {
//Grab the vector_desc for this vector.
vd = find_desc_for_int(x, cpu);
if (vd == NULL) {
empty_vect_desc.intno = x;
vd = &empty_vect_desc;
}
ALCHLOG("Int %d reserved %d level %d %s hasIsr %d",
x, int_desc[x].cpuflags[cpu] == INTDESC_RESVD, int_desc[x].level,
int_desc[x].type == INTTP_LEVEL ? "LEVEL" : "EDGE", int_has_handler(x, cpu));
if ( !is_vect_desc_usable(vd, flags, cpu, force) ) {
continue;
}
if (flags & ESP_INTR_FLAG_SHARED) {
//We're allocating a shared int.
//See if int already is used as a shared interrupt.
if (vd->flags & VECDESC_FL_SHARED) {
//We can use this already-marked-as-shared interrupt. Count the already attached isrs in order to see
//how useful it is.
int no = 0;
shared_vector_desc_t *svdesc = vd->shared_vec_info;
while (svdesc != NULL) {
no++;
svdesc = svdesc->next;
}
if (no < bestSharedCt || bestLevel > int_desc[x].level) {
//Seems like this shared vector is both okay and has the least amount of ISRs already attached to it.
best = x;
bestSharedCt = no;
bestLevel = int_desc[x].level;
ALCHLOG("...int %d more usable as a shared int: has %d existing vectors", x, no);
} else {
ALCHLOG("...worse than int %d", best);
}
} else {
if (best == -1) {
//We haven't found a feasible shared interrupt yet. This one is still free and usable, even if
//not marked as shared.
//Remember it in case we don't find any other shared interrupt that qualifies.
if (bestLevel > int_desc[x].level) {
best = x;
bestLevel = int_desc[x].level;
ALCHLOG("...int %d usable as a new shared int", x);
}
} else {
ALCHLOG("...already have a shared int");
}
}
} else {
//Seems this interrupt is feasible. Select it and break out of the loop; no need to search further.
if (bestLevel > int_desc[x].level) {
best = x;
bestLevel = int_desc[x].level;
} else {
ALCHLOG("...worse than int %d", best);
}
}
}
ALCHLOG("get_available_int: using int %d", best);
//Okay, by now we have looked at all potential interrupts and hopefully have selected the best one in best.
return best;
}
//Common shared isr handler. Chain-call all ISRs.
static void IRAM_ATTR shared_intr_isr(void *arg)
{
vector_desc_t *vd = (vector_desc_t *)arg;
shared_vector_desc_t *sh_vec = vd->shared_vec_info;
portENTER_CRITICAL(&spinlock);
while (sh_vec) {
if (!sh_vec->disabled) {
if ((sh_vec->statusreg == NULL) || (*sh_vec->statusreg & sh_vec->statusmask)) {
#if CONFIG_SYSVIEW_ENABLE
traceISR_ENTER(sh_vec->source + ETS_INTERNAL_INTR_SOURCE_OFF);
#endif
sh_vec->isr(sh_vec->arg);
#if CONFIG_SYSVIEW_ENABLE
// check if we will return to scheduler or to interrupted task after ISR
if (!port_switch_flag[xPortGetCoreID()]) {
traceISR_EXIT();
}
#endif
}
}
sh_vec = sh_vec->next;
}
portEXIT_CRITICAL(&spinlock);
}
#if CONFIG_SYSVIEW_ENABLE
//Common non-shared isr handler wrapper.
static void IRAM_ATTR non_shared_intr_isr(void *arg)
{
non_shared_isr_arg_t *ns_isr_arg = (non_shared_isr_arg_t *)arg;
portENTER_CRITICAL(&spinlock);
traceISR_ENTER(ns_isr_arg->source + ETS_INTERNAL_INTR_SOURCE_OFF);
// FIXME: can we call ISR and check port_switch_flag after releasing spinlock?
// when CONFIG_SYSVIEW_ENABLE = 0 ISRs for non-shared IRQs are called without spinlock
ns_isr_arg->isr(ns_isr_arg->isr_arg);
// check if we will return to scheduler or to interrupted task after ISR
if (!port_switch_flag[xPortGetCoreID()]) {
traceISR_EXIT();
}
portEXIT_CRITICAL(&spinlock);
}
#endif
//We use ESP_EARLY_LOG* here because this can be called before the scheduler is running.
esp_err_t esp_intr_alloc_intrstatus(int source, int flags, uint32_t intrstatusreg, uint32_t intrstatusmask, intr_handler_t handler,
void *arg, intr_handle_t *ret_handle)
{
intr_handle_data_t *ret = NULL;
int force = -1;
ESP_EARLY_LOGV(TAG, "esp_intr_alloc_intrstatus (cpu %d): checking args", xPortGetCoreID());
//Shared interrupts should be level-triggered.
if ((flags & ESP_INTR_FLAG_SHARED) && (flags & ESP_INTR_FLAG_EDGE)) {
return ESP_ERR_INVALID_ARG;
}
//You can't set an handler / arg for a non-C-callable interrupt.
if ((flags & ESP_INTR_FLAG_HIGH) && (handler)) {
return ESP_ERR_INVALID_ARG;
}
//Shared ints should have handler and non-processor-local source
if ((flags & ESP_INTR_FLAG_SHARED) && (!handler || source < 0)) {
return ESP_ERR_INVALID_ARG;
}
//Statusreg should have a mask
if (intrstatusreg && !intrstatusmask) {
return ESP_ERR_INVALID_ARG;
}
//If the ISR is marked to be IRAM-resident, the handler must not be in the cached region
if ((flags & ESP_INTR_FLAG_IRAM) &&
(ptrdiff_t) handler >= SOC_RTC_IRAM_HIGH &&
(ptrdiff_t) handler < SOC_RTC_DATA_LOW ) {
return ESP_ERR_INVALID_ARG;
}
//Default to prio 1 for shared interrupts. Default to prio 1, 2 or 3 for non-shared interrupts.
if ((flags & ESP_INTR_FLAG_LEVELMASK) == 0) {
if (flags & ESP_INTR_FLAG_SHARED) {
flags |= ESP_INTR_FLAG_LEVEL1;
} else {
flags |= ESP_INTR_FLAG_LOWMED;
}
}
ESP_EARLY_LOGV(TAG, "esp_intr_alloc_intrstatus (cpu %d): Args okay. Resulting flags 0x%X", xPortGetCoreID(), flags);
//Check 'special' interrupt sources. These are tied to one specific interrupt, so we
//have to force get_free_int to only look at that.
if (source == ETS_INTERNAL_TIMER0_INTR_SOURCE) {
force = ETS_INTERNAL_TIMER0_INTR_NO;
}
if (source == ETS_INTERNAL_TIMER1_INTR_SOURCE) {
force = ETS_INTERNAL_TIMER1_INTR_NO;
}
if (source == ETS_INTERNAL_TIMER2_INTR_SOURCE) {
force = ETS_INTERNAL_TIMER2_INTR_NO;
}
if (source == ETS_INTERNAL_SW0_INTR_SOURCE) {
force = ETS_INTERNAL_SW0_INTR_NO;
}
if (source == ETS_INTERNAL_SW1_INTR_SOURCE) {
force = ETS_INTERNAL_SW1_INTR_NO;
}
if (source == ETS_INTERNAL_PROFILING_INTR_SOURCE) {
force = ETS_INTERNAL_PROFILING_INTR_NO;
}
//Allocate a return handle. If we end up not needing it, we'll free it later on.
ret = heap_caps_malloc(sizeof(intr_handle_data_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
if (ret == NULL) {
return ESP_ERR_NO_MEM;
}
portENTER_CRITICAL(&spinlock);
int cpu = xPortGetCoreID();
//See if we can find an interrupt that matches the flags.
int intr = get_available_int(flags, cpu, force, source);
if (intr == -1) {
//None found. Bail out.
portEXIT_CRITICAL(&spinlock);
free(ret);
return ESP_ERR_NOT_FOUND;
}
//Get an int vector desc for int.
vector_desc_t *vd = get_desc_for_int(intr, cpu);
if (vd == NULL) {
portEXIT_CRITICAL(&spinlock);
free(ret);
return ESP_ERR_NO_MEM;
}
//Allocate that int!
if (flags & ESP_INTR_FLAG_SHARED) {
//Populate vector entry and add to linked list.
shared_vector_desc_t *sh_vec = malloc(sizeof(shared_vector_desc_t));
if (sh_vec == NULL) {
portEXIT_CRITICAL(&spinlock);
free(ret);
return ESP_ERR_NO_MEM;
}
memset(sh_vec, 0, sizeof(shared_vector_desc_t));
sh_vec->statusreg = (uint32_t *)intrstatusreg;
sh_vec->statusmask = intrstatusmask;
sh_vec->isr = handler;
sh_vec->arg = arg;
sh_vec->next = vd->shared_vec_info;
sh_vec->source = source;
sh_vec->disabled = 0;
vd->shared_vec_info = sh_vec;
vd->flags |= VECDESC_FL_SHARED;
//(Re-)set shared isr handler to new value.
xt_set_interrupt_handler(intr, shared_intr_isr, vd);
} else {
//Mark as unusable for other interrupt sources. This is ours now!
vd->flags = VECDESC_FL_NONSHARED;
if (handler) {
#if CONFIG_SYSVIEW_ENABLE
non_shared_isr_arg_t *ns_isr_arg = malloc(sizeof(non_shared_isr_arg_t));
if (!ns_isr_arg) {
portEXIT_CRITICAL(&spinlock);
free(ret);
return ESP_ERR_NO_MEM;
}
ns_isr_arg->isr = handler;
ns_isr_arg->isr_arg = arg;
ns_isr_arg->source = source;
xt_set_interrupt_handler(intr, non_shared_intr_isr, ns_isr_arg);
#else
xt_set_interrupt_handler(intr, handler, arg);
#endif
}
if (flags & ESP_INTR_FLAG_EDGE) {
xthal_set_intclear(1 << intr);
}
vd->source = source;
}
if (flags & ESP_INTR_FLAG_IRAM) {
vd->flags |= VECDESC_FL_INIRAM;
non_iram_int_mask[cpu] &= ~(1 << intr);
} else {
vd->flags &= ~VECDESC_FL_INIRAM;
non_iram_int_mask[cpu] |= (1 << intr);
}
if (source >= 0) {
intr_matrix_set(cpu, source, intr);
}
//Fill return handle data.
ret->vector_desc = vd;
ret->shared_vector_desc = vd->shared_vec_info;
//Enable int at CPU-level;
ESP_INTR_ENABLE(intr);
//If interrupt has to be started disabled, do that now; ints won't be enabled for real until the end
//of the critical section.
if (flags & ESP_INTR_FLAG_INTRDISABLED) {
esp_intr_disable(ret);
}
portEXIT_CRITICAL(&spinlock);
//Fill return handle if needed, otherwise free handle.
if (ret_handle != NULL) {
*ret_handle = ret;
} else {
free(ret);
}
ESP_EARLY_LOGD(TAG, "Connected src %d to int %d (cpu %d)", source, intr, cpu);
return ESP_OK;
}
esp_err_t esp_intr_alloc(int source, int flags, intr_handler_t handler, void *arg, intr_handle_t *ret_handle)
{
/*
As an optimization, we can create a table with the possible interrupt status registers and masks for every single
source there is. We can then add code here to look up an applicable value and pass that to the
esp_intr_alloc_intrstatus function.
*/
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)
{
bool free_shared_vector = false;
if (!handle) {
return ESP_ERR_INVALID_ARG;
}
//This routine should be called from the interrupt the task is scheduled on.
if (handle->vector_desc->cpu != xPortGetCoreID()) {
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL(&spinlock);
esp_intr_disable(handle);
if (handle->vector_desc->flags & VECDESC_FL_SHARED) {
//Find and kill the shared int
shared_vector_desc_t *svd = handle->vector_desc->shared_vec_info;
shared_vector_desc_t *prevsvd = NULL;
assert(svd); //should be something in there for a shared int
while (svd != NULL) {
if (svd == handle->shared_vector_desc) {
//Found it. Now kill it.
if (prevsvd) {
prevsvd->next = svd->next;
} else {
handle->vector_desc->shared_vec_info = svd->next;
}
free(svd);
break;
}
prevsvd = svd;
svd = svd->next;
}
//If nothing left, disable interrupt.
if (handle->vector_desc->shared_vec_info == NULL) {
free_shared_vector = true;
}
ESP_LOGV(TAG, "esp_intr_free: Deleting shared int: %s. Shared int is %s", svd ? "not found or last one" : "deleted", free_shared_vector ? "empty now." : "still in use");
}
if ((handle->vector_desc->flags & VECDESC_FL_NONSHARED) || free_shared_vector) {
ESP_LOGV(TAG, "esp_intr_free: Disabling int, killing handler");
#if CONFIG_SYSVIEW_ENABLE
if (!free_shared_vector) {
void *isr_arg = xt_get_interrupt_handler_arg(handle->vector_desc->intno);
if (isr_arg) {
free(isr_arg);
}
}
#endif
//Reset to normal handler
xt_set_interrupt_handler(handle->vector_desc->intno, xt_unhandled_interrupt, (void *)((int)handle->vector_desc->intno));
//Theoretically, we could free the vector_desc... not sure if that's worth the few bytes of memory
//we save.(We can also not use the same exit path for empty shared ints anymore if we delete
//the desc.) For now, just mark it as free.
handle->vector_desc->flags &= !(VECDESC_FL_NONSHARED | VECDESC_FL_RESERVED);
//Also kill non_iram mask bit.
non_iram_int_mask[handle->vector_desc->cpu] &= ~(1 << (handle->vector_desc->intno));
}
portEXIT_CRITICAL(&spinlock);
free(handle);
return ESP_OK;
}
int esp_intr_get_intno(intr_handle_t handle)
{
return handle->vector_desc->intno;
}
int esp_intr_get_cpu(intr_handle_t handle)
{
return handle->vector_desc->cpu;
}
/*
Interrupt disabling strategy:
If the source is >=0 (meaning a muxed interrupt), we disable it by muxing the interrupt to a non-connected
interrupt. If the source is <0 (meaning an internal, per-cpu interrupt), we disable it using ESP_INTR_DISABLE.
This allows us to, for the muxed CPUs, disable an int from the other core. It also allows disabling shared
interrupts.
*/
//Muxing an interrupt source to interrupt 6, 7, 11, 15, 16 or 29 cause the interrupt to effectively be disabled.
#define INT_MUX_DISABLED_INTNO 6
esp_err_t IRAM_ATTR esp_intr_enable(intr_handle_t handle)
{
if (!handle) {
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL_SAFE(&spinlock);
int source;
if (handle->shared_vector_desc) {
handle->shared_vector_desc->disabled = 0;
source = handle->shared_vector_desc->source;
} else {
source = handle->vector_desc->source;
}
if (source >= 0) {
//Disabled using int matrix; re-connect to enable
intr_matrix_set(handle->vector_desc->cpu, source, handle->vector_desc->intno);
} else {
//Re-enable using cpu int ena reg
if (handle->vector_desc->cpu != xPortGetCoreID()) {
return ESP_ERR_INVALID_ARG; //Can only enable these ints on this cpu
}
ESP_INTR_ENABLE(handle->vector_desc->intno);
}
portEXIT_CRITICAL_SAFE(&spinlock);
return ESP_OK;
}
esp_err_t IRAM_ATTR esp_intr_disable(intr_handle_t handle)
{
if (!handle) {
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL_SAFE(&spinlock);
int source;
bool disabled = 1;
if (handle->shared_vector_desc) {
handle->shared_vector_desc->disabled = 1;
source = handle->shared_vector_desc->source;
shared_vector_desc_t *svd = handle->vector_desc->shared_vec_info;
assert( svd != NULL );
while ( svd ) {
if ( svd->source == source && svd->disabled == 0 ) {
disabled = 0;
break;
}
svd = svd->next;
}
} else {
source = handle->vector_desc->source;
}
if (source >= 0) {
if ( disabled ) {
//Disable using int matrix
intr_matrix_set(handle->vector_desc->cpu, source, INT_MUX_DISABLED_INTNO);
}
} else {
//Disable using per-cpu regs
if (handle->vector_desc->cpu != xPortGetCoreID()) {
portEXIT_CRITICAL_SAFE(&spinlock);
return ESP_ERR_INVALID_ARG; //Can only enable these ints on this cpu
}
ESP_INTR_DISABLE(handle->vector_desc->intno);
}
portEXIT_CRITICAL_SAFE(&spinlock);
return ESP_OK;
}
void IRAM_ATTR esp_intr_noniram_disable(void)
{
int oldint;
int cpu = xPortGetCoreID();
int intmask = ~non_iram_int_mask[cpu];
if (non_iram_int_disabled_flag[cpu]) {
abort();
}
non_iram_int_disabled_flag[cpu] = true;
asm volatile (
"movi %0,0\n"
"xsr %0,INTENABLE\n" //disable all ints first
"rsync\n"
"and a3,%0,%1\n" //mask ints that need disabling
"wsr a3,INTENABLE\n" //write back
"rsync\n"
:"=&r"(oldint):"r"(intmask):"a3");
//Save which ints we did disable
non_iram_int_disabled[cpu] = oldint & non_iram_int_mask[cpu];
}
void IRAM_ATTR esp_intr_noniram_enable(void)
{
int cpu = xPortGetCoreID();
int intmask = non_iram_int_disabled[cpu];
if (!non_iram_int_disabled_flag[cpu]) {
abort();
}
non_iram_int_disabled_flag[cpu] = false;
asm volatile (
"movi a3,0\n"
"xsr a3,INTENABLE\n"
"rsync\n"
"or a3,a3,%0\n"
"wsr a3,INTENABLE\n"
"rsync\n"
::"r"(intmask):"a3");
}
//These functions are provided in ROM, but the ROM-based functions use non-multicore-capable
//virtualized interrupt levels. Thus, we disable them in the ld file and provide working
//equivalents here.
void IRAM_ATTR ets_isr_unmask(unsigned int mask)
{
xt_ints_on(mask);
}
void IRAM_ATTR ets_isr_mask(unsigned int mask)
{
xt_ints_off(mask);
}