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Especially when internal memory fills up, some FreeRTOS structures (queues etc) get allocated in psram. These structures also contain a spinlock, which needs an atomic-compare-swap operation to work. The psram hardware, however, does not support this operation. As a workaround, this patch detects these spinlocks and will, instead of S32C1I, use equivalent C-code to simulate the behaviour, with an (internal) mux for atomicity.

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This commit is contained in:
Jeroen Domburg 2017-12-19 15:47:00 +08:00
parent 8ef7434d55
commit 70ab924dbb
8 changed files with 271 additions and 123 deletions
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2
components/freertos/include/freertos/portable.h
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@ -219,5 +219,7 @@ uint32_t xPortGetTickRateHz(void);
}
#endif
void uxPortCompareSetExtram(volatile uint32_t *addr, uint32_t compare, uint32_t *set);
#endif /* PORTABLE_H */

32
components/freertos/port.c
View File

@ -306,10 +306,6 @@ void vPortAssertIfInISR()
* For kernel use: Initialize a per-CPU mux. Mux will be initialized unlocked.
*/
void vPortCPUInitializeMutex(portMUX_TYPE *mux) {
#if defined(CONFIG_SPIRAM_SUPPORT)
// Check if mux belongs to internal memory (DRAM), prerequisite for atomic operations
configASSERT(esp_ptr_internal((const void *) mux));
#endif
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
ets_printf("Initializing mux %p\n", mux);
@ -386,6 +382,34 @@ void vPortSetStackWatchpoint( void* pxStackStart ) {
esp_set_watchpoint(1, (char*)addr, 32, ESP_WATCHPOINT_STORE);
}
#if defined(CONFIG_SPIRAM_SUPPORT)
/*
* Compare & set (S32C1) does not work in external RAM. Instead, this routine uses a mux (in internal memory) to fake it.
*/
static portMUX_TYPE extram_mux = portMUX_INITIALIZER_UNLOCKED;
void uxPortCompareSetExtram(volatile uint32_t *addr, uint32_t compare, uint32_t *set) {
uint32_t prev;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
vPortCPUAcquireMutexIntsDisabled(&extram_mux, portMUX_NO_TIMEOUT, __FUNCTION__, __LINE__);
#else
vPortCPUAcquireMutexIntsDisabled(&extram_mux, portMUX_NO_TIMEOUT);
#endif
prev=*addr;
if (prev==compare) {
*addr=*set;
}
*set=prev;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
vPortCPUReleaseMutexIntsDisabled(&extram_mux, __FUNCTION__, __LINE__);
#else
vPortCPUReleaseMutexIntsDisabled(&extram_mux);
#endif
}
#endif //defined(CONFIG_SPIRAM_SUPPORT)
uint32_t xPortGetTickRateHz(void) {
return (uint32_t)configTICK_RATE_HZ;
}

178
components/freertos/portmux_impl.h
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@ -32,138 +32,80 @@
deal by FreeRTOS internals.
It should be #included by freertos port.c or tasks.c, in esp-idf.
The way it works is that it essentially uses portmux_impl.inc.h as a
generator template of sorts. When no external memory is used, this
template is only used to generate the vPortCPUAcquireMutexIntsDisabledInternal
and vPortCPUReleaseMutexIntsDisabledInternal functions, which use S32C1 to
do an atomic compare & swap. When external memory is used the functions
vPortCPUAcquireMutexIntsDisabledExtram and vPortCPUReleaseMutexIntsDisabledExtram
are also generated, which use uxPortCompareSetExtram to fake the S32C1 instruction.
The wrapper functions vPortCPUAcquireMutexIntsDisabled and
vPortCPUReleaseMutexIntsDisabled will then use the appropriate function to do the
actual lock/unlock.
*/
#include "soc/cpu.h"
#include "portable.h"
/* XOR one core ID with this value to get the other core ID */
#define CORE_ID_XOR_SWAP (CORE_ID_PRO ^ CORE_ID_APP)
static inline bool __attribute__((always_inline))
//Define the mux routines for use with muxes in internal RAM
#define PORTMUX_AQUIRE_MUX_FN_NAME vPortCPUAcquireMutexIntsDisabledInternal
#define PORTMUX_RELEASE_MUX_FN_NAME vPortCPUReleaseMutexIntsDisabledInternal
#define PORTMUX_COMPARE_SET_FN_NAME uxPortCompareSet
#include "portmux_impl.inc.h"
#undef PORTMUX_AQUIRE_MUX_FN_NAME
#undef PORTMUX_RELEASE_MUX_FN_NAME
#undef PORTMUX_COMPARE_SET_FN_NAME
#if defined(CONFIG_SPIRAM_SUPPORT)
#define PORTMUX_AQUIRE_MUX_FN_NAME vPortCPUAcquireMutexIntsDisabledExtram
#define PORTMUX_RELEASE_MUX_FN_NAME vPortCPUReleaseMutexIntsDisabledExtram
#define PORTMUX_COMPARE_SET_FN_NAME uxPortCompareSetExtram
#include "portmux_impl.inc.h"
#undef PORTMUX_AQUIRE_MUX_FN_NAME
#undef PORTMUX_RELEASE_MUX_FN_NAME
#undef PORTMUX_COMPARE_SET_FN_NAME
#endif
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
vPortCPUAcquireMutexIntsDisabled(portMUX_TYPE *mux, int timeout_cycles, const char *fnName, int line) {
#define PORTMUX_AQUIRE_MUX_FN_ARGS portMUX_TYPE *mux, int timeout_cycles, const char *fnName, int line
#define PORTMUX_RELEASE_MUX_FN_ARGS portMUX_TYPE *mux, const char *fnName, int line
#define PORTMUX_AQUIRE_MUX_FN_CALL_ARGS(x) x, timeout_cycles, fnName, line
#define PORTMUX_RELEASE_MUX_FN_CALL_ARGS(x) x, fnName, line
#else
vPortCPUAcquireMutexIntsDisabled(portMUX_TYPE *mux, int timeout_cycles) {
#endif
#if !CONFIG_FREERTOS_UNICORE
uint32_t res;
portBASE_TYPE coreID, otherCoreID;
uint32_t ccount_start;
bool set_timeout = timeout_cycles > portMUX_NO_TIMEOUT;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
if (!set_timeout) {
timeout_cycles = 10000; // Always set a timeout in debug mode
set_timeout = true;
}
#endif
if (set_timeout) { // Timeout
RSR(CCOUNT, ccount_start);
}
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
uint32_t owner = mux->owner;
if (owner != portMUX_FREE_VAL && owner != CORE_ID_PRO && owner != CORE_ID_APP) {
ets_printf("ERROR: vPortCPUAcquireMutex: mux %p is uninitialized (0x%X)! Called from %s line %d.\n", mux, owner, fnName, line);
mux->owner=portMUX_FREE_VAL;
}
#define PORTMUX_AQUIRE_MUX_FN_ARGS portMUX_TYPE *mux, int timeout_cycles
#define PORTMUX_RELEASE_MUX_FN_ARGS portMUX_TYPE *mux
#define PORTMUX_AQUIRE_MUX_FN_CALL_ARGS(x) x, timeout_cycles
#define PORTMUX_RELEASE_MUX_FN_CALL_ARGS(x) x
#endif
/* Spin until we own the core */
RSR(PRID, coreID);
/* Note: coreID is the full 32 bit core ID (CORE_ID_PRO/CORE_ID_APP),
not the 0/1 value returned by xPortGetCoreID()
*/
otherCoreID = CORE_ID_XOR_SWAP ^ coreID;
do {
/* mux->owner should be one of portMUX_FREE_VAL, CORE_ID_PRO,
CORE_ID_APP:
- If portMUX_FREE_VAL, we want to atomically set to 'coreID'.
- If "our" coreID, we can drop through immediately.
- If "otherCoreID", we spin here.
*/
res = coreID;
uxPortCompareSet(&mux->owner, portMUX_FREE_VAL, &res);
if (res != otherCoreID) {
break; // mux->owner is "our" coreID
}
if (set_timeout) {
uint32_t ccount_now;
RSR(CCOUNT, ccount_now);
if (ccount_now - ccount_start > (unsigned)timeout_cycles) {
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
ets_printf("Timeout on mux! last non-recursive lock %s line %d, curr %s line %d\n", mux->lastLockedFn, mux->lastLockedLine, fnName, line);
ets_printf("Owner 0x%x count %d\n", mux->owner, mux->count);
#endif
return false;
}
}
} while (1);
assert(res == coreID || res == portMUX_FREE_VAL); /* any other value implies memory corruption or uninitialized mux */
assert((res == portMUX_FREE_VAL) == (mux->count == 0)); /* we're first to lock iff count is zero */
assert(mux->count < 0xFF); /* Bad count value implies memory corruption */
/* now we own it, we can increment the refcount */
mux->count++;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
if (res==portMUX_FREE_VAL) { //initial lock
mux->lastLockedFn=fnName;
mux->lastLockedLine=line;
} else {
ets_printf("Recursive lock: count=%d last non-recursive lock %s line %d, curr %s line %d\n", mux->count-1,
mux->lastLockedFn, mux->lastLockedLine, fnName, line);
static inline bool __attribute__((always_inline)) vPortCPUAcquireMutexIntsDisabled(PORTMUX_AQUIRE_MUX_FN_ARGS) {
#if defined(CONFIG_SPIRAM_SUPPORT)
if (esp_ptr_external_ram(mux)) {
return vPortCPUAcquireMutexIntsDisabledExtram(PORTMUX_AQUIRE_MUX_FN_CALL_ARGS(mux));
}
#endif /* CONFIG_FREERTOS_PORTMUX_DEBUG */
#endif /* CONFIG_FREERTOS_UNICORE */
return true;
#endif
return vPortCPUAcquireMutexIntsDisabledInternal(PORTMUX_AQUIRE_MUX_FN_CALL_ARGS(mux));
}
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
static inline void vPortCPUReleaseMutexIntsDisabled(portMUX_TYPE *mux, const char *fnName, int line) {
#else
static inline void vPortCPUReleaseMutexIntsDisabled(portMUX_TYPE *mux) {
#endif
#if !CONFIG_FREERTOS_UNICORE
portBASE_TYPE coreID;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
const char *lastLockedFn=mux->lastLockedFn;
int lastLockedLine=mux->lastLockedLine;
mux->lastLockedFn=fnName;
mux->lastLockedLine=line;
uint32_t owner = mux->owner;
if (owner != portMUX_FREE_VAL && owner != CORE_ID_PRO && owner != CORE_ID_APP) {
ets_printf("ERROR: vPortCPUReleaseMutex: mux %p is invalid (0x%x)!\n", mux, mux->owner);
static inline void vPortCPUReleaseMutexIntsDisabled(PORTMUX_RELEASE_MUX_FN_ARGS) {
#if defined(CONFIG_SPIRAM_SUPPORT)
if (esp_ptr_external_ram(mux)) {
vPortCPUReleaseMutexIntsDisabledExtram(PORTMUX_RELEASE_MUX_FN_CALL_ARGS(mux));
return;
}
#endif
#if CONFIG_FREERTOS_PORTMUX_DEBUG || !defined(NDEBUG)
RSR(PRID, coreID);
#endif
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
if (coreID != mux->owner) {
ets_printf("ERROR: vPortCPUReleaseMutex: mux %p was already unlocked!\n", mux);
ets_printf("Last non-recursive unlock %s line %d, curr unlock %s line %d\n", lastLockedFn, lastLockedLine, fnName, line);
}
#endif
assert(coreID == mux->owner); // This is a mutex we didn't lock, or it's corrupt
assert(mux->count > 0); // Indicates memory corruption
assert(mux->count < 0x100); // Indicates memory corruption
mux->count--;
if(mux->count == 0) {
mux->owner = portMUX_FREE_VAL;
}
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG_RECURSIVE
else {
ets_printf("Recursive unlock: count=%d last locked %s line %d, curr %s line %d\n", mux->count, lastLockedFn, lastLockedLine, fnName, line);
}
#endif
#endif //!CONFIG_FREERTOS_UNICORE
vPortCPUReleaseMutexIntsDisabledInternal(PORTMUX_RELEASE_MUX_FN_CALL_ARGS(mux));
}

171
components/freertos/portmux_impl.inc.h Normal file
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@ -0,0 +1,171 @@
/*
Copyright (C) 2016-2017 Espressif Shanghai PTE LTD
Copyright (C) 2015 Real Time Engineers Ltd.
All rights reserved
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
***************************************************************************
>>! NOTE: The modification to the GPL is included to allow you to !<<
>>! distribute a combined work that includes FreeRTOS without being !<<
>>! obliged to provide the source code for proprietary components !<<
>>! outside of the FreeRTOS kernel. !<<
***************************************************************************
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. Full license text is available on the following
link: http://www.freertos.org/a00114.html
*/
/*
Warning: funky preprocessor hackery ahead. Including these headers will generate two
functions, which names are defined by the preprocessor macros
PORTMUX_AQUIRE_MUX_FN_NAME and PORTMUX_RELEASE_MUX_FN_NAME. In order to do the compare
and exchange function, they will use whatever PORTMUX_COMPARE_SET_FN_NAME resolves to.
In some scenarios, this header is included *twice* in portmux_impl.h: one time
for the 'normal' mux code which uses a compare&exchange routine, another time
to generate code for a second set of these routines that use a second mux
(in internal ram) to fake a compare&exchange on a variable in external memory.
*/
static inline bool __attribute__((always_inline))
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
PORTMUX_AQUIRE_MUX_FN_NAME(portMUX_TYPE *mux, int timeout_cycles, const char *fnName, int line) {
#else
PORTMUX_AQUIRE_MUX_FN_NAME(portMUX_TYPE *mux, int timeout_cycles) {
#endif
#if !CONFIG_FREERTOS_UNICORE
uint32_t res;
portBASE_TYPE coreID, otherCoreID;
uint32_t ccount_start;
bool set_timeout = timeout_cycles > portMUX_NO_TIMEOUT;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
if (!set_timeout) {
timeout_cycles = 10000; // Always set a timeout in debug mode
set_timeout = true;
}
#endif
if (set_timeout) { // Timeout
RSR(CCOUNT, ccount_start);
}
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
uint32_t owner = mux->owner;
if (owner != portMUX_FREE_VAL && owner != CORE_ID_PRO && owner != CORE_ID_APP) {
ets_printf("ERROR: vPortCPUAcquireMutex: mux %p is uninitialized (0x%X)! Called from %s line %d.\n", mux, owner, fnName, line);
mux->owner=portMUX_FREE_VAL;
}
#endif
/* Spin until we own the core */
RSR(PRID, coreID);
/* Note: coreID is the full 32 bit core ID (CORE_ID_PRO/CORE_ID_APP),
not the 0/1 value returned by xPortGetCoreID()
*/
otherCoreID = CORE_ID_XOR_SWAP ^ coreID;
do {
/* mux->owner should be one of portMUX_FREE_VAL, CORE_ID_PRO,
CORE_ID_APP:
- If portMUX_FREE_VAL, we want to atomically set to 'coreID'.
- If "our" coreID, we can drop through immediately.
- If "otherCoreID", we spin here.
*/
res = coreID;
PORTMUX_COMPARE_SET_FN_NAME(&mux->owner, portMUX_FREE_VAL, &res);
if (res != otherCoreID) {
break; // mux->owner is "our" coreID
}
if (set_timeout) {
uint32_t ccount_now;
RSR(CCOUNT, ccount_now);
if (ccount_now - ccount_start > (unsigned)timeout_cycles) {
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
ets_printf("Timeout on mux! last non-recursive lock %s line %d, curr %s line %d\n", mux->lastLockedFn, mux->lastLockedLine, fnName, line);
ets_printf("Owner 0x%x count %d\n", mux->owner, mux->count);
#endif
return false;
}
}
} while (1);
assert(res == coreID || res == portMUX_FREE_VAL); /* any other value implies memory corruption or uninitialized mux */
assert((res == portMUX_FREE_VAL) == (mux->count == 0)); /* we're first to lock iff count is zero */
assert(mux->count < 0xFF); /* Bad count value implies memory corruption */
/* now we own it, we can increment the refcount */
mux->count++;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
if (res==portMUX_FREE_VAL) { //initial lock
mux->lastLockedFn=fnName;
mux->lastLockedLine=line;
} else {
ets_printf("Recursive lock: count=%d last non-recursive lock %s line %d, curr %s line %d\n", mux->count-1,
mux->lastLockedFn, mux->lastLockedLine, fnName, line);
}
#endif /* CONFIG_FREERTOS_PORTMUX_DEBUG */
#endif /* CONFIG_FREERTOS_UNICORE */
return true;
}
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
static inline void PORTMUX_RELEASE_MUX_FN_NAME(portMUX_TYPE *mux, const char *fnName, int line) {
#else
static inline void PORTMUX_RELEASE_MUX_FN_NAME(portMUX_TYPE *mux) {
#endif
#if !CONFIG_FREERTOS_UNICORE
portBASE_TYPE coreID;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
const char *lastLockedFn=mux->lastLockedFn;
int lastLockedLine=mux->lastLockedLine;
mux->lastLockedFn=fnName;
mux->lastLockedLine=line;
uint32_t owner = mux->owner;
if (owner != portMUX_FREE_VAL && owner != CORE_ID_PRO && owner != CORE_ID_APP) {
ets_printf("ERROR: vPortCPUReleaseMutex: mux %p is invalid (0x%x)!\n", mux, mux->owner);
}
#endif
#if CONFIG_FREERTOS_PORTMUX_DEBUG || !defined(NDEBUG)
RSR(PRID, coreID);
#endif
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
if (coreID != mux->owner) {
ets_printf("ERROR: vPortCPUReleaseMutex: mux %p was already unlocked!\n", mux);
ets_printf("Last non-recursive unlock %s line %d, curr unlock %s line %d\n", lastLockedFn, lastLockedLine, fnName, line);
}
#endif
assert(coreID == mux->owner); // This is a mutex we didn't lock, or it's corrupt
assert(mux->count > 0); // Indicates memory corruption
assert(mux->count < 0x100); // Indicates memory corruption
mux->count--;
if(mux->count == 0) {
mux->owner = portMUX_FREE_VAL;
}
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG_RECURSIVE
else {
ets_printf("Recursive unlock: count=%d last locked %s line %d, curr %s line %d\n", mux->count, lastLockedFn, lastLockedLine, fnName, line);
}
#endif
#endif //!CONFIG_FREERTOS_UNICORE
}

4
components/freertos/test/test_spinlocks.c
View File

@ -47,9 +47,13 @@ TEST_CASE("portMUX spinlocks (no contention)", "[freertos]")
#ifdef CONFIG_FREERTOS_UNICORE
TEST_PERFORMANCE_LESS_THAN(FREERTOS_SPINLOCK_CYCLES_PER_OP_UNICORE, "%d cycles/op", ((end - start)/REPEAT_OPS));
#else
#if CONFIG_SPIRAM_SUPPORT
TEST_PERFORMANCE_LESS_THAN(FREERTOS_SPINLOCK_CYCLES_PER_OP_PSRAM, "%d cycles/op", ((end - start)/REPEAT_OPS));
#else
TEST_PERFORMANCE_LESS_THAN(FREERTOS_SPINLOCK_CYCLES_PER_OP, "%d cycles/op", ((end - start)/REPEAT_OPS));
#endif
#endif
}
TEST_CASE("portMUX recursive locks (no contention)", "[freertos]")

1
components/idf_test/include/idf_performance.h
View File

@ -11,5 +11,6 @@
/* declare the performance here */
#define IDF_PERFORMANCE_MAX_HTTPS_REQUEST_BIN_SIZE 800
#define IDF_PERFORMANCE_MAX_FREERTOS_SPINLOCK_CYCLES_PER_OP 200
#define IDF_PERFORMANCE_MAX_FREERTOS_SPINLOCK_CYCLES_PER_OP_PSRAM 270
#define IDF_PERFORMANCE_MAX_FREERTOS_SPINLOCK_CYCLES_PER_OP_UNICORE 130
#define IDF_PERFORMANCE_MAX_ESP_TIMER_GET_TIME_PER_CALL 1000

1
components/soc/esp32/include/soc/soc.h
View File

@ -308,7 +308,6 @@
#define SOC_MEM_INTERNAL_LOW 0x3FF90000
#define SOC_MEM_INTERNAL_HIGH 0x400C2000
//Interrupt hardware source table
//This table is decided by hardware, don't touch this.
#define ETS_WIFI_MAC_INTR_SOURCE 0/**< interrupt of WiFi MAC, level*/

5
components/soc/include/soc/soc_memory_layout.h
View File

@ -89,3 +89,8 @@ inline static bool IRAM_ATTR esp_ptr_internal(const void *p) {
r |= ((intptr_t)p >= SOC_RTC_DATA_LOW && (intptr_t)p < SOC_RTC_DATA_HIGH);
return r;
}
inline static bool IRAM_ATTR esp_ptr_external_ram(const void *p) {
return ((intptr_t)p >= SOC_EXTRAM_DATA_LOW && (intptr_t)p < SOC_EXTRAM_DATA_HIGH);
}