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mbed-os/features/lwipstack/lwip-sys/arch/lwip_sys_arch.c

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/* Copyright (C) 2012 mbed.org, MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute,
* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <string.h>
/* mbed includes */
#include "mbed_error.h"
#include "mbed_interface.h"
#include "mbed_rtos_storage.h"
/* lwIP includes. */
#include "lwip/opt.h"
#include "lwip/debug.h"
#include "lwip/def.h"
#include "lwip/sys.h"
#include "lwip/mem.h"
/* Define the heap ourselves to give us section placement control */
#ifndef ETHMEM_SECTION
#if defined(TARGET_LPC4088) || defined(TARGET_LPC4088_DM)
# if defined (__ICCARM__)
# define ETHMEM_SECTION
# elif defined(TOOLCHAIN_GCC_CR)
# define ETHMEM_SECTION __attribute__((section(".data.$RamPeriph32")))
# else
# define ETHMEM_SECTION __attribute__((section("AHBSRAM1"),aligned))
# endif
#elif defined(TARGET_LPC1768)
# if defined (__ICCARM__)
# define ETHMEM_SECTION
# elif defined(TOOLCHAIN_GCC_CR)
# define ETHMEM_SECTION __attribute__((section(".data.$RamPeriph32")))
# else
# define ETHMEM_SECTION __attribute__((section("AHBSRAM0"),aligned))
# endif
#else
#define ETHMEM_SECTION
#endif
#endif
/* LWIP's mem.c doesn't give visibility of its overhead; memory area has to be big
* enough to hold "MEM_SIZE" (which we specify) plus mem.c's overhead. Have to work
* it all out here, copying code from mem.c */
struct mem {
/** index (-> ram[next]) of the next struct */
mem_size_t next;
/** index (-> ram[prev]) of the previous struct */
mem_size_t prev;
/** 1: this area is used; 0: this area is unused */
u8_t used;
};
#define SIZEOF_STRUCT_MEM LWIP_MEM_ALIGN_SIZE(sizeof(struct mem))
#define MEM_SIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEM_SIZE)
#if defined (__ICCARM__)
#pragma location = ".ethusbram"
#endif
LWIP_DECLARE_MEMORY_ALIGNED(lwip_ram_heap, MEM_SIZE_ALIGNED + (2U*SIZEOF_STRUCT_MEM)) ETHMEM_SECTION;
#if NO_SYS==1
#include "cmsis.h"
/* Saved total time in ms since timer was enabled */
static volatile u32_t systick_timems;
/* Enable systick rate and interrupt */
void SysTick_Init(void) {
if (SysTick_Config(SystemCoreClock / 1000)) {
while (1); /* Capture error */
}
}
/** \brief SysTick IRQ handler and timebase management
*
* This function keeps a timebase for the sysTick that can be
* used for other functions. It also calls an external function
* (SysTick_User) that must be defined outside this handler.
*/
void SysTick_Handler(void) {
systick_timems++;
}
/* Delay for the specified number of milliSeconds */
void osDelay(uint32_t ms) {
uint32_t to = ms + systick_timems;
while (to > systick_timems);
}
/* Returns the current time in mS. This is needed for the LWIP timers */
u32_t sys_now(void) {
return (u32_t) systick_timems;
}
#else
/* CMSIS-RTOS implementation of the lwip operating system abstraction */
#include "arch/sys_arch.h"
/*---------------------------------------------------------------------------*
* Routine: sys_mbox_new
*---------------------------------------------------------------------------*
* Description:
* Creates a new mailbox
* Inputs:
* sys_mbox_t mbox -- Handle of mailbox
* int queue_sz -- Size of elements in the mailbox
* Outputs:
* err_t -- ERR_OK if message posted, else ERR_MEM
*---------------------------------------------------------------------------*/
err_t sys_mbox_new(sys_mbox_t *mbox, int queue_sz) {
if (queue_sz > MB_SIZE)
error("sys_mbox_new size error\n");
memset(mbox, 0, sizeof(*mbox));
mbox->attr.cb_mem = &mbox->data;
mbox->attr.cb_size = sizeof(mbox->data);
mbox->id = osEventFlagsNew(&mbox->attr);
if (mbox->id == NULL)
error("sys_mbox_new create error\n");
osEventFlagsSet(mbox->id, SYS_MBOX_POST_EVENT);
return ERR_OK;
}
/*---------------------------------------------------------------------------*
* Routine: sys_mbox_free
*---------------------------------------------------------------------------*
* Description:
* Deallocates a mailbox. If there are messages still present in the
* mailbox when the mailbox is deallocated, it is an indication of a
* programming error in lwIP and the developer should be notified.
* Inputs:
* sys_mbox_t *mbox -- Handle of mailbox
*---------------------------------------------------------------------------*/
void sys_mbox_free(sys_mbox_t *mbox) {
if (mbox->post_idx != mbox->fetch_idx)
error("sys_mbox_free error\n");
}
/*---------------------------------------------------------------------------*
* Routine: sys_mbox_post
*---------------------------------------------------------------------------*
* Description:
* Post the "msg" to the mailbox.
* Inputs:
* sys_mbox_t mbox -- Handle of mailbox
* void *msg -- Pointer to data to post
*---------------------------------------------------------------------------*/
void sys_mbox_post(sys_mbox_t *mbox, void *msg) {
osEventFlagsWait(mbox->id, SYS_MBOX_POST_EVENT,
osFlagsWaitAny | osFlagsNoClear, osWaitForever);
int state = osKernelLock();
mbox->queue[mbox->post_idx % MB_SIZE] = msg;
mbox->post_idx += 1;
osEventFlagsSet(mbox->id, SYS_MBOX_FETCH_EVENT);
if (mbox->post_idx - mbox->fetch_idx == MB_SIZE-1)
osEventFlagsClear(mbox->id, SYS_MBOX_POST_EVENT);
osKernelRestoreLock(state);
}
/*---------------------------------------------------------------------------*
* Routine: sys_mbox_trypost
*---------------------------------------------------------------------------*
* Description:
* Try to post the "msg" to the mailbox. Returns immediately with
* error if cannot.
* Inputs:
* sys_mbox_t mbox -- Handle of mailbox
* void *msg -- Pointer to data to post
* Outputs:
* err_t -- ERR_OK if message posted, else ERR_MEM
* if not.
*---------------------------------------------------------------------------*/
err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg) {
uint32_t flags = osEventFlagsWait(mbox->id, SYS_MBOX_POST_EVENT,
osFlagsWaitAny | osFlagsNoClear, 0);
if ((flags & osFlagsError) || !(flags & SYS_MBOX_POST_EVENT))
return ERR_MEM;
int state = osKernelLock();
mbox->queue[mbox->post_idx % MB_SIZE] = msg;
mbox->post_idx += 1;
osEventFlagsSet(mbox->id, SYS_MBOX_FETCH_EVENT);
if (mbox->post_idx - mbox->fetch_idx == MB_SIZE-1)
osEventFlagsClear(mbox->id, SYS_MBOX_POST_EVENT);
osKernelRestoreLock(state);
return ERR_OK;
}
/*---------------------------------------------------------------------------*
* Routine: sys_arch_mbox_fetch
*---------------------------------------------------------------------------*
* Description:
* Blocks the thread until a message arrives in the mailbox, but does
* not block the thread longer than "timeout" milliseconds (similar to
* the sys_arch_sem_wait() function). The "msg" argument is a result
* parameter that is set by the function (i.e., by doing "*msg =
* ptr"). The "msg" parameter maybe NULL to indicate that the message
* should be dropped.
*
* The return values are the same as for the sys_arch_sem_wait() function:
* Number of milliseconds spent waiting or SYS_ARCH_TIMEOUT if there was a
* timeout.
*
* Note that a function with a similar name, sys_mbox_fetch(), is
* implemented by lwIP.
* Inputs:
* sys_mbox_t mbox -- Handle of mailbox
* void **msg -- Pointer to pointer to msg received
* u32_t timeout -- Number of milliseconds until timeout
* Outputs:
* u32_t -- SYS_ARCH_TIMEOUT if timeout, else number
* of milliseconds until received.
*---------------------------------------------------------------------------*/
u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout) {
uint32_t start = osKernelGetTickCount();
uint32_t flags = osEventFlagsWait(mbox->id, SYS_MBOX_FETCH_EVENT,
osFlagsWaitAny | osFlagsNoClear, (timeout ? timeout : osWaitForever));
if ((flags & osFlagsError) || !(flags & SYS_MBOX_FETCH_EVENT))
return SYS_ARCH_TIMEOUT;
int state = osKernelLock();
if (msg)
*msg = mbox->queue[mbox->fetch_idx % MB_SIZE];
mbox->fetch_idx += 1;
osEventFlagsSet(mbox->id, SYS_MBOX_POST_EVENT);
if (mbox->post_idx == mbox->fetch_idx)
osEventFlagsClear(mbox->id, SYS_MBOX_FETCH_EVENT);
osKernelRestoreLock(state);
return osKernelGetTickCount() - start;
}
/*---------------------------------------------------------------------------*
* Routine: sys_arch_mbox_tryfetch
*---------------------------------------------------------------------------*
* Description:
* Similar to sys_arch_mbox_fetch, but if message is not ready
* immediately, we'll return with SYS_MBOX_EMPTY. On success, 0 is
* returned.
* Inputs:
* sys_mbox_t mbox -- Handle of mailbox
* void **msg -- Pointer to pointer to msg received
* Outputs:
* u32_t -- SYS_MBOX_EMPTY if no messages. Otherwise,
* return ERR_OK.
*---------------------------------------------------------------------------*/
u32_t sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg) {
uint32_t flags = osEventFlagsWait(mbox->id, SYS_MBOX_FETCH_EVENT,
osFlagsWaitAny | osFlagsNoClear, 0);
if ((flags & osFlagsError) || !(flags & SYS_MBOX_FETCH_EVENT))
return SYS_MBOX_EMPTY;
int state = osKernelLock();
if (msg)
*msg = mbox->queue[mbox->fetch_idx % MB_SIZE];
mbox->fetch_idx += 1;
osEventFlagsSet(mbox->id, SYS_MBOX_POST_EVENT);
if (mbox->post_idx == mbox->fetch_idx)
osEventFlagsClear(mbox->id, SYS_MBOX_FETCH_EVENT);
osKernelRestoreLock(state);
return ERR_OK;
}
/*---------------------------------------------------------------------------*
* Routine: sys_sem_new
*---------------------------------------------------------------------------*
* Description:
* Creates and returns a new semaphore. The "ucCount" argument specifies
* the initial state of the semaphore.
* NOTE: Currently this routine only creates counts of 1 or 0
* Inputs:
* sys_sem_t sem -- Handle of semaphore
* u8_t count -- Initial count of semaphore
* Outputs:
* err_t -- ERR_OK if semaphore created
*---------------------------------------------------------------------------*/
err_t sys_sem_new(sys_sem_t *sem, u8_t count) {
memset(sem, 0, sizeof(*sem));
sem->attr.cb_mem = &sem->data;
sem->attr.cb_size = sizeof(sem->data);
sem->id = osSemaphoreNew(UINT16_MAX, count, &sem->attr);
if (sem->id == NULL)
error("sys_sem_new create error\n");
return ERR_OK;
}
/*---------------------------------------------------------------------------*
* Routine: sys_arch_sem_wait
*---------------------------------------------------------------------------*
* Description:
* Blocks the thread while waiting for the semaphore to be
* signaled. If the "timeout" argument is non-zero, the thread should
* only be blocked for the specified time (measured in
* milliseconds).
*
* If the timeout argument is non-zero, the return value is the number of
* milliseconds spent waiting for the semaphore to be signaled. If the
* semaphore wasn't signaled within the specified time, the return value is
* SYS_ARCH_TIMEOUT. If the thread didn't have to wait for the semaphore
* (i.e., it was already signaled), the function may return zero.
*
* Notice that lwIP implements a function with a similar name,
* sys_sem_wait(), that uses the sys_arch_sem_wait() function.
* Inputs:
* sys_sem_t sem -- Semaphore to wait on
* u32_t timeout -- Number of milliseconds until timeout
* Outputs:
* u32_t -- Time elapsed or SYS_ARCH_TIMEOUT.
*---------------------------------------------------------------------------*/
u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout) {
u32_t start = osKernelGetTickCount();
if (osSemaphoreAcquire(sem->id, (timeout != 0)?(timeout):(osWaitForever)) != osOK)
return SYS_ARCH_TIMEOUT;
return osKernelGetTickCount() - start;
}
/*---------------------------------------------------------------------------*
* Routine: sys_sem_signal
*---------------------------------------------------------------------------*
* Description:
* Signals (releases) a semaphore
* Inputs:
* sys_sem_t sem -- Semaphore to signal
*---------------------------------------------------------------------------*/
void sys_sem_signal(sys_sem_t *data) {
if (osSemaphoreRelease(data->id) != osOK)
mbed_die(); /* Can be called by ISR do not use printf */
}
/*---------------------------------------------------------------------------*
* Routine: sys_sem_free
*---------------------------------------------------------------------------*
* Description:
* Deallocates a semaphore
* Inputs:
* sys_sem_t sem -- Semaphore to free
*---------------------------------------------------------------------------*/
void sys_sem_free(sys_sem_t *sem) {}
/** Create a new mutex
* @param mutex pointer to the mutex to create
* @return a new mutex */
err_t sys_mutex_new(sys_mutex_t *mutex) {
memset(mutex, 0, sizeof(*mutex));
mutex->attr.name = "lwip_mutex";
mutex->attr.cb_mem = &mutex->data;
mutex->attr.cb_size = sizeof(mutex->data);
mutex->id = osMutexNew(&mutex->attr);
if (mutex->id == NULL)
return ERR_MEM;
return ERR_OK;
}
/** Lock a mutex
* @param mutex the mutex to lock */
void sys_mutex_lock(sys_mutex_t *mutex) {
if (osMutexAcquire(mutex->id, osWaitForever) != osOK)
error("sys_mutex_lock error\n");
}
/** Unlock a mutex
* @param mutex the mutex to unlock */
void sys_mutex_unlock(sys_mutex_t *mutex) {
if (osMutexRelease(mutex->id) != osOK)
error("sys_mutex_unlock error\n");
}
/** Delete a mutex
* @param mutex the mutex to delete */
void sys_mutex_free(sys_mutex_t *mutex) {}
/*---------------------------------------------------------------------------*
* Routine: sys_init
*---------------------------------------------------------------------------*
* Description:
* Initialize sys arch
*---------------------------------------------------------------------------*/
osMutexId_t lwip_sys_mutex;
osMutexAttr_t lwip_sys_mutex_attr;
mbed_rtos_storage_mutex_t lwip_sys_mutex_data;
void sys_init(void) {
lwip_sys_mutex_attr.name = "lwip_sys_mutex";
lwip_sys_mutex_attr.cb_mem = &lwip_sys_mutex_data;
lwip_sys_mutex_attr.cb_size = sizeof(lwip_sys_mutex_data);
lwip_sys_mutex = osMutexNew(&lwip_sys_mutex_attr);
if (lwip_sys_mutex == NULL)
error("sys_init error\n");
}
/*---------------------------------------------------------------------------*
* Routine: sys_jiffies
*---------------------------------------------------------------------------*
* Description:
* Used by PPP as a timestamp-ish value
*---------------------------------------------------------------------------*/
u32_t sys_jiffies(void) {
return osKernelGetTickCount();
}
/*---------------------------------------------------------------------------*
* Routine: sys_arch_protect
*---------------------------------------------------------------------------*
* Description:
* This optional function does a "fast" critical region protection and
* returns the previous protection level. This function is only called
* during very short critical regions. An embedded system which supports
* ISR-based drivers might want to implement this function by disabling
* interrupts. Task-based systems might want to implement this by using
* a mutex or disabling tasking. This function should support recursive
* calls from the same task or interrupt. In other words,
* sys_arch_protect() could be called while already protected. In
* that case the return value indicates that it is already protected.
*
* sys_arch_protect() is only required if your port is supporting an
* operating system.
* Outputs:
* sys_prot_t -- Previous protection level (not used here)
*---------------------------------------------------------------------------*/
sys_prot_t sys_arch_protect(void) {
if (osMutexAcquire(lwip_sys_mutex, osWaitForever) != osOK)
error("sys_arch_protect error\n");
return (sys_prot_t) 1;
}
/*---------------------------------------------------------------------------*
* Routine: sys_arch_unprotect
*---------------------------------------------------------------------------*
* Description:
* This optional function does a "fast" set of critical region
* protection to the value specified by pval. See the documentation for
* sys_arch_protect() for more information. This function is only
* required if your port is supporting an operating system.
* Inputs:
* sys_prot_t -- Previous protection level (not used here)
*---------------------------------------------------------------------------*/
void sys_arch_unprotect(sys_prot_t p) {
if (osMutexRelease(lwip_sys_mutex) != osOK)
error("sys_arch_unprotect error\n");
}
u32_t sys_now(void) {
return osKernelGetTickCount();
}
void sys_msleep(u32_t ms) {
osDelay(ms);
}
osThreadId_t lwip_tcpip_thread_id = 0;
void sys_tcpip_thread_set(void)
{
lwip_tcpip_thread_id = osThreadGetId();
}
bool sys_tcpip_thread_check(void)
{
return osThreadGetId() == lwip_tcpip_thread_id;
}
// Keep a pool of thread structures
static int thread_pool_index = 0;
static sys_thread_data_t thread_pool[SYS_THREAD_POOL_N];
/*---------------------------------------------------------------------------*
* Routine: sys_thread_new
*---------------------------------------------------------------------------*
* Description:
* Starts a new thread with priority "prio" that will begin its
* execution in the function "thread()". The "arg" argument will be
* passed as an argument to the thread() function. The id of the new
* thread is returned. Both the id and the priority are system
* dependent.
* Inputs:
* char *name -- Name of thread
* void (*thread)(void *arg) -- Pointer to function to run.
* void *arg -- Argument passed into function
* int stacksize -- Required stack amount in bytes
* int priority -- Thread priority
* Outputs:
* sys_thread_t -- Pointer to thread handle.
*---------------------------------------------------------------------------*/
#ifndef MBED_TZ_DEFAULT_ACCESS
#define MBED_TZ_DEFAULT_ACCESS 0
#endif
sys_thread_t sys_thread_new(const char *pcName,
void (*thread)(void *arg),
void *arg, int stacksize, int priority) {
LWIP_DEBUGF(SYS_DEBUG, ("New Thread: %s\n", pcName));
if (thread_pool_index >= SYS_THREAD_POOL_N)
error("sys_thread_new number error\n");
sys_thread_t t = (sys_thread_t)&thread_pool[thread_pool_index];
thread_pool_index++;
memset(t, 0, sizeof(*t));
t->attr.name = pcName ? pcName : "lwip_unnamed_thread";
t->attr.priority = (osPriority_t)priority;
t->attr.cb_size = sizeof(t->data);
t->attr.cb_mem = &t->data;
t->attr.stack_size = stacksize;
t->attr.stack_mem = malloc(stacksize);
t->attr.tz_module = MBED_TZ_DEFAULT_ACCESS;
if (t->attr.stack_mem == NULL) {
error("Error allocating the stack memory");
}
t->id = osThreadNew((osThreadFunc_t)thread, arg, &t->attr);
if (t->id == NULL)
error("sys_thread_new create error\n");
return t;
}
#endif
#ifdef LWIP_DEBUG
#include <stdbool.h>
#if MBED_CONF_LWIP_USE_MBED_TRACE
#include "mbed-trace/mbed_trace.h"
void lwip_mbed_tracef_debug(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
mbed_vtracef(TRACE_LEVEL_DEBUG, "lwIP", fmt, ap);
va_end(ap);
}
void lwip_mbed_tracef_warn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
mbed_vtracef(TRACE_LEVEL_WARN, "lwIP", fmt, ap);
va_end(ap);
}
void lwip_mbed_tracef_error(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
mbed_vtracef(TRACE_LEVEL_ERROR, "lwIP", fmt, ap);
va_end(ap);
}
void lwip_mbed_assert_fail(const char *msg, const char *func, const char *file, unsigned int line)
{
mbed_tracef(TRACE_LEVEL_ERROR, "lwIP", "Assertion failed: %s, function %s, file %s, line %u.", msg, func, file, line);
exit(EXIT_FAILURE); // XXX how about abort? mbed_assert uses exit, so follow suit
}
#else // MBED_CONF_LWIP_USE_MBED_TRACE
/** \brief Displays an error message on assertion
This function will display an error message on an assertion
to the debug output.
\param[in] msg Error message to display
\param[in] line Line number in file with error
\param[in] file Filename with error
*/
void assert_printf(char *msg, int line, char *file) {
if (msg)
error("%s:%d in file %s\n", msg, line, file);
else
error("LWIP ASSERT\n");
}
#endif // MBED_CONF_LWIP_USE_MBED_TRACE
#if TRACE_TO_ASCII_HEX_DUMP
void trace_to_ascii_hex_dump(char *prefix, int len, char *data)
{
int line_len = 0;
for (int i = 0; i < len; i++) {
if ((line_len % 16) == 0) {
if (line_len != 0) {
LWIP_PLATFORM_DIAG(("\n"));
}
LWIP_PLATFORM_DIAG(("%s %06x", prefix, line_len));
}
line_len++;
LWIP_PLATFORM_DIAG((" %02x", data[i]));
}
LWIP_PLATFORM_DIAG(("\n"));
}
#endif
#endif /* LWIP_DEBUG */
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