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First task running in RISC-V-Qemu-sifive_e-FreedomStudio demo.

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This commit is contained in:
Richard Barry 2018-11-24 20:59:07 +00:00
parent d0ef322b13
commit dc99300fa9
11 changed files with 422 additions and 277 deletions
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6
FreeRTOS/Source/include/task.h
View file

@ -376,9 +376,9 @@ is used in assert() statements. */
* memory to be allocated dynamically.
*
* @return If neither pxStackBuffer or pxTaskBuffer are NULL, then the task will
* be created and pdPASS is returned. If either pxStackBuffer or pxTaskBuffer
* are NULL then the task will not be created and
* errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY is returned.
* be created and a handle to the created task is returned. If either
* pxStackBuffer or pxTaskBuffer are NULL then the task will not be created and
* NULL is returned.
*
* Example usage:
<pre>

18
FreeRTOS/Source/portable/GCC/RISC-V-RV32/port.c
View file

@ -51,7 +51,7 @@ static void prvTaskExitError( void );
/* Used to program the machine timer compare register. */
static uint64_t ullNextTime = 0ULL;
static const uint64_t ullTimerIncrementsForOneTick = ( uint64_t ) ( configCPU_CLOCK_HZ / configTICK_RATE_HZ );
static volatile uint64_t * const pullMachineTimerCompareRegister = ( volatile uint64_t * const ) ( configCTRL_BASE + 0x4000 );
static volatile uint64_t * const pullMachineTimerCompareRegister = ( volatile uint64_t * const ) ( configCLINT_BASE_ADDRESS + 0x4000 );
/*-----------------------------------------------------------*/
@ -175,8 +175,8 @@ const uint32_t ulMPIE_Bit = 0x80, ulMPP_Bits = 0x1800;
void vPortSetupTimerInterrupt( void )
{
uint32_t ulCurrentTimeHigh, ulCurrentTimeLow;
volatile uint32_t * const pulTimeHigh = ( volatile uint32_t * const ) ( configCTRL_BASE + 0xBFFC );
volatile uint32_t * const pulTimeLow = ( volatile uint32_t * const ) ( configCTRL_BASE + 0xBFF8 );
volatile uint32_t * const pulTimeHigh = ( volatile uint32_t * const ) ( configCLINT_BASE_ADDRESS + 0xBFFC );
volatile uint32_t * const pulTimeLow = ( volatile uint32_t * const ) ( configCLINT_BASE_ADDRESS + 0xBFF8 );
do
{
@ -200,12 +200,12 @@ volatile uint32_t * const pulTimeLow = ( volatile uint32_t * const ) ( configCTR
void Software_IRQHandler( void )
{
volatile uint32_t * const ulSoftInterrupt = ( uint32_t * ) configCTRL_BASE;
volatile uint32_t * const ulSoftInterrupt = ( uint32_t * ) configCLINT_BASE_ADDRESS;
vTaskSwitchContext();
/* Clear software interrupt. */
*( ( uint32_t * ) configCTRL_BASE ) &= 0x08UL;
*( ( uint32_t * ) configCLINT_BASE_ADDRESS ) &= 0x08UL;
}
/*-----------------------------------------------------------*/
@ -246,6 +246,14 @@ extern void xPortStartFirstTask( void );
should be executing. */
return pdFAIL;
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* Not implemented. */
for( ;; );
}

7
FreeRTOS/Source/portable/GCC/RISC-V-RV32/portASM.S
View file

@ -41,13 +41,16 @@
.global xPortStartFirstTask
.global vPortTrapHandler
.extern pxCurrentTCB
.extern handle_trap
.extern ulPortTrapHandler
/*-----------------------------------------------------------*/
.align 8
xPortStartFirstTask:
la t0, vPortTrapHandler
csrw mtvec, t0
lw sp, pxCurrentTCB /* Load pxCurrentTCB. */
lw sp, 0( sp ) /* Read sp from first TCB member. */
@ -127,7 +130,7 @@ vPortTrapHandler:
csrr a1, mepc
mv a2, sp
/*_RB_ Does stack need aligning here? */
jal handle_trap
jal ulPortTrapHandler
csrw mepc, a0
/* Save exception return address. */
sw a0, 0( sp )

2
FreeRTOS/Source/portable/GCC/RISC-V-RV32/portmacro.h
View file

@ -70,7 +70,7 @@ not need to be guarded with a critical section. */
/* Scheduler utilities. */
#define portYIELD() __asm volatile( "ecall" ); // software interrupt alternative *( ( uint32_t * ) configCTRL_BASE ) |= 0x08UL
#define portYIELD() __asm volatile( "ecall" ); // software interrupt alternative *( ( uint32_t * ) configCLINT_BASE_ADDRESS ) |= 0x08UL
#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired ) vPortYield()
#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
/*-----------------------------------------------------------*/

42
FreeRTOS/Source/tasks.c
View file

@ -2937,28 +2937,28 @@ void vTaskSwitchContext( void )
#if ( configGENERATE_RUN_TIME_STATS == 1 )
{
#ifdef portALT_GET_RUN_TIME_COUNTER_VALUE
portALT_GET_RUN_TIME_COUNTER_VALUE( ulTotalRunTime );
#else
ulTotalRunTime = portGET_RUN_TIME_COUNTER_VALUE();
#endif
#ifdef portALT_GET_RUN_TIME_COUNTER_VALUE
portALT_GET_RUN_TIME_COUNTER_VALUE( ulTotalRunTime );
#else
ulTotalRunTime = portGET_RUN_TIME_COUNTER_VALUE();
#endif
/* Add the amount of time the task has been running to the
accumulated time so far. The time the task started running was
stored in ulTaskSwitchedInTime. Note that there is no overflow
protection here so count values are only valid until the timer
overflows. The guard against negative values is to protect
against suspect run time stat counter implementations - which
are provided by the application, not the kernel. */
if( ulTotalRunTime > ulTaskSwitchedInTime )
{
pxCurrentTCB->ulRunTimeCounter += ( ulTotalRunTime - ulTaskSwitchedInTime );
}
else
{
mtCOVERAGE_TEST_MARKER();
}
ulTaskSwitchedInTime = ulTotalRunTime;
/* Add the amount of time the task has been running to the
accumulated time so far. The time the task started running was
stored in ulTaskSwitchedInTime. Note that there is no overflow
protection here so count values are only valid until the timer
overflows. The guard against negative values is to protect
against suspect run time stat counter implementations - which
are provided by the application, not the kernel. */
if( ulTotalRunTime > ulTaskSwitchedInTime )
{
pxCurrentTCB->ulRunTimeCounter += ( ulTotalRunTime - ulTaskSwitchedInTime );
}
else
{
mtCOVERAGE_TEST_MARKER();
}
ulTaskSwitchedInTime = ulTotalRunTime;
}
#endif /* configGENERATE_RUN_TIME_STATS */