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Basic 64-bit RISC-V port now functional. RISC-V port layer automatically switches between 32-bit and 64-bit.

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This commit is contained in:
Richard Barry 2019-04-29 00:57:14 +00:00
parent 27ca5c8341
commit 079d081346
2 changed files with 37 additions and 22 deletions
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6
FreeRTOS/Source/portable/GCC/RISC-V/port.c
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@ -74,7 +74,7 @@ void vPortSetupTimerInterrupt( void ) __attribute__(( weak ));
/* Used to program the machine timer compare register. */
uint64_t ullNextTime = 0ULL;
const uint64_t *pullNextTime = &ullNextTime;
const uint32_t ulTimerIncrementsForOneTick = ( uint32_t ) ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ); /* Assumes increment won't go over 32-bits. */
const size_t uxTimerIncrementsForOneTick = ( size_t ) ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ); /* Assumes increment won't go over 32-bits. */
volatile uint64_t * const pullMachineTimerCompareRegister = ( volatile uint64_t * const ) ( configCLINT_BASE_ADDRESS + 0x4000 );
/* Set configCHECK_FOR_STACK_OVERFLOW to 3 to add ISR stack checking to task
@ -120,11 +120,11 @@ task stack, not the ISR stack). */
ullNextTime = ( uint64_t ) ulCurrentTimeHigh;
ullNextTime <<= 32ULL;
ullNextTime |= ( uint64_t ) ulCurrentTimeLow;
ullNextTime += ( uint64_t ) ulTimerIncrementsForOneTick;
ullNextTime += ( uint64_t ) uxTimerIncrementsForOneTick;
*pullMachineTimerCompareRegister = ullNextTime;
/* Prepare the time to use after the next tick interrupt. */
ullNextTime += ( uint64_t ) ulTimerIncrementsForOneTick;
ullNextTime += ( uint64_t ) uxTimerIncrementsForOneTick;
}
#endif /* ( configCLINT_BASE_ADDRESS != 0 ) */