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freertos: add thread local storage support in RISC-V port

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This commit is contained in:
Ivan Grokhotkov
2020-12-24 01:56:20 +01:00
committed by bot
parent 06f22fc4b0
commit b2aaebaf85
1 changed files with 18 additions and 7 deletions
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25
components/freertos/port/riscv/port.c
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@@ -192,19 +192,30 @@ int vPortSetInterruptMask(void)
StackType_t *pxPortInitialiseStack(StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters) StackType_t *pxPortInitialiseStack(StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters)
{ {
extern uint32_t __global_pointer$; extern uint32_t __global_pointer$;
uint8_t* task_thread_local_start;
uint8_t* threadptr;
extern char _thread_local_start, _thread_local_end, _rodata_start;
/* Simulate the stack frame as it would be created by a context switch /* Byte pointer, so that subsequent calculations don't depend on sizeof(StackType_t). */
interrupt. */ uint8_t* sp = (uint8_t*) pxTopOfStack;
pxTopOfStack -= RV_STK_FRMSZ;
RvExcFrame *frame = (RvExcFrame *)pxTopOfStack; /* Set up TLS area */
uint32_t thread_local_sz = (uint32_t) (&_thread_local_end - &_thread_local_start);
thread_local_sz = ALIGNUP(0x10, thread_local_sz);
sp -= thread_local_sz;
task_thread_local_start = sp;
memcpy(task_thread_local_start, &_thread_local_start, thread_local_sz);
threadptr = task_thread_local_start - (&_thread_local_start - &_rodata_start);
/* Simulate the stack frame as it would be created by a context switch interrupt. */
sp -= RV_STK_FRMSZ;
RvExcFrame *frame = (RvExcFrame *)sp;
memset(frame, 0, sizeof(*frame));
frame->ra = (UBaseType_t)prvTaskExitError; frame->ra = (UBaseType_t)prvTaskExitError;
frame->mepc = (UBaseType_t)pxCode; frame->mepc = (UBaseType_t)pxCode;
frame->a0 = (UBaseType_t)pvParameters; frame->a0 = (UBaseType_t)pvParameters;
frame->gp = (UBaseType_t)&__global_pointer$; frame->gp = (UBaseType_t)&__global_pointer$;
frame->a1 = 0x11111111; frame->tp = (UBaseType_t)threadptr;
frame->a2 = 0x22222222;
frame->a3 = 0x33333333;
//TODO: IDF-2393 //TODO: IDF-2393
return (StackType_t *)frame; return (StackType_t *)frame;