Hint poly_crc (void * list_ptr, Huint size)
{
Hint result = SUCCESS;
// Use Accelerator?
Hbool use_accelerator = poly_init(CRC, size);
// Start transferring data to BRAM
if(transfer_dma( (void *) list_ptr, (void *) ACC_BRAMC, size *4))
return FAILURE;
if (use_accelerator) {
int e = 0;
putfslx( size, 0, FSL_DEFAULT);//send end address
putfslx( 0, 0, FSL_DEFAULT); //send start address
getfslx(e, 0, FSL_DEFAULT);
if (e != 1) return FAILURE;
} else {
Huint vhwti_base = 0;
// Get VHWTI from PVRs
getpvr(1,vhwti_base);
hthread_time_t start = hthread_time_get();
// Run crc in software
result = (sw_crc((void *) ACC_BRAMC, size));
hthread_time_t stop = hthread_time_get();
hthread_time_t diff;
hthread_time_diff(diff, stop,start);
volatile hthread_time_t * ptr = (hthread_time_t *) (vhwti_base + 0x100);
*ptr += diff;
}
// Start transferring data from BRAM
if(transfer_dma( (void *) ACC_BRAMC, (void *) list_ptr, size *4))
return FAILURE;
return result;
}
Hint sw_crc(void * list_ptr, Huint size) {
// Set up DMA structure
dma_t local_dma;
dma_config_t local_dma_config;
local_dma_config.base = ACCELERATOR_DMA_BASEADDR;
dma_create(&local_dma, &local_dma_config);
// Transfer List A to local BRAM A using local dma
if(transfer_dma(&local_dma, (void *) list_ptr, (void *) ACC_BRAM_A, size*4))
return FAILURE;
Hint *array = (Hint *) ACC_BRAM_A;
for (array = (Hint *) ACC_BRAM_A; array < (Hint *) ACC_BRAM_A + size; array++) {
*array = gen_crc(*array);
}
// Transfer results back
if(transfer_dma(&local_dma, (void *) ACC_BRAM_A, (void *) list_ptr, size*4))
return FAILURE;
else
return SUCCESS;
}