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#define _POSIX_C_SOURCE 199309L
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#define DEVICE "/dev/fpga0"
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#define BAR PCILIB_BAR0
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#define MASK ((1ll << BITS) - 1)
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#define WR(addr, value) { *(uint32_t*)(bar + addr) = value; }
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#define RD(addr, value) { value = *(uint32_t*)(bar + addr); }
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unsigned long long bits[BITS];
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int main(int argc, char *argv[]) {
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uint32_t reg, value, diff, errors;
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unsigned long long attempts = 0, failures = 0;
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printf("Usage: %s <register>\n", argv[0]);
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if (sscanf(argv[1], "%x", ®) != 1) {
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printf("Can't parse register %s\n", argv[1]);
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struct sched_param sched = {0};
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sched.sched_priority = sched_get_priority_min(SCHED_FIFO);
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if (sched_setscheduler(pid, SCHED_FIFO, &sched))
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printf("Warning: not able to get real-time priority\n");
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pci = pcilib_open(DEVICE, PCILIB_MODEL_DETECT);
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printf("pcilib_open\n");
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bar = pcilib_map_bar(pci, BAR);
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if (value != (i%MASK)) {
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diff = value ^ (i%MASK);
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for (errors = 0, j = 0; j < BITS; j++)
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if (diff&(1<<j)) errors++;
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//printf("written: %x, read: %x\n", i, value);
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if ((i % 1048576 ) == 0) {
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printf("Attempts %llu, failures %llu (", attempts, failures);
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for (j = 1; j < BITS; j++)
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printf("%llu ", bits[j]);
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pcilib_unmap_bar(pci, BAR, bar);