18 lines
505 B
C
18 lines
505 B
C
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#include <stdio.h>
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#include <inttypes.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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__attribute__((stdcall)) uint32_t pci_read(uint32_t bus, uint32_t dev, uint32_t fun, uint32_t offset, size_t len) {
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char path[128];
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uint32_t value = 0;
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sprintf(path, "/sys/bus/pci/devices/%4.4u:%2.2u:%2.2u.%u/config", 0, bus, dev, fun);
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int fd = open(path, O_RDONLY);
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lseek(fd, offset, SEEK_SET);
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read(fd, &value, len);
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close(fd);
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return value;
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}
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