forked from zamaudio/intelmetool
/
mmap.c
45 lines (35 loc) · 1.08 KB
/
mmap.c
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#include "mmap.h"
#include <errno.h>
int fd_mem;
void *map_physical_exact(uint64_t phys_addr, uint64_t mapto, size_t len)
{
void *virt_addr;
int err;
virt_addr = mmap(mapto, len, PROT_WRITE | PROT_READ, MAP_SHARED|MAP_FIXED,
fd_mem, (off_t) phys_addr);
if (virt_addr == MAP_FAILED) {
err = errno;
printf("Error mapping physical memory 0x%016" PRIx64 "[0x%zx] ERRNO=%d\n",
phys_addr, len, err);
return NULL;
}
return virt_addr;
}
void *map_physical(uint64_t phys_addr, size_t len)
{
void *virt_addr;
int err;
virt_addr = mmap(NULL, len, PROT_WRITE | PROT_READ, MAP_SHARED,
fd_mem, (off_t) phys_addr);
if (virt_addr == MAP_FAILED) {
err = errno;
printf("Error mapping physical memory 0x%016" PRIx64 "[0x%zx] ERRNO=%d\n",
phys_addr, len, err);
return NULL;
}
return virt_addr;
}
void unmap_physical(void *virt_addr, size_t len)
{
munmap(virt_addr, len);
}