util/intelmetool/mmap.c

   1 /* intelmetool */
   2 /* SPDX-License-Identifier: GPL-2.0-or-later */
   3
   4 #include "mmap.h"
   5 #include <errno.h>
   6 #include <string.h>
   7
   8 #ifndef __DARWIN__
   9 int fd_mem;
  10
  11 void *map_physical_exact(off_t phys_addr, void *mapto, size_t len)
  12 {
  13         void *virt_addr;
  14         int err;
  15
  16         virt_addr = mmap(mapto, len, PROT_WRITE | PROT_READ,
  17                          MAP_SHARED | MAP_FIXED, fd_mem, phys_addr);
  18
  19         if (virt_addr == MAP_FAILED) {
  20                 err = errno;
  21                 printf("Error mapping physical memory 0x%016jd [0x%zx] ERRNO=%d %s\n",
  22                        (intmax_t)phys_addr, len, err, strerror(err));
  23                 return NULL;
  24         }
  25
  26         return virt_addr;
  27 }
  28
  29 void *map_physical(off_t phys_addr, size_t len)
  30 {
  31         void *virt_addr;
  32         int err;
  33
  34         virt_addr = mmap(NULL, len, PROT_WRITE | PROT_READ, MAP_SHARED, fd_mem, phys_addr);
  35
  36         if (virt_addr == MAP_FAILED) {
  37                 err = errno;
  38                 printf("Error mapping physical memory 0x%016jd [0x%zx] ERRNO=%d %s\n",
  39                        (intmax_t)phys_addr, len, err, strerror(err));
  40                 return NULL;
  41         }
  42
  43         return virt_addr;
  44 }
  45
  46 void unmap_physical(void *virt_addr, size_t len)
  47 {
  48         munmap(virt_addr, len);
  49 }
  50 #endif