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%016jx [0x%zx] ERRNO=%d %s\n",
22  		       (uintmax_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%016jx [0x%zx] ERRNO=%d %s\n",
39  		       (uintmax_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