9 #include <DirectIO/darwinio.h>
11 #define MEM_DEV "DirectIO"
13 void *sys_physmap(unsigned long phys_addr, size_t len)
15 return map_physical(phys_addr, len);
18 void physunmap(void *virt_addr, size_t len)
20 unmap_physical(virt_addr, len);
26 #if defined (__sun) && (defined(__i386) || defined(__amd64))
27 # define MEM_DEV "/dev/xsvc"
29 # define MEM_DEV "/dev/mem"
32 static int fd_mem = -1;
34 void *sys_physmap(unsigned long phys_addr, size_t len)
39 /* Open the memory device UNCACHED. Important for MMIO. */
40 if (-1 == (fd_mem = open(MEM_DEV, O_RDWR|O_SYNC))) {
41 perror("Critical error: open(" MEM_DEV ")");
46 virt_addr = mmap(0, len, PROT_WRITE|PROT_READ, MAP_SHARED, fd_mem, (off_t)phys_addr);
47 return MAP_FAILED == virt_addr ? NULL : virt_addr;
50 void physunmap(void *virt_addr, size_t len)
52 munmap(virt_addr, len);
56 void *physmap(const char *descr, unsigned long phys_addr, size_t len)
58 void *virt_addr = sys_physmap(phys_addr, len);
60 if (NULL == virt_addr) {
63 fprintf(stderr, "Error accessing %s, 0x%lx bytes at 0x%08lx\n", descr, (unsigned long)len, phys_addr);
64 perror(MEM_DEV " mmap failed");
65 if (EINVAL == errno) {
66 fprintf(stderr, "In Linux this error can be caused by the CONFIG_NONPROMISC_DEVMEM (<2.6.27),\n");
67 fprintf(stderr, "CONFIG_STRICT_DEVMEM (>=2.6.27) and CONFIG_X86_PAT kernel options.\n");
68 fprintf(stderr, "Please check if either is enabled in your kernel before reporting a failure.\n");
69 fprintf(stderr, "You can override CONFIG_X86_PAT at boot with the nopat kernel parameter but\n");
70 fprintf(stderr, "disabling the other option unfortunately requires a kernel recompile. Sorry!\n");