Stefan Reinauer | 0593f21 | 2009-01-26 01:10:48 +0000 | [diff] [blame] | 1 | #include <sys/types.h> |
| 2 | #include <sys/stat.h> |
| 3 | #include <fcntl.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <errno.h> |
| 6 | #include "flash.h" |
| 7 | |
Stefan Reinauer | f79edb9 | 2009-01-26 01:23:31 +0000 | [diff] [blame^] | 8 | #ifdef __DARWIN__ |
| 9 | #include <DirectIO/darwinio.h> |
| 10 | |
| 11 | #define MEM_DEV "DirectIO" |
| 12 | |
| 13 | void *sys_physmap(unsigned long phys_addr, size_t len) |
| 14 | { |
| 15 | return map_physical(phys_addr, len); |
| 16 | } |
| 17 | |
| 18 | void physunmap(void *virt_addr, size_t len) |
| 19 | { |
| 20 | unmap_physical(virt_addr, len); |
| 21 | } |
| 22 | |
| 23 | #else |
| 24 | #include <sys/mman.h> |
| 25 | |
Stefan Reinauer | 0593f21 | 2009-01-26 01:10:48 +0000 | [diff] [blame] | 26 | #if defined (__sun) && (defined(__i386) || defined(__amd64)) |
| 27 | # define MEM_DEV "/dev/xsvc" |
| 28 | #else |
| 29 | # define MEM_DEV "/dev/mem" |
| 30 | #endif |
| 31 | |
| 32 | static int fd_mem = -1; |
| 33 | |
| 34 | void *sys_physmap(unsigned long phys_addr, size_t len) |
| 35 | { |
| 36 | void *virt_addr; |
| 37 | |
| 38 | if (-1 == fd_mem) { |
| 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 ")"); |
| 42 | exit(1); |
| 43 | } |
| 44 | } |
| 45 | |
| 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; |
| 48 | } |
| 49 | |
| 50 | void physunmap(void *virt_addr, size_t len) |
| 51 | { |
| 52 | munmap(virt_addr, len); |
| 53 | } |
Stefan Reinauer | f79edb9 | 2009-01-26 01:23:31 +0000 | [diff] [blame^] | 54 | #endif |
Stefan Reinauer | 0593f21 | 2009-01-26 01:10:48 +0000 | [diff] [blame] | 55 | |
| 56 | void *physmap(const char *descr, unsigned long phys_addr, size_t len) |
| 57 | { |
| 58 | void *virt_addr = sys_physmap(phys_addr, len); |
| 59 | |
| 60 | if (NULL == virt_addr) { |
| 61 | if (NULL == descr) |
| 62 | descr = "memory"; |
| 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"); |
| 71 | } |
| 72 | exit(1); |
| 73 | } |
| 74 | |
| 75 | return virt_addr; |
| 76 | } |