#include #include #include #include #include #include #include "flash.h" #if defined (__sun) && (defined(__i386) || defined(__amd64)) # define MEM_DEV "/dev/xsvc" #else # define MEM_DEV "/dev/mem" #endif static int fd_mem = -1; void *sys_physmap(unsigned long phys_addr, size_t len) { void *virt_addr; if (-1 == fd_mem) { /* Open the memory device UNCACHED. Important for MMIO. */ if (-1 == (fd_mem = open(MEM_DEV, O_RDWR|O_SYNC))) { perror("Critical error: open(" MEM_DEV ")"); exit(1); } } virt_addr = mmap(0, len, PROT_WRITE|PROT_READ, MAP_SHARED, fd_mem, (off_t)phys_addr); return MAP_FAILED == virt_addr ? NULL : virt_addr; } void physunmap(void *virt_addr, size_t len) { munmap(virt_addr, len); } void *physmap(const char *descr, unsigned long phys_addr, size_t len) { void *virt_addr = sys_physmap(phys_addr, len); if (NULL == virt_addr) { if (NULL == descr) descr = "memory"; fprintf(stderr, "Error accessing %s, 0x%lx bytes at 0x%08lx\n", descr, (unsigned long)len, phys_addr); perror(MEM_DEV " mmap failed"); if (EINVAL == errno) { fprintf(stderr, "In Linux this error can be caused by the CONFIG_NONPROMISC_DEVMEM (<2.6.27),\n"); fprintf(stderr, "CONFIG_STRICT_DEVMEM (>=2.6.27) and CONFIG_X86_PAT kernel options.\n"); fprintf(stderr, "Please check if either is enabled in your kernel before reporting a failure.\n"); fprintf(stderr, "You can override CONFIG_X86_PAT at boot with the nopat kernel parameter but\n"); fprintf(stderr, "disabling the other option unfortunately requires a kernel recompile. Sorry!\n"); } exit(1); } return virt_addr; }