[coreboot] r3889 - trunk/util/flashrom
svn at coreboot.org
svn at coreboot.org
Thu Jan 22 23:54:00 CET 2009
Author: stuge
Date: 2009-01-22 23:53:59 +0100 (Thu, 22 Jan 2009)
New Revision: 3889
Modified:
trunk/util/flashrom/flashrom.c
Log:
flashrom: Provide some hints for the user in case /dev/mem mmap fails.
resolves #121
Signed-off-by: Peter Stuge <peter at stuge.se>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>
Modified: trunk/util/flashrom/flashrom.c
===================================================================
--- trunk/util/flashrom/flashrom.c 2009-01-21 01:56:53 UTC (rev 3888)
+++ trunk/util/flashrom/flashrom.c 2009-01-22 22:53:59 UTC (rev 3889)
@@ -139,6 +139,13 @@
fd_mem, (off_t) base);
if (bios == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
+ 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);
}
flash->virtual_memory = bios;
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