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author | Peter Stuge <peter@stuge.se> | 2009-01-22 22:53:59 +0000 |
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committer | Peter Stuge <peter@stuge.se> | 2009-01-22 22:53:59 +0000 |
commit | 72c9668b9535bfe40d3e321faa26cfe5bb9a44b3 (patch) | |
tree | f002bdae8d1af4c4f46f6540c73772a34c028a92 | |
parent | 37179b807c416a4e7030a414454a3de484c1114c (diff) | |
download | ast2050-flashrom-72c9668b9535bfe40d3e321faa26cfe5bb9a44b3.zip ast2050-flashrom-72c9668b9535bfe40d3e321faa26cfe5bb9a44b3.tar.gz |
Provide some hints for the user in case /dev/mem mmap fails
Resolves #121
Corresponding to flashrom svn r385 and coreboot v2 svn r3889.
Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
-rw-r--r-- | flashrom.c | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -139,6 +139,13 @@ struct flashchip *probe_flash(struct flashchip *first_flash, int force) 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; |