diff options
Diffstat (limited to 'usr.sbin/pciconf/pciconf.8')
| -rw-r--r-- | usr.sbin/pciconf/pciconf.8 | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/usr.sbin/pciconf/pciconf.8 b/usr.sbin/pciconf/pciconf.8 index f0f47b8aabf9..eb2e038d7e82 100644 --- a/usr.sbin/pciconf/pciconf.8 +++ b/usr.sbin/pciconf/pciconf.8 @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd November 23, 2015 +.Dd June 14, 2018 .Dt PCICONF 8 .Os .Sh NAME @@ -40,6 +40,8 @@ .Fl r Oo Fl b | h Oc Ar device addr Ns Op : Ns Ar addr2 .Nm .Fl w Oo Fl b | h Oc Ar device addr value +.Nm +.Fl D Oo Fl b | h | x Oc Ar device addr Op start Ns Op : Ns Ar count .Sh DESCRIPTION The .Nm @@ -305,17 +307,38 @@ into a configuration space register at byte offset .Ar addr of device .Ar selector . -For both operations, the flags -.Fl b +.Pp +The +.Fl D +option request a dump of the specified BAR. +Dump is performed to the standard output, raw register values +are written. +Use +.Xr hexdump 1 +to convert them to human-readable dump, +or redirect into a file to save the snapshot of the device state. +Optionally, the +.Ar start and -.Fl h +.Ar count +of the registers dumped can be specified, in multiple of the operation width, +see next paragraph. +.Pp +For read, write, and dump operations, the flags +.Fl b , +.Fl h , +and +.Fl x select the width of the operation; .Fl b indicates a byte operation, and .Fl h indicates a halfword (two-byte) operation. +.Fl x +indicates a quadword (four-byte) operation. The default is to read or write a longword (four bytes). +The quadword mode is only valid for BAR dump. .Sh ENVIRONMENT PCI vendor and device information is read from .Pa /usr/local/share/pciids/pci.ids . @@ -368,3 +391,11 @@ to provide the device with a driver KLD, and reading of configuration space registers may cause a failure in badly designed .Tn PCI chips. +.Pp +There is currently no way to specify the caching mode for the mapping +established by the +.Fl D +option, +.Nm +always uses uncached access. +This is fine for control register BARs. |