Add Geode GX2 memmory descriptors.
Add a simple README file.
Signed-off-by: Nils Jacobs <njacobs8@hetnet.nl>
Acked-by: Stefan Reinauer <stepan@coreboot.org>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6274 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/util/msrtool/README b/util/msrtool/README
new file mode 100644
index 0000000..d2a076c
--- /dev/null
+++ b/util/msrtool/README
@@ -0,0 +1,36 @@
+
+You need to be ROOT or use SUDO to execute MSRTOOL.
+
+Note that you need /dev/cpu/*/msr available to run msrtool in Linux.
+
+
+syntax: msrtool [-hvqrkl] [-c cpu] [-m system] [-t target ...]
+ [-i addr=hi[:]lo] | [-s file] | [-d [:]file] | addr...
+ -h show this help text
+ -v be verbose
+ -q be quiet (overrides -v)
+ -r include [Reserved] values
+ -k list all known systems and targets
+ -l list MSRs and bit fields for current target(s) (-kl for ALL targets!)
+ -c access MSRs on the specified CPU, default=0
+ -m force a system, e.g: -m linux
+ -t force a target, can be used multiple times, e.g: -t geodelx -t cs5536
+ -i immediate mode
+ decode hex addr=hi:lo for the target without reading hw value
+ e.g: -i 4c00000f=f2f100ff56960004
+ -s stream mode
+ read one MSR address per line and append current hw value to the line
+ use the filename - for stdin/stdout
+ using -l -s ignores input and will output all MSRs with values
+ -d diff mode
+ read one address and value per line and compare with current hw value,
+ printing differences to stdout. use the filename - to read from stdin
+ use :file or :- to reverse diff, normally hw values are considered new
+ addr.. direct mode, read and decode values for the given MSR address(es)
+
+
+Examples:
+
+msrtool 0x20000018
+
+./msrtool 0x200000{18,19,1a,1b,1c,1d} 0x4c0000{0f,14}