Add function for VDAT processing.

This CL is a user space counterpart of
http://codereview.chromium.org/6690023, which provided the
ability to retrieve buffers through chromeos_acpi driver.

The buffer contents is communicated as a multi line string
with each buffer byte represented as a two symbol hex
number. `crosstool', on the other has to map the buffer
contents into a certain binary structure. This CL add
conversion of the multiline string into a binary buffer and
also adds a temp. routine to dump the buffer contents on the
screen when `crosstool' is invoked.

Change-Id: I8dd3eb935332f9bc8769c71de0db302365f12d70

BUG=chromium-os:13069, chromium-os:13091
TEST=manual

- Install the new image on a target with firmware providing
 the VDAT ACPI method.

- Run crosstool and watch for the last line:
vdat                   =  11 22 33 44 ff 1f 1c 40 ff 57 74 41 ff ff ff ff # Raw VDAT contents.
localhost tmp #

Review URL: http://codereview.chromium.org/6695012

1 files changed, 1 insertions, 0 deletions

diff --git a/utility/crossystem_main.c b/utility/crossystem_main.c
index 90ad718b..4d6cd48a 100644
--- a/utility/crossystem_main.c
+++ b/utility/crossystem_main.c
@@ -49,6 +49,7 @@ const Param sys_param_list[] = {
   {"recovery_request", 0, 1, "Recovery mode request (writable)"},
   {"dbg_reset", 0, 1, "Debug reset mode request (writable)"},
   {"fwb_tries", 0, 1, "Try firmware B count (writable)"},
+  {"vdat", 1, 0, "Raw VDAT contents."},
 
   /* TODO: implement the following:
    *   nvram_cleared