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-rw-r--r--doc/README.x8618
1 files changed, 17 insertions, 1 deletions
diff --git a/doc/README.x86 b/doc/README.x86
index 5fab044..b474161 100644
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -110,9 +110,25 @@ be turned on. Not every device on the board is configured via devie tree, but
more and more devices will be added as time goes by. Check out the directory
arch/x86/dts/ for these device tree source files.
+Useful Commands
+---------------
+
+In keeping with the U-Boot philosophy of providing functions to check and
+adjust internal settings, there are several x86-specific commands that may be
+useful:
+
+hob - Display information about Firmware Support Package (FSP) Hand-off
+ Block. This is only available on platforms which use FSP, mostly
+ Atom.
+iod - Display I/O memory
+iow - Write I/O memory
+mtrr - List and set the Memory Type Range Registers (MTRR). These are used to
+ tell the CPU whether memory is cacheable and if so the cache write
+ mode to use. U-Boot sets up some reasonable values but you can
+ adjust then with this command.
+
TODO List
---------
-- MTRR support (for performance)
- Audio
- Chrome OS verified boot
- SMI and ACPI support, to provide platform info and facilities to Linux