[U-Boot] [PATCH] Add clarifications to the x86 README

[Igor Stoppa <igor.stoppa@intel.com>]

Explicitly list the targets supported in each section of the instructions
from the x86 README.

Signed-off-by: Igor Stoppa <igor.stoppa@intel.com>
---
 doc/README.x86 | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/doc/README.x86 b/doc/README.x86
index af2459c..1105afe 100644
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -19,14 +19,15 @@ work with minimal adjustments on other x86 boards since coreboot deals with
 most of the low-level details.
 
 U-Boot also supports booting directly from x86 reset vector without coreboot,
-aka raw support or bare support. Currently Link, QEMU x86 targets and all
-Intel boards support running U-Boot 'bare metal'.
+aka raw support or bare support. U-Boot becomes a replacement for the BIOS.
+Currently Link, QEMU x86 targets and all Intel boards support running U-Boot
+'bare metal'.
 
 As for loading an OS, U-Boot supports directly booting a 32-bit or 64-bit
 Linux kernel as part of a FIT image. It also supports a compressed zImage.
 
-Build Instructions
-------------------
+Build Instructions for U-Boot as coreboot payload
+-------------------------------------------------
 Building U-Boot as a coreboot payload is just like building U-Boot for targets
 on other architectures, like below:
 
@@ -48,6 +49,8 @@ Change the 'Board configuration file' and 'Board Device Tree Source (dts) file'
 to point to a new board. You can also change the Cache-As-RAM (CAR) related
 settings here if the default values do not fit your new board.
 
+Build Instructions for U-Boot as BIOS replacement (raw/bare mode)
+-----------------------------------------------------------------
 Building a ROM version of U-Boot (hereafter referred to as u-boot.rom) is a
 little bit tricky, as generally it requires several binary blobs which are not
 shipped in the U-Boot source tree. Due to this reason, the u-boot.rom build is
@@ -87,7 +90,7 @@ Now you can build U-Boot and obtain u-boot.rom:
 $ make chromebook_link_defconfig
 $ make all
 
-Intel Crown Bay specific instructions:
+Intel Crown Bay specific instructions (raw mode):
 
 U-Boot support of Intel Crown Bay board [4] relies on a binary blob called
 Firmware Support Package [5] to perform all the necessary initialization steps
@@ -122,7 +125,7 @@ Now you can build U-Boot and obtain u-boot.rom
 $ make crownbay_defconfig
 $ make all
 
-Intel Minnowboard Max instructions:
+Intel Minnowboard Max instructions (raw mode):
 
 This uses as FSP as with Crown Bay, except it is for the Atom E3800 series.
 Download this and get the .fd file (BAYTRAIL_FSP_GOLD_003_16-SEP-2014.fd at
@@ -189,7 +192,7 @@ Offset   Description         Controlling config
 Overall ROM image size is controlled by CONFIG_ROM_SIZE.
 
 
-Intel Galileo instructions:
+Intel Galileo instructions (raw mode):
 
 Only one binary blob is needed for Remote Management Unit (RMU) within Intel
 Quark SoC. Not like FSP, U-Boot does not call into the binary. The binary is
-- 
2.1.4