X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=README;h=68dab2d1e3c4f1484f3d0dd4a81008b650b803a6;hb=f0c0b3a9e6f28a34d6da5edabba1e874fdf8e675;hp=ba4fdd44a3e7f60dac0096dc09a9f42c03e0222c;hpb=d32a1a4caa2a2ca7c385f4489167e170bf7fb5c1;p=oweals%2Fu-boot.git

diff --git a/README b/README
index ba4fdd44a3..68dab2d1e3 100644
--- a/README
+++ b/README
@@ -356,6 +356,13 @@ The following options need to be configured:
 		Define this option if you want to enable the
 		ICache only when Code runs from RAM.
 
+- 85xx CPU Options:
+		CONFIG_SYS_FSL_TBCLK_DIV
+
+		Defines the core time base clock divider ratio compared to the
+		system clock.  On most PQ3 devices this is 8, on newer QorIQ
+		devices it can be 16 or 32.  The ratio varies from SoC to Soc.
+
 - Intel Monahans options:
 		CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO
 
@@ -468,6 +475,18 @@ The following options need to be configured:
 		define this to a list of base addresses for each (supported)
 		port. See e.g. include/configs/versatile.h
 
+		CONFIG_PL011_SERIAL_RLCR
+
+		Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500)
+		have separate receive and transmit line control registers.  Set
+		this variable to initialize the extra register.
+
+		CONFIG_PL011_SERIAL_FLUSH_ON_INIT
+
+		On some platforms (e.g. U8500) U-Boot is loaded by a second stage
+		boot loader that has already initialized the UART.  Define this
+		variable to flush the UART at init time.
+
 
 - Console Interface:
 		Depending on board, define exactly one serial port
@@ -646,6 +665,7 @@ The following options need to be configured:
 		CONFIG_CMD_FLASH	  flinfo, erase, protect
 		CONFIG_CMD_FPGA		  FPGA device initialization support
 		CONFIG_CMD_GO		* the 'go' command (exec code)
+		CONFIG_CMD_GREPENV	* search environment
 		CONFIG_CMD_HWFLOW	* RTS/CTS hw flow control
 		CONFIG_CMD_I2C		* I2C serial bus support
 		CONFIG_CMD_IDE		* IDE harddisk support
@@ -1095,13 +1115,10 @@ The following options need to be configured:
 			CONFIG_VIDEO_LOGO
 			CONFIG_VIDEO_BMP_LOGO
 
-		The DIU driver will look for the 'monitor' environment variable,
-		and if defined, enable the DIU as a console during boot.  This
-		variable should be set to one of these values:
-
-			'0'	Output video to the DVI connector
-			'1'	Output video to the LVDS connector
-			'2'	Output video to the Dual-Link LVDS connector
+		The DIU driver will look for the 'video-mode' environment
+		variable, and if defined, enable the DIU as a console during
+		boot.  See the documentation file README.video for a
+		description of this variable.
 
 - Keyboard Support:
 		CONFIG_KEYBOARD
@@ -1305,7 +1322,6 @@ The following options need to be configured:
 		driver in use must provide a function: mcast() to join/leave a
 		multicast group.
 
-		CONFIG_BOOTP_RANDOM_DELAY
 - BOOTP Recovery Mode:
 		CONFIG_BOOTP_RANDOM_DELAY
 
@@ -2362,7 +2378,10 @@ Configuration Settings:
 		used) must be put below this limit, unless "bootm_low"
 		enviroment variable is defined and non-zero. In such case
 		all data for the Linux kernel must be between "bootm_low"
-		and "bootm_low" + CONFIG_SYS_BOOTMAPSZ.
+		and "bootm_low" + CONFIG_SYS_BOOTMAPSZ.  The environment
+		variable "bootm_mapsize" will override the value of
+		CONFIG_SYS_BOOTMAPSZ.  If CONFIG_SYS_BOOTMAPSZ is undefined,
+		then the value in "bootm_size" will be used instead.
 
 - CONFIG_SYS_BOOT_RAMDISK_HIGH:
 		Enable initrd_high functionality.  If defined then the
@@ -2750,6 +2769,14 @@ Low Level (hardware related) configuration options:
 		source code. It is used to make hardware dependant
 		initializations.
 
+- CONFIG_IDE_AHB:
+		Most IDE controllers were designed to be connected with PCI
+		interface. Only few of them were designed for AHB interface.
+		When software is doing ATA command and data transfer to
+		IDE devices through IDE-AHB controller, some additional
+		registers accessing to these kind of IDE-AHB controller
+		is requierd.
+
 - CONFIG_SYS_IMMR:	Physical address of the Internal Memory.
 		DO NOT CHANGE unless you know exactly what you're
 		doing! (11-4) [MPC8xx/82xx systems only]
@@ -3204,7 +3231,16 @@ List of environment variables (most likely not complete):
 		  for use by the bootm command. See also "bootm_size"
 		  environment variable. Address defined by "bootm_low" is
 		  also the base of the initial memory mapping for the Linux
-		  kernel -- see the description of CONFIG_SYS_BOOTMAPSZ.
+		  kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and
+		  bootm_mapsize.
+
+  bootm_mapsize	- Size of the initial memory mapping for the Linux kernel.
+		  This variable is given as a hexadecimal number and it
+		  defines the size of the memory region starting at base
+		  address bootm_low that is accessible by the Linux kernel
+		  during early boot.  If unset, CONFIG_SYS_BOOTMAPSZ is used
+		  as the default value if it is defined, and bootm_size is
+		  used otherwise.
 
   bootm_size	- Memory range available for image processing in the bootm
 		  command can be restricted. This variable is given as