X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=README;h=89646725a0b884c5b8b10e4262a1682478788a29;hb=7b06b66cd7f9f4d33cfd3e68046c094a43024cda;hp=3ddec77980a896984fefdde712ba057d658d970a;hpb=1086c5d6f8541460f0f10e4a302d8aac27e0e6e0;p=u-boot

diff --git a/README b/README
index 3ddec77980..89646725a0 100644
--- a/README
+++ b/README
@@ -1,5 +1,5 @@
 #
-# (C) Copyright 2000 - 2011
+# (C) Copyright 2000 - 2012
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 #
 # See file CREDITS for list of people who contributed to this
@@ -420,6 +420,12 @@ The following options need to be configured:
 		XWAY SoCs for booting from NOR flash. The U-Boot image needs to
 		be swapped if a flash programmer is used.
 
+- ARM options:
+		CONFIG_SYS_EXCEPTION_VECTORS_HIGH
+
+		Select high exception vectors of the ARM core, e.g., do not
+		clear the V bit of the c1 register of CP15.
+
 - Linux Kernel Interface:
 		CONFIG_CLOCKS_IN_MHZ
 
@@ -564,7 +570,7 @@ The following options need to be configured:
 
 		CONFIG_CFB_CONSOLE
 		Enables console device for a color framebuffer. Needs following
-		defines (cf. smiLynxEM, i8042, board/eltec/bab7xx)
+		defines (cf. smiLynxEM, i8042)
 			VIDEO_FB_LITTLE_ENDIAN	graphic memory organisation
 						(default big endian)
 			VIDEO_HW_RECTFILL	graphic chip supports
@@ -638,6 +644,32 @@ The following options need to be configured:
 		'Sane' compilers will generate smaller code if
 		CONFIG_PRE_CON_BUF_SZ is a power of 2
 
+- Pre-console putc():
+		Prior to the console being initialised, console output is
+		normally silently discarded. This can be annoying if a
+		panic() happens in this time.
+
+		If the CONFIG_PRE_CONSOLE_PUTC option is defined, then
+		U-Boot will call board_pre_console_putc() for each output
+		character in this case, This function should try to output
+		the character if possible, perhaps on all available UARTs
+		(it will need to do this directly, since the console code
+		is not functional yet). Note that if the panic happens
+		early enough, then it is possible that board_init_f()
+		(or even arch_cpu_init() on ARM) has not been called yet.
+		You should init all clocks, GPIOs, etc. that are needed
+		to get the character out. Baud rates will need to default
+		to something sensible.
+
+- Safe printf() functions
+		Define CONFIG_SYS_VSNPRINTF to compile in safe versions of
+		the printf() functions. These are defined in
+		include/vsprintf.h and include snprintf(), vsnprintf() and
+		so on. Code size increase is approximately 300-500 bytes.
+		If this option is not given then these functions will
+		silently discard their buffer size argument - this means
+		you are not getting any overflow checking in this case.
+
 - Boot Delay:	CONFIG_BOOTDELAY - in seconds
 		Delay before automatically booting the default image;
 		set to -1 to disable autoboot.
@@ -783,6 +815,7 @@ The following options need to be configured:
 					  (requires CONFIG_CMD_I2C)
 		CONFIG_CMD_SETGETDCR	  Support for DCR Register access
 					  (4xx only)
+		CONFIG_CMD_SF		* Read/write/erase SPI NOR flash
 		CONFIG_CMD_SHA1SUM	  print sha1 memory digest
 					  (requires CONFIG_CMD_MEMORY)
 		CONFIG_CMD_SOURCE	  "source" command Support
@@ -1003,6 +1036,9 @@ The following options need to be configured:
 			If this defined, the driver is quiet.
 			The driver doen't show link status messages.
 
+		CONFIG_CALXEDA_XGMAC
+		Support for the Calxeda XGMAC device
+
 		CONFIG_DRIVER_LAN91C96
 		Support for SMSC's LAN91C96 chips.
 
@@ -1168,6 +1204,14 @@ The following options need to be configured:
 			for your device
 			- CONFIG_USBD_PRODUCTID 0xFFFF
 
+- ULPI Layer Support:
+		The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via
+		the generic ULPI layer. The generic layer accesses the ULPI PHY
+		via the platform viewport, so you need both the genric layer and
+		the viewport enabled. Currently only Chipidea/ARC based
+		viewport is supported.
+		To enable the ULPI layer support, define CONFIG_USB_ULPI and
+		CONFIG_USB_ULPI_VIEWPORT in your board configuration file.
 
 - MMC Support:
 		The MMC controller on the Intel PXA is supported. To
@@ -2154,6 +2198,25 @@ The following options need to be configured:
 		allows to read/write in Dataflash via the standard
 		commands cp, md...
 
+- Serial Flash support
+		CONFIG_CMD_SF
+
+		Defining this option enables SPI flash commands
+		'sf probe/read/write/erase/update'.
+
+		Usage requires an initial 'probe' to define the serial
+		flash parameters, followed by read/write/erase/update
+		commands.
+
+		The following defaults may be provided by the platform
+		to handle the common case when only a single serial
+		flash is present on the system.
+
+		CONFIG_SF_DEFAULT_BUS		Bus identifier
+		CONFIG_SF_DEFAULT_CS		Chip-select
+		CONFIG_SF_DEFAULT_MODE 		(see include/spi.h)
+		CONFIG_SF_DEFAULT_SPEED		in Hz
+
 - SystemACE Support:
 		CONFIG_SYSTEMACE
 
@@ -3602,6 +3665,14 @@ List of environment variables (most likely not complete):
 
   fdt_high	- if set this restricts the maximum address that the
 		  flattened device tree will be copied into upon boot.
+		  For example, if you have a system with 1 GB memory
+		  at physical address 0x10000000, while Linux kernel
+		  only recognizes the first 704 MB as low memory, you
+		  may need to set fdt_high as 0x3C000000 to have the
+		  device tree blob be copied to the maximum address
+		  of the 704 MB low memory, so that Linux kernel can
+		  access it during the boot procedure.
+
 		  If this is set to the special value 0xFFFFFFFF then
 		  the fdt will not be copied at all on boot.  For this
 		  to work it must reside in writable memory, have