powerpc/t4240qds: Update DDR timing table

[platform/kernel/u-boot.git] / README

diff --git a/README b/README
index da8b68a..0d37d56 100644 (file)
--- a/README
+++ b/README
@@ -634,14 +634,6 @@ The following options need to be configured:
                boot loader that has already initialized the UART.  Define this
                variable to flush the UART at init time.
 
                boot loader that has already initialized the UART.  Define this
                variable to flush the UART at init time.
 

-               CONFIG_SYS_NS16550_BROKEN_TEMT
-
-               16550 UART set the Transmitter Empty (TEMT) Bit when all output
-               has finished and the transmitter is totally empty. U-Boot waits
-               for this bit to be set to initialize the serial console. On some
-               broken platforms this bit is not set in SPL making U-Boot to
-               hang while waiting for TEMT. Define this option to avoid it.
-

 
 - Console Interface:
                Depending on board, define exactly one serial port
 
 - Console Interface:
                Depending on board, define exactly one serial port


@@ -938,6 +930,13 @@ The following options need to be configured:
 
                XXX - this list needs to get updated!
 
 
                XXX - this list needs to get updated!
 

+- Regular expression support:
+               CONFIG_REGEX
+                If this variable is defined, U-Boot is linked against
+                the SLRE (Super Light Regular Expression) library,
+                which adds regex support to some commands, as for
+                example "env grep" and "setexpr".
+

 - Device tree:
                CONFIG_OF_CONTROL
                If this variable is defined, U-Boot will use a device tree
 - Device tree:
                CONFIG_OF_CONTROL
                If this variable is defined, U-Boot will use a device tree


@@ -2839,8 +2838,18 @@ FIT uImage format:
                CONFIG_SPL_LDSCRIPT
                LDSCRIPT for linking the SPL binary.
 
                CONFIG_SPL_LDSCRIPT
                LDSCRIPT for linking the SPL binary.
 

+               CONFIG_SPL_MAX_FOOTPRINT
+               Maximum size in memory allocated to the SPL, BSS included.
+               When defined, the linker checks that the actual memory
+               used by SPL from _start to __bss_end does not exceed it.
+               CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE
+               must not be both defined at the same time.
+

                CONFIG_SPL_MAX_SIZE
                CONFIG_SPL_MAX_SIZE

-               Maximum binary size (text, data and rodata) of the SPL binary.
+               Maximum size of the SPL image (text, data, rodata, and
+               linker lists sections), BSS excluded.
+               When defined, the linker checks that the actual size does
+               not exceed it.

 
                CONFIG_SPL_TEXT_BASE
                TEXT_BASE for linking the SPL binary.
 
                CONFIG_SPL_TEXT_BASE
                TEXT_BASE for linking the SPL binary.


@@ -2853,7 +2862,11 @@ FIT uImage format:
                Link address for the BSS within the SPL binary.
 
                CONFIG_SPL_BSS_MAX_SIZE
                Link address for the BSS within the SPL binary.
 
                CONFIG_SPL_BSS_MAX_SIZE

-               Maximum binary size of the BSS section of the SPL binary.
+               Maximum size in memory allocated to the SPL BSS.
+               When defined, the linker checks that the actual memory used
+               by SPL from __bss_start to __bss_end does not exceed it.
+               CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE
+               must not be both defined at the same time.

 
                CONFIG_SPL_STACK
                Adress of the start of the stack SPL will use
 
                CONFIG_SPL_STACK
                Adress of the start of the stack SPL will use


@@ -2972,8 +2985,11 @@ FIT uImage format:
                Support for lib/libgeneric.o in SPL binary
 
                CONFIG_SPL_PAD_TO
                Support for lib/libgeneric.o in SPL binary
 
                CONFIG_SPL_PAD_TO

-               Linker address to which the SPL should be padded before
-               appending the SPL payload.
+               Image offset to which the SPL should be padded before appending
+               the SPL payload. By default, this is defined as
+               CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined.
+               CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL
+               payload without any padding, or >= CONFIG_SPL_MAX_SIZE.

 
                CONFIG_SPL_TARGET
                Final target image containing SPL and payload.  Some SPLs
 
                CONFIG_SPL_TARGET
                Final target image containing SPL and payload.  Some SPLs


@@ -3239,6 +3255,15 @@ Configuration Settings:
                digits and dots.  Recommended value: 45 (9..1) for 80
                column displays, 15 (3..1) for 40 column displays.
 
                digits and dots.  Recommended value: 45 (9..1) for 80
                column displays, 15 (3..1) for 40 column displays.
 

+- CONFIG_FLASH_VERIFY
+               If defined, the content of the flash (destination) is compared
+               against the source after the write operation. An error message
+               will be printed when the contents are not identical.
+               Please note that this option is useless in nearly all cases,
+               since such flash programming errors usually are detected earlier
+               while unprotecting/erasing/programming. Please only enable
+               this option if you really know what you are doing.
+

 - CONFIG_SYS_RX_ETH_BUFFER:
                Defines the number of Ethernet receive buffers. On some
                Ethernet controllers it is recommended to set this value
 - CONFIG_SYS_RX_ETH_BUFFER:
                Defines the number of Ethernet receive buffers. On some
                Ethernet controllers it is recommended to set this value


@@ -3548,6 +3573,33 @@ but it can not erase, write this NOR flash by SRIO or PCIE interface.
        environment. If redundant environment is used, it will be copied to
        CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE.
 
        environment. If redundant environment is used, it will be copied to
        CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE.
 

+- CONFIG_ENV_IS_IN_UBI:
+
+       Define this if you have an UBI volume that you want to use for the
+       environment.  This has the benefit of wear-leveling the environment
+       accesses, which is important on NAND.
+
+       - CONFIG_ENV_UBI_PART:
+
+         Define this to a string that is the mtd partition containing the UBI.
+
+       - CONFIG_ENV_UBI_VOLUME:
+
+         Define this to the name of the volume that you want to store the
+         environment in.
+
+       - CONFIG_ENV_UBI_VOLUME_REDUND:
+
+         Define this to the name of another volume to store a second copy of
+         the environment in.  This will enable redundant environments in UBI.
+         It is assumed that both volumes are in the same MTD partition.
+
+       - CONFIG_UBI_SILENCE_MSG
+       - CONFIG_UBIFS_SILENCE_MSG
+
+         You will probably want to define these to avoid a really noisy system
+         when storing the env in UBI.
+

 - CONFIG_SYS_SPI_INIT_OFFSET
 
        Defines offset to the initial SPI buffer area in DPRAM. The
 - CONFIG_SYS_SPI_INIT_OFFSET
 
        Defines offset to the initial SPI buffer area in DPRAM. The


@@ -3819,9 +3871,13 @@ Low Level (hardware related) configuration options:
 - CONFIG_SYS_SRIOn_MEM_SIZE:
                Size of SRIO port 'n' memory region
 
 - CONFIG_SYS_SRIOn_MEM_SIZE:
                Size of SRIO port 'n' memory region
 

-- CONFIG_SYS_NDFC_16
-               Defined to tell the NDFC that the NAND chip is using a
-               16 bit bus.
+- CONFIG_SYS_NAND_BUSWIDTH_16BIT
+               Defined to tell the NAND controller that the NAND chip is using
+               a 16 bit bus.
+               Not all NAND drivers use this symbol.
+               Example of drivers that use it:
+               - drivers/mtd/nand/ndfc.c
+               - drivers/mtd/nand/mxc_nand.c

 
 - CONFIG_SYS_NDFC_EBC0_CFG
                Sets the EBC0_CFG register for the NDFC. If not defined
 
 - CONFIG_SYS_NDFC_EBC0_CFG
                Sets the EBC0_CFG register for the NDFC. If not defined