lzma: fix printf warnings

[karo-tx-uboot.git] / README

diff --git a/README b/README
index e9d189108f70f2cf526395fd2db06e10e7ec10ab..110eac6f16131a7cc54c14db9f47f5acd9a63292 100644 (file)
--- 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
 # 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.
 
                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
 
 - Linux Kernel Interface:
                CONFIG_CLOCKS_IN_MHZ
 


@@ -638,6 +644,15 @@ The following options need to be configured:
                'Sane' compilers will generate smaller code if
                CONFIG_PRE_CON_BUF_SZ is a power of 2
 
                'Sane' compilers will generate smaller code if
                CONFIG_PRE_CON_BUF_SZ is a power of 2
 

+- 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.
 - Boot Delay:  CONFIG_BOOTDELAY - in seconds
                Delay before automatically booting the default image;
                set to -1 to disable autoboot.


@@ -783,6 +798,7 @@ The following options need to be configured:
                                          (requires CONFIG_CMD_I2C)
                CONFIG_CMD_SETGETDCR      Support for DCR Register access
                                          (4xx only)
                                          (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
                CONFIG_CMD_SHA1SUM        print sha1 memory digest
                                          (requires CONFIG_CMD_MEMORY)
                CONFIG_CMD_SOURCE         "source" command Support


@@ -1003,6 +1019,9 @@ The following options need to be configured:
                        If this defined, the driver is quiet.
                        The driver doen't show link status messages.
 
                        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.
 
                CONFIG_DRIVER_LAN91C96
                Support for SMSC's LAN91C96 chips.
 


@@ -1168,6 +1187,14 @@ The following options need to be configured:
                        for your device
                        - CONFIG_USBD_PRODUCTID 0xFFFF
 
                        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
 
 - MMC Support:
                The MMC controller on the Intel PXA is supported. To


@@ -1206,8 +1233,12 @@ The following options need to be configured:
 
 - FAT(File Allocation Table) filesystem write function support:
                CONFIG_FAT_WRITE
 
 - FAT(File Allocation Table) filesystem write function support:
                CONFIG_FAT_WRITE

-               Support for saving memory data as a file
-               in FAT formatted partition
+
+               Define this to enable support for saving memory data as a
+               file in FAT formatted partition.
+
+               This will also enable the command "fatwrite" enabling the
+               user to write files to FAT.

 
 - Keyboard Support:
                CONFIG_ISA_KEYBOARD
 
 - Keyboard Support:
                CONFIG_ISA_KEYBOARD


@@ -2154,6 +2185,25 @@ The following options need to be configured:
                allows to read/write in Dataflash via the standard
                commands cp, md...
 
                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
 
 - SystemACE Support:
                CONFIG_SYSTEMACE
 


@@ -2198,6 +2248,31 @@ The following options need to be configured:
                example, some LED's) on your board. At the moment,
                the following checkpoints are implemented:
 
                example, some LED's) on your board. At the moment,
                the following checkpoints are implemented:
 

+- Detailed boot stage timing
+               CONFIG_BOOTSTAGE
+               Define this option to get detailed timing of each stage
+               of the boot process.
+
+               CONFIG_BOOTSTAGE_USER_COUNT
+               This is the number of available user bootstage records.
+               Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...)
+               a new ID will be allocated from this stash. If you exceed
+               the limit, recording will stop.
+
+               CONFIG_BOOTSTAGE_REPORT
+               Define this to print a report before boot, similar to this:
+
+               Timer summary in microseconds:
+                      Mark    Elapsed  Stage
+                         0          0  reset
+                 3,575,678  3,575,678  board_init_f start
+                 3,575,695         17  arch_cpu_init A9
+                 3,575,777         82  arch_cpu_init done
+                 3,659,598     83,821  board_init_r start
+                 3,910,375    250,777  main_loop
+                29,916,167 26,005,792  bootm_start
+                30,361,327    445,160  start_kernel
+

 Legacy uImage format:
 
   Arg  Where                   When
 Legacy uImage format:
 
   Arg  Where                   When


@@ -3602,6 +3677,14 @@ 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.
 
   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
                  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