Modem Support:
--------------
-[so far only for SMDK2400 board]
+[so far only for SMDK2400 and TRAB boards]
- Modem support endable:
CONFIG_MODEM_SUPPORT
created; also, when using EEPROM you will have to use getenv_r()
until then to read environment variables.
-The environment is now protected by a CRC32 checksum. Before the
-monitor is relocated into RAM, as a result of a bad CRC you will be
-working with the compiled-in default environment - *silently*!!!
-[This is necessary, because the first environment variable we need is
-the "baudrate" setting for the console - if we have a bad CRC, we
-don't have any device yet where we could complain.]
+The environment is protected by a CRC32 checksum. Before the monitor
+is relocated into RAM, as a result of a bad CRC you will be working
+with the compiled-in default environment - *silently*!!! [This is
+necessary, because the first environment variable we need is the
+"baudrate" setting for the console - if we have a bad CRC, we don't
+have any device yet where we could complain.]
Note: once the monitor has been relocated, then it will complain if
the default environment is used; a new CRC is computed as soon as you
-use the "setenv" command to modify / delete / add any environment
-variable [even when you try to delete a non-existing variable!].
-
-Note2: you must edit your u-boot.lds file to reflect this
-configuration.
+use the "saveenv" command to store a valid environment.
Low Level (hardware related) configuration options:
+---------------------------------------------------
- CFG_CACHELINE_SIZE:
Cache Line Size of the CPU.
- MPC824X: data cache
- PPC4xx: data cache
-- CFG_INIT_DATA_OFFSET:
+- CFG_GBL_DATA_OFFSET:
Offset of the initial data structure in the memory
area defined by CFG_INIT_RAM_ADDR. Usually
- CFG_INIT_DATA_OFFSET is chosen such that the initial
+ CFG_GBL_DATA_OFFSET is chosen such that the initial
data is located at the end of the available space
(sometimes written as (CFG_INIT_RAM_END -
CFG_INIT_DATA_SIZE), and the initial stack is just
below that area (growing from (CFG_INIT_RAM_ADDR +
- CFG_INIT_DATA_OFFSET) downward.
+ CFG_GBL_DATA_OFFSET) downward.
Note:
On the MPC824X (or other systems that use the data
steps:
1. Add a new configuration option for your board to the toplevel
- "Makefile", using the existing entries as examples.
+ "Makefile" and to the "MAKEALL" script, using the existing
+ entries as examples. Note that here and at many other places
+ boards and other names are listed alphabetically sorted. Please
+ keep this order.
2. Create a new directory to hold your board specific code. Add any
- files you need.
+ files you need. In your board directory, you will need at least
+ the "Makefile", a "<board>.c", "flash.c" and "u-boot.lds".
+3. Create a new configuration file "include/configs/<board>.h" for
+ your board
3. If you're porting U-Boot to a new CPU, then also create a new
directory to hold your CPU specific code. Add any files you need.
-4. Run "make config_name" with your new name.
+4. Run "make <board>_config" with your new name.
5. Type "make", and you should get a working "u-boot.srec" file
to be installed on your target system.
+6. Debug and solve any problems that might arise.
[Of course, this last step is much harder than it sounds.]
ipaddr - IP address; needed for tftpboot command
loadaddr - Default load address for commands like "bootp",
- "rarpboot", "tftpboot" or "diskboot"
+ "rarpboot", "tftpboot", "loadb" or "diskboot"
loads_echo - see CONFIG_LOADS_ECHO
[q, b, e, ?] ## Application terminated, rc = 0x0
+
+Minicom warning:
+================
+
+Over time, many people have reported problems when trying to used the
+"minicom" terminal emulation program for serial download. I (wd)
+consider minicom to be broken, and recommend not to use it. Under
+Unix, I recommend to use CKermit for general purpose use (and
+especially for kermit binary protocol download ("loadb" command), and
+use "cu" for S-Record download ("loads" command).
+
NetBSD Notes:
=============
projects / platform / kernel / u-boot.git / blobdiff