diff options
Diffstat (limited to 'README')
| -rw-r--r-- | README | 50 |
1 files changed, 32 insertions, 18 deletions
@@ -1245,7 +1245,7 @@ The following options need to be configured: Modem Support: -------------- -[so far only for SMDK2400 board] +[so far only for SMDK2400 and TRAB boards] - Modem support endable: CONFIG_MODEM_SUPPORT @@ -1532,20 +1532,16 @@ has been relocated to RAM and a RAM copy of the environment has been 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: @@ -1605,16 +1601,16 @@ Low Level (hardware related) configuration options: - 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 @@ -1771,14 +1767,21 @@ to port U-Boot to your hardware platform. To do this, follow these 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.] @@ -2481,6 +2484,17 @@ Hit 'q': [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: ============= |