diff options
| author | Gerald Van Baren <vanbaren@cideas.com> | 2007-03-31 12:23:51 -0400 |
|---|---|---|
| committer | Gerald Van Baren <vanbaren@cideas.com> | 2007-03-31 12:23:51 -0400 |
| commit | 213bf8c822de8eecaf69860684469cdaba2e9e6a (patch) | |
| tree | 178e19684d4024081de2caa27ec5f1806846672f /README | |
| parent | 781e09ee6e3e3e392ab362c1f0ef1068adc76e3e (diff) | |
Add a flattened device tree (fdt) command (2 of 2)
Modifications to the existing code to support the new fdt command.
Diffstat (limited to 'README')
| -rw-r--r-- | README | 33 |
1 files changed, 25 insertions, 8 deletions
@@ -164,6 +164,7 @@ Directory Hierarchy: - lib_mips Files generic to MIPS architecture - lib_nios Files generic to NIOS architecture - lib_ppc Files generic to PowerPC architecture +- libfdt Library files to support flattened device trees - net Networking code - post Power On Self Test - rtc Real Time Clock drivers @@ -430,12 +431,23 @@ The following options need to be configured: expect it to be in bytes, others in MB. Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. - CONFIG_OF_FLAT_TREE + CONFIG_OF_LIBFDT / CONFIG_OF_FLAT_TREE New kernel versions are expecting firmware settings to be - passed using flat open firmware trees. - The environment variable "disable_of", when set, disables this - functionality. + passed using flattened device trees (based on open firmware + concepts). + + CONFIG_OF_LIBFDT + * New libfdt-based support + * Adds the "fdt" command + * The bootm command does _not_ modify the fdt + + CONFIG_OF_FLAT_TREE + * Deprecated, see CONFIG_OF_LIBFDT + * Original ft_build.c-based support + * Automatically modifies the dft as part of the bootm command + * The environment variable "disable_of", when set, + disables this functionality. CONFIG_OF_FLAT_TREE_MAX_SIZE @@ -448,13 +460,16 @@ The following options need to be configured: CONFIG_OF_HAS_BD_T - The resulting flat device tree will have a copy of the bd_t. - Space should be pre-allocated in the dts for the bd_t. + * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command + * CONFIG_OF_FLAT_TREE - The resulting flat device tree + will have a copy of the bd_t. Space should be + pre-allocated in the dts for the bd_t. CONFIG_OF_HAS_UBOOT_ENV - The resulting flat device tree will have a copy of u-boot's - environment variables + * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command + * CONFIG_OF_FLAT_TREE - The resulting flat device tree + will have a copy of u-boot's environment variables CONFIG_OF_BOARD_SETUP @@ -721,6 +736,8 @@ The following options need to be configured: #define CONFIG_COMMANDS (CFG_CMD_ALL & ~CFG_CMD_NET) + Other Commands: + fdt (flattened device tree) command: CONFIG_OF_LIBFDT Note: Don't enable the "icache" and "dcache" commands (configuration option CFG_CMD_CACHE) unless you know |