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| author | Wolfgang Denk <wd@denx.de> | 2010-10-07 21:51:12 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-10-18 22:07:10 +0200 |
| commit | 14d0a02a168b36e87665b8d7f42fa3e88263d26d (patch) | |
| tree | 576843229c10eb3e8836dc40a12d3f6f0c26a3ce /doc/README.arm-relocation | |
| parent | d24f2d321d8e78e990d100000d8efc4845c78b1c (diff) | |
| download | u-boot-14d0a02a168b36e87665b8d7f42fa3e88263d26d.tar.gz u-boot-14d0a02a168b36e87665b8d7f42fa3e88263d26d.tar.xz u-boot-14d0a02a168b36e87665b8d7f42fa3e88263d26d.zip | |
Rename TEXT_BASE into CONFIG_SYS_TEXT_BASE
The change is currently needed to be able to remove the board
configuration scripting from the top level Makefile and replace it by
a simple, table driven script.
Moving this configuration setting into the "CONFIG_*" name space is
also desirable because it is needed if we ever should move forward to
a Kconfig driven configuration system.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'doc/README.arm-relocation')
| -rw-r--r-- | doc/README.arm-relocation | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/doc/README.arm-relocation b/doc/README.arm-relocation index e3ed60ecdc..4ab3c7c0bd 100644 --- a/doc/README.arm-relocation +++ b/doc/README.arm-relocation @@ -44,7 +44,7 @@ CONFIG_SYS_ARM_WITHOUT_RELOC defined!!! ------------------------------------------------------------------------------------- For boards which boot from nand_spl, it is possible to save a copy -if TEXT_BASE == relocation address! This prevents that uboot code +if CONFIG_SYS_TEXT_BASE == relocation address! This prevents that uboot code is copied again in relocate_code(). example for the tx25 board: @@ -61,7 +61,7 @@ e) there it copy u-boot to CONFIG_SYS_NAND_U_BOOT_DST and f) u-boot code steps through board_init_f() and calculates the relocation address and copy itself to it -If TEXT_BASE == relocation address, the copying of u-boot +If CONFIG_SYS_TEXT_BASE == relocation address, the copying of u-boot in f) could be saved. ------------------------------------------------------------------------------------- @@ -71,10 +71,10 @@ ToDo: - fill in bd_t infos (check) - adapt all boards -- maybe adapt TEXT_BASE (this must be checked from board maintainers) +- maybe adapt CONFIG_SYS_TEXT_BASE (this must be checked from board maintainers) This *must* be done for boards, which boot from NOR flash - on other boards if TEXT_BASE = relocation baseaddr, this saves + on other boards if CONFIG_SYS_TEXT_BASE = relocation baseaddr, this saves one copying from u-boot code. - new function dram_init_banksize() is actual board specific. Maybe @@ -88,13 +88,13 @@ Relocation with NAND_SPL (example for the tx25): and start with code execution on this address. - The First page contains u-boot code from u-boot:nand_spl/nand_boot_fsl_nfc.c - which inits the dram, cpu registers, reloacte itself to TEXT_BASE and loads + which inits the dram, cpu registers, reloacte itself to CONFIG_SYS_TEXT_BASE and loads the "real" u-boot to CONFIG_SYS_NAND_U_BOOT_DST and starts execution @CONFIG_SYS_NAND_U_BOOT_START - This u-boot does no ram int, nor cpu register setup. Just looks where it have to relocate and relocate itself to this address. - If relocate address = TEXT_BASE(not the same, as the TEXT_BASE + If relocate address = CONFIG_SYS_TEXT_BASE(not the same, as the TEXT_BASE from the nand_spl code), no need to copy, just go on with bss clear and jump to board_init_r. |