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authorWolfgang Denk <wd@denx.de>2010-10-07 21:51:12 +0200
committerWolfgang Denk <wd@denx.de>2010-10-18 22:07:10 +0200
commit14d0a02a168b36e87665b8d7f42fa3e88263d26d (patch)
tree576843229c10eb3e8836dc40a12d3f6f0c26a3ce /doc/README.arm-relocation
parentd24f2d321d8e78e990d100000d8efc4845c78b1c (diff)
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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-relocation12
1 files changed, 6 insertions, 6 deletions
diff --git a/doc/README.arm-relocation b/doc/README.arm-relocation
index e3ed60e..4ab3c7c 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.