smallsolar/u-boot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Rename TEXT_BASE into CONFIG_SYS_TEXT_BASE

Browse Source 
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>
This commit is contained in:
Wolfgang Denk
2010-10-07 21:51:12 +02:00
parent d24f2d321d
commit 14d0a02a16
797 changed files with 1493 additions and 1435 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
doc/README.arm-relocation
View File

@@ -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.