u-boot

mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-26 22:52:18 +00:00

History

Sebastien Carlier 6d8962e814 Switch from archive libraries to partial linking Before this commit, weak symbols were not overridden by non-weak symbols found in archive libraries when linking with recent versions of binutils. As stated in the System V ABI, "the link editor does not extract archive members to resolve undefined weak symbols". This commit changes all Makefiles to use partial linking (ld -r) instead of creating library archives, which forces all symbols to participate in linking, allowing non-weak symbols to override weak symbols as intended. This approach is also used by Linux, from which the gmake function cmd_link_o_target (defined in config.mk and used in all Makefiles) is inspired. The name of each former library archive is preserved except for extensions which change from ".a" to ".o". This commit updates references accordingly where needed, in particular in some linker scripts. This commit reveals board configurations that exclude some features but include source files that depend these disabled features in the build, resulting in undefined symbols. Known such cases include: - disabling CMD_NET but not CMD_NFS; - enabling CONFIG_OF_LIBFDT but not CONFIG_QE. Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>		2010-11-17 21:02:18 +01:00
..
early_init.S	Replace CONFIG_SYS_GBL_DATA_SIZE by auto-generated value	2010-10-26 21:05:30 +02:00
flash.c	rename CFG_ macros to CONFIG_SYS	2008-10-18 21:54:03 +02:00
hidden_dragon.c	rename CFG_ macros to CONFIG_SYS	2008-10-18 21:54:03 +02:00
Makefile	Switch from archive libraries to partial linking	2010-11-17 21:02:18 +01:00
README	* Patch by Yusdi Santoso, 22 Oct 2004:	2005-04-03 15:51:42 +00:00
speed.h	Big white-space cleanup.	2008-05-21 00:14:08 +02:00

README

U-Boot for Hidden Dragon board
------------------------------

Hidden Dragon is a MPC824x-based board by Motorola. For the most
part it is similar to Sandpoint8245 board. So unless otherwise
mentioned, the codes in this directory are adapted from ../sandpoint
directory.

Apparently there are very few of this board out there. Even Motorola
website does not have any info on it.

RAM:
  start = 0x0000 0000
  size	= 0x0200 0000 (32 MB)

Flash:
  BANK ONE:
    start = 0xFFE0 0000
    size  = 0x0020 0000 (2 MB)
    flash chip = 29LV160TE (1x16 Mbits or 2x8 Mbits)
    flash sectors = 16K, 2x8K, 32K, 31x64K

  BANK TWO:
    NONE

The processor interrupt vectors reside on the first 256 bytes
starting from address 0xFFF00000. The "reset vector" (first
instruction executed after reset) is located on 0xFFF0 0100.

U-Boot is configured to reside in flash starting at the address of
0xFFF00000. The environment space is located in flash separately from
U-Boot, at the second sector of the first flash bank, starting from
0xFFE04000 until 0xFFE06000 (8KB).

Network:
  - RTL8139 chip on the base board	  (SUPPORTED)
  - RTL8129 chip on the processor board	  (NOT SUPPORTED)

Serial:
  - Two NS16550 compatible UART on the processor board	(SUPPORTED)
  - One NS16550 compatible UART on the base board	(UNTESTED)

Misc:
  VIA686A PCI SuperIO peripheral controller
  - 2 USB ports		    (UNTESTED)
  - 2 PS2 ports		    (UNTESTED)
  - Parallel port	    (UNTESTED)
  - IDE & floppy interface  (UNTESTED)

  S3 Savage4 video card	    (UNTESTED)

TODO:
-----
- Support for the VIA686A based peripherals
- The RTL8139 driver frequently gives rx error.
- Support for RTL8129 network controller. (Why is the support removed from
  rtl8139.c driver?)

(C) Copyright 2004
Yusdi Santoso, Adaptec Inc., yusdi_santoso@adaptec.com