Unable to boot Linux 2.4.24 on a custom board similar to 8260ADS

[Stan Partridge]

I have worked for sometime now with Motorola processors and other RTOS
however I am a newbie to Linux as an embedded OS.  I am attempting to port
ELDK 3.0 (Linux 2.4.24) to our board that somewhat resembles the 8260ADS.  I
found u-boot to easy to use and understand.

To get u-boot to work with my board I defined the pin outs in file:

  board/mpc8260/mpc8260ads.c

and I setup the physical memory base addresses in the file:

  include/configs/MPC8260ADS.h

My board's memory map is different from the standard 8260ADS board.  For
u-boot to work on my board I redefined the following found in the header
include/configs/MPC8260ADS.h:

#define CFG_FLASH_BASE		0xFC000000

#define CFG_DEFAULT_IMMR	0xFA200000
#define CFG_IMMR		0xFA200000
#define CFG_BCSR		0xFA100000
#define CFG_SDRAM_BASE		0x00000000
#define CFG_LSDRAM_BASE		0xFB000000

#define CFG_BR0_PRELIM		CFG_FLASH_BASE | 0x00000801 /* ID DiskOnChip
*/
#define CFG_OR0_PRELIM		0xFF800836
#define CFG_BR1_PRELIM		CFG_BCSR | 0x00000801       /* ID DiskOnChip
*/
#define CFG_OR1_PRELIM		0xFF800836


My question is how do I make the above corresponding changes above to Linux?

When I attempt to boot linux it appears to hang in the function

  __delay in entry.S


The contents of the LOG_BUF are as follows:

=> md 1c0094
 <6>Memory BAT mapping: BAT2=128Mb, BAT3=0Mb, residual: 0Mb.
 <4>Linux version 2.4.24-pre2 (stan at Imas1Linux) (gcc version 3.2.2 20030217
(Yel low Dog Linux 3.0 3.2.2-2a_1)) #1 Mon Apr 19 15:10:51  EDT 2004.
 <4>Attempting to use unrecognized host bridge ID 0x54545454..
 <4>On node 0 totalpages: 32768.
 <4>zone(0): 32768 pages..
 <4>zone(1): 0 pages..


In addition, I have attached my kernel .config file.


Any suggestions on how I should proceed?

Thanks in advance,
-Stan Partridge




Some details
------------------------
-Boot 1.0.2 (Apr 13 2004 - 13:50:02)

MPC8260 Reset Status: External Soft, External Hard

MPC8260 Clock Configuration
 - Bus-to-Core Mult 2x, VCO Div 2, 60x Bus Freq  50-150, Core Freq 100-300
 - dfbrg 1, corecnf 0x04, busdf 3, cpmdf 1, plldf 0, pllmf 1
 - vco_out  264000000, scc_clk   66000000, brg_clk   16500000
 - cpu_clk  132000000, cpm_clk  132000000, bus_clk   66000000

CPU:   MPC8260 (HiP3 Rev 01, Mask B.3 3K23A) at 132 MHz
Board: Motorola MPC8260ADS
I2C:   ready
DRAM:  128 MB
DOC:   DiskOnChip Millennium @ 0xFC000000, 32 MB
Net:   FCC3 ETHERNET

 <<ads8260.config>>



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