What is the best initialization sequence for MPC860 bootcode

[ze_dib]

MPC 860 boot code

Hi all,

i'm working on a MPC860 boot code software.

I'd like to know the correct initialisation sequence. The one I planned is

=> Set IMMR and MSR
=> Invalidate MMU and cache
=> Set SIU clocks et timers
=> Set memory mapping (load UPM and init Chip Select Bank)
=> Configure MMU
=> activate cache and MMU
=> sonfigure cpm et UART on SMC

Is it a better sequence, easier, more smart ?

Regards,

TOTO2001

 

[dainis]

Re: MPC 860 boot code

Look:
h**p://sourceforge.net/projects/u-boot
h**p://sourceforge.net/projects/ppcboot

 

[papyaki]

Hi,

See also the file MPC860COD16.ZIP on Motorola's site :

**broken link removed**

 

[ze_dib]

Hi,

I already red Motorola Apllication note on the boot code, but it only deine what is to configured, not the sequence of doing this.

In the ASM code, it seems strange to me that they configure UPM and memory mapping before setting up the systems clock and other power consideration, whiwh impact on UPM behaviour

Thank

Toto2001

 

[papyaki]

Hi

See also this old topic : **broken link removed**

You will find some interesting links.