RE: [U-Boot-Users] Support for ZBT SRAM in MPC8560ADS?
Hi Scott,
Is there any plan for support of the ZBT SRAM found in MPC8560ADS ? Can someone at Freescale share the CS and clock setup?
We have our own 8540 board which has ZBT SRAM on the local bus very similar to the ADS board. The chip is MT55L512L18PF
Indeed, the chips on the ADS are 2xMT55L512L18P.
If you are interested I can send the code. Please be warned that we are still bringing our board up and I have several work a rounds for other problems so it is very ugly.
Don't worry, we're used to these stages :) Can you please send me (or to the list) your patch for the ZBT SRAM?
Also a question for folks at freescale, according to u-boot/doc/README.mpc85xxads, where in the memory mapping the ZBT is supposed to be mapped (2MiB)?
Thanks a lot,
On Thu, 2004-10-14 at 10:55, Fillod Stephane wrote:
Don't worry, we're used to these stages :) Can you please send me (or to the list) your patch for the ZBT SRAM?
Also a question for folks at freescale, according to u-boot/doc/README.mpc85xxads, where in the memory mapping the ZBT is supposed to be mapped (2MiB)?
Well, the local suggestion is 0xf840_0000 as part of the board register misc area at 0xf800_0000. Feel free to submit a patch with any localbus mods as needed. :-)
Note that in the currently released code, the LAW is setup with one gigundus 256M LAW, but the TLB is currently only mapping in 16K of the board register space.
Note that some compilers (GCC 2.95 and 3.3), or possibly some binutils variants(?) are known to have difficulty compiling (assembling) the TLB1_MAS2() and TLB1_MAS3() macros that span multiple lines in these init.S files. Feel free to rejoin the lines into longer ones for now. Official "feh".
jdl
Hello,
I have attached a file gdrx8540.c I have ripped out all of the unnecessary lines of code. You should be able to use the code.......... We map the SRAM to 0xFE000000
Good luck.
Scott
On Thursday 14 October 2004 09:59, Jon Loeliger wrote:
On Thu, 2004-10-14 at 10:55, Fillod Stephane wrote:
Don't worry, we're used to these stages :) Can you please send me (or to the list) your patch for the ZBT SRAM?
Also a question for folks at freescale, according to u-boot/doc/README.mpc85xxads, where in the memory mapping the ZBT is supposed to be mapped (2MiB)?
participants (3)
-
Fillod Stephane -
Jon Loeliger -
Scott Harper