Re: [linuxsh-dev] How to make entries in config.mk,config.h,and sh37727.mem

[Jeremy S. <js...@mv...>]

manoj ks wrote:

> I have gone through the site
> http://linuxsh.sourceforge.net/docs/gdb-p.ph3
> but i am not clear on my above doubts.

> Could any one pls help on how should i modify the
> config.mk and config.h and sh37727.mem files.

Not sure what to add to the above document.  If you start with the
machine/config.mk-sesh3 as an example:

CONFIG_LITTLE_ENDIAN=y
CONFIG_CPU_SH3=y
CONFIG_SESH3=y

You keep or drop the first line (ENDIAN) depending on your HW; keep the
second (it is an SH3); replace the third with something specifying your
target (e.g. CONFIG_BOARDNAME=y).  Similarly with the .h file.

Then you modify the Makefile so your configuration references the
BSC initialization file for your board:

+ifdef CONFIG_BOARDNAME
+MACHINE_DEPENDS := init-boardname.o
+endif

You have to generate init-boardname.S yourself based on your specific HW
and the BSC for the 7727.  (The 7727 BSC is similar but not identical to
the 7709A BSC.)  While some existing files (e.g. init-cqsh3.S) might serve
as a guide the actual values that go into the BSC registers depend on your
specific HW... any low-level SW or FW that configures the BSC must be
tailored for the HW, not just the CPU.

You might also need to use CONFIG_BOARDNAME in sh-sci.c to determine the
correct  value for BPS_SETTING_VALUE (baud rate divisor) based on the
clock speed of your board.  And of course you need to set CONFIG_SCIF or
CONFIG_SCI in the .h file.

> My memory maps are
> Flash ROM- BANK0(0000 0000 to 0007 FFFF)
>            BANK1(0008 0000 to 000F FFFF)
>            .............................
>            .............................
>            BANK7(0038 0000 to 003E FFFF)
>
> SDRAM     - BANK0 to BANK 3(0C00 0000 to 0C3F FFFF).
>
> For sh37727.mem,could you pls specify how i should
> fill the 'XXX'
>
> MEMORY
>
> {
>         ROM (rx):      ORIGIN = XXX, LENGTH =XXX
>         RAM (rw):      ORIGIN =XXX , LENGTH =XXX
>         STACK (rw):    ORIGIN = XXX, LENGTH = XXXX
>
> }

Your first posting says you want IPL to be in "BANK1", so you probably
want:

  ROM(rx): ORIGIN=0x80080000, LENGTH=16384

The leading 8 just puts you in P1 space (direct-mapped) rather than P0;
the length just needs to be big enough to hold the text and read-only
space (that's what sh-stub.lds puts into ROM).  If you add stuff (e.g. to
initialize other devices) you may need to expand it; you could just make
it the whole bank (LENGTH=512k) if it makes you more comfortable.

The other two you can just safely copy from others:

  RAM(rw): ORIGIN=0x8c000000, LENGTH=2560
  STACK(rw): ORIGIN=0x8c000a00, LENGTH=1536

Hope some of that's at least a little bit helpful...

--Jeremy Siegel