uClinux for Motorola MC68360

Introduction:

This package supports the Motorola MC68360 QUICC (Quad Integrated Communications Controller) under uClinux. It is a snapshot of a work in progress.

kernel:

The kernel source tarball is based on uClinux2.0.38.1pre7. The 68ez328 was used as a model to get the CPU running. I decided on back-porting Dan Malek's quicc support for mpc860, as it provides a relatively clean, unified approach to the SxC ports. The uart driver supports SMC1-2, SCC2-4. SMC2 is the only thing I've had a chance to verify so far.

romfs.img, the root filesystem image, is now appended to the kernel rather than being compiled into drivers/blkmem.c (the old method).

target:

The first platform supported by this¹ package is Lineo's uCquicc, a board with a Motorola 68360, serial console, ethernet, IDE, and three highly configurable sync/async serial ports.

tools:

I've been using the tools from the May uClinux CD, plus gdb 4.18 for bdm with patches from here

links:

• MC68360 at uclinux.org
• Tools and patches at uclinux.org
• GNU tools at ftp.gnu.org
• BDM support for gdb
• MC68360 information at Motorola
• MC68360 Demo Code at Motorola
• MC68360 Product Summary at Motorola

to do:

• uCbootloader hooks for gethwaddr, program etc.
• move system timer from cpm timer1 to PIT
• more menuconfig for SMC / SCC options
• verify ethernet operation under load
• implement HDLC drivers for SCC and possibly SMC, based on the generic HDLC interface in linux 2.4
• hdlc drivers:
  • drivers/net/hdlcdrv.c for system level interface, plus quicc/uart.c for hdlc?
  • drivers/char/n_hdlc.c for system level interface, plus quicc/sync.c for hdlc?
    n_hdlc.c is from linux-2.4
• Roll in board support for the other 68360 ports that preceded this one

done:

• UART support back-ported from Dan Malek's mpc8xx support in linux 2.4.0-pre11
• Ethernet support ditto
• romfs now appended to kernel, and not compiled into blkmem.c
  romfs.ld fragment auto-generated from size of $(TOPDIR)/romfs.img

¹other 68360 uClinux work:

• I know that others have worked on 68360/uClinux. If you would like your work mentioned here, please contact me.