"Jenkins, Clive" <clive.jenk...@xerox.com> wrote on 2012/06/12 17:48:15: > > > Is it possible to reserve some memory using OF rsvmap such that Linux > > will not touch this area at all? Think of is as warm start stash area > > were one could store data which should survive a reboot. > > Yes, I guess it should be possible, but you need to take care where you > place this block so it does not get overwritten during the boot process. > This depends on how your bootloader is set up to place images in memory, > decompress them etc. > > I don't know about OF, but in U-Boot use the function fdt_add_mem_rsv() > in file > http://git.denx.de/?p=u-boot.git;a=blob;f=lib/libfdt/fdt_rw.c > > // Reserve the memory location of the framebuffer + descriptor page. > if (fdt_add_mem_rsv(working_fdt, fbinfo->smem_start, > (fbinfo->smem_len + 0x1FFF) & 0xFFFFF000)) > printf("ERROR: could not reserve FB memory in device tree\n"); > > In my powerpc_e500v2 systems this block is located at 64MiB > (0x04000000).
Thanks, this was what I was looking at too. I plan to use u-boots PRAM feature and reserve memory at the end of RAM. Jocke _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
