Dear Graeme Russ, > Hi Marek, > > On 08/15/2012 12:00 AM, Marek Vasut wrote: > > Dear Graeme Russ, > > > >> Hi Marek, > >> > >> On Tue, Aug 14, 2012 at 10:37 PM, Marek Vasut <ma...@denx.de> wrote: > >>> Dear Tomas Hlavacek, > >>> > >>>> Hello Marek, > >>>> > >>>> On Sun, Aug 12, 2012 at 1:16 AM, Marek Vasut <ma...@denx.de> wrote: > >>>>> So ... we should aim for firing up the real mallocator as soon as > >>>>> possible and maybe implement discontigmem (sparsemem) into it, so we > >>>>> don't have to bother with relocating pointers maybe? > >>>>> > >>>>> The only problem I see is platforms where the memory disappears. > >>>> > >>>> I doubt that on ARM for instance you can set off real mallocator that > >>>> early without completely rewriting it. > >>> > >>> Esp. on ARM, I won't see much of a problem. You usually have some small > >>> SRAM where such allocator could run. > >>> > >>>> The idea of having one complex > >>>> mallocator working in the same manner in board_init_f and board_init_r > >>>> stages, being able to operate on all platforms using their nifty > >>>> memory-management/model features > >>> > >>> Do you need them? You usually need only a piece of RW memory. > >>> > >>>> and being seamless to users is really > >>>> tempting. But do we need/want to introduce such deep rewrites? > >>> > >>> Deep rewrites? You'd only need to implement sparsemem into it, which > >>> might be list of RW memory areas instead of one memory area. > >> > >> OK, stop right there (please) - This gets into a highly architecturally > >> specific implementations of malloc. Let's not go there OK :) > > > > Not really, today you give the mallocator one slab of memory on which it > > operates ... making it so it'd operate on a list of such slabs shouldn't > > be _that_ hard. > > When you start throwing around "discontigmem", "sparsemem" and "nifty > memory-management/model features" you are talking architecture specifics
In uboot, not so much ... in uboot it'd be just a matter of making one memory are that's currently available to malloc() into list of memory areas and that's all. Not specific at all Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
