On Tue, Sep 22, 2015 at 06:50:38PM +0200, Christophe Leroy wrote: > Memory: 124428K/131072K available (3748K kernel code, 188K rwdata, > 648K rodata, 508K init, 290K bss, 6644K reserved) > Kernel virtual memory layout: > * 0xfffdf000..0xfffff000 : fixmap > * 0xfde00000..0xfe000000 : consistent mem > * 0xfddf6000..0xfde00000 : early ioremap > * 0xc9000000..0xfddf6000 : vmalloc & ioremap > SLUB: HWalign=16, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 > > Mapping IMMR 1:1 is just wrong because it may overlap with another > area. On most mpc8xx boards it is OK because IMMR is set to > 0xff000000 but for instance on EP88xC board, IMMR is at 0xfa200000 > which overlaps with VM ioremap area > > This patch fixes the virtual address for remapping IMMR to 0xff000000, > regardless of the value of IMMR. > > The size of IMMR area is 256kbytes (CPM at offset 0, security engine > at offset 128) so 512kbytes is enough and allows to handle the EP88xC > case (which is not 8Mbytes but only 2Mbytes aligned) the same way. > > Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
Instead of hardcoding 0xff000000, can you use asm/fixmap.h to allocate a virtual address at compile time? -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
