On Thu, 2015-10-08 at 14:34 +0200, Christophe Leroy wrote: > Le 29/09/2015 01:39, Scott Wood a écrit : > > 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? > > > > > Yes good idea, but in asm/fixmap.h FIX_XXXX constants are defined as enums. > Is there a way to use them in head_8xx.S ?
asm-offsets -Scott -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
