On Fri, Dec 14, 2007 at 10:48:58AM -0600, Kumar Gala wrote: > On Nov 22, 2007, at 9:46 AM, Dale Farnsworth wrote: > > > Add the ability to build a ppc_85xx kernel to run at a physical > > address of 32MB. > > > > Signed-off-by: Dale Farnsworth <[EMAIL PROTECTED]> > > --- > > arch/powerpc/Kconfig | 2 +- > > arch/powerpc/kernel/head_fsl_booke.S | 23 ++++++++++++++++++----- > > arch/powerpc/mm/fsl_booke_mmu.c | 6 +++--- > > 3 files changed, 22 insertions(+), 9 deletions(-) > > > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > > index 805b4d1..d405298 100644 > > --- a/arch/powerpc/Kconfig > > +++ b/arch/powerpc/Kconfig > > @@ -253,7 +253,7 @@ config KEXEC > > > > config CRASH_DUMP > > bool "Build a kdump crash kernel (EXPERIMENTAL)" > > - depends on PPC_MULTIPLATFORM && EXPERIMENTAL > > + depends on (PPC_MULTIPLATFORM || PPC_85xx) && EXPERIMENTAL > > help > > Build a kernel suitable for use as a kdump capture kernel. > > The kernel will be linked at a different address than normal, and > > diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/ > > kernel/head_fsl_booke.S > > index 4b98227..1c9685f 100644 > > --- a/arch/powerpc/kernel/head_fsl_booke.S > > +++ b/arch/powerpc/kernel/head_fsl_booke.S > > @@ -41,6 +41,12 @@ > > #include <asm/asm-offsets.h> > > #include "head_booke.h" > > > > +#ifdef CONFIG_CRASH_DUMP > > +#define INITIAL_BOOKE_PAGESZ (BOOKE_PAGESZ_64M) > > +#else > > +#define INITIAL_BOOKE_PAGESZ (BOOKE_PAGESZ_16M) > > +#endif > > I'm ok with bumping the first page to 64M in all cases.
OK, I'll make that change in the next rev. Thanks. <snip> > The rest looks good. Does this mean we can boot a e500 kernel at a > non-zero physical address? (can we run or is the non-zero phy just > for a short period of init time). Yes, with this series of patches, we can boot and run with a classic ppc or e500 kernel at 32MB physical (0xc2000000 virtual). Note that on classic, we still need memory at phys 0 for the exception vectors. On e500 IIRC, we don't use the vectors at phys 0, but we still write the trampoline vectors there. I just didn't bother making that conditional. I'll post an updated series soon, with hopes of getting it into 2.6.25 -Dale _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
