Hi,
The following patchset adds support for 64bit little endian boot
wrapper. It is based on original code from Andrew Tauferner.
The first patches provide fixes for 64bit support. I also changed
the prom code to make it converge with the prom_init kernel code.
They have a lot in common and they could probably be merged.
powerpc/boot: fix do_div for 64bit wrapper
powerpc/boot: use a common prom_args struct in oflib
powerpc/boot: use prom_arg_t in oflib
powerpc/boot: add byteswapping routines in oflib
powerpc/boot: add PROM_ERROR define in oflib
powerpc/boot: rework of_claim() to make it 64bit friendly
powerpc/boot: define typedef ihandle as u32
powerpc/boot: fix compile warning in 64bit
These are for little endian only:
powerpc/boot: define byteswapping routines for little endian
powerpc/boot: add 64bit and little endian support to addnote
powerpc/boot: add little endian support to elf utils
and these to support a 64bit boot wrapper in both endian
order :
powerpc/boot: define a routine to enter prom
powerpc/boot: modify entry point for 64bit
powerpc/boot: modify how we enter kernel on 64bit
powerpc/boot: add a global entry point for pseries
powerpc/boot: add support for 64bit big endian wrapper
powerpc/boot: add support for 64bit little endian wrapper
This final patch restores the previous configuration for
64bit big endian kernel, which is to compile in 32bit :
powerpc/boot: add PPC64_BOOT_WRAPPER config option
Here are some topics to discuss :
- to compile in 64bit, -m64 is added to the cross32 compiler.
- There are still some compile warnings due to 64bit, in addnote
and in the device tree library.
- the wrapper is compiled as a position independent executable.
This might not be an issue.
- is the addnote executable still in use ? It seems important for
RS6000.
This patchset is based on a 3.14-rc7 and was tested on qemu with
the -kernel option on little and big endian guests and with a custom
yaboot suporting LE. An another round of tests will be required when
a 64bit grub is available.
Best,
C.
Cédric Le Goater (18):
powerpc/boot: fix do_div for 64bit wrapper
powerpc/boot: use a common prom_args struct in oflib
powerpc/boot: use prom_arg_t in oflib
powerpc/boot: add byteswapping routines in oflib
powerpc/boot: add PROM_ERROR define in oflib
powerpc/boot: rework of_claim() to make it 64bit friendly
powerpc/boot: define typedef ihandle as u32
powerpc/boot: fix compile warning in 64bit
powerpc/boot: define byteswapping routines for little endian
powerpc/boot: add 64bit and little endian support to addnote
powerpc/boot: add little endian support to elf utils
powerpc/boot: define a routine to enter prom
powerpc/boot: modify entry point for 64bit
powerpc/boot: modify how we enter kernel on 64bit
powerpc/boot: add a global entry point for pseries
powerpc/boot: add support for 64bit big endian wrapper
powerpc/boot: add support for 64bit little endian wrapper
powerpc/boot: add PPC64_BOOT_WRAPPER config option
arch/powerpc/boot/Makefile | 18 +++-
arch/powerpc/boot/addnote.c | 128 +++++++++++++++--------
arch/powerpc/boot/crt0.S | 180 +++++++++++++++++++++++++++++++-
arch/powerpc/boot/elf_util.c | 4 +
arch/powerpc/boot/main.c | 4 +
arch/powerpc/boot/of.c | 4 +-
arch/powerpc/boot/of.h | 17 ++-
arch/powerpc/boot/ofconsole.c | 6 +-
arch/powerpc/boot/oflib.c | 94 +++++++++--------
arch/powerpc/boot/ppc_asm.h | 12 +++
arch/powerpc/boot/pseries-head.S | 8 ++
arch/powerpc/boot/stdio.c | 14 +++
arch/powerpc/boot/swab.h | 29 +++++
arch/powerpc/boot/wrapper | 17 ++-
arch/powerpc/boot/zImage.lds.S | 25 ++++-
arch/powerpc/platforms/Kconfig.cputype | 5 +
16 files changed, 465 insertions(+), 100 deletions(-)
create mode 100644 arch/powerpc/boot/pseries-head.S
create mode 100644 arch/powerpc/boot/swab.h
--
1.7.10.4
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
