This patchseries introduces a suitable way for loading ELF linux kernel images on MIPS. You can load normal vmlinux images or compressed self-extractable vmlinuz images. The patchseries and additional patch with pre-compiled demo vmlinux image for MIPS Malta can be obtained here: https://github.com/frantony/barebox/tree/20161205.malta-bootm-vmlinux Please see this commit message https://github.com/frantony/barebox/commit/23b24122a4bd1d59266ae585364c792dc9140ecb for instructions. The code for actual ELF loading and relocation is imported from kexec-tools (git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools) and linux kernel (http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git). There is no common practice on passing cmdline to the linux kernel on MIPS machines. We have to realize it's own cmdline passing routine for every MIPS machine supported by barebox. The 'MIPS: malta: enable kexec' patch demonstrates how to do it for MIPS Malta. To separate common ELF handling routines and machine-specific cmdline handling the 'reboot()' call is introduced. The common code checks and loads ELF-file, the MIPS-specific code arrange ELF segments in the appropriate memory places and tunes relocator; next reboot() is called and machine-specific code works on cmdline passing. The 'import initial kexec stuff' contains some codes stealed from kexec-tools as-is. These codes have some checkpatch.pl issues. Antony Pavlov (7): MIPS: add virt_to_phys() and phys_to_virt() resource: add create_resource() helper function import initial kexec stuff filetype: add ELF type bootm: add kexec ELF support MIPS: add kexec ELF loading support MIPS: malta: enable kexec Peter Mamonov (1): MIPS: c-r4k: add support for secondary cache Changes since RFC v1 (http://lists.infradead.org/pipermail/barebox/2014-April/018651.html): * add 64 bit ELF support by Peter Mamonov; * update relocate_new_kernel arguments passing mechanism; * test with linux-4.9-rc8. TODOs: * add DT and initrd passing support. arch/mips/Kconfig | 1 + arch/mips/include/asm/cacheops.h | 10 + arch/mips/include/asm/elf.h | 8 +- arch/mips/include/asm/io.h | 35 ++ arch/mips/lib/Makefile | 3 + arch/mips/lib/c-r4k.c | 19 +- arch/mips/lib/kexec-mips.c | 171 +++++++++ arch/mips/lib/relocate_kernel.S | 97 +++++ arch/mips/mach-malta/Makefile | 1 + arch/mips/mach-malta/reboot.c | 104 ++++++ commands/Kconfig | 7 + common/Kconfig | 3 + common/filetype.c | 5 + common/resource.c | 15 + include/filetype.h | 1 + include/linux/ioport.h | 2 + include/linux/reboot.h | 14 + lib/Makefile | 1 + lib/kexec/Makefile | 4 + lib/kexec/kexec-bootm-elf.c | 37 ++ lib/kexec/kexec-elf-exec.c | 82 ++++ lib/kexec/kexec-elf.c | 783 +++++++++++++++++++++++++++++++++++++++ lib/kexec/kexec-elf.h | 86 +++++ lib/kexec/kexec.c | 151 ++++++++ lib/kexec/kexec.h | 89 +++++ 25 files changed, 1722 insertions(+), 7 deletions(-) create mode 100644 arch/mips/lib/kexec-mips.c create mode 100644 arch/mips/lib/relocate_kernel.S create mode 100644 arch/mips/mach-malta/reboot.c create mode 100644 include/linux/reboot.h create mode 100644 lib/kexec/Makefile create mode 100644 lib/kexec/kexec-bootm-elf.c create mode 100644 lib/kexec/kexec-elf-exec.c create mode 100644 lib/kexec/kexec-elf.c create mode 100644 lib/kexec/kexec-elf.h create mode 100644 lib/kexec/kexec.c create mode 100644 lib/kexec/kexec.h Cc: Peter Mamonov <pmamonov@xxxxxxxxx> -- 2.10.2 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
