This patch series takes the common bits from the x86 early ioremap implementation and creates a generic library which may be used by other architectures. The early ioremap interfaces are intended for situations where boot code needs to make temporary virtual mappings before the normal ioremap interfaces are available. Typically, this means before paging_init() has run.
These patches are layered on top of generic fixmap patches which have been discussed here: http://lkml.org/lkml/2013/11/25/474 These patches (and undelying fixmap patches) may be found at: git://github.com/mosalter/linux.git (early-ioremap branch) Mark Salter (4): Create generic early_ioremap() support x86: use generic early_ioremap arm: add early_ioremap support arm64: add early_ioremap support Documentation/arm64/memory.txt | 4 +- arch/arm/Kconfig | 11 ++ arch/arm/include/asm/Kbuild | 1 + arch/arm/include/asm/fixmap.h | 18 +++ arch/arm/include/asm/io.h | 1 + arch/arm/kernel/setup.c | 3 + arch/arm/mm/Makefile | 1 + arch/arm/mm/early_ioremap.c | 93 ++++++++++++++ arch/arm/mm/mmu.c | 2 + arch/arm64/Kconfig | 1 + arch/arm64/include/asm/Kbuild | 1 + arch/arm64/include/asm/fixmap.h | 68 ++++++++++ arch/arm64/include/asm/io.h | 1 + arch/arm64/include/asm/memory.h | 1 + arch/arm64/kernel/early_printk.c | 8 +- arch/arm64/kernel/head.S | 9 +- arch/arm64/kernel/setup.c | 2 + arch/arm64/mm/ioremap.c | 77 ++++++++++++ arch/arm64/mm/mmu.c | 41 ------ arch/x86/Kconfig | 1 + arch/x86/include/asm/Kbuild | 1 + arch/x86/include/asm/fixmap.h | 6 + arch/x86/include/asm/io.h | 14 +-- arch/x86/mm/ioremap.c | 224 +-------------------------------- arch/x86/mm/pgtable_32.c | 2 +- include/asm-generic/early_ioremap.h | 40 ++++++ lib/Kconfig | 3 + lib/Makefile | 1 + lib/early_ioremap.c | 243 ++++++++++++++++++++++++++++++++++++ 29 files changed, 592 insertions(+), 286 deletions(-) create mode 100644 arch/arm/mm/early_ioremap.c create mode 100644 arch/arm64/include/asm/fixmap.h create mode 100644 include/asm-generic/early_ioremap.h create mode 100644 lib/early_ioremap.c -- 1.8.3.1 -- 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/
