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Date: Mon, 6 Jan 2014 21:35:15 -0500
From: Mark Salter <msalter@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-arch@...r.kernel.org, patches@...aro.org, linux-mm@...ck.org,
Mark Salter <msalter@...hat.com>, x86@...nel.org,
linux-arm-kernel@...ts.infradead.org,
Andrew Morton <akpm@...ux-foundation.org>,
Arnd Bergmann <arnd@...db.de>, Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Russell King <linux@....linux.org.uk>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>
Subject: [PATCH v2 0/5] generic early_ioremap support
This patch series takes the common bits from the x86 early ioremap
implementation and creates a generic implementation 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
were discussed here (and are in the akpm tree):
http://lkml.org/lkml/2013/11/25/474
This is version 2 of the patch series. These patches (and underlying
fixmap patches) may be found at:
git://github.com/mosalter/linux.git (early-ioremap-v2 branch)
Changes from version 1:
* Moved the generic code into linux/mm instead of linux/lib
* Have early_memremap() return normal pointer instead of __iomem
This is in response to sparse warning cleanups being made in
an unrelated patch series:
https://lkml.org/lkml/2013/12/22/69
* Added arm64 patch to call init_mem_pgprot() earlier so that
the pgprot macros are valid in time for early_ioremap use
* Added validity checking for early_ioremap pgd, pud, and pmd
in arm64
Mark Salter (5):
mm: create generic early_ioremap() support
x86: use generic early_ioremap
arm: add early_ioremap support
arm64: initialize pgprot info earlier in boot
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 | 2 +-
arch/arm64/include/asm/mmu.h | 1 +
arch/arm64/kernel/early_printk.c | 8 +-
arch/arm64/kernel/head.S | 9 +-
arch/arm64/kernel/setup.c | 4 +
arch/arm64/mm/ioremap.c | 85 ++++++++++++
arch/arm64/mm/mmu.c | 44 +------
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 | 41 ++++++
mm/Kconfig | 3 +
mm/Makefile | 1 +
mm/early_ioremap.c | 249 ++++++++++++++++++++++++++++++++++++
30 files changed, 611 insertions(+), 289 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 mm/early_ioremap.c
--
1.8.3.1
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