diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-02-16 13:52:35 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2016-02-18 18:16:16 +0000 |
| commit | 324420bf91f60582bb481133db9547111768ef17 (patch) | |
| tree | 4cfcb31a6d57dfb88ed953f78ac17ba08baf2af1 /arch/arm64/include | |
| parent | 03336b1df9929e5d9c28fd9768948b6151cb046c (diff) | |
| download | op-kernel-dev-324420bf91f60582bb481133db9547111768ef17.zip op-kernel-dev-324420bf91f60582bb481133db9547111768ef17.tar.gz | |
arm64: add support for ioremap() block mappings
This wires up the existing generic huge-vmap feature, which allows
ioremap() to use PMD or PUD sized block mappings. It also adds support
to the unmap path for dealing with block mappings, which will allow us
to unmap the __init region using unmap_kernel_range() in a subsequent
patch.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 853953c..c65aad7 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -100,6 +100,12 @@ #define MT_S2_NORMAL 0xf #define MT_S2_DEVICE_nGnRE 0x1 +#ifdef CONFIG_ARM64_4K_PAGES +#define IOREMAP_MAX_ORDER (PUD_SHIFT) +#else +#define IOREMAP_MAX_ORDER (PMD_SHIFT) +#endif + #ifndef __ASSEMBLY__ extern phys_addr_t memstart_addr; |
