On Friday 07 September 2012, Catalin Marinas wrote: > > The virtual memory layout is described in > Documentation/arm64/memory.txt. This patch adds the MMU definitions for > the 4KB and 64KB translation table configurations. The SECTION_SIZE is > 2MB with 4KB page and 512MB with 64KB page configuration. > > PHYS_OFFSET is calculated at run-time and stored in a variable (no > run-time code patching at this stage). > > On the current implementation, both user and kernel address spaces are > 512G (39-bit) each with a maximum of 256G for the RAM linear mapping. > Linux uses 3 levels of translation tables with the 4K page configuration > and 2 levels with the 64K configuration. Extending the memory space > beyond 39-bit with the 4K pages or 42-bit with 64K pages requires an > additional level of translation tables. > > The SPARSEMEM configuration is global to all AArch64 platforms and > allows for 1GB sections with SPARSEMEM_VMEMMAP enabled by default. > > Signed-off-by: Will Deacon <will.deacon@xxxxxxx> > Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx> > Acked-by: Tony Lindgren <tony@xxxxxxxxxxx> Acked-by: Arnd Bergmann <arnd@xxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
