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ac21b32104
add a kernel configuration to map the kernel's lowmem pages using PTE mappings, rather than the default behavior of 1MiB section mappings. on ARMv7 processors, to support allocating pages with DMA-coherent cache attributes, the cache attributes specified in the kernel's mapping must match cache attributes specified for other mappings; to ensure that this is the case, the kernel's attributes must be specified on a per-page basis. to avoid problems caused by the init_mm page table allocations exceeding the available initial memory, when this config is enabled lowmem is initially mapped using sections (matches current behavior), then remapped using pages after bootmem is initialized Change-Id: I8a6feba1d6806d007e17d9d4616525b0446c0fb1 Signed-off-by: Gary King <gking@nvidia.com>