linux/arch/arm64/mm
Ard Biesheuvel 61bd93ce80 arm64: use fixmap region for permanent FDT mapping
Currently, the FDT blob needs to be in the same 512 MB region as
the kernel, so that it can be mapped into the kernel virtual memory
space very early on using a minimal set of statically allocated
translation tables.

Now that we have early fixmap support, we can relax this restriction,
by moving the permanent FDT mapping to the fixmap region instead.
This way, the FDT blob may be anywhere in memory.

This also moves the vetting of the FDT to mmu.c, since the early
init code in head.S does not handle mapping of the FDT anymore.
At the same time, fix up some comments in head.S that have gone stale.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-06-02 16:31:33 +01:00
..
cache.S arm64: kill flush_cache_all() 2015-05-19 15:27:42 +01:00
context.c arm64: Process management 2012-09-17 13:41:58 +01:00
copypage.c arm64: export __cpu_{clear,copy}_user_page functions 2014-07-08 17:30:51 +01:00
dma-mapping.c arm64: add missing PAGE_ALIGN() to __dma_free() 2015-04-29 17:39:39 +01:00
dump.c arm64: mm: Fix build error with CONFIG_SPARSEMEM_VMEMMAP disabled 2015-05-05 12:22:17 +01:00
extable.c arm64: MMU fault handling and page table management 2012-09-17 13:41:57 +01:00
fault.c arm64: move to ESR_ELx macros 2015-01-15 12:24:15 +00:00
flush.c arm64: kill flush_cache_all() 2015-05-19 15:27:42 +01:00
hugetlbpage.c mm/hugetlb: reduce arch dependent code around follow_huge_* 2015-02-11 17:06:01 -08:00
init.c arm64: use fixmap region for permanent FDT mapping 2015-06-02 16:31:33 +01:00
ioremap.c arm64: add ioremap physical address information 2015-01-23 15:29:06 +00:00
Makefile arm64: use fixmap region for permanent FDT mapping 2015-06-02 16:31:33 +01:00
mm.h arm64: add better page protections to arm64 2015-01-22 14:54:29 +00:00
mmap.c mm: expose arch_mmap_rnd when available 2015-04-14 16:49:05 -07:00
mmu.c arm64: use fixmap region for permanent FDT mapping 2015-06-02 16:31:33 +01:00
pageattr.c arm64: mm: unexport set_memory_ro and set_memory_rw 2015-03-19 10:43:56 +00:00
pgd.c arm64: pgalloc: consistently use PGALLOC_GFP 2014-11-20 12:05:18 +00:00
proc-macros.S arm64: mm: increase VA range of identity map 2015-03-23 11:35:29 +00:00
proc.S arm64: kill flush_cache_all() 2015-05-19 15:27:42 +01:00