Commit cf4100d1 authored May 05, 2017 by Alexey Brodkin Committed by Vineet Gupta May 05, 2017

Revert "ARCv2: Allow enabling PAE40 w/o HIGHMEM"



This reverts commit 7cab91b8.

Now when we have a real hardware platform with PAE40 enabled
(here I mean axs103 with firmware v1.2) and 1 Gb of DDR mapped to
0x1_a000_0000-0x1_ffff_ffff we're really targeting memory above 4Gb
when PAE40 is enabled. This in its turn requires HIGHMEM to be enabled
otherwise user won't see any difference with enabling PAE in
kernel configuration as only lowmem will be used anyways.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

parent 868a6530

arch/arc/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -444,6 +444,7 @@ config ARC_HAS_PAE40
		bool "Support for the 40-bit Physical Address Extension"
		default n
		depends on ISA_ARCV2
		select HIGHMEM
		help
		Enable access to physical memory beyond 4G, only supported on
		ARC cores with 40 bit Physical Addressing support

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