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ARC: mm: Decouple RAM base address from kernel link address

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[Needed for HSDK]

Currently the first page of system (hence RAM base) is assumed to be
@ CONFIG_LINUX_LINK_BASE, where kernel itself is linked.

However is case of HSDK platform, for reasons explained in that patch,
this is not true. kernel needs to be linked @ 0x9000_0000 while DDR
is still wired at 0x8000_0000. To properly account for this 256M of RAM,
we need to introduce a new option and base page frame accountiing off of
it.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: renamed  CONFIG_KERNEL_RAM_BASE_ADDRESS => CONFIG_LINUX_RAM_BASE
       : simplified changelog]
This commit is contained in:
Eugeniy Paltsev
2017-08-15 21:13:54 +03:00
committed by Vineet Gupta
parent bee91c3a3c
commit 9ed68785f7
8 changed files with 18 additions and 10 deletions
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2
arch/arc/boot/dts/nsim_hs.dts
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@@ -18,7 +18,7 @@
memory {
device_type = "memory";
/* CONFIG_LINUX_LINK_BASE needs to match low mem start */
/* CONFIG_LINUX_RAM_BASE needs to match low mem start */
reg = <0x0 0x80000000 0x0 0x20000000 /* 512 MB low mem */
0x1 0x00000000 0x0 0x40000000>; /* 1 GB highmem */
};