diff options
| author | Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> | 2017-08-15 21:13:54 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2017-09-01 11:26:27 -0700 |
| commit | 9ed68785f7f2b001a6911d64fbd10cfc6fa49b27 (patch) | |
| tree | 57bf1ba37285d0a090eb52d24f15115f58d64e4f /arch/arc/Kconfig | |
| parent | bee91c3a3ce63daf64bb53ae60e6a2fb2961d3d7 (diff) | |
ARC: mm: Decouple RAM base address from kernel link address
[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]
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 7db85ab00c52..65b7549e17db 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -418,7 +418,7 @@ endif # ISA_ARCV2 endmenu # "ARC CPU Configuration" config LINUX_LINK_BASE - hex "Linux Link Address" + hex "Kernel link address" default "0x80000000" help ARC700 divides the 32 bit phy address space into two equal halves @@ -431,6 +431,14 @@ config LINUX_LINK_BASE If you don't know what the above means, leave this setting alone. This needs to match memory start address specified in Device Tree +config LINUX_RAM_BASE + hex "RAM base address" + default LINUX_LINK_BASE + help + By default Linux is linked at base of RAM. However in some special + cases (such as HSDK), Linux can't be linked at start of DDR, hence + this option. + config HIGHMEM bool "High Memory Support" select ARCH_DISCONTIGMEM_ENABLE |