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authorEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>2017-08-15 21:13:54 +0300
committerVineet Gupta <vgupta@synopsys.com>2017-09-01 21:26:27 +0300
commit9ed68785f7f2b001a6911d64fbd10cfc6fa49b27 (patch)
tree57bf1ba37285d0a090eb52d24f15115f58d64e4f /arch/arc/include
parentbee91c3a3ce63daf64bb53ae60e6a2fb2961d3d7 (diff)
downloadlinux-9ed68785f7f2b001a6911d64fbd10cfc6fa49b27.tar.xz
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/include')
-rw-r--r--arch/arc/include/asm/page.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h
index 296c3426a6ad..109baa06831c 100644
--- a/arch/arc/include/asm/page.h
+++ b/arch/arc/include/asm/page.h
@@ -85,7 +85,7 @@ typedef pte_t * pgtable_t;
*/
#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
-#define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_LINK_BASE)
+#define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE)
#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)