X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?p=kvmfornfv.git;a=blobdiff_plain;f=kernel%2Farch%2Farm64%2Finclude%2Fasm%2Fmemory.h;h=44a59c20e77358f98c7ad22c8ace5a1dd07bc7fd;hp=f800d45ea2265b2805668a0681bf9f300c7c1faf;hb=ec0a2ed6d8a5e555edef907895c041e285fdb495;hpb=342fa5dfa053559f47caad657132522496dcf1b3

diff --git a/kernel/arch/arm64/include/asm/memory.h b/kernel/arch/arm64/include/asm/memory.h
index f800d45ea..44a59c20e 100644
--- a/kernel/arch/arm64/include/asm/memory.h
+++ b/kernel/arch/arm64/include/asm/memory.h
@@ -113,6 +113,14 @@ extern phys_addr_t		memstart_addr;
 /* PHYS_OFFSET - the physical address of the start of memory. */
 #define PHYS_OFFSET		({ memstart_addr; })
 
+/*
+ * The maximum physical address that the linear direct mapping
+ * of system RAM can cover. (PAGE_OFFSET can be interpreted as
+ * a 2's complement signed quantity and negated to derive the
+ * maximum size of the linear mapping.)
+ */
+#define MAX_MEMBLOCK_ADDR	({ memstart_addr - PAGE_OFFSET - 1; })
+
 /*
  * PFNs are used to describe any physical page; this means
  * PFN 0 == physical address 0.