From c5b367835cfc7a8ef53b9670a409ffcc95194344 Mon Sep 17 00:00:00 2001 From: "Steven J. Hill" Date: Thu, 26 Feb 2015 18:16:38 -0600 Subject: MIPS: Add support for XPA. Add support for extended physical addressing (XPA) so that 32-bit platforms can access equal to or greater than 40 bits of physical addresses. NOTE: 1) XPA and EVA are not the same and cannot be used simultaneously. 2) If you configure your kernel for XPA, the PTEs and all address sizes become 64-bit. 3) Your platform MUST have working HIGHMEM support. Signed-off-by: Steven J. Hill Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9355/ Signed-off-by: Ralf Baechle --- arch/mips/include/asm/cpu.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/mips/include/asm/cpu.h') diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h index 15687234d70a..e492c740bb94 100644 --- a/arch/mips/include/asm/cpu.h +++ b/arch/mips/include/asm/cpu.h @@ -377,6 +377,7 @@ enum cpu_type_enum { #define MIPS_CPU_MAAR 0x400000000ull /* MAAR(I) registers are present */ #define MIPS_CPU_FRE 0x800000000ull /* FRE & UFE bits implemented */ #define MIPS_CPU_RW_LLB 0x1000000000ull /* LLADDR/LLB writes are allowed */ +#define MIPS_CPU_XPA 0x2000000000ull /* CPU supports Extended Physical Addressing */ /* * CPU ASE encodings -- cgit v1.2.3