diff options
| author | Steven J. Hill <Steven.Hill@imgtec.com> | 2015-02-26 18:16:38 -0600 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-03-19 17:39:49 +0100 |
| commit | c5b367835cfc7a8ef53b9670a409ffcc95194344 (patch) | |
| tree | 23a6be89021f93b09bb0f2340bc995c21bcab79b /arch/mips/include/asm/cpu.h | |
| parent | be0c37c985eddc46d0d67543898c086f60460e2e (diff) | |
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 <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9355/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/cpu.h')
| -rw-r--r-- | arch/mips/include/asm/cpu.h | 1 |
1 files changed, 1 insertions, 0 deletions
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 |