korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-05 10:04:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

powerpc/mm: Add mask of possible MMU features

Browse Source 
Follow the example of the cpu feature code, and add a mask of possible
MMU features, MMU_FTRS_POSSIBLE.

This is used in mmu_has_feature(), which allows the possible mask to act
as a shortcut for any features that are not possible, but still allows
the feature bit itself to be defined.

We will use this in the next commit to allow MMU_FTR_RADIX checks to be
elided when MMU_FTR_RADIX is not possible.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2016-05-11 15:30:47 +10:00
parent 1a472c9dba
commit 773edeadf6
1 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/powerpc/include/asm/mmu.h
View File

@ -110,9 +110,21 @@
DECLARE_PER_CPU(int, next_tlbcam_idx);
#endif
enum {
MMU_FTRS_POSSIBLE = MMU_FTR_HPTE_TABLE | MMU_FTR_TYPE_8xx |
MMU_FTR_TYPE_40x | MMU_FTR_TYPE_44x | MMU_FTR_TYPE_FSL_E |
MMU_FTR_TYPE_47x | MMU_FTR_USE_HIGH_BATS | MMU_FTR_BIG_PHYS |
MMU_FTR_USE_TLBIVAX_BCAST | MMU_FTR_USE_TLBILX |
MMU_FTR_LOCK_BCAST_INVAL | MMU_FTR_NEED_DTLB_SW_LRU |
MMU_FTR_USE_TLBRSRV | MMU_FTR_USE_PAIRED_MAS |
MMU_FTR_NO_SLBIE_B | MMU_FTR_16M_PAGE | MMU_FTR_TLBIEL |
MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_CI_LARGE_PAGE |
MMU_FTR_1T_SEGMENT,
};
static inline int mmu_has_feature(unsigned long feature)
{
return (cur_cpu_spec->mmu_features & feature);
return (MMU_FTRS_POSSIBLE & cur_cpu_spec->mmu_features & feature);
}
static inline void mmu_clear_feature(unsigned long feature)