diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2017-01-04 21:02:44 +0100 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2017-01-05 02:12:09 +0100 |
| commit | fa84d7310d19e0b77979019df82e357b1e8443e3 (patch) | |
| tree | a076e135e1563e19f9958f3400437cf7724f4148 /arch | |
| parent | Linux 4.10-rc1 (diff) | |
| download | linux-fa84d7310d19e0b77979019df82e357b1e8443e3.tar.xz linux-fa84d7310d19e0b77979019df82e357b1e8443e3.zip | |
ARC: mmu: clarify the MMUv3 programming model
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arc/mm/cache.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c index ec86ac0e3321..6d98e1d57a18 100644 --- a/arch/arc/mm/cache.c +++ b/arch/arc/mm/cache.c @@ -271,7 +271,11 @@ void __cache_line_loop_v2(phys_addr_t paddr, unsigned long vaddr, /* * For ARC700 MMUv3 I-cache and D-cache flushes - * Also reused for HS38 aliasing I-cache configuration + * - ARC700 programming model requires paddr and vaddr be passed in seperate + * AUX registers (*_IV*L and *_PTAG respectively) irrespective of whether the + * caches actually alias or not. + * - For HS38, only the aliasing I-cache configuration uses the PTAG reg + * (non aliasing I-cache version doesn't; while D-cache can't possibly alias) */ static inline void __cache_line_loop_v3(phys_addr_t paddr, unsigned long vaddr, |