flush_tlb_all performs a TLBIALL, which invalidates the entire TLB and
affects only the executing PE; translation table walks are now Inner
Shareable, so execute a TLBIALLIS (invalidate TLB Inner Shareable) instead.
TLBIALLIS is the equivalent of TLBIALL [1] when the multiprocessing
extensions are implemented, which are mandated by the virtualization
extensions.
Also add the necessary barriers to tlb_flush_all and a comment to
flush_dcache_addr stating what instruction is uses (unsurprisingly, it's
DCCIMVAC, which does a dcache clean and invalidate by VA to PoC).
[1] ARM DDI 0406C.d, section B3.10.6
Signed-off-by: Alexandru Elisei <alexandru.elisei@xxxxxxx>
---
lib/arm/asm/mmu.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/lib/arm/asm/mmu.h b/lib/arm/asm/mmu.h
index 2bf8965ed35e..122874b8aebe 100644
--- a/lib/arm/asm/mmu.h
+++ b/lib/arm/asm/mmu.h
@@ -26,8 +26,11 @@ static inline void local_flush_tlb_all(void)
static inline void flush_tlb_all(void)
{
- //TODO
- local_flush_tlb_all();
+ dsb(ishst);
+ /* TLBIALLIS */
+ asm volatile("mcr p15, 0, %0, c8, c3, 0" :: "r" (0));
+ dsb(ish);
+ isb();
}
static inline void flush_tlb_page(unsigned long vaddr)
@@ -41,6 +44,7 @@ static inline void flush_tlb_page(unsigned long vaddr)
static inline void flush_dcache_addr(unsigned long vaddr)
{
+ /* DCCIMVAC */
asm volatile("mcr p15, 0, %0, c7, c14, 1" :: "r" (vaddr));
}
--
2.7.4
