diff options
| -rw-r--r-- | arch/sparc64/kernel/tsb.S | 17 | ||||
| -rw-r--r-- | arch/sparc64/mm/init.c | 10 | ||||
| -rw-r--r-- | include/asm-sparc64/mmu.h | 2 |
3 files changed, 29 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/tsb.S b/arch/sparc64/kernel/tsb.S index fe266bad0a28..08405ed69288 100644 --- a/arch/sparc64/kernel/tsb.S +++ b/arch/sparc64/kernel/tsb.S @@ -126,6 +126,23 @@ winfix_trampoline: wrpr %g3, %tnpc ! Write it into TNPC done ! Trap return + /* Insert an entry into the TSB. + * + * %o0: TSB entry pointer + * %o1: tag + * %o2: pte + */ + .align 32 + .globl tsb_insert +tsb_insert: + rdpr %pstate, %o5 + wrpr %o5, PSTATE_IE, %pstate + TSB_LOCK_TAG(%o0, %g2, %g3) + TSB_WRITE(%o0, %o2, %o1) + wrpr %o5, %pstate + retl + nop + /* Reload MMU related context switch state at * schedule() time. * diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index a8119cb4fa32..1e8a5a33639d 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -277,6 +277,16 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t p mm_rss = get_mm_rss(mm); if (mm_rss >= mm->context.tsb_rss_limit) tsb_grow(mm, mm_rss, GFP_ATOMIC); + + if ((pte_val(pte) & _PAGE_ALL_SZ_BITS) == _PAGE_SZBITS) { + struct tsb *tsb; + unsigned long tag; + + tsb = &mm->context.tsb[(address >> PAGE_SHIFT) & + (mm->context.tsb_nentries - 1UL)]; + tag = (address >> 22UL) | CTX_HWBITS(mm->context) << 48UL; + tsb_insert(tsb, tag, pte_val(pte)); + } } void flush_dcache_page(struct page *page) diff --git a/include/asm-sparc64/mmu.h b/include/asm-sparc64/mmu.h index 76008ff6a90b..18f98edfbcda 100644 --- a/include/asm-sparc64/mmu.h +++ b/include/asm-sparc64/mmu.h @@ -97,6 +97,8 @@ struct tsb { unsigned long pte; } __attribute__((aligned(TSB_ENTRY_ALIGNMENT))); +extern void tsb_insert(struct tsb *ent, unsigned long tag, unsigned long pte); + typedef struct { unsigned long sparc64_ctx_val; struct tsb *tsb; |