From 896a375623c3643a3f189353e7d4828c48a7fdf8 Mon Sep 17 00:00:00 2001 From: Grant Grundler Date: Fri, 21 Oct 2005 22:40:07 -0400 Subject: [PARISC] Make sure use of RFI conforms to PA 2.0 and 1.1 arch docs 2.6.12-rc4-pa3 : first pass at making sure use of RFI conforms to PA 2.0 arch pages F-4 and F-5, PA 1.1 Arch page 3-19 and 3-20. The discussion revolves around all the rules for clearing PSW Q-bit. The hard part is meeting all the rules for "relied upon translation". .align directive is used to guarantee the critical sequence ends more than 8 instructions (32 bytes) from the end of page. Signed-off-by: Grant Grundler Signed-off-by: Kyle McMartin --- include/asm-parisc/tlbflush.h | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'include/asm-parisc/tlbflush.h') diff --git a/include/asm-parisc/tlbflush.h b/include/asm-parisc/tlbflush.h index eb27b78930e..efbb2d8625b 100644 --- a/include/asm-parisc/tlbflush.h +++ b/include/asm-parisc/tlbflush.h @@ -64,29 +64,26 @@ static inline void flush_tlb_range(struct vm_area_struct *vma, { unsigned long npages; - npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT; - if (npages >= 512) /* XXX arbitrary, should be tuned */ + if (npages >= 512) /* 2MB of space: arbitrary, should be tuned */ flush_tlb_all(); else { mtsp(vma->vm_mm->context,1); + purge_tlb_start(); if (split_tlb) { - purge_tlb_start(); while (npages--) { pdtlb(start); pitlb(start); start += PAGE_SIZE; } - purge_tlb_end(); } else { - purge_tlb_start(); while (npages--) { pdtlb(start); start += PAGE_SIZE; } - purge_tlb_end(); } + purge_tlb_end(); } } -- cgit v1.2.3