From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 include/asm-parisc/tlbflush.h | 95 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 include/asm-parisc/tlbflush.h

(limited to 'include/asm-parisc/tlbflush.h')

diff --git a/include/asm-parisc/tlbflush.h b/include/asm-parisc/tlbflush.h
new file mode 100644
index 000000000000..eb27b78930e8
--- /dev/null
+++ b/include/asm-parisc/tlbflush.h
@@ -0,0 +1,95 @@
+#ifndef _PARISC_TLBFLUSH_H
+#define _PARISC_TLBFLUSH_H
+
+/* TLB flushing routines.... */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <asm/mmu_context.h>
+
+extern void flush_tlb_all(void);
+
+/*
+ * flush_tlb_mm()
+ *
+ * XXX This code is NOT valid for HP-UX compatibility processes,
+ * (although it will probably work 99% of the time). HP-UX
+ * processes are free to play with the space id's and save them
+ * over long periods of time, etc. so we have to preserve the
+ * space and just flush the entire tlb. We need to check the
+ * personality in order to do that, but the personality is not
+ * currently being set correctly.
+ *
+ * Of course, Linux processes could do the same thing, but
+ * we don't support that (and the compilers, dynamic linker,
+ * etc. do not do that).
+ */
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+{
+	BUG_ON(mm == &init_mm); /* Should never happen */
+
+#ifdef CONFIG_SMP
+	flush_tlb_all();
+#else
+	if (mm) {
+		if (mm->context != 0)
+			free_sid(mm->context);
+		mm->context = alloc_sid();
+		if (mm == current->active_mm)
+			load_context(mm->context);
+	}
+#endif
+}
+
+extern __inline__ void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end)
+{
+}
+ 
+static inline void flush_tlb_page(struct vm_area_struct *vma,
+	unsigned long addr)
+{
+	/* For one page, it's not worth testing the split_tlb variable */
+
+	mb();
+	mtsp(vma->vm_mm->context,1);
+	purge_tlb_start();
+	pdtlb(addr);
+	pitlb(addr);
+	purge_tlb_end();
+}
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+	unsigned long start, unsigned long end)
+{
+	unsigned long npages;
+
+	
+	npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
+	if (npages >= 512)  /* XXX arbitrary, should be tuned */
+		flush_tlb_all();
+	else {
+
+		mtsp(vma->vm_mm->context,1);
+		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();
+		}
+	}
+}
+
+#define flush_tlb_kernel_range(start, end) flush_tlb_all()
+
+#endif
-- 
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