1 files changed, 85 insertions, 0 deletions

diff --git a/arch/um/kernel/skas/tlb.c b/arch/um/kernel/skas/tlb.c
new file mode 100644
index 000000000000..b8c5e71763d1
--- /dev/null
+++ b/arch/um/kernel/skas/tlb.c
@@ -0,0 +1,85 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright 2003 PathScale, Inc.
+ * Licensed under the GPL
+ */
+
+#include "linux/stddef.h"
+#include "linux/sched.h"
+#include "linux/mm.h"
+#include "asm/page.h"
+#include "asm/pgtable.h"
+#include "asm/mmu.h"
+#include "user_util.h"
+#include "mem_user.h"
+#include "mem.h"
+#include "skas.h"
+#include "os.h"
+#include "tlb.h"
+
+static void do_ops(int fd, struct host_vm_op *ops, int last)
+{
+        struct host_vm_op *op;
+        int i;
+
+        for(i = 0; i <= last; i++){
+                op = &ops[i];
+                switch(op->type){
+                case MMAP:
+                        map(fd, op->u.mmap.addr, op->u.mmap.len,
+                            op->u.mmap.r, op->u.mmap.w, op->u.mmap.x,
+                            op->u.mmap.fd, op->u.mmap.offset);
+                        break;
+                case MUNMAP:
+                        unmap(fd, (void *) op->u.munmap.addr,
+                              op->u.munmap.len);
+                        break;
+                case MPROTECT:
+                        protect(fd, op->u.mprotect.addr, op->u.mprotect.len,
+                                op->u.mprotect.r, op->u.mprotect.w,
+                                op->u.mprotect.x);
+                        break;
+                default:
+                        printk("Unknown op type %d in do_ops\n", op->type);
+                        break;
+                }
+        }
+}
+
+static void fix_range(struct mm_struct *mm, unsigned long start_addr,
+                      unsigned long end_addr, int force)
+{
+        int fd = mm->context.skas.mm_fd;
+
+        fix_range_common(mm, start_addr, end_addr, force, fd, do_ops);
+}
+
+void __flush_tlb_one_skas(unsigned long addr)
+{
+        flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
+}
+
+void flush_tlb_range_skas(struct vm_area_struct *vma, unsigned long start, 
+                     unsigned long end)
+{
+        if(vma->vm_mm == NULL)
+                flush_tlb_kernel_range_common(start, end);
+        else fix_range(vma->vm_mm, start, end, 0);
+}
+
+void flush_tlb_mm_skas(struct mm_struct *mm)
+{
+        /* Don't bother flushing if this address space is about to be
+         * destroyed.
+         */
+        if(atomic_read(&mm->mm_users) == 0)
+                return;
+
+        fix_range(mm, 0, host_task_size, 0);
+        flush_tlb_kernel_range_common(start_vm, end_vm);
+}
+
+void force_flush_all_skas(void)
+{
+        fix_range(current->mm, 0, host_task_size, 1);
+}