Merge master.kernel.org:/home/rmk/linux-2.6-serial
[linux-2.6] / arch / um / kernel / skas / tlb.c
1 /* 
2  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3  * Copyright 2003 PathScale, Inc.
4  * Licensed under the GPL
5  */
6
7 #include "linux/stddef.h"
8 #include "linux/sched.h"
9 #include "linux/config.h"
10 #include "linux/mm.h"
11 #include "asm/page.h"
12 #include "asm/pgtable.h"
13 #include "asm/mmu.h"
14 #include "user_util.h"
15 #include "mem_user.h"
16 #include "mem.h"
17 #include "skas.h"
18 #include "os.h"
19 #include "tlb.h"
20
21 static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
22                   int finished, void **flush)
23 {
24         struct host_vm_op *op;
25         int i, ret = 0;
26
27         for(i = 0; i <= last && !ret; i++){
28                 op = &ops[i];
29                 switch(op->type){
30                 case MMAP:
31                         ret = map(&mmu->skas.id, op->u.mmap.addr,
32                                   op->u.mmap.len, op->u.mmap.r, op->u.mmap.w,
33                                   op->u.mmap.x, op->u.mmap.fd,
34                                   op->u.mmap.offset, finished, flush);
35                         break;
36                 case MUNMAP:
37                         ret = unmap(&mmu->skas.id,
38                                     (void *) op->u.munmap.addr,
39                                     op->u.munmap.len, finished, flush);
40                         break;
41                 case MPROTECT:
42                         ret = protect(&mmu->skas.id, op->u.mprotect.addr,
43                                       op->u.mprotect.len, op->u.mprotect.r,
44                                       op->u.mprotect.w, op->u.mprotect.x,
45                                       finished, flush);
46                         break;
47                 default:
48                         printk("Unknown op type %d in do_ops\n", op->type);
49                         break;
50                 }
51         }
52
53         return ret;
54 }
55
56 extern int proc_mm;
57
58 static void fix_range(struct mm_struct *mm, unsigned long start_addr,
59                       unsigned long end_addr, int force)
60 {
61         if(!proc_mm && (end_addr > CONFIG_STUB_START))
62                 end_addr = CONFIG_STUB_START;
63
64         fix_range_common(mm, start_addr, end_addr, force, do_ops);
65 }
66
67 void __flush_tlb_one_skas(unsigned long addr)
68 {
69         flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
70 }
71
72 void flush_tlb_range_skas(struct vm_area_struct *vma, unsigned long start, 
73                      unsigned long end)
74 {
75         if(vma->vm_mm == NULL)
76                 flush_tlb_kernel_range_common(start, end);
77         else fix_range(vma->vm_mm, start, end, 0);
78 }
79
80 void flush_tlb_mm_skas(struct mm_struct *mm)
81 {
82         unsigned long end;
83
84         /* Don't bother flushing if this address space is about to be
85          * destroyed.
86          */
87         if(atomic_read(&mm->mm_users) == 0)
88                 return;
89
90         end = proc_mm ? task_size : CONFIG_STUB_START;
91         fix_range(mm, 0, end, 0);
92 }
93
94 void force_flush_all_skas(void)
95 {
96         unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
97         fix_range(current->mm, 0, end, 1);
98 }