Linux 2.6.17.7
[linux/fpc-iii.git] / arch / um / kernel / skas / tlb.c
blob6e84963dfc29e99c93bcdfe1cd2e11c1103c9310
1 /*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Copyright 2003 PathScale, Inc.
4 * Licensed under the GPL
5 */
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"
21 static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
22 int finished, void **flush)
24 struct host_vm_op *op;
25 int i, ret = 0;
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;
53 return ret;
56 extern int proc_mm;
58 static void fix_range(struct mm_struct *mm, unsigned long start_addr,
59 unsigned long end_addr, int force)
61 if(!proc_mm && (end_addr > CONFIG_STUB_START))
62 end_addr = CONFIG_STUB_START;
64 fix_range_common(mm, start_addr, end_addr, force, do_ops);
67 void __flush_tlb_one_skas(unsigned long addr)
69 flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
72 void flush_tlb_range_skas(struct vm_area_struct *vma, unsigned long start,
73 unsigned long end)
75 if(vma->vm_mm == NULL)
76 flush_tlb_kernel_range_common(start, end);
77 else fix_range(vma->vm_mm, start, end, 0);
80 void flush_tlb_mm_skas(struct mm_struct *mm)
82 unsigned long end;
84 /* Don't bother flushing if this address space is about to be
85 * destroyed.
87 if(atomic_read(&mm->mm_users) == 0)
88 return;
90 end = proc_mm ? task_size : CONFIG_STUB_START;
91 fix_range(mm, 0, end, 0);
94 void force_flush_all_skas(void)
96 unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
97 fix_range(current->mm, 0, end, 1);