← Back to branch summary

~ubuntu-branches/ubuntu/utopic/xen/utopic

« back to all changes in this revision

Viewing changes to xen/arch/ia64/linux/sn/kernel/pio_phys.S

  • Committer: Bazaar Package Importer
  • Author(s): Bastian Blank
  • Date: 2010-05-06 15:47:38 UTC
  • mto: (1.3.1) (15.1.1 sid) (4.1.1 experimental)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20100506154738-agoz0rlafrh1fnq7
Tags: upstream-4.0.0
Import upstream version 4.0.0

Show diffs side-by-side

added added

removed removed

Lines of Context:
xen/arch/ia64/linux/sn/kernel/pio_phys.S
 
1
/*
 
2
 * This file is subject to the terms and conditions of the GNU General Public
 
3
 * License.  See the file "COPYING" in the main directory of this archive
 
4
 * for more details.
 
5
 *
 
6
 * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
 
7
 *
 
8
 * This file contains macros used to access MMR registers via
 
9
 * uncached physical addresses.
 
10
 *      pio_phys_read_mmr  - read an MMR
 
11
 *      pio_phys_write_mmr - write an MMR
 
12
 *      pio_atomic_phys_write_mmrs - atomically write 1 or 2 MMRs with psr.ic=0
 
13
 *              Second MMR will be skipped if address is NULL
 
14
 *
 
15
 * Addresses passed to these routines should be uncached physical addresses
 
16
 *      ie., 0x80000....
 
17
 */
 
18
 
 
19
 
 
20
 
 
21
#include <asm/asmmacro.h>
 
22
#include <asm/page.h>
 
23
 
 
24
GLOBAL_ENTRY(pio_phys_read_mmr)
 
25
        .prologue
 
26
        .regstk 1,0,0,0
 
27
        .body
 
28
        mov r2=psr
 
29
        rsm psr.i | psr.dt
 
30
        ;;
 
31
        srlz.d
 
32
        ld8.acq r8=[r32]
 
33
        ;;
 
34
        mov psr.l=r2;;
 
35
        srlz.d
 
36
        br.ret.sptk.many rp
 
37
END(pio_phys_read_mmr)
 
38
 
 
39
GLOBAL_ENTRY(pio_phys_write_mmr)
 
40
        .prologue
 
41
        .regstk 2,0,0,0
 
42
        .body
 
43
        mov r2=psr
 
44
        rsm psr.i | psr.dt
 
45
        ;;
 
46
        srlz.d
 
47
        st8.rel [r32]=r33
 
48
        ;;
 
49
        mov psr.l=r2;;
 
50
        srlz.d
 
51
        br.ret.sptk.many rp
 
52
END(pio_phys_write_mmr)
 
53
 
 
54
GLOBAL_ENTRY(pio_atomic_phys_write_mmrs)
 
55
        .prologue
 
56
        .regstk 4,0,0,0
 
57
        .body
 
58
        mov r2=psr
 
59
        cmp.ne p9,p0=r34,r0;
 
60
        rsm psr.i | psr.dt | psr.ic
 
61
        ;;
 
62
        srlz.d
 
63
        st8.rel [r32]=r33
 
64
(p9)    st8.rel [r34]=r35
 
65
        ;;
 
66
        mov psr.l=r2;;
 
67
        srlz.d
 
68
        br.ret.sptk.many rp
 
69
END(pio_atomic_phys_write_mmrs)
 
70
 
 
71