Merge branches 'release', 'misc' and 'misc-2.6.25' into release
[linux-2.6] / arch / sh / lib / io.c
1 /*
2  * arch/sh/lib/io.c - SH32 optimized I/O routines
3  *
4  * Copyright (C) 2000  Stuart Menefy
5  * Copyright (C) 2005  Paul Mundt
6  *
7  * Provide real functions which expand to whatever the header file defined.
8  * Also definitions of machine independent IO functions.
9  *
10  * This file is subject to the terms and conditions of the GNU General Public
11  * License.  See the file "COPYING" in the main directory of this archive
12  * for more details.
13  */
14 #include <linux/module.h>
15 #include <linux/io.h>
16
17 void __raw_readsl(unsigned long addr, void *datap, int len)
18 {
19         u32 *data;
20
21         for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--)
22                 *data++ = ctrl_inl(addr);
23
24         if (likely(len >= (0x20 >> 2))) {
25                 int tmp2, tmp3, tmp4, tmp5, tmp6;
26
27                 __asm__ __volatile__(
28                         "1:                     \n\t"
29                         "mov.l  @%7, r0         \n\t"
30                         "mov.l  @%7, %2         \n\t"
31 #ifdef CONFIG_CPU_SH4
32                         "movca.l r0, @%0        \n\t"
33 #else
34                         "mov.l  r0, @%0         \n\t"
35 #endif
36                         "mov.l  @%7, %3         \n\t"
37                         "mov.l  @%7, %4         \n\t"
38                         "mov.l  @%7, %5         \n\t"
39                         "mov.l  @%7, %6         \n\t"
40                         "mov.l  @%7, r7         \n\t"
41                         "mov.l  @%7, r0         \n\t"
42                         "mov.l  %2, @(0x04,%0)  \n\t"
43                         "mov    #0x20>>2, %2    \n\t"
44                         "mov.l  %3, @(0x08,%0)  \n\t"
45                         "sub    %2, %1          \n\t"
46                         "mov.l  %4, @(0x0c,%0)  \n\t"
47                         "cmp/hi %1, %2          ! T if 32 > len \n\t"
48                         "mov.l  %5, @(0x10,%0)  \n\t"
49                         "mov.l  %6, @(0x14,%0)  \n\t"
50                         "mov.l  r7, @(0x18,%0)  \n\t"
51                         "mov.l  r0, @(0x1c,%0)  \n\t"
52                         "bf.s   1b              \n\t"
53                         " add   #0x20, %0       \n\t"
54                         : "=&r" (data), "=&r" (len),
55                           "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4),
56                           "=&r" (tmp5), "=&r" (tmp6)
57                         : "r"(addr), "0" (data), "1" (len)
58                         : "r0", "r7", "t", "memory");
59         }
60
61         for (; len != 0; len--)
62                 *data++ = ctrl_inl(addr);
63 }
64 EXPORT_SYMBOL(__raw_readsl);
65
66 void __raw_writesl(unsigned long addr, const void *data, int len)
67 {
68         if (likely(len != 0)) {
69                 int tmp1;
70
71                 __asm__ __volatile__ (
72                         "1:                             \n\t"
73                         "mov.l  @%0+, %1        \n\t"
74                         "dt             %3              \n\t"
75                         "bf.s           1b              \n\t"
76                         " mov.l %1, @%4         \n\t"
77                         : "=&r" (data), "=&r" (tmp1)
78                         : "0" (data), "r" (len), "r"(addr)
79                         : "t", "memory");
80         }
81 }
82 EXPORT_SYMBOL(__raw_writesl);