1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * arch/sh/lib/io.c - SH32 optimized I/O routines
4 *
5 * Copyright (C) 2000 Stuart Menefy
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * Provide real functions which expand to whatever the header file defined.
9 * Also definitions of machine independent IO functions.
10 */
11 #include <linux/module.h>
12 #include <linux/io.h>
13
14 void __raw_readsl(const void __iomem *addr, void *datap, int len)
15 {
16 u32 *data;
17
18 for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--)
19 *data++ = __raw_readl(addr);
20
21 if (likely(len >= (0x20 >> 2))) {
22 int tmp2, tmp3, tmp4, tmp5, tmp6;
23
24 __asm__ __volatile__(
25 "1: \n\t"
26 "mov.l @%7, r0 \n\t"
27 "mov.l @%7, %2 \n\t"
28 #ifdef CONFIG_CPU_SH4
29 "movca.l r0, @%0 \n\t"
30 #else
31 "mov.l r0, @%0 \n\t"
32 #endif
33 "mov.l @%7, %3 \n\t"
34 "mov.l @%7, %4 \n\t"
35 "mov.l @%7, %5 \n\t"
36 "mov.l @%7, %6 \n\t"
37 "mov.l @%7, r7 \n\t"
38 "mov.l @%7, r0 \n\t"
39 "mov.l %2, @(0x04,%0) \n\t"
40 "mov #0x20>>2, %2 \n\t"
41 "mov.l %3, @(0x08,%0) \n\t"
42 "sub %2, %1 \n\t"
43 "mov.l %4, @(0x0c,%0) \n\t"
44 "cmp/hi %1, %2 ! T if 32 > len \n\t"
45 "mov.l %5, @(0x10,%0) \n\t"
46 "mov.l %6, @(0x14,%0) \n\t"
47 "mov.l r7, @(0x18,%0) \n\t"
48 "mov.l r0, @(0x1c,%0) \n\t"
49 "bf.s 1b \n\t"
50 " add #0x20, %0 \n\t"
51 : "=&r" (data), "=&r" (len),
52 "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4),
53 "=&r" (tmp5), "=&r" (tmp6)
54 : "r"(addr), "" (data), "1" (len)
55 : "r0", "r7", "t", "memory");
56 }
57
58 for (; len != 0; len--)
59 *data++ = __raw_readl(addr);
60 }
61 EXPORT_SYMBOL(__raw_readsl);
62
63 void __raw_writesl(void __iomem *addr, const void *data, int len)
64 {
65 if (likely(len != 0)) {
66 int tmp1;
67
68 __asm__ __volatile__ (
69 "1: \n\t"
70 "mov.l @%0+, %1 \n\t"
71 "dt %3 \n\t"
72 "bf.s 1b \n\t"
73 " mov.l %1, @%4 \n\t"
74 : "=&r" (data), "=&r" (tmp1)
75 : "" (data), "r" (len), "r"(addr)
76 : "t", "memory");
77 }
78 }
79 EXPORT_SYMBOL(__raw_writesl);
80
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