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4494ce4f | 1 | // SPDX-License-Identifier: GPL-2.0 |
62d6b66e PM |
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. | |
62d6b66e PM |
10 | */ |
11 | #include <linux/module.h> | |
12 | #include <linux/io.h> | |
13 | ||
64c9627c | 14 | void __raw_readsl(const void __iomem *addr, void *datap, int len) |
62d6b66e PM |
15 | { |
16 | u32 *data; | |
17 | ||
18 | for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--) | |
64c9627c | 19 | *data++ = __raw_readl(addr); |
62d6b66e PM |
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), "0" (data), "1" (len) | |
55 | : "r0", "r7", "t", "memory"); | |
56 | } | |
57 | ||
58 | for (; len != 0; len--) | |
64c9627c | 59 | *data++ = __raw_readl(addr); |
62d6b66e PM |
60 | } |
61 | EXPORT_SYMBOL(__raw_readsl); | |
62 | ||
64c9627c | 63 | void __raw_writesl(void __iomem *addr, const void *data, int len) |
62d6b66e PM |
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 | : "0" (data), "r" (len), "r"(addr) | |
76 | : "t", "memory"); | |
77 | } | |
78 | } | |
79 | EXPORT_SYMBOL(__raw_writesl); |