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