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| // SPDX-License-Identifier: GPL-2.0
| /*
| * arch/sh/lib/io.c - SH32 optimized I/O routines
| *
| * Copyright (C) 2000 Stuart Menefy
| * Copyright (C) 2005 Paul Mundt
| *
| * Provide real functions which expand to whatever the header file defined.
| * Also definitions of machine independent IO functions.
| */
| #include <linux/module.h>
| #include <linux/io.h>
|
| void __raw_readsl(const void __iomem *addr, void *datap, int len)
| {
| u32 *data;
|
| for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--)
| *data++ = __raw_readl(addr);
|
| if (likely(len >= (0x20 >> 2))) {
| int tmp2, tmp3, tmp4, tmp5, tmp6;
|
| __asm__ __volatile__(
| "1: \n\t"
| "mov.l @%7, r0 \n\t"
| "mov.l @%7, %2 \n\t"
| #ifdef CONFIG_CPU_SH4
| "movca.l r0, @%0 \n\t"
| #else
| "mov.l r0, @%0 \n\t"
| #endif
| "mov.l @%7, %3 \n\t"
| "mov.l @%7, %4 \n\t"
| "mov.l @%7, %5 \n\t"
| "mov.l @%7, %6 \n\t"
| "mov.l @%7, r7 \n\t"
| "mov.l @%7, r0 \n\t"
| "mov.l %2, @(0x04,%0) \n\t"
| "mov #0x20>>2, %2 \n\t"
| "mov.l %3, @(0x08,%0) \n\t"
| "sub %2, %1 \n\t"
| "mov.l %4, @(0x0c,%0) \n\t"
| "cmp/hi %1, %2 ! T if 32 > len \n\t"
| "mov.l %5, @(0x10,%0) \n\t"
| "mov.l %6, @(0x14,%0) \n\t"
| "mov.l r7, @(0x18,%0) \n\t"
| "mov.l r0, @(0x1c,%0) \n\t"
| "bf.s 1b \n\t"
| " add #0x20, %0 \n\t"
| : "=&r" (data), "=&r" (len),
| "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4),
| "=&r" (tmp5), "=&r" (tmp6)
| : "r"(addr), "0" (data), "1" (len)
| : "r0", "r7", "t", "memory");
| }
|
| for (; len != 0; len--)
| *data++ = __raw_readl(addr);
| }
| EXPORT_SYMBOL(__raw_readsl);
|
| void __raw_writesl(void __iomem *addr, const void *data, int len)
| {
| if (likely(len != 0)) {
| int tmp1;
|
| __asm__ __volatile__ (
| "1: \n\t"
| "mov.l @%0+, %1 \n\t"
| "dt %3 \n\t"
| "bf.s 1b \n\t"
| " mov.l %1, @%4 \n\t"
| : "=&r" (data), "=&r" (tmp1)
| : "0" (data), "r" (len), "r"(addr)
| : "t", "memory");
| }
| }
| EXPORT_SYMBOL(__raw_writesl);
|
|
