// 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 volatile 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(volatile 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);