// SPDX-License-Identifier: GPL-2.0/* * arch/sh/kernel/io.c - Machine independent I/O functions. * * Copyright (C) 2000 - 2009  Stuart Menefy * Copyright (C) 2005  Paul Mundt */#include <linux/module.h>#include <linux/pci.h>#include <asm/machvec.h>#include <asm/io.h> /* * Copy data from IO memory space to "real" memory space. */void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned long count){	/*	 * Would it be worthwhile doing byte and long transfers first	 * to try and get aligned?	 */#ifdef CONFIG_CPU_SH4	if ((count >= 0x20) &&	     (((u32)to & 0x1f) == 0) && (((u32)from & 0x3) == 0)) {		int tmp2, tmp3, tmp4, tmp5, tmp6; 		__asm__ __volatile__(			"1:			\n\t"			"mov.l	@%7+, r0	\n\t"			"mov.l	@%7+, %2	\n\t"			"movca.l r0, @%0	\n\t"			"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	\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 > count	\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" (to), "=&r" (count),			  "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4),			  "=&r" (tmp5), "=&r" (tmp6), "=&r" (from)			: "7"(from), "0" (to), "1" (count)			: "r0", "r7", "t", "memory");	}#endif 	if ((((u32)to | (u32)from) & 0x3) == 0) {		for (; count > 3; count -= 4) {			*(u32 *)to = *(volatile u32 *)from;			to += 4;			from += 4;		}	} 	for (; count > 0; count--) {		*(u8 *)to = *(volatile u8 *)from;		to++;		from++;	} 	mb();}EXPORT_SYMBOL(memcpy_fromio); /* * Copy data from "real" memory space to IO memory space. */void memcpy_toio(volatile void __iomem *to, const void *from, unsigned long count){	if ((((u32)to | (u32)from) & 0x3) == 0) {		for ( ; count > 3; count -= 4) {			*(volatile u32 *)to = *(u32 *)from;			to += 4;			from += 4;		}	} 	for (; count > 0; count--) {		*(volatile u8 *)to = *(u8 *)from;		to++;		from++;	} 	mb();}EXPORT_SYMBOL(memcpy_toio); /* * "memset" on IO memory space. * This needs to be optimized. */void memset_io(volatile void __iomem *dst, int c, unsigned long count){        while (count) {                count--;                writeb(c, dst);                dst++;        }}EXPORT_SYMBOL(memset_io);