mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 01:45:20 +07:00
5933f6d220
Update license to use SPDX-License-Identifier instead of verbose license text. Link: http://lkml.kernel.org/r/8736rccswn.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Cc: Rich Felker <dalias@libc.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
// 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);
|