Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
csky: Use new fallback IO memcpy/memset
Use the new fallback memcpy_{from,to}io and memset_io functions from
lib/iomem_copy.c on the csky processor architecture.
Acked-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Yann Sionneau <ysionneau@kalrayinc.com>
Signed-off-by: Julian Vetter <jvetter@kalrayinc.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
authored by
Julian Vetter
and committed by
Arnd Bergmann
4c9397cf
0110feaa
+1
-103
-11
arch/csky/include/asm/io.h
-11
arch/csky/include/asm/io.h
···
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#endif
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/*
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* String version of I/O memory access operations.
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*/
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extern void __memcpy_fromio(void *, const volatile void __iomem *, size_t);
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extern void __memcpy_toio(volatile void __iomem *, const void *, size_t);
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extern void __memset_io(volatile void __iomem *, int, size_t);
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#define memset_io(c,v,l) __memset_io((c),(v),(l))
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#define memcpy_fromio(a,c,l) __memcpy_fromio((a),(c),(l))
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#define memcpy_toio(c,a,l) __memcpy_toio((c),(a),(l))
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/*
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* I/O memory mapping functions.
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*/
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#define ioremap_wc(addr, size) \
+1
-1
arch/csky/kernel/Makefile
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-1
arch/csky/kernel/Makefile
···
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extra-y := vmlinux.lds
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obj-y += head.o entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/
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obj-y += power.o syscall.o syscall_table.o setup.o io.o
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obj-y += power.o syscall.o syscall_table.o setup.o
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obj-y += process.o cpu-probe.o ptrace.o stacktrace.o
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obj-y += probes/
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-91
arch/csky/kernel/io.c
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arch/csky/kernel/io.c
···
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/export.h>
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#include <linux/types.h>
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#include <linux/io.h>
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/*
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* Copy data from IO memory space to "real" memory space.
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*/
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void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
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{
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while (count && !IS_ALIGNED((unsigned long)from, 4)) {
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*(u8 *)to = __raw_readb(from);
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from++;
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to++;
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count--;
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}
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while (count >= 4) {
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*(u32 *)to = __raw_readl(from);
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from += 4;
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to += 4;
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count -= 4;
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}
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while (count) {
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*(u8 *)to = __raw_readb(from);
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from++;
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to++;
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count--;
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}
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}
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EXPORT_SYMBOL(__memcpy_fromio);
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-
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/*
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* Copy data from "real" memory space to IO memory space.
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*/
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void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
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{
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while (count && !IS_ALIGNED((unsigned long)to, 4)) {
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__raw_writeb(*(u8 *)from, to);
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from++;
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to++;
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count--;
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}
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while (count >= 4) {
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__raw_writel(*(u32 *)from, to);
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from += 4;
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to += 4;
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count -= 4;
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}
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while (count) {
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__raw_writeb(*(u8 *)from, to);
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from++;
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to++;
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count--;
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}
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}
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EXPORT_SYMBOL(__memcpy_toio);
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/*
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* "memset" on IO memory space.
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*/
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void __memset_io(volatile void __iomem *dst, int c, size_t count)
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{
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u32 qc = (u8)c;
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qc |= qc << 8;
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qc |= qc << 16;
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while (count && !IS_ALIGNED((unsigned long)dst, 4)) {
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__raw_writeb(c, dst);
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dst++;
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count--;
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}
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while (count >= 4) {
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__raw_writel(qc, dst);
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dst += 4;
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count -= 4;
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}
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while (count) {
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__raw_writeb(c, dst);
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dst++;
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count--;
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}
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}
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EXPORT_SYMBOL(__memset_io);