Use the new fallback memcpy_{from,to}io and memset_io functions from
asm-generic/io.h on the csky processor architecture.
Acked-by: Guo Ren <guoren@xxxxxxxxxx>
Reviewed-by: Yann Sionneau <ysionneau@xxxxxxxxxxxxx>
Signed-off-by: Julian Vetter <jvetter@xxxxxxxxxxxxx>
---
Changes for v10:
- Slightly updated commit message to clarify that on csky we now use
the fallback from asm-generic/io.h
---
arch/csky/include/asm/io.h | 11 -----
arch/csky/kernel/Makefile | 2 +-
arch/csky/kernel/io.c | 91 --------------------------------------
3 files changed, 1 insertion(+), 103 deletions(-)
delete mode 100644 arch/csky/kernel/io.c
diff --git a/arch/csky/include/asm/io.h b/arch/csky/include/asm/io.h
index 4725bb977b0f..ed53f0b47388 100644
--- a/arch/csky/include/asm/io.h
+++ b/arch/csky/include/asm/io.h
@@ -31,17 +31,6 @@
#define writel(v,c) ({ wmb(); writel_relaxed((v),(c)); mb(); })
#endif
-/*
- * String version of I/O memory access operations.
- */
-extern void __memcpy_fromio(void *, const volatile void __iomem *, size_t);
-extern void __memcpy_toio(volatile void __iomem *, const void *, size_t);
-extern void __memset_io(volatile void __iomem *, int, size_t);
-
-#define memset_io(c,v,l) __memset_io((c),(v),(l))
-#define memcpy_fromio(a,c,l) __memcpy_fromio((a),(c),(l))
-#define memcpy_toio(c,a,l) __memcpy_toio((c),(a),(l))
-
/*
* I/O memory mapping functions.
*/
diff --git a/arch/csky/kernel/Makefile b/arch/csky/kernel/Makefile
index 8a868316b912..de1c3472e8f0 100644
--- a/arch/csky/kernel/Makefile
+++ b/arch/csky/kernel/Makefile
@@ -2,7 +2,7 @@
extra-y := vmlinux.lds
obj-y += head.o entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/
-obj-y += power.o syscall.o syscall_table.o setup.o io.o
+obj-y += power.o syscall.o syscall_table.o setup.o
obj-y += process.o cpu-probe.o ptrace.o stacktrace.o
obj-y += probes/
diff --git a/arch/csky/kernel/io.c b/arch/csky/kernel/io.c
deleted file mode 100644
index 5883f13fa2b1..000000000000
--- a/arch/csky/kernel/io.c
+++ /dev/null
@@ -1,91 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/export.h>
-#include <linux/types.h>
-#include <linux/io.h>
-
-/*
- * Copy data from IO memory space to "real" memory space.
- */
-void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
-{
- while (count && !IS_ALIGNED((unsigned long)from, 4)) {
- *(u8 *)to = __raw_readb(from);
- from++;
- to++;
- count--;
- }
-
- while (count >= 4) {
- *(u32 *)to = __raw_readl(from);
- from += 4;
- to += 4;
- count -= 4;
- }
-
- while (count) {
- *(u8 *)to = __raw_readb(from);
- from++;
- to++;
- count--;
- }
-}
-EXPORT_SYMBOL(__memcpy_fromio);
-
-/*
- * Copy data from "real" memory space to IO memory space.
- */
-void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
-{
- while (count && !IS_ALIGNED((unsigned long)to, 4)) {
- __raw_writeb(*(u8 *)from, to);
- from++;
- to++;
- count--;
- }
-
- while (count >= 4) {
- __raw_writel(*(u32 *)from, to);
- from += 4;
- to += 4;
- count -= 4;
- }
-
- while (count) {
- __raw_writeb(*(u8 *)from, to);
- from++;
- to++;
- count--;
- }
-}
-EXPORT_SYMBOL(__memcpy_toio);
-
-/*
- * "memset" on IO memory space.
- */
-void __memset_io(volatile void __iomem *dst, int c, size_t count)
-{
- u32 qc = (u8)c;
-
- qc |= qc << 8;
- qc |= qc << 16;
-
- while (count && !IS_ALIGNED((unsigned long)dst, 4)) {
- __raw_writeb(c, dst);
- dst++;
- count--;
- }
-
- while (count >= 4) {
- __raw_writel(qc, dst);
- dst += 4;
- count -= 4;
- }
-
- while (count) {
- __raw_writeb(c, dst);
- dst++;
- count--;
- }
-}
-EXPORT_SYMBOL(__memset_io);
--
2.34.1
