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parisc: Remove memcpy_toio and memset_io

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Recently new functions for IO memcpy and IO memset were added in
libs/iomem_copy.c. So, remove the arch specific implementations, to fall
back to the generic ones which do exactly the same. Keep memcpy_fromio
for now, because it's slight more optimized by doing 'u16' accesses if
the buffer is aligned this way.

Signed-off-by: Julian Vetter <julian@outer-limits.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Julian Vetter 2024-12-04 09:04:40 +01:00 committed by Helge Deller
parent adc218676e
commit df195d931a
3 changed files with 0 additions and 53 deletions
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4
arch/parisc/include/asm/io.h
View File

@ -135,12 +135,8 @@ static inline void gsc_writeq(unsigned long long val, unsigned long addr)
#define pci_iounmap pci_iounmap
void memset_io(volatile void __iomem *addr, unsigned char val, int count);
void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
#define memset_io memset_io
#define memcpy_fromio memcpy_fromio
#define memcpy_toio memcpy_toio
/* Port-space IO */

2
arch/parisc/kernel/parisc_ksyms.c
View File

@ -43,9 +43,7 @@ EXPORT_SYMBOL($global$);
#endif
#include <asm/io.h>
EXPORT_SYMBOL(memcpy_toio);
EXPORT_SYMBOL(memcpy_fromio);
EXPORT_SYMBOL(memset_io);
extern void $$divI(void);
extern void $$divU(void);

47
arch/parisc/lib/io.c
View File

@ -12,32 +12,6 @@
#include <linux/module.h>
#include <asm/io.h>
/* Copies a block of memory to a device in an efficient manner.
* Assumes the device can cope with 32-bit transfers. If it can't,
* don't use this function.
*/
void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
{
if (((unsigned long)dst & 3) != ((unsigned long)src & 3))
goto bytecopy;
while ((unsigned long)dst & 3) {
writeb(*(char *)src, dst++);
src++;
count--;
}
while (count > 3) {
__raw_writel(*(u32 *)src, dst);
src += 4;
dst += 4;
count -= 4;
}
bytecopy:
while (count--) {
writeb(*(char *)src, dst++);
src++;
}
}
/*
** Copies a block of memory from a device in an efficient manner.
** Assumes the device can cope with 32-bit transfers. If it can't,
@ -99,27 +73,6 @@ void memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
}
}
/* Sets a block of memory on a device to a given value.
* Assumes the device can cope with 32-bit transfers. If it can't,
* don't use this function.
*/
void memset_io(volatile void __iomem *addr, unsigned char val, int count)
{
u32 val32 = (val << 24) | (val << 16) | (val << 8) | val;
while ((unsigned long)addr & 3) {
writeb(val, addr++);
count--;
}
while (count > 3) {
__raw_writel(val32, addr);
addr += 4;
count -= 4;
}
while (count--) {
writeb(val, addr++);
}
}
/*
* Read COUNT 8-bit bytes from port PORT into memory starting at
* SRC.