diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh/kernel/io.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/sh/kernel/io.c')
-rw-r--r-- | arch/sh/kernel/io.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/sh/kernel/io.c b/arch/sh/kernel/io.c new file mode 100644 index 000000000000..d9932f25993b --- /dev/null +++ b/arch/sh/kernel/io.c @@ -0,0 +1,59 @@ +/* + * linux/arch/sh/kernel/io.c + * + * Copyright (C) 2000 Stuart Menefy + * + * Provide real functions which expand to whatever the header file defined. + * Also definitions of machine independent IO functions. + */ + +#include <asm/io.h> +#include <linux/module.h> + +/* + * Copy data from IO memory space to "real" memory space. + * This needs to be optimized. + */ +void memcpy_fromio(void * to, unsigned long from, unsigned long count) +{ + char *p = to; + while (count) { + count--; + *p = readb(from); + p++; + from++; + } +} + +/* + * Copy data from "real" memory space to IO memory space. + * This needs to be optimized. + */ +void memcpy_toio(unsigned long to, const void * from, unsigned long count) +{ + const char *p = from; + while (count) { + count--; + writeb(*p, to); + p++; + to++; + } +} + +/* + * "memset" on IO memory space. + * This needs to be optimized. + */ +void memset_io(unsigned long dst, int c, unsigned long count) +{ + while (count) { + count--; + writeb(c, dst); + dst++; + } +} + +EXPORT_SYMBOL(memcpy_fromio); +EXPORT_SYMBOL(memcpy_toio); +EXPORT_SYMBOL(memset_io); + |