diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/kernel/io.c')
-rw-r--r-- | ANDROID_3.4.5/arch/arm/kernel/io.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/io.c b/ANDROID_3.4.5/arch/arm/kernel/io.c new file mode 100644 index 00000000..dcd5b4d8 --- /dev/null +++ b/ANDROID_3.4.5/arch/arm/kernel/io.c @@ -0,0 +1,50 @@ +#include <linux/export.h> +#include <linux/types.h> +#include <linux/io.h> + +/* + * Copy data from IO memory space to "real" memory space. + * This needs to be optimized. + */ +void _memcpy_fromio(void *to, const volatile void __iomem *from, size_t count) +{ + unsigned char *t = to; + while (count) { + count--; + *t = readb(from); + t++; + from++; + } +} + +/* + * Copy data from "real" memory space to IO memory space. + * This needs to be optimized. + */ +void _memcpy_toio(volatile void __iomem *to, const void *from, size_t count) +{ + const unsigned char *f = from; + while (count) { + count--; + writeb(*f, to); + f++; + to++; + } +} + +/* + * "memset" on IO memory space. + * This needs to be optimized. + */ +void _memset_io(volatile void __iomem *dst, int c, size_t count) +{ + while (count) { + count--; + writeb(c, dst); + dst++; + } +} + +EXPORT_SYMBOL(_memcpy_fromio); +EXPORT_SYMBOL(_memcpy_toio); +EXPORT_SYMBOL(_memset_io); |