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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/kernel/io.c
Linux-2.6.12-rc2v2.6.12-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/arm/kernel/io.c')
-rw-r--r--arch/arm/kernel/io.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/kernel/io.c b/arch/arm/kernel/io.c
new file mode 100644
index 000000000000..6c20c1188b60
--- /dev/null
+++ b/arch/arm/kernel/io.c
@@ -0,0 +1,51 @@
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+
+/*
+ * Copy data from IO memory space to "real" memory space.
+ * This needs to be optimized.
+ */
+void _memcpy_fromio(void *to, 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(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(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);