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-rw-r--r--arch/xtensa/kernel/io.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/io.c b/arch/xtensa/kernel/io.c
new file mode 100644
index 00000000000..5b65269b1d2
--- /dev/null
+++ b/arch/xtensa/kernel/io.c
@@ -0,0 +1,75 @@
+/*
+ * arch/xtensa/io.c
+ *
+ * IO primitives
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Copied from sparc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ *
+ */
+
+#include <asm/io.h>
+#include <asm/byteorder.h>
+
+void outsb(unsigned long addr, const void *src, unsigned long count) {
+ while (count) {
+ count -= 1;
+ writeb(*(const char *)src, addr);
+ src += 1;
+ addr += 1;
+ }
+}
+
+void outsw(unsigned long addr, const void *src, unsigned long count) {
+ while (count) {
+ count -= 2;
+ writew(*(const short *)src, addr);
+ src += 2;
+ addr += 2;
+ }
+}
+
+void outsl(unsigned long addr, const void *src, unsigned long count) {
+ while (count) {
+ count -= 4;
+ writel(*(const long *)src, addr);
+ src += 4;
+ addr += 4;
+ }
+}
+
+void insb(unsigned long addr, void *dst, unsigned long count) {
+ while (count) {
+ count -= 1;
+ *(unsigned char *)dst = readb(addr);
+ dst += 1;
+ addr += 1;
+ }
+}
+
+void insw(unsigned long addr, void *dst, unsigned long count) {
+ while (count) {
+ count -= 2;
+ *(unsigned short *)dst = readw(addr);
+ dst += 2;
+ addr += 2;
+ }
+}
+
+void insl(unsigned long addr, void *dst, unsigned long count) {
+ while (count) {
+ count -= 4;
+ /*
+ * XXX I am sure we are in for an unaligned trap here.
+ */
+ *(unsigned long *)dst = readl(addr);
+ dst += 4;
+ addr += 4;
+ }
+}