Add a simple library for accessing i/o ports and memory on the alpha.

This is only intended for use by the X server.

1 files changed, 151 insertions, 0 deletions

diff --git a/lib/libio/io.c b/lib/libio/io.c
new file mode 100644
index 0000000..f847755
--- /dev/null
+++ b/lib/libio/io.c
@@ -0,0 +1,151 @@
+/*-
+ * Copyright (c) 1998 Doug Rabson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$Id$
+ */
+
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <err.h>
+#include "io.h"
+
+static struct io_ops *ops;
+
+int
+ioperm(unsigned long from, unsigned long num, int on)
+{
+    int error;
+    int bwx;
+    size_t len = sizeof(bwx);
+
+    if ((error = sysctlbyname("hw.chipset.bwx", &bwx, &len, 0, 0)) < 0)
+	return error;
+    if (bwx)
+	ops = &bwx_io_ops;
+    else
+	ops = &swiz_io_ops;
+
+    return ops->ioperm(from, num, on);
+}
+
+u_int8_t
+inb(u_int32_t port)
+{
+    return ops->inb(port);
+}
+
+u_int16_t
+inw(u_int32_t port)
+{
+    return ops->inw(port);
+}
+
+u_int32_t
+inl(u_int32_t port)
+{
+    return ops->inl(port);
+}
+
+void
+outb(u_int32_t port, u_int8_t val)
+{
+    ops->outb(port, val);
+}
+
+void
+outw(u_int32_t port, u_int16_t val)
+{
+    ops->outw(port, val);
+}
+
+void
+outl(u_int32_t port, u_int32_t val)
+{
+    ops->outl(port, val);
+}
+
+void *
+map_memory(u_int32_t address, u_int32_t size)
+{
+    return ops->map_memory(address, size);
+}
+
+void
+unmap_memory(void *handle, u_int32_t size)
+{
+    ops->unmap_memory(handle, size);
+}
+
+u_int8_t
+readb(void *handle, u_int32_t offset)
+{
+    return ops->readb(handle, offset);
+}
+
+u_int16_t
+readw(void *handle, u_int32_t offset)
+{
+    return ops->readw(handle, offset);
+}
+
+u_int32_t
+readl(void *handle, u_int32_t offset)
+{
+    return ops->readl(handle, offset);
+}
+
+void
+writeb(void *handle, u_int32_t offset, u_int8_t val)
+{
+    return ops->writeb(handle, offset, val);
+}
+
+void
+writew(void *handle, u_int32_t offset, u_int16_t val)
+{
+    return ops->writew(handle, offset, val);
+}
+
+void
+writel(void *handle, u_int32_t offset, u_int32_t val)
+{
+    return ops->writel(handle, offset, val);
+}
+
+u_int64_t
+dense_base(void)
+{
+    static u_int64_t base = 0;
+
+    if (base == 0) {
+	size_t len = sizeof(base);
+	int error;
+	if ((error = sysctlbyname("hw.chipset.dense", &base, &len,
+				  0, 0)) < 0)
+	    err(1, "hw.chipset.dense");
+    }
+
+    return base;
+}