From e2abcdca396661cbe0ae2ddb13d5c2b85682c13a Mon Sep 17 00:00:00 2001
From: Cem Keylan <cem@ckyln.com>
Date: Fri, 16 Oct 2020 17:41:25 +0300
Subject: initial commit

---
 sys/sys/memrange.h | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 sys/sys/memrange.h

(limited to 'sys/sys/memrange.h')

diff --git a/sys/sys/memrange.h b/sys/sys/memrange.h
new file mode 100644
index 0000000..c806e39
--- /dev/null
+++ b/sys/sys/memrange.h
@@ -0,0 +1,97 @@
+/* $OpenBSD: memrange.h,v 1.10 2015/08/18 20:19:32 miod Exp $ */
+/*-
+ * Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
+ * 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.
+ */
+/*
+ * Memory range attribute operations, performed on /dev/mem
+ */
+
+/* Memory range attributes */
+#define MDF_UNCACHEABLE		(1<<0)	/* region not cached */
+#define MDF_WRITECOMBINE	(1<<1)	/* region supports "write combine" action */
+#define MDF_WRITETHROUGH	(1<<2)	/* write-through cached */
+#define MDF_WRITEBACK		(1<<3)	/* write-back cached */
+#define MDF_WRITEPROTECT	(1<<4)	/* read-only region */
+#define MDF_UNKNOWN		(1<<5)	/* any state we don't understand */
+#define MDF_ATTRMASK		(0x00ffffff)
+
+#define MDF_FIXBASE		(1<<24)	/* fixed base */
+#define MDF_FIXLEN		(1<<25)	/* fixed length */
+#define MDF_FIRMWARE		(1<<26)	/* set by firmware (XXX not useful?) */
+#define MDF_ACTIVE		(1<<27)	/* currently active */
+#define MDF_BOGUS		(1<<28)	/* we don't like it */
+#define MDF_FIXACTIVE		(1<<29)	/* can't be turned off */
+#define MDF_FORCE		(1<<31)	/* force risky changes */
+
+struct mem_range_desc {
+	u_int64_t	mr_base;
+	u_int64_t	mr_len;
+	int		mr_flags;
+	char		mr_owner[8];
+};
+
+struct mem_range_op {
+	struct mem_range_desc	*mo_desc;
+	int			mo_arg[2];
+#define MEMRANGE_SET_UPDATE	0
+#define MEMRANGE_SET_REMOVE	1
+	/* XXX want a flag that says "set and undo when I exit" */
+};
+
+#define MEMRANGE_GET	_IOWR('m', 50, struct mem_range_op)
+#define MEMRANGE_SET	_IOW('m', 51, struct mem_range_op)
+
+/* Offset indicating a write combining mapping is requested.  */
+#define MEMRANGE_WC_RANGE	0x4000000000000000ULL
+
+#ifdef _KERNEL
+
+struct mem_range_softc;
+struct mem_range_ops {
+	void	(*init)(struct mem_range_softc *sc);
+	int	(*set)(struct mem_range_softc *sc,
+		    struct mem_range_desc *mrd, int *arg);
+	void	(*initAP)(struct mem_range_softc *sc);
+	void	(*reload)(struct mem_range_softc *sc);
+};
+
+struct mem_range_softc {
+	struct mem_range_ops	*mr_op;
+	int			mr_cap;
+	int			mr_ndesc;
+	struct mem_range_desc 	*mr_desc;
+};
+
+extern struct mem_range_softc mem_range_softc;
+
+__BEGIN_DECLS
+extern void mem_range_attach(void);
+extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
+extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
+extern void mem_range_AP_init(void);
+extern void mem_range_reload(void);
+__END_DECLS
+#endif /* _KERNEL */
+
-- 
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