Add device to access and modify Open Firmware NVRAM settings in

PowerPC-based Apple's machines and small utility to do it from
userland modelled after the similar utility in Darwin/OSX.

Only tested on 1.25GHz G4 Mac Mini.

MFC after:	1 month

1 files changed, 68 insertions, 0 deletions

diff --git a/sys/dev/powermac_nvram/powermac_nvramvar.h b/sys/dev/powermac_nvram/powermac_nvramvar.h
new file mode 100644
index 0000000..6f4fb26
--- /dev/null
+++ b/sys/dev/powermac_nvram/powermac_nvramvar.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2006 Maxim Sobolev <sobomax@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 ``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 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_POWERPC_POWERMAC_POWERMAC_NVRAMVAR_H_
+#define	_POWERPC_POWERMAC_POWERMAC_NVRAMVAR_H_
+
+#define	NVRAM_SIZE		0x2000
+
+#define	CORE99_SIGNATURE	0x5a
+
+#ifdef _KERNEL
+
+struct powermac_nvram_softc {
+	device_t		sc_dev;
+	phandle_t		sc_node;
+	vm_offset_t		sc_bank;
+	vm_offset_t		sc_bank0;
+	vm_offset_t		sc_bank1;
+	uint8_t			sc_data[NVRAM_SIZE];
+
+	struct cdev *		sc_cdev;
+	int			sc_isopen;
+	int			sc_rpos;
+	int			sc_wpos;
+};
+
+#endif /* _KERNEL */
+
+struct chrp_header {
+	uint8_t			signature;
+	uint8_t			chrp_checksum;
+	uint16_t		length;
+	char			name[12];
+};
+
+struct core99_header {
+	struct chrp_header	chrp_header;
+	uint32_t		adler_checksum;
+	uint32_t		generation;
+	uint32_t		reserved[2];
+};
+
+#endif  /* _POWERPC_POWERMAC_POWERMAC_NVRAMVAR_H_ */