kernel: dmi: Add '/ctl/dmi/board' ctl entry

Add ctlfs entry for DMI to allow for easy system information from
userspace by reading '/ctl/dmi/*'. This commit implements a ctlfs
node that reports information about the host board.

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 104 insertions, 0 deletions

diff --git a/sys/include/dev/dmi/dmivar.h b/sys/include/dev/dmi/dmivar.h
new file mode 100644
index 0000000..e5da92f
--- /dev/null
+++ b/sys/include/dev/dmi/dmivar.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * 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.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
+ */
+
+#ifndef _DEV_DMIVAR_H_
+#define _DEV_DMIVAR_H_
+
+#include <sys/types.h>
+#include <sys/sio.h>
+#include <fs/ctlfs.h>
+
+extern struct ctlops g_ctl_board_ident;
+
+int dmi_board_ctl_read(struct ctlfs_dev *cdp, struct sio_txn *sio);
+
+#endif  /* !_DEV_DMIVAR_H_ */
diff --git a/sys/include/sys/dmi.h b/sys/include/sys/dmi.h
new file mode 100644
index 0000000..a21cff6
--- /dev/null
+++ b/sys/include/sys/dmi.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * 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.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
+ */
+
+#ifndef _SYS_DMI_H_
+#define _SYS_DMI_H_
+
+#if defined(_KERNEL)
+#include <sys/types.h>
+#else
+#include <stdint.h>
+#include <stddef.h>
+#endif  /* _KERNEL */
+
+/*
+ * Provides board information through
+ * DMI.
+ *
+ * @cpu_version: CPU version string
+ * @cpu_manuf: CPU manufacturer string
+ * @product: Board product string
+ * @vendor: Board vendor string
+ * @version: Product version string
+ *
+ * If index 0 of any of the strings contain
+ * '\0', then they are unsupported/unused.
+ *
+ * XXX: Strings are null terminated
+ */
+struct dmi_board {
+    char cpu_version[64];
+    char cpu_manuf[32];
+    char product[32];
+    char vendor[32];
+    char version[32];
+};
+
+#endif  /* !_SYS_DMI_H_ */