kern: Add initial ACPI impl

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

2 files changed, 117 insertions, 0 deletions

diff --git a/src/sys/include/acpi/acpi.h b/src/sys/include/acpi/acpi.h
new file mode 100644
index 0000000..e43d2cd
--- /dev/null
+++ b/src/sys/include/acpi/acpi.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * 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 the project 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 _MACHINE_ACPI_H_
+#define _MACHINE_ACPI_H_
+
+#include <sys/types.h>
+#include <acpi/tables.h>
+
+/*
+ * Perform an ACPI checksum on a specific ACPI
+ * header
+ *
+ * @hdr: Header to be verified
+ *
+ * Returns zero on success, otherwise a less than zero
+ * value if the checksum is invalid
+ */
+int acpi_checksum(struct acpi_header *hdr);
+
+/*
+ * Get the number of entries within the root system
+ * descriptor table
+ */
+size_t acpi_get_root_sdt_len(void);
+
+/*
+ * Get the root system descriptor table base
+ * address.
+ */
+void *acpi_get_root_sdt(void);
+
+/*
+ * Query for an ACPI table
+ *
+ * @query: Signature of table to query
+ *
+ * Returns virtual base address of table on success,
+ * otherwise NULL on failure.
+ */
+void *acpi_query(const char *query);
+
+/*
+ * Initialize the ACPI subsystem
+ *
+ * Returns zero on success, otherwise a less than zero
+ * value on failure.
+ */
+int acpi_init(void);
+
+#endif  /* !_MACHINE_ACPI_H_ */
diff --git a/src/sys/include/io/cons/screen.h b/src/sys/include/io/cons/screen.h
new file mode 100644
index 0000000..12bc3b5
--- /dev/null
+++ b/src/sys/include/io/cons/screen.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * 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 the project 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 _CONSOLE_SCREEN_H_
+#define _CONSOLE_SCREEN_H_ 1
+
+/*
+ * Represents a console screen that can be written
+ * to and drawn on.
+ */
+struct conscr {
+};
+
+#endif  /* !_CONSOLE_SCREEN_H_ */